Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2 | /* |
| 3 | * Generic OPP Interface |
| 4 | * |
| 5 | * Copyright (C) 2009-2010 Texas Instruments Incorporated. |
| 6 | * Nishanth Menon |
| 7 | * Romit Dasgupta |
| 8 | * Kevin Hilman |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 9 | */ |
| 10 | |
Viresh Kumar | d6d2a52 | 2015-10-17 09:45:18 +0530 | [diff] [blame] | 11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 12 | |
Viresh Kumar | d54974c | 2016-02-09 10:30:38 +0530 | [diff] [blame] | 13 | #include <linux/clk.h> |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 14 | #include <linux/errno.h> |
| 15 | #include <linux/err.h> |
Paul Gortmaker | 51990e8 | 2012-01-22 11:23:42 -0500 | [diff] [blame] | 16 | #include <linux/device.h> |
Liam Girdwood | 80126ce | 2012-10-23 01:27:44 +0200 | [diff] [blame] | 17 | #include <linux/export.h> |
Viresh Kumar | 009acd1 | 2017-10-11 12:54:14 +0530 | [diff] [blame] | 18 | #include <linux/pm_domain.h> |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 19 | #include <linux/regulator/consumer.h> |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 20 | #include <linux/slab.h> |
| 21 | #include <linux/xarray.h> |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 22 | |
Viresh Kumar | f59d3ee | 2015-09-04 13:47:26 +0530 | [diff] [blame] | 23 | #include "opp.h" |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 24 | |
| 25 | /* |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 26 | * The root of the list of all opp-tables. All opp_table structures branch off |
| 27 | * from here, with each opp_table containing the list of opps it supports in |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 28 | * various states of availability. |
| 29 | */ |
Viresh Kumar | f47b72a | 2016-05-05 16:20:33 +0530 | [diff] [blame] | 30 | LIST_HEAD(opp_tables); |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 31 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 32 | /* Lock to allow exclusive modification to the device and opp lists */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 33 | DEFINE_MUTEX(opp_table_lock); |
Viresh Kumar | 27c0948 | 2020-10-27 16:53:21 +0530 | [diff] [blame] | 34 | /* Flag indicating that opp_tables list is being updated at the moment */ |
| 35 | static bool opp_tables_busy; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 36 | |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 37 | /* OPP ID allocator */ |
| 38 | static DEFINE_XARRAY_ALLOC1(opp_configs); |
| 39 | |
Viresh Kumar | 9e62eda | 2020-10-27 11:49:03 +0530 | [diff] [blame] | 40 | static bool _find_opp_dev(const struct device *dev, struct opp_table *opp_table) |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 41 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 42 | struct opp_device *opp_dev; |
Viresh Kumar | 9e62eda | 2020-10-27 11:49:03 +0530 | [diff] [blame] | 43 | bool found = false; |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 44 | |
Viresh Kumar | 9e62eda | 2020-10-27 11:49:03 +0530 | [diff] [blame] | 45 | mutex_lock(&opp_table->lock); |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 46 | list_for_each_entry(opp_dev, &opp_table->dev_list, node) |
Viresh Kumar | 9e62eda | 2020-10-27 11:49:03 +0530 | [diff] [blame] | 47 | if (opp_dev->dev == dev) { |
| 48 | found = true; |
| 49 | break; |
| 50 | } |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 51 | |
Viresh Kumar | 9e62eda | 2020-10-27 11:49:03 +0530 | [diff] [blame] | 52 | mutex_unlock(&opp_table->lock); |
| 53 | return found; |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 54 | } |
| 55 | |
Wei Yongjun | 6ac4239 | 2017-02-06 14:29:55 +0000 | [diff] [blame] | 56 | static struct opp_table *_find_opp_table_unlocked(struct device *dev) |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 57 | { |
| 58 | struct opp_table *opp_table; |
| 59 | |
| 60 | list_for_each_entry(opp_table, &opp_tables, node) { |
Viresh Kumar | 9e62eda | 2020-10-27 11:49:03 +0530 | [diff] [blame] | 61 | if (_find_opp_dev(dev, opp_table)) { |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 62 | _get_opp_table_kref(opp_table); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 63 | return opp_table; |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | return ERR_PTR(-ENODEV); |
| 68 | } |
| 69 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 70 | /** |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 71 | * _find_opp_table() - find opp_table struct using device pointer |
| 72 | * @dev: device pointer used to lookup OPP table |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 73 | * |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 74 | * Search OPP table for one containing matching device. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 75 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 76 | * Return: pointer to 'struct opp_table' if found, otherwise -ENODEV or |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 77 | * -EINVAL based on type of error. |
| 78 | * |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 79 | * The callers must call dev_pm_opp_put_opp_table() after the table is used. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 80 | */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 81 | struct opp_table *_find_opp_table(struct device *dev) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 82 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 83 | struct opp_table *opp_table; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 84 | |
Viresh Kumar | 50a3cb0 | 2015-08-12 15:59:39 +0530 | [diff] [blame] | 85 | if (IS_ERR_OR_NULL(dev)) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 86 | pr_err("%s: Invalid parameters\n", __func__); |
| 87 | return ERR_PTR(-EINVAL); |
| 88 | } |
| 89 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 90 | mutex_lock(&opp_table_lock); |
| 91 | opp_table = _find_opp_table_unlocked(dev); |
| 92 | mutex_unlock(&opp_table_lock); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 93 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 94 | return opp_table; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 95 | } |
| 96 | |
Viresh Kumar | f123ea7 | 2022-06-10 10:27:51 +0530 | [diff] [blame] | 97 | /* |
| 98 | * Returns true if multiple clocks aren't there, else returns false with WARN. |
| 99 | * |
| 100 | * We don't force clk_count == 1 here as there are users who don't have a clock |
| 101 | * representation in the OPP table and manage the clock configuration themselves |
| 102 | * in an platform specific way. |
| 103 | */ |
| 104 | static bool assert_single_clk(struct opp_table *opp_table) |
| 105 | { |
| 106 | return !WARN_ON(opp_table->clk_count > 1); |
| 107 | } |
| 108 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 109 | /** |
Linus Torvalds | baf51c4 | 2015-11-11 09:03:01 -0800 | [diff] [blame] | 110 | * dev_pm_opp_get_voltage() - Gets the voltage corresponding to an opp |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 111 | * @opp: opp for which voltage has to be returned for |
| 112 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 113 | * Return: voltage in micro volt corresponding to the opp, else |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 114 | * return 0 |
| 115 | * |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 116 | * This is useful only for devices with single power supply. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 117 | */ |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 118 | unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 119 | { |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 120 | if (IS_ERR_OR_NULL(opp)) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 121 | pr_err("%s: Invalid parameters\n", __func__); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 122 | return 0; |
| 123 | } |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 124 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 125 | return opp->supplies[0].u_volt; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 126 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 127 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_voltage); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 128 | |
| 129 | /** |
Viresh Kumar | 69b1af1 | 2022-05-31 13:24:21 +0530 | [diff] [blame] | 130 | * dev_pm_opp_get_supplies() - Gets the supply information corresponding to an opp |
| 131 | * @opp: opp for which voltage has to be returned for |
| 132 | * @supplies: Placeholder for copying the supply information. |
| 133 | * |
| 134 | * Return: negative error number on failure, 0 otherwise on success after |
| 135 | * setting @supplies. |
| 136 | * |
| 137 | * This can be used for devices with any number of power supplies. The caller |
| 138 | * must ensure the @supplies array must contain space for each regulator. |
| 139 | */ |
| 140 | int dev_pm_opp_get_supplies(struct dev_pm_opp *opp, |
| 141 | struct dev_pm_opp_supply *supplies) |
| 142 | { |
| 143 | if (IS_ERR_OR_NULL(opp) || !supplies) { |
| 144 | pr_err("%s: Invalid parameters\n", __func__); |
| 145 | return -EINVAL; |
| 146 | } |
| 147 | |
| 148 | memcpy(supplies, opp->supplies, |
| 149 | sizeof(*supplies) * opp->opp_table->regulator_count); |
| 150 | return 0; |
| 151 | } |
| 152 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_supplies); |
| 153 | |
| 154 | /** |
Lukasz Luba | 4f9a7a1 | 2022-03-02 11:29:14 +0000 | [diff] [blame] | 155 | * dev_pm_opp_get_power() - Gets the power corresponding to an opp |
| 156 | * @opp: opp for which power has to be returned for |
| 157 | * |
| 158 | * Return: power in micro watt corresponding to the opp, else |
| 159 | * return 0 |
| 160 | * |
| 161 | * This is useful only for devices with single power supply. |
| 162 | */ |
| 163 | unsigned long dev_pm_opp_get_power(struct dev_pm_opp *opp) |
| 164 | { |
| 165 | unsigned long opp_power = 0; |
| 166 | int i; |
| 167 | |
| 168 | if (IS_ERR_OR_NULL(opp)) { |
| 169 | pr_err("%s: Invalid parameters\n", __func__); |
| 170 | return 0; |
| 171 | } |
| 172 | for (i = 0; i < opp->opp_table->regulator_count; i++) |
| 173 | opp_power += opp->supplies[i].u_watt; |
| 174 | |
| 175 | return opp_power; |
| 176 | } |
| 177 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_power); |
| 178 | |
| 179 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 180 | * dev_pm_opp_get_freq() - Gets the frequency corresponding to an available opp |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 181 | * @opp: opp for which frequency has to be returned for |
| 182 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 183 | * Return: frequency in hertz corresponding to the opp, else |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 184 | * return 0 |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 185 | */ |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 186 | unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 187 | { |
Andrew-sh.Cheng | 06a8a05 | 2020-07-20 16:55:26 +0800 | [diff] [blame] | 188 | if (IS_ERR_OR_NULL(opp)) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 189 | pr_err("%s: Invalid parameters\n", __func__); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 190 | return 0; |
| 191 | } |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 192 | |
Viresh Kumar | f123ea7 | 2022-06-10 10:27:51 +0530 | [diff] [blame] | 193 | if (!assert_single_clk(opp->opp_table)) |
| 194 | return 0; |
| 195 | |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 196 | return opp->rates[0]; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 197 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 198 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 199 | |
| 200 | /** |
Rajendra Nayak | 5b93ac5 | 2019-01-10 09:32:02 +0530 | [diff] [blame] | 201 | * dev_pm_opp_get_level() - Gets the level corresponding to an available opp |
| 202 | * @opp: opp for which level value has to be returned for |
| 203 | * |
| 204 | * Return: level read from device tree corresponding to the opp, else |
| 205 | * return 0. |
| 206 | */ |
| 207 | unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp) |
| 208 | { |
| 209 | if (IS_ERR_OR_NULL(opp) || !opp->available) { |
| 210 | pr_err("%s: Invalid parameters\n", __func__); |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | return opp->level; |
| 215 | } |
| 216 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_level); |
| 217 | |
| 218 | /** |
Dmitry Osipenko | 597ff54 | 2021-01-18 03:55:19 +0300 | [diff] [blame] | 219 | * dev_pm_opp_get_required_pstate() - Gets the required performance state |
| 220 | * corresponding to an available opp |
| 221 | * @opp: opp for which performance state has to be returned for |
| 222 | * @index: index of the required opp |
| 223 | * |
| 224 | * Return: performance state read from device tree corresponding to the |
| 225 | * required opp, else return 0. |
| 226 | */ |
| 227 | unsigned int dev_pm_opp_get_required_pstate(struct dev_pm_opp *opp, |
| 228 | unsigned int index) |
| 229 | { |
Viresh Kumar | 84cb7ff | 2023-06-14 15:57:43 +0530 | [diff] [blame] | 230 | struct opp_table *opp_table = opp->opp_table; |
| 231 | |
Dmitry Osipenko | 597ff54 | 2021-01-18 03:55:19 +0300 | [diff] [blame] | 232 | if (IS_ERR_OR_NULL(opp) || !opp->available || |
Viresh Kumar | 84cb7ff | 2023-06-14 15:57:43 +0530 | [diff] [blame] | 233 | index >= opp_table->required_opp_count) { |
Dmitry Osipenko | 597ff54 | 2021-01-18 03:55:19 +0300 | [diff] [blame] | 234 | pr_err("%s: Invalid parameters\n", __func__); |
| 235 | return 0; |
| 236 | } |
| 237 | |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 238 | /* required-opps not fully initialized yet */ |
Viresh Kumar | 84cb7ff | 2023-06-14 15:57:43 +0530 | [diff] [blame] | 239 | if (lazy_linking_pending(opp_table)) |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 240 | return 0; |
| 241 | |
Viresh Kumar | 84cb7ff | 2023-06-14 15:57:43 +0530 | [diff] [blame] | 242 | /* The required OPP table must belong to a genpd */ |
| 243 | if (unlikely(!opp_table->required_opp_tables[index]->is_genpd)) { |
| 244 | pr_err("%s: Performance state is only valid for genpds.\n", __func__); |
| 245 | return 0; |
| 246 | } |
| 247 | |
Viresh Kumar | 7c41cdc | 2023-06-14 15:29:32 +0530 | [diff] [blame] | 248 | return opp->required_opps[index]->level; |
Dmitry Osipenko | 597ff54 | 2021-01-18 03:55:19 +0300 | [diff] [blame] | 249 | } |
| 250 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_required_pstate); |
| 251 | |
| 252 | /** |
Bartlomiej Zolnierkiewicz | 19445b2 | 2015-07-09 17:43:35 +0200 | [diff] [blame] | 253 | * dev_pm_opp_is_turbo() - Returns if opp is turbo OPP or not |
| 254 | * @opp: opp for which turbo mode is being verified |
| 255 | * |
| 256 | * Turbo OPPs are not for normal use, and can be enabled (under certain |
| 257 | * conditions) for short duration of times to finish high throughput work |
| 258 | * quickly. Running on them for longer times may overheat the chip. |
| 259 | * |
| 260 | * Return: true if opp is turbo opp, else false. |
Bartlomiej Zolnierkiewicz | 19445b2 | 2015-07-09 17:43:35 +0200 | [diff] [blame] | 261 | */ |
| 262 | bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp) |
| 263 | { |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 264 | if (IS_ERR_OR_NULL(opp) || !opp->available) { |
Bartlomiej Zolnierkiewicz | 19445b2 | 2015-07-09 17:43:35 +0200 | [diff] [blame] | 265 | pr_err("%s: Invalid parameters\n", __func__); |
| 266 | return false; |
| 267 | } |
| 268 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 269 | return opp->turbo; |
Bartlomiej Zolnierkiewicz | 19445b2 | 2015-07-09 17:43:35 +0200 | [diff] [blame] | 270 | } |
| 271 | EXPORT_SYMBOL_GPL(dev_pm_opp_is_turbo); |
| 272 | |
| 273 | /** |
Viresh Kumar | 3ca9bb3 | 2015-07-29 16:23:03 +0530 | [diff] [blame] | 274 | * dev_pm_opp_get_max_clock_latency() - Get max clock latency in nanoseconds |
| 275 | * @dev: device for which we do this operation |
| 276 | * |
| 277 | * Return: This function returns the max clock latency in nanoseconds. |
Viresh Kumar | 3ca9bb3 | 2015-07-29 16:23:03 +0530 | [diff] [blame] | 278 | */ |
| 279 | unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev) |
| 280 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 281 | struct opp_table *opp_table; |
Viresh Kumar | 3ca9bb3 | 2015-07-29 16:23:03 +0530 | [diff] [blame] | 282 | unsigned long clock_latency_ns; |
| 283 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 284 | opp_table = _find_opp_table(dev); |
| 285 | if (IS_ERR(opp_table)) |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 286 | return 0; |
Viresh Kumar | 3ca9bb3 | 2015-07-29 16:23:03 +0530 | [diff] [blame] | 287 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 288 | clock_latency_ns = opp_table->clock_latency_ns_max; |
| 289 | |
| 290 | dev_pm_opp_put_opp_table(opp_table); |
| 291 | |
Viresh Kumar | 3ca9bb3 | 2015-07-29 16:23:03 +0530 | [diff] [blame] | 292 | return clock_latency_ns; |
| 293 | } |
| 294 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_clock_latency); |
| 295 | |
| 296 | /** |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 297 | * dev_pm_opp_get_max_volt_latency() - Get max voltage latency in nanoseconds |
| 298 | * @dev: device for which we do this operation |
| 299 | * |
| 300 | * Return: This function returns the max voltage latency in nanoseconds. |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 301 | */ |
| 302 | unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev) |
| 303 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 304 | struct opp_table *opp_table; |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 305 | struct dev_pm_opp *opp; |
Viresh Kumar | 478256b | 2017-05-23 09:32:11 +0530 | [diff] [blame] | 306 | struct regulator *reg; |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 307 | unsigned long latency_ns = 0; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 308 | int ret, i, count; |
| 309 | struct { |
| 310 | unsigned long min; |
| 311 | unsigned long max; |
| 312 | } *uV; |
| 313 | |
Viresh Kumar | cdd3e61 | 2017-01-23 10:11:51 +0530 | [diff] [blame] | 314 | opp_table = _find_opp_table(dev); |
| 315 | if (IS_ERR(opp_table)) |
| 316 | return 0; |
| 317 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 318 | /* Regulator may not be required for the device */ |
Viresh Kumar | 90e3577 | 2018-12-11 16:32:47 +0530 | [diff] [blame] | 319 | if (!opp_table->regulators) |
Viresh Kumar | cdd3e61 | 2017-01-23 10:11:51 +0530 | [diff] [blame] | 320 | goto put_opp_table; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 321 | |
Viresh Kumar | 90e3577 | 2018-12-11 16:32:47 +0530 | [diff] [blame] | 322 | count = opp_table->regulator_count; |
| 323 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 324 | uV = kmalloc_array(count, sizeof(*uV), GFP_KERNEL); |
| 325 | if (!uV) |
Viresh Kumar | 478256b | 2017-05-23 09:32:11 +0530 | [diff] [blame] | 326 | goto put_opp_table; |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 327 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 328 | mutex_lock(&opp_table->lock); |
| 329 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 330 | for (i = 0; i < count; i++) { |
| 331 | uV[i].min = ~0; |
| 332 | uV[i].max = 0; |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 333 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 334 | list_for_each_entry(opp, &opp_table->opp_list, node) { |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 335 | if (!opp->available) |
| 336 | continue; |
| 337 | |
| 338 | if (opp->supplies[i].u_volt_min < uV[i].min) |
| 339 | uV[i].min = opp->supplies[i].u_volt_min; |
| 340 | if (opp->supplies[i].u_volt_max > uV[i].max) |
| 341 | uV[i].max = opp->supplies[i].u_volt_max; |
| 342 | } |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 343 | } |
| 344 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 345 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 346 | |
| 347 | /* |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 348 | * The caller needs to ensure that opp_table (and hence the regulator) |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 349 | * isn't freed, while we are executing this routine. |
| 350 | */ |
Andrzej Hajda | 8cc31116 | 2017-02-20 19:57:57 +0100 | [diff] [blame] | 351 | for (i = 0; i < count; i++) { |
Viresh Kumar | 478256b | 2017-05-23 09:32:11 +0530 | [diff] [blame] | 352 | reg = opp_table->regulators[i]; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 353 | ret = regulator_set_voltage_time(reg, uV[i].min, uV[i].max); |
| 354 | if (ret > 0) |
| 355 | latency_ns += ret * 1000; |
| 356 | } |
| 357 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 358 | kfree(uV); |
Viresh Kumar | cdd3e61 | 2017-01-23 10:11:51 +0530 | [diff] [blame] | 359 | put_opp_table: |
| 360 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 361 | |
| 362 | return latency_ns; |
| 363 | } |
| 364 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_volt_latency); |
| 365 | |
| 366 | /** |
Viresh Kumar | 2174344 | 2016-02-09 10:30:36 +0530 | [diff] [blame] | 367 | * dev_pm_opp_get_max_transition_latency() - Get max transition latency in |
| 368 | * nanoseconds |
| 369 | * @dev: device for which we do this operation |
| 370 | * |
| 371 | * Return: This function returns the max transition latency, in nanoseconds, to |
| 372 | * switch from one OPP to other. |
Viresh Kumar | 2174344 | 2016-02-09 10:30:36 +0530 | [diff] [blame] | 373 | */ |
| 374 | unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev) |
| 375 | { |
| 376 | return dev_pm_opp_get_max_volt_latency(dev) + |
| 377 | dev_pm_opp_get_max_clock_latency(dev); |
| 378 | } |
| 379 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_transition_latency); |
| 380 | |
| 381 | /** |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 382 | * dev_pm_opp_get_suspend_opp_freq() - Get frequency of suspend opp in Hz |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 383 | * @dev: device for which we do this operation |
| 384 | * |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 385 | * Return: This function returns the frequency of the OPP marked as suspend_opp |
| 386 | * if one is available, else returns 0; |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 387 | */ |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 388 | unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev) |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 389 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 390 | struct opp_table *opp_table; |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 391 | unsigned long freq = 0; |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 392 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 393 | opp_table = _find_opp_table(dev); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 394 | if (IS_ERR(opp_table)) |
| 395 | return 0; |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 396 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 397 | if (opp_table->suspend_opp && opp_table->suspend_opp->available) |
| 398 | freq = dev_pm_opp_get_freq(opp_table->suspend_opp); |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 399 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 400 | dev_pm_opp_put_opp_table(opp_table); |
| 401 | |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 402 | return freq; |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 403 | } |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 404 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp_freq); |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 405 | |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 406 | int _get_opp_count(struct opp_table *opp_table) |
| 407 | { |
| 408 | struct dev_pm_opp *opp; |
| 409 | int count = 0; |
| 410 | |
| 411 | mutex_lock(&opp_table->lock); |
| 412 | |
| 413 | list_for_each_entry(opp, &opp_table->opp_list, node) { |
| 414 | if (opp->available) |
| 415 | count++; |
| 416 | } |
| 417 | |
| 418 | mutex_unlock(&opp_table->lock); |
| 419 | |
| 420 | return count; |
| 421 | } |
| 422 | |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 423 | /** |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 424 | * dev_pm_opp_get_opp_count() - Get number of opps available in the opp table |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 425 | * @dev: device for which we do this operation |
| 426 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 427 | * Return: This function returns the number of available opps if there are any, |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 428 | * else returns 0 if none or the corresponding error value. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 429 | */ |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 430 | int dev_pm_opp_get_opp_count(struct device *dev) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 431 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 432 | struct opp_table *opp_table; |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 433 | int count; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 434 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 435 | opp_table = _find_opp_table(dev); |
| 436 | if (IS_ERR(opp_table)) { |
| 437 | count = PTR_ERR(opp_table); |
Fabio Estevam | 035ed07 | 2017-09-29 14:39:49 -0300 | [diff] [blame] | 438 | dev_dbg(dev, "%s: OPP table not found (%d)\n", |
Dmitry Torokhov | b4718c0 | 2014-12-16 15:09:38 -0800 | [diff] [blame] | 439 | __func__, count); |
Viresh Kumar | 09f662f | 2018-10-03 15:22:03 +0530 | [diff] [blame] | 440 | return count; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 441 | } |
| 442 | |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 443 | count = _get_opp_count(opp_table); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 444 | dev_pm_opp_put_opp_table(opp_table); |
| 445 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 446 | return count; |
| 447 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 448 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_count); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 449 | |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 450 | /* Helpers to read keys */ |
| 451 | static unsigned long _read_freq(struct dev_pm_opp *opp, int index) |
| 452 | { |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 453 | return opp->rates[0]; |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 454 | } |
| 455 | |
Viresh Kumar | c2ab2cb | 2022-06-02 13:05:45 +0530 | [diff] [blame] | 456 | static unsigned long _read_level(struct dev_pm_opp *opp, int index) |
| 457 | { |
| 458 | return opp->level; |
| 459 | } |
| 460 | |
Viresh Kumar | add1dc0 | 2022-06-02 13:05:45 +0530 | [diff] [blame] | 461 | static unsigned long _read_bw(struct dev_pm_opp *opp, int index) |
| 462 | { |
| 463 | return opp->bandwidth[index].peak; |
| 464 | } |
| 465 | |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 466 | /* Generic comparison helpers */ |
| 467 | static bool _compare_exact(struct dev_pm_opp **opp, struct dev_pm_opp *temp_opp, |
| 468 | unsigned long opp_key, unsigned long key) |
| 469 | { |
| 470 | if (opp_key == key) { |
| 471 | *opp = temp_opp; |
| 472 | return true; |
| 473 | } |
| 474 | |
| 475 | return false; |
| 476 | } |
| 477 | |
| 478 | static bool _compare_ceil(struct dev_pm_opp **opp, struct dev_pm_opp *temp_opp, |
| 479 | unsigned long opp_key, unsigned long key) |
| 480 | { |
| 481 | if (opp_key >= key) { |
| 482 | *opp = temp_opp; |
| 483 | return true; |
| 484 | } |
| 485 | |
| 486 | return false; |
| 487 | } |
| 488 | |
| 489 | static bool _compare_floor(struct dev_pm_opp **opp, struct dev_pm_opp *temp_opp, |
| 490 | unsigned long opp_key, unsigned long key) |
| 491 | { |
| 492 | if (opp_key > key) |
| 493 | return true; |
| 494 | |
| 495 | *opp = temp_opp; |
| 496 | return false; |
| 497 | } |
| 498 | |
| 499 | /* Generic key finding helpers */ |
| 500 | static struct dev_pm_opp *_opp_table_find_key(struct opp_table *opp_table, |
| 501 | unsigned long *key, int index, bool available, |
| 502 | unsigned long (*read)(struct dev_pm_opp *opp, int index), |
| 503 | bool (*compare)(struct dev_pm_opp **opp, struct dev_pm_opp *temp_opp, |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 504 | unsigned long opp_key, unsigned long key), |
| 505 | bool (*assert)(struct opp_table *opp_table)) |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 506 | { |
| 507 | struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); |
| 508 | |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 509 | /* Assert that the requirement is met */ |
| 510 | if (assert && !assert(opp_table)) |
| 511 | return ERR_PTR(-EINVAL); |
| 512 | |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 513 | mutex_lock(&opp_table->lock); |
| 514 | |
| 515 | list_for_each_entry(temp_opp, &opp_table->opp_list, node) { |
| 516 | if (temp_opp->available == available) { |
| 517 | if (compare(&opp, temp_opp, read(temp_opp, index), *key)) |
| 518 | break; |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | /* Increment the reference count of OPP */ |
| 523 | if (!IS_ERR(opp)) { |
| 524 | *key = read(opp, index); |
| 525 | dev_pm_opp_get(opp); |
| 526 | } |
| 527 | |
| 528 | mutex_unlock(&opp_table->lock); |
| 529 | |
| 530 | return opp; |
| 531 | } |
| 532 | |
| 533 | static struct dev_pm_opp * |
| 534 | _find_key(struct device *dev, unsigned long *key, int index, bool available, |
| 535 | unsigned long (*read)(struct dev_pm_opp *opp, int index), |
| 536 | bool (*compare)(struct dev_pm_opp **opp, struct dev_pm_opp *temp_opp, |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 537 | unsigned long opp_key, unsigned long key), |
| 538 | bool (*assert)(struct opp_table *opp_table)) |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 539 | { |
| 540 | struct opp_table *opp_table; |
| 541 | struct dev_pm_opp *opp; |
| 542 | |
| 543 | opp_table = _find_opp_table(dev); |
| 544 | if (IS_ERR(opp_table)) { |
| 545 | dev_err(dev, "%s: OPP table not found (%ld)\n", __func__, |
| 546 | PTR_ERR(opp_table)); |
| 547 | return ERR_CAST(opp_table); |
| 548 | } |
| 549 | |
| 550 | opp = _opp_table_find_key(opp_table, key, index, available, read, |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 551 | compare, assert); |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 552 | |
| 553 | dev_pm_opp_put_opp_table(opp_table); |
| 554 | |
| 555 | return opp; |
| 556 | } |
| 557 | |
| 558 | static struct dev_pm_opp *_find_key_exact(struct device *dev, |
| 559 | unsigned long key, int index, bool available, |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 560 | unsigned long (*read)(struct dev_pm_opp *opp, int index), |
| 561 | bool (*assert)(struct opp_table *opp_table)) |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 562 | { |
| 563 | /* |
| 564 | * The value of key will be updated here, but will be ignored as the |
| 565 | * caller doesn't need it. |
| 566 | */ |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 567 | return _find_key(dev, &key, index, available, read, _compare_exact, |
| 568 | assert); |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 569 | } |
| 570 | |
| 571 | static struct dev_pm_opp *_opp_table_find_key_ceil(struct opp_table *opp_table, |
| 572 | unsigned long *key, int index, bool available, |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 573 | unsigned long (*read)(struct dev_pm_opp *opp, int index), |
| 574 | bool (*assert)(struct opp_table *opp_table)) |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 575 | { |
| 576 | return _opp_table_find_key(opp_table, key, index, available, read, |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 577 | _compare_ceil, assert); |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 578 | } |
| 579 | |
| 580 | static struct dev_pm_opp *_find_key_ceil(struct device *dev, unsigned long *key, |
| 581 | int index, bool available, |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 582 | unsigned long (*read)(struct dev_pm_opp *opp, int index), |
| 583 | bool (*assert)(struct opp_table *opp_table)) |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 584 | { |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 585 | return _find_key(dev, key, index, available, read, _compare_ceil, |
| 586 | assert); |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 587 | } |
| 588 | |
| 589 | static struct dev_pm_opp *_find_key_floor(struct device *dev, |
| 590 | unsigned long *key, int index, bool available, |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 591 | unsigned long (*read)(struct dev_pm_opp *opp, int index), |
| 592 | bool (*assert)(struct opp_table *opp_table)) |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 593 | { |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 594 | return _find_key(dev, key, index, available, read, _compare_floor, |
| 595 | assert); |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 596 | } |
| 597 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 598 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 599 | * dev_pm_opp_find_freq_exact() - search for an exact frequency |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 600 | * @dev: device for which we do this operation |
| 601 | * @freq: frequency to search for |
Nishanth Menon | 7ae4961 | 2011-02-25 23:46:18 +0100 | [diff] [blame] | 602 | * @available: true/false - match for available opp |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 603 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 604 | * Return: Searches for exact match in the opp table and returns pointer to the |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 605 | * matching opp if found, else returns ERR_PTR in case of error and should |
| 606 | * be handled using IS_ERR. Error return values can be: |
Nishanth Menon | 0779726 | 2012-10-24 22:00:12 +0200 | [diff] [blame] | 607 | * EINVAL: for bad pointer |
| 608 | * ERANGE: no match found for search |
| 609 | * ENODEV: if device not found in list of registered devices |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 610 | * |
| 611 | * Note: available is a modifier for the search. if available=true, then the |
| 612 | * match is for exact matching frequency and is available in the stored OPP |
| 613 | * table. if false, the match is for exact frequency which is not available. |
| 614 | * |
| 615 | * This provides a mechanism to enable an opp which is not available currently |
| 616 | * or the opposite as well. |
| 617 | * |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 618 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 619 | * use. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 620 | */ |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 621 | struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev, |
Viresh Kumar | aab8ced | 2022-06-02 13:03:05 +0530 | [diff] [blame] | 622 | unsigned long freq, bool available) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 623 | { |
Viresh Kumar | f123ea7 | 2022-06-10 10:27:51 +0530 | [diff] [blame] | 624 | return _find_key_exact(dev, freq, 0, available, _read_freq, |
| 625 | assert_single_clk); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 626 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 627 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 628 | |
Jisheng Zhang | 067b7ce | 2016-07-25 14:11:16 +0800 | [diff] [blame] | 629 | static noinline struct dev_pm_opp *_find_freq_ceil(struct opp_table *opp_table, |
| 630 | unsigned long *freq) |
| 631 | { |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 632 | return _opp_table_find_key_ceil(opp_table, freq, 0, true, _read_freq, |
Viresh Kumar | f123ea7 | 2022-06-10 10:27:51 +0530 | [diff] [blame] | 633 | assert_single_clk); |
Jisheng Zhang | 067b7ce | 2016-07-25 14:11:16 +0800 | [diff] [blame] | 634 | } |
| 635 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 636 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 637 | * dev_pm_opp_find_freq_ceil() - Search for an rounded ceil freq |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 638 | * @dev: device for which we do this operation |
| 639 | * @freq: Start frequency |
| 640 | * |
| 641 | * Search for the matching ceil *available* OPP from a starting freq |
| 642 | * for a device. |
| 643 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 644 | * Return: matching *opp and refreshes *freq accordingly, else returns |
Nishanth Menon | 0779726 | 2012-10-24 22:00:12 +0200 | [diff] [blame] | 645 | * ERR_PTR in case of error and should be handled using IS_ERR. Error return |
| 646 | * values can be: |
| 647 | * EINVAL: for bad pointer |
| 648 | * ERANGE: no match found for search |
| 649 | * ENODEV: if device not found in list of registered devices |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 650 | * |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 651 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 652 | * use. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 653 | */ |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 654 | struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev, |
| 655 | unsigned long *freq) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 656 | { |
Viresh Kumar | f123ea7 | 2022-06-10 10:27:51 +0530 | [diff] [blame] | 657 | return _find_key_ceil(dev, freq, 0, true, _read_freq, assert_single_clk); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 658 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 659 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 660 | |
| 661 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 662 | * dev_pm_opp_find_freq_floor() - Search for a rounded floor freq |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 663 | * @dev: device for which we do this operation |
| 664 | * @freq: Start frequency |
| 665 | * |
| 666 | * Search for the matching floor *available* OPP from a starting freq |
| 667 | * for a device. |
| 668 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 669 | * Return: matching *opp and refreshes *freq accordingly, else returns |
Nishanth Menon | 0779726 | 2012-10-24 22:00:12 +0200 | [diff] [blame] | 670 | * ERR_PTR in case of error and should be handled using IS_ERR. Error return |
| 671 | * values can be: |
| 672 | * EINVAL: for bad pointer |
| 673 | * ERANGE: no match found for search |
| 674 | * ENODEV: if device not found in list of registered devices |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 675 | * |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 676 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 677 | * use. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 678 | */ |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 679 | struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev, |
| 680 | unsigned long *freq) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 681 | { |
Viresh Kumar | f123ea7 | 2022-06-10 10:27:51 +0530 | [diff] [blame] | 682 | return _find_key_floor(dev, freq, 0, true, _read_freq, assert_single_clk); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 683 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 684 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 685 | |
Andrew-sh.Cheng | 2f36bde | 2019-03-29 14:46:10 +0800 | [diff] [blame] | 686 | /** |
Viresh Kumar | 22079af | 2022-05-04 15:40:22 +0530 | [diff] [blame] | 687 | * dev_pm_opp_find_level_exact() - search for an exact level |
| 688 | * @dev: device for which we do this operation |
| 689 | * @level: level to search for |
| 690 | * |
| 691 | * Return: Searches for exact match in the opp table and returns pointer to the |
| 692 | * matching opp if found, else returns ERR_PTR in case of error and should |
| 693 | * be handled using IS_ERR. Error return values can be: |
| 694 | * EINVAL: for bad pointer |
| 695 | * ERANGE: no match found for search |
| 696 | * ENODEV: if device not found in list of registered devices |
| 697 | * |
| 698 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 699 | * use. |
| 700 | */ |
| 701 | struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev, |
| 702 | unsigned int level) |
| 703 | { |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 704 | return _find_key_exact(dev, level, 0, true, _read_level, NULL); |
Viresh Kumar | 22079af | 2022-05-04 15:40:22 +0530 | [diff] [blame] | 705 | } |
| 706 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_exact); |
| 707 | |
| 708 | /** |
| 709 | * dev_pm_opp_find_level_ceil() - search for an rounded up level |
| 710 | * @dev: device for which we do this operation |
| 711 | * @level: level to search for |
| 712 | * |
| 713 | * Return: Searches for rounded up match in the opp table and returns pointer |
| 714 | * to the matching opp if found, else returns ERR_PTR in case of error and |
| 715 | * should be handled using IS_ERR. Error return values can be: |
| 716 | * EINVAL: for bad pointer |
| 717 | * ERANGE: no match found for search |
| 718 | * ENODEV: if device not found in list of registered devices |
| 719 | * |
| 720 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 721 | * use. |
| 722 | */ |
| 723 | struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev, |
| 724 | unsigned int *level) |
| 725 | { |
Viresh Kumar | c2ab2cb | 2022-06-02 13:05:45 +0530 | [diff] [blame] | 726 | unsigned long temp = *level; |
| 727 | struct dev_pm_opp *opp; |
Viresh Kumar | 22079af | 2022-05-04 15:40:22 +0530 | [diff] [blame] | 728 | |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 729 | opp = _find_key_ceil(dev, &temp, 0, true, _read_level, NULL); |
Viresh Kumar | c2ab2cb | 2022-06-02 13:05:45 +0530 | [diff] [blame] | 730 | *level = temp; |
Viresh Kumar | 22079af | 2022-05-04 15:40:22 +0530 | [diff] [blame] | 731 | return opp; |
| 732 | } |
| 733 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_ceil); |
| 734 | |
| 735 | /** |
Krzysztof Kozlowski | 00ce387 | 2022-05-04 10:17:32 +0200 | [diff] [blame] | 736 | * dev_pm_opp_find_bw_ceil() - Search for a rounded ceil bandwidth |
| 737 | * @dev: device for which we do this operation |
Yang Li | 617df30 | 2022-05-26 21:20:35 +0800 | [diff] [blame] | 738 | * @bw: start bandwidth |
Krzysztof Kozlowski | 00ce387 | 2022-05-04 10:17:32 +0200 | [diff] [blame] | 739 | * @index: which bandwidth to compare, in case of OPPs with several values |
| 740 | * |
| 741 | * Search for the matching floor *available* OPP from a starting bandwidth |
| 742 | * for a device. |
| 743 | * |
| 744 | * Return: matching *opp and refreshes *bw accordingly, else returns |
| 745 | * ERR_PTR in case of error and should be handled using IS_ERR. Error return |
| 746 | * values can be: |
| 747 | * EINVAL: for bad pointer |
| 748 | * ERANGE: no match found for search |
| 749 | * ENODEV: if device not found in list of registered devices |
| 750 | * |
| 751 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 752 | * use. |
| 753 | */ |
Viresh Kumar | add1dc0 | 2022-06-02 13:05:45 +0530 | [diff] [blame] | 754 | struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev, unsigned int *bw, |
| 755 | int index) |
Krzysztof Kozlowski | 00ce387 | 2022-05-04 10:17:32 +0200 | [diff] [blame] | 756 | { |
Viresh Kumar | add1dc0 | 2022-06-02 13:05:45 +0530 | [diff] [blame] | 757 | unsigned long temp = *bw; |
| 758 | struct dev_pm_opp *opp; |
Krzysztof Kozlowski | 00ce387 | 2022-05-04 10:17:32 +0200 | [diff] [blame] | 759 | |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 760 | opp = _find_key_ceil(dev, &temp, index, true, _read_bw, NULL); |
Viresh Kumar | add1dc0 | 2022-06-02 13:05:45 +0530 | [diff] [blame] | 761 | *bw = temp; |
Krzysztof Kozlowski | 00ce387 | 2022-05-04 10:17:32 +0200 | [diff] [blame] | 762 | return opp; |
| 763 | } |
| 764 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_bw_ceil); |
| 765 | |
| 766 | /** |
| 767 | * dev_pm_opp_find_bw_floor() - Search for a rounded floor bandwidth |
| 768 | * @dev: device for which we do this operation |
Yang Li | 617df30 | 2022-05-26 21:20:35 +0800 | [diff] [blame] | 769 | * @bw: start bandwidth |
Krzysztof Kozlowski | 00ce387 | 2022-05-04 10:17:32 +0200 | [diff] [blame] | 770 | * @index: which bandwidth to compare, in case of OPPs with several values |
| 771 | * |
| 772 | * Search for the matching floor *available* OPP from a starting bandwidth |
| 773 | * for a device. |
| 774 | * |
| 775 | * Return: matching *opp and refreshes *bw accordingly, else returns |
| 776 | * ERR_PTR in case of error and should be handled using IS_ERR. Error return |
| 777 | * values can be: |
| 778 | * EINVAL: for bad pointer |
| 779 | * ERANGE: no match found for search |
| 780 | * ENODEV: if device not found in list of registered devices |
| 781 | * |
| 782 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 783 | * use. |
| 784 | */ |
| 785 | struct dev_pm_opp *dev_pm_opp_find_bw_floor(struct device *dev, |
| 786 | unsigned int *bw, int index) |
| 787 | { |
Viresh Kumar | add1dc0 | 2022-06-02 13:05:45 +0530 | [diff] [blame] | 788 | unsigned long temp = *bw; |
| 789 | struct dev_pm_opp *opp; |
Krzysztof Kozlowski | 00ce387 | 2022-05-04 10:17:32 +0200 | [diff] [blame] | 790 | |
Viresh Kumar | e10a464 | 2022-06-10 09:40:30 +0530 | [diff] [blame] | 791 | opp = _find_key_floor(dev, &temp, index, true, _read_bw, NULL); |
Viresh Kumar | add1dc0 | 2022-06-02 13:05:45 +0530 | [diff] [blame] | 792 | *bw = temp; |
Krzysztof Kozlowski | 00ce387 | 2022-05-04 10:17:32 +0200 | [diff] [blame] | 793 | return opp; |
| 794 | } |
| 795 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_bw_floor); |
| 796 | |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 797 | static int _set_opp_voltage(struct device *dev, struct regulator *reg, |
Viresh Kumar | ce31781 | 2016-12-01 16:28:18 +0530 | [diff] [blame] | 798 | struct dev_pm_opp_supply *supply) |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 799 | { |
| 800 | int ret; |
| 801 | |
| 802 | /* Regulator not available for device */ |
| 803 | if (IS_ERR(reg)) { |
| 804 | dev_dbg(dev, "%s: regulator not available: %ld\n", __func__, |
| 805 | PTR_ERR(reg)); |
| 806 | return 0; |
| 807 | } |
| 808 | |
Viresh Kumar | ce31781 | 2016-12-01 16:28:18 +0530 | [diff] [blame] | 809 | dev_dbg(dev, "%s: voltages (mV): %lu %lu %lu\n", __func__, |
| 810 | supply->u_volt_min, supply->u_volt, supply->u_volt_max); |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 811 | |
Viresh Kumar | ce31781 | 2016-12-01 16:28:18 +0530 | [diff] [blame] | 812 | ret = regulator_set_voltage_triplet(reg, supply->u_volt_min, |
| 813 | supply->u_volt, supply->u_volt_max); |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 814 | if (ret) |
| 815 | dev_err(dev, "%s: failed to set voltage (%lu %lu %lu mV): %d\n", |
Viresh Kumar | ce31781 | 2016-12-01 16:28:18 +0530 | [diff] [blame] | 816 | __func__, supply->u_volt_min, supply->u_volt, |
| 817 | supply->u_volt_max, ret); |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 818 | |
| 819 | return ret; |
| 820 | } |
| 821 | |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 822 | static int |
| 823 | _opp_config_clk_single(struct device *dev, struct opp_table *opp_table, |
| 824 | struct dev_pm_opp *opp, void *data, bool scaling_down) |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 825 | { |
Viresh Kumar | 1efae8d | 2022-06-03 15:01:30 +0530 | [diff] [blame] | 826 | unsigned long *target = data; |
| 827 | unsigned long freq; |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 828 | int ret; |
| 829 | |
Viresh Kumar | 1efae8d | 2022-06-03 15:01:30 +0530 | [diff] [blame] | 830 | /* One of target and opp must be available */ |
| 831 | if (target) { |
| 832 | freq = *target; |
| 833 | } else if (opp) { |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 834 | freq = opp->rates[0]; |
Viresh Kumar | 1efae8d | 2022-06-03 15:01:30 +0530 | [diff] [blame] | 835 | } else { |
| 836 | WARN_ON(1); |
| 837 | return -EINVAL; |
| 838 | } |
| 839 | |
| 840 | ret = clk_set_rate(opp_table->clk, freq); |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 841 | if (ret) { |
| 842 | dev_err(dev, "%s: failed to set clock rate: %d\n", __func__, |
| 843 | ret); |
Viresh Kumar | 1efae8d | 2022-06-03 15:01:30 +0530 | [diff] [blame] | 844 | } else { |
| 845 | opp_table->rate_clk_single = freq; |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 846 | } |
| 847 | |
| 848 | return ret; |
| 849 | } |
| 850 | |
Viresh Kumar | 8174a3a | 2022-06-10 12:37:25 +0530 | [diff] [blame] | 851 | /* |
| 852 | * Simple implementation for configuring multiple clocks. Configure clocks in |
| 853 | * the order in which they are present in the array while scaling up. |
| 854 | */ |
| 855 | int dev_pm_opp_config_clks_simple(struct device *dev, |
| 856 | struct opp_table *opp_table, struct dev_pm_opp *opp, void *data, |
| 857 | bool scaling_down) |
| 858 | { |
| 859 | int ret, i; |
| 860 | |
| 861 | if (scaling_down) { |
| 862 | for (i = opp_table->clk_count - 1; i >= 0; i--) { |
| 863 | ret = clk_set_rate(opp_table->clks[i], opp->rates[i]); |
| 864 | if (ret) { |
| 865 | dev_err(dev, "%s: failed to set clock rate: %d\n", __func__, |
| 866 | ret); |
| 867 | return ret; |
| 868 | } |
| 869 | } |
| 870 | } else { |
| 871 | for (i = 0; i < opp_table->clk_count; i++) { |
| 872 | ret = clk_set_rate(opp_table->clks[i], opp->rates[i]); |
| 873 | if (ret) { |
| 874 | dev_err(dev, "%s: failed to set clock rate: %d\n", __func__, |
| 875 | ret); |
| 876 | return ret; |
| 877 | } |
| 878 | } |
| 879 | } |
| 880 | |
Christophe JAILLET | d36cb84 | 2022-08-15 14:44:37 +0200 | [diff] [blame] | 881 | return 0; |
Viresh Kumar | 8174a3a | 2022-06-10 12:37:25 +0530 | [diff] [blame] | 882 | } |
| 883 | EXPORT_SYMBOL_GPL(dev_pm_opp_config_clks_simple); |
| 884 | |
Viresh Kumar | c522ce8 | 2022-05-31 12:49:19 +0530 | [diff] [blame] | 885 | static int _opp_config_regulator_single(struct device *dev, |
| 886 | struct dev_pm_opp *old_opp, struct dev_pm_opp *new_opp, |
| 887 | struct regulator **regulators, unsigned int count) |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 888 | { |
Viresh Kumar | c522ce8 | 2022-05-31 12:49:19 +0530 | [diff] [blame] | 889 | struct regulator *reg = regulators[0]; |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 890 | int ret; |
| 891 | |
| 892 | /* This function only supports single regulator per device */ |
Viresh Kumar | c522ce8 | 2022-05-31 12:49:19 +0530 | [diff] [blame] | 893 | if (WARN_ON(count > 1)) { |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 894 | dev_err(dev, "multiple regulators are not supported\n"); |
| 895 | return -EINVAL; |
| 896 | } |
| 897 | |
Viresh Kumar | c522ce8 | 2022-05-31 12:49:19 +0530 | [diff] [blame] | 898 | ret = _set_opp_voltage(dev, reg, new_opp->supplies); |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 899 | if (ret) |
Viresh Kumar | c522ce8 | 2022-05-31 12:49:19 +0530 | [diff] [blame] | 900 | return ret; |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 901 | |
Kamil Konieczny | 8d45719 | 2019-07-19 17:05:32 +0200 | [diff] [blame] | 902 | /* |
| 903 | * Enable the regulator after setting its voltages, otherwise it breaks |
| 904 | * some boot-enabled regulators. |
| 905 | */ |
Viresh Kumar | c522ce8 | 2022-05-31 12:49:19 +0530 | [diff] [blame] | 906 | if (unlikely(!new_opp->opp_table->enabled)) { |
Kamil Konieczny | 8d45719 | 2019-07-19 17:05:32 +0200 | [diff] [blame] | 907 | ret = regulator_enable(reg); |
| 908 | if (ret < 0) |
| 909 | dev_warn(dev, "Failed to enable regulator: %d", ret); |
Kamil Konieczny | 8d45719 | 2019-07-19 17:05:32 +0200 | [diff] [blame] | 910 | } |
| 911 | |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 912 | return 0; |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 913 | } |
| 914 | |
Viresh Kumar | b00e667 | 2020-05-27 09:33:44 +0530 | [diff] [blame] | 915 | static int _set_opp_bw(const struct opp_table *opp_table, |
Viresh Kumar | 240ae50 | 2021-01-21 15:27:55 +0530 | [diff] [blame] | 916 | struct dev_pm_opp *opp, struct device *dev) |
Viresh Kumar | b00e667 | 2020-05-27 09:33:44 +0530 | [diff] [blame] | 917 | { |
| 918 | u32 avg, peak; |
| 919 | int i, ret; |
| 920 | |
| 921 | if (!opp_table->paths) |
| 922 | return 0; |
| 923 | |
| 924 | for (i = 0; i < opp_table->path_count; i++) { |
Viresh Kumar | 240ae50 | 2021-01-21 15:27:55 +0530 | [diff] [blame] | 925 | if (!opp) { |
Viresh Kumar | b00e667 | 2020-05-27 09:33:44 +0530 | [diff] [blame] | 926 | avg = 0; |
| 927 | peak = 0; |
| 928 | } else { |
| 929 | avg = opp->bandwidth[i].avg; |
| 930 | peak = opp->bandwidth[i].peak; |
| 931 | } |
| 932 | ret = icc_set_bw(opp_table->paths[i], avg, peak); |
| 933 | if (ret) { |
| 934 | dev_err(dev, "Failed to %s bandwidth[%d]: %d\n", |
Viresh Kumar | 240ae50 | 2021-01-21 15:27:55 +0530 | [diff] [blame] | 935 | opp ? "set" : "remove", i, ret); |
Viresh Kumar | b00e667 | 2020-05-27 09:33:44 +0530 | [diff] [blame] | 936 | return ret; |
| 937 | } |
| 938 | } |
| 939 | |
| 940 | return 0; |
| 941 | } |
| 942 | |
Viresh Kumar | 528f2d8 | 2023-02-22 16:36:38 +0530 | [diff] [blame] | 943 | static int _set_performance_state(struct device *dev, struct device *pd_dev, |
| 944 | struct dev_pm_opp *opp, int i) |
Stephan Gerhold | 60cdeae | 2020-07-30 10:01:44 +0200 | [diff] [blame] | 945 | { |
Viresh Kumar | 7c41cdc | 2023-06-14 15:29:32 +0530 | [diff] [blame] | 946 | unsigned int pstate = likely(opp) ? opp->required_opps[i]->level: 0; |
Stephan Gerhold | 60cdeae | 2020-07-30 10:01:44 +0200 | [diff] [blame] | 947 | int ret; |
| 948 | |
| 949 | if (!pd_dev) |
| 950 | return 0; |
| 951 | |
| 952 | ret = dev_pm_genpd_set_performance_state(pd_dev, pstate); |
| 953 | if (ret) { |
Viresh Kumar | 9bfb1ff | 2022-06-03 15:27:55 +0530 | [diff] [blame] | 954 | dev_err(dev, "Failed to set performance state of %s: %d (%d)\n", |
Stephan Gerhold | 60cdeae | 2020-07-30 10:01:44 +0200 | [diff] [blame] | 955 | dev_name(pd_dev), pstate, ret); |
| 956 | } |
| 957 | |
| 958 | return ret; |
| 959 | } |
| 960 | |
Viresh Kumar | 528f2d8 | 2023-02-22 16:36:38 +0530 | [diff] [blame] | 961 | static int _opp_set_required_opps_generic(struct device *dev, |
| 962 | struct opp_table *opp_table, struct dev_pm_opp *opp, bool scaling_down) |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 963 | { |
Viresh Kumar | 528f2d8 | 2023-02-22 16:36:38 +0530 | [diff] [blame] | 964 | dev_err(dev, "setting required-opps isn't supported for non-genpd devices\n"); |
| 965 | return -ENOENT; |
| 966 | } |
| 967 | |
| 968 | static int _opp_set_required_opps_genpd(struct device *dev, |
| 969 | struct opp_table *opp_table, struct dev_pm_opp *opp, bool scaling_down) |
| 970 | { |
Viresh Kumar | 29b1a92 | 2023-02-22 16:36:37 +0530 | [diff] [blame] | 971 | struct device **genpd_virt_devs = |
| 972 | opp_table->genpd_virt_devs ? opp_table->genpd_virt_devs : &dev; |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 973 | int i, ret = 0; |
| 974 | |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 975 | /* |
| 976 | * Acquire genpd_virt_dev_lock to make sure we don't use a genpd_dev |
| 977 | * after it is freed from another thread. |
| 978 | */ |
| 979 | mutex_lock(&opp_table->genpd_virt_dev_lock); |
| 980 | |
Stephan Gerhold | 2c59138 | 2020-07-30 10:01:45 +0200 | [diff] [blame] | 981 | /* Scaling up? Set required OPPs in normal order, else reverse */ |
Viresh Kumar | 528f2d8 | 2023-02-22 16:36:38 +0530 | [diff] [blame] | 982 | if (!scaling_down) { |
Stephan Gerhold | 2c59138 | 2020-07-30 10:01:45 +0200 | [diff] [blame] | 983 | for (i = 0; i < opp_table->required_opp_count; i++) { |
Viresh Kumar | 528f2d8 | 2023-02-22 16:36:38 +0530 | [diff] [blame] | 984 | ret = _set_performance_state(dev, genpd_virt_devs[i], opp, i); |
Stephan Gerhold | 2c59138 | 2020-07-30 10:01:45 +0200 | [diff] [blame] | 985 | if (ret) |
| 986 | break; |
| 987 | } |
| 988 | } else { |
| 989 | for (i = opp_table->required_opp_count - 1; i >= 0; i--) { |
Viresh Kumar | 528f2d8 | 2023-02-22 16:36:38 +0530 | [diff] [blame] | 990 | ret = _set_performance_state(dev, genpd_virt_devs[i], opp, i); |
Stephan Gerhold | 2c59138 | 2020-07-30 10:01:45 +0200 | [diff] [blame] | 991 | if (ret) |
| 992 | break; |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 993 | } |
| 994 | } |
Stephan Gerhold | 2c59138 | 2020-07-30 10:01:45 +0200 | [diff] [blame] | 995 | |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 996 | mutex_unlock(&opp_table->genpd_virt_dev_lock); |
| 997 | |
| 998 | return ret; |
| 999 | } |
| 1000 | |
Viresh Kumar | 528f2d8 | 2023-02-22 16:36:38 +0530 | [diff] [blame] | 1001 | /* This is only called for PM domain for now */ |
| 1002 | static int _set_required_opps(struct device *dev, struct opp_table *opp_table, |
| 1003 | struct dev_pm_opp *opp, bool up) |
| 1004 | { |
| 1005 | /* required-opps not fully initialized yet */ |
| 1006 | if (lazy_linking_pending(opp_table)) |
| 1007 | return -EBUSY; |
| 1008 | |
| 1009 | if (opp_table->set_required_opps) |
| 1010 | return opp_table->set_required_opps(dev, opp_table, opp, up); |
| 1011 | |
| 1012 | return 0; |
| 1013 | } |
| 1014 | |
| 1015 | /* Update set_required_opps handler */ |
| 1016 | void _update_set_required_opps(struct opp_table *opp_table) |
| 1017 | { |
| 1018 | /* Already set */ |
| 1019 | if (opp_table->set_required_opps) |
| 1020 | return; |
| 1021 | |
| 1022 | /* All required OPPs will belong to genpd or none */ |
| 1023 | if (opp_table->required_opp_tables[0]->is_genpd) |
| 1024 | opp_table->set_required_opps = _opp_set_required_opps_genpd; |
| 1025 | else |
| 1026 | opp_table->set_required_opps = _opp_set_required_opps_generic; |
| 1027 | } |
| 1028 | |
Viresh Kumar | 81c4d8a | 2021-01-20 16:16:48 +0530 | [diff] [blame] | 1029 | static void _find_current_opp(struct device *dev, struct opp_table *opp_table) |
| 1030 | { |
| 1031 | struct dev_pm_opp *opp = ERR_PTR(-ENODEV); |
| 1032 | unsigned long freq; |
| 1033 | |
| 1034 | if (!IS_ERR(opp_table->clk)) { |
| 1035 | freq = clk_get_rate(opp_table->clk); |
| 1036 | opp = _find_freq_ceil(opp_table, &freq); |
| 1037 | } |
| 1038 | |
| 1039 | /* |
| 1040 | * Unable to find the current OPP ? Pick the first from the list since |
| 1041 | * it is in ascending order, otherwise rest of the code will need to |
| 1042 | * make special checks to validate current_opp. |
| 1043 | */ |
| 1044 | if (IS_ERR(opp)) { |
| 1045 | mutex_lock(&opp_table->lock); |
| 1046 | opp = list_first_entry(&opp_table->opp_list, struct dev_pm_opp, node); |
| 1047 | dev_pm_opp_get(opp); |
| 1048 | mutex_unlock(&opp_table->lock); |
| 1049 | } |
| 1050 | |
| 1051 | opp_table->current_opp = opp; |
| 1052 | } |
| 1053 | |
Viresh Kumar | 5ad58bb | 2021-01-21 12:08:45 +0530 | [diff] [blame] | 1054 | static int _disable_opp_table(struct device *dev, struct opp_table *opp_table) |
Viresh Kumar | f3364e1 | 2020-08-13 09:48:04 +0530 | [diff] [blame] | 1055 | { |
| 1056 | int ret; |
| 1057 | |
| 1058 | if (!opp_table->enabled) |
| 1059 | return 0; |
| 1060 | |
| 1061 | /* |
| 1062 | * Some drivers need to support cases where some platforms may |
| 1063 | * have OPP table for the device, while others don't and |
| 1064 | * opp_set_rate() just needs to behave like clk_set_rate(). |
| 1065 | */ |
| 1066 | if (!_get_opp_count(opp_table)) |
| 1067 | return 0; |
| 1068 | |
Viresh Kumar | 240ae50 | 2021-01-21 15:27:55 +0530 | [diff] [blame] | 1069 | ret = _set_opp_bw(opp_table, NULL, dev); |
Viresh Kumar | f3364e1 | 2020-08-13 09:48:04 +0530 | [diff] [blame] | 1070 | if (ret) |
| 1071 | return ret; |
| 1072 | |
| 1073 | if (opp_table->regulators) |
| 1074 | regulator_disable(opp_table->regulators[0]); |
| 1075 | |
Stephan Gerhold | 2c59138 | 2020-07-30 10:01:45 +0200 | [diff] [blame] | 1076 | ret = _set_required_opps(dev, opp_table, NULL, false); |
Viresh Kumar | f3364e1 | 2020-08-13 09:48:04 +0530 | [diff] [blame] | 1077 | |
| 1078 | opp_table->enabled = false; |
| 1079 | return ret; |
| 1080 | } |
| 1081 | |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 1082 | static int _set_opp(struct device *dev, struct opp_table *opp_table, |
Viresh Kumar | 1efae8d | 2022-06-03 15:01:30 +0530 | [diff] [blame] | 1083 | struct dev_pm_opp *opp, void *clk_data, bool forced) |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 1084 | { |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 1085 | struct dev_pm_opp *old_opp; |
Viresh Kumar | f0b88fa4 | 2021-01-21 16:00:12 +0530 | [diff] [blame] | 1086 | int scaling_down, ret; |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 1087 | |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 1088 | if (unlikely(!opp)) |
| 1089 | return _disable_opp_table(dev, opp_table); |
Rajendra Nayak | aca48b6 | 2020-04-08 19:16:27 +0530 | [diff] [blame] | 1090 | |
Viresh Kumar | 81c4d8a | 2021-01-20 16:16:48 +0530 | [diff] [blame] | 1091 | /* Find the currently set OPP if we don't know already */ |
| 1092 | if (unlikely(!opp_table->current_opp)) |
| 1093 | _find_current_opp(dev, opp_table); |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 1094 | |
Viresh Kumar | 81c4d8a | 2021-01-20 16:16:48 +0530 | [diff] [blame] | 1095 | old_opp = opp_table->current_opp; |
Viresh Kumar | 81c4d8a | 2021-01-20 16:16:48 +0530 | [diff] [blame] | 1096 | |
| 1097 | /* Return early if nothing to do */ |
Viresh Kumar | 1efae8d | 2022-06-03 15:01:30 +0530 | [diff] [blame] | 1098 | if (!forced && old_opp == opp && opp_table->enabled) { |
Adrián Larumbe | 9e28f7a | 2023-05-20 18:00:35 +0100 | [diff] [blame] | 1099 | dev_dbg_ratelimited(dev, "%s: OPPs are same, nothing to do\n", __func__); |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 1100 | return 0; |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 1101 | } |
| 1102 | |
Viresh Kumar | f0b88fa4 | 2021-01-21 16:00:12 +0530 | [diff] [blame] | 1103 | dev_dbg(dev, "%s: switching OPP: Freq %lu -> %lu Hz, Level %u -> %u, Bw %u -> %u\n", |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1104 | __func__, old_opp->rates[0], opp->rates[0], old_opp->level, |
| 1105 | opp->level, old_opp->bandwidth ? old_opp->bandwidth[0].peak : 0, |
Viresh Kumar | f0b88fa4 | 2021-01-21 16:00:12 +0530 | [diff] [blame] | 1106 | opp->bandwidth ? opp->bandwidth[0].peak : 0); |
| 1107 | |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1108 | scaling_down = _opp_compare_key(opp_table, old_opp, opp); |
Viresh Kumar | f0b88fa4 | 2021-01-21 16:00:12 +0530 | [diff] [blame] | 1109 | if (scaling_down == -1) |
| 1110 | scaling_down = 0; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1111 | |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 1112 | /* Scaling up? Configure required OPPs before frequency */ |
Viresh Kumar | f0b88fa4 | 2021-01-21 16:00:12 +0530 | [diff] [blame] | 1113 | if (!scaling_down) { |
Stephan Gerhold | 2c59138 | 2020-07-30 10:01:45 +0200 | [diff] [blame] | 1114 | ret = _set_required_opps(dev, opp_table, opp, true); |
Viresh Kumar | 870d5d9 | 2021-01-28 15:30:00 +0530 | [diff] [blame] | 1115 | if (ret) { |
| 1116 | dev_err(dev, "Failed to set required opps: %d\n", ret); |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 1117 | return ret; |
Viresh Kumar | 870d5d9 | 2021-01-28 15:30:00 +0530 | [diff] [blame] | 1118 | } |
| 1119 | |
| 1120 | ret = _set_opp_bw(opp_table, opp, dev); |
| 1121 | if (ret) { |
| 1122 | dev_err(dev, "Failed to set bw: %d\n", ret); |
| 1123 | return ret; |
| 1124 | } |
Viresh Kumar | aee3352 | 2022-07-04 13:45:08 +0530 | [diff] [blame] | 1125 | |
| 1126 | if (opp_table->config_regulators) { |
| 1127 | ret = opp_table->config_regulators(dev, old_opp, opp, |
| 1128 | opp_table->regulators, |
| 1129 | opp_table->regulator_count); |
| 1130 | if (ret) { |
| 1131 | dev_err(dev, "Failed to set regulator voltages: %d\n", |
| 1132 | ret); |
| 1133 | return ret; |
| 1134 | } |
| 1135 | } |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 1136 | } |
| 1137 | |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1138 | if (opp_table->config_clks) { |
| 1139 | ret = opp_table->config_clks(dev, opp_table, opp, clk_data, scaling_down); |
| 1140 | if (ret) |
| 1141 | return ret; |
| 1142 | } |
Viresh Kumar | 870d5d9 | 2021-01-28 15:30:00 +0530 | [diff] [blame] | 1143 | |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 1144 | /* Scaling down? Configure required OPPs after frequency */ |
Viresh Kumar | 870d5d9 | 2021-01-28 15:30:00 +0530 | [diff] [blame] | 1145 | if (scaling_down) { |
Viresh Kumar | aee3352 | 2022-07-04 13:45:08 +0530 | [diff] [blame] | 1146 | if (opp_table->config_regulators) { |
| 1147 | ret = opp_table->config_regulators(dev, old_opp, opp, |
| 1148 | opp_table->regulators, |
| 1149 | opp_table->regulator_count); |
| 1150 | if (ret) { |
| 1151 | dev_err(dev, "Failed to set regulator voltages: %d\n", |
| 1152 | ret); |
| 1153 | return ret; |
| 1154 | } |
| 1155 | } |
| 1156 | |
Viresh Kumar | 240ae50 | 2021-01-21 15:27:55 +0530 | [diff] [blame] | 1157 | ret = _set_opp_bw(opp_table, opp, dev); |
Viresh Kumar | 870d5d9 | 2021-01-28 15:30:00 +0530 | [diff] [blame] | 1158 | if (ret) { |
| 1159 | dev_err(dev, "Failed to set bw: %d\n", ret); |
| 1160 | return ret; |
| 1161 | } |
Viresh Kumar | 81c4d8a | 2021-01-20 16:16:48 +0530 | [diff] [blame] | 1162 | |
Viresh Kumar | 870d5d9 | 2021-01-28 15:30:00 +0530 | [diff] [blame] | 1163 | ret = _set_required_opps(dev, opp_table, opp, false); |
| 1164 | if (ret) { |
| 1165 | dev_err(dev, "Failed to set required opps: %d\n", ret); |
| 1166 | return ret; |
Viresh Kumar | 81c4d8a | 2021-01-20 16:16:48 +0530 | [diff] [blame] | 1167 | } |
Viresh Kumar | 72f80ce | 2020-08-13 08:38:37 +0530 | [diff] [blame] | 1168 | } |
Georgi Djakov | fe2af40 | 2020-05-12 15:53:23 +0300 | [diff] [blame] | 1169 | |
Viresh Kumar | 870d5d9 | 2021-01-28 15:30:00 +0530 | [diff] [blame] | 1170 | opp_table->enabled = true; |
| 1171 | dev_pm_opp_put(old_opp); |
| 1172 | |
| 1173 | /* Make sure current_opp doesn't get freed */ |
| 1174 | dev_pm_opp_get(opp); |
| 1175 | opp_table->current_opp = opp; |
| 1176 | |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 1177 | return ret; |
| 1178 | } |
| 1179 | |
| 1180 | /** |
| 1181 | * dev_pm_opp_set_rate() - Configure new OPP based on frequency |
| 1182 | * @dev: device for which we do this operation |
| 1183 | * @target_freq: frequency to achieve |
| 1184 | * |
| 1185 | * This configures the power-supplies to the levels specified by the OPP |
| 1186 | * corresponding to the target_freq, and programs the clock to a value <= |
| 1187 | * target_freq, as rounded by clk_round_rate(). Device wanting to run at fmax |
| 1188 | * provided by the opp, should have already rounded to the target OPP's |
| 1189 | * frequency. |
| 1190 | */ |
| 1191 | int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) |
| 1192 | { |
| 1193 | struct opp_table *opp_table; |
| 1194 | unsigned long freq = 0, temp_freq; |
| 1195 | struct dev_pm_opp *opp = NULL; |
Viresh Kumar | 1efae8d | 2022-06-03 15:01:30 +0530 | [diff] [blame] | 1196 | bool forced = false; |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 1197 | int ret; |
| 1198 | |
| 1199 | opp_table = _find_opp_table(dev); |
| 1200 | if (IS_ERR(opp_table)) { |
| 1201 | dev_err(dev, "%s: device's opp table doesn't exist\n", __func__); |
| 1202 | return PTR_ERR(opp_table); |
| 1203 | } |
| 1204 | |
| 1205 | if (target_freq) { |
| 1206 | /* |
| 1207 | * For IO devices which require an OPP on some platforms/SoCs |
| 1208 | * while just needing to scale the clock on some others |
| 1209 | * we look for empty OPP tables with just a clock handle and |
| 1210 | * scale only the clk. This makes dev_pm_opp_set_rate() |
| 1211 | * equivalent to a clk_set_rate() |
| 1212 | */ |
| 1213 | if (!_get_opp_count(opp_table)) { |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1214 | ret = opp_table->config_clks(dev, opp_table, NULL, |
| 1215 | &target_freq, false); |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 1216 | goto put_opp_table; |
| 1217 | } |
| 1218 | |
| 1219 | freq = clk_round_rate(opp_table->clk, target_freq); |
| 1220 | if ((long)freq <= 0) |
| 1221 | freq = target_freq; |
| 1222 | |
| 1223 | /* |
| 1224 | * The clock driver may support finer resolution of the |
| 1225 | * frequencies than the OPP table, don't update the frequency we |
| 1226 | * pass to clk_set_rate() here. |
| 1227 | */ |
| 1228 | temp_freq = freq; |
| 1229 | opp = _find_freq_ceil(opp_table, &temp_freq); |
| 1230 | if (IS_ERR(opp)) { |
| 1231 | ret = PTR_ERR(opp); |
| 1232 | dev_err(dev, "%s: failed to find OPP for freq %lu (%d)\n", |
| 1233 | __func__, freq, ret); |
| 1234 | goto put_opp_table; |
| 1235 | } |
Viresh Kumar | 1efae8d | 2022-06-03 15:01:30 +0530 | [diff] [blame] | 1236 | |
| 1237 | /* |
| 1238 | * An OPP entry specifies the highest frequency at which other |
| 1239 | * properties of the OPP entry apply. Even if the new OPP is |
| 1240 | * same as the old one, we may still reach here for a different |
| 1241 | * value of the frequency. In such a case, do not abort but |
| 1242 | * configure the hardware to the desired frequency forcefully. |
| 1243 | */ |
| 1244 | forced = opp_table->rate_clk_single != target_freq; |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 1245 | } |
| 1246 | |
Viresh Kumar | 1efae8d | 2022-06-03 15:01:30 +0530 | [diff] [blame] | 1247 | ret = _set_opp(dev, opp_table, opp, &target_freq, forced); |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 1248 | |
| 1249 | if (target_freq) |
| 1250 | dev_pm_opp_put(opp); |
Viresh Kumar | 1efae8d | 2022-06-03 15:01:30 +0530 | [diff] [blame] | 1251 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1252 | put_opp_table: |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1253 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1254 | return ret; |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 1255 | } |
| 1256 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_rate); |
| 1257 | |
Viresh Kumar | abbe348 | 2021-01-21 12:15:36 +0530 | [diff] [blame] | 1258 | /** |
| 1259 | * dev_pm_opp_set_opp() - Configure device for OPP |
| 1260 | * @dev: device for which we do this operation |
| 1261 | * @opp: OPP to set to |
| 1262 | * |
| 1263 | * This configures the device based on the properties of the OPP passed to this |
| 1264 | * routine. |
| 1265 | * |
| 1266 | * Return: 0 on success, a negative error number otherwise. |
| 1267 | */ |
| 1268 | int dev_pm_opp_set_opp(struct device *dev, struct dev_pm_opp *opp) |
| 1269 | { |
| 1270 | struct opp_table *opp_table; |
| 1271 | int ret; |
| 1272 | |
| 1273 | opp_table = _find_opp_table(dev); |
| 1274 | if (IS_ERR(opp_table)) { |
| 1275 | dev_err(dev, "%s: device opp doesn't exist\n", __func__); |
| 1276 | return PTR_ERR(opp_table); |
| 1277 | } |
| 1278 | |
Viresh Kumar | 1efae8d | 2022-06-03 15:01:30 +0530 | [diff] [blame] | 1279 | ret = _set_opp(dev, opp_table, opp, NULL, false); |
Viresh Kumar | abbe348 | 2021-01-21 12:15:36 +0530 | [diff] [blame] | 1280 | dev_pm_opp_put_opp_table(opp_table); |
| 1281 | |
| 1282 | return ret; |
| 1283 | } |
| 1284 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_opp); |
| 1285 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1286 | /* OPP-dev Helpers */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1287 | static void _remove_opp_dev(struct opp_device *opp_dev, |
| 1288 | struct opp_table *opp_table) |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1289 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1290 | opp_debug_unregister(opp_dev, opp_table); |
| 1291 | list_del(&opp_dev->node); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1292 | kfree(opp_dev); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1293 | } |
| 1294 | |
Viresh Kumar | ef43f01 | 2020-10-22 12:12:27 +0530 | [diff] [blame] | 1295 | struct opp_device *_add_opp_dev(const struct device *dev, |
| 1296 | struct opp_table *opp_table) |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1297 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1298 | struct opp_device *opp_dev; |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1299 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1300 | opp_dev = kzalloc(sizeof(*opp_dev), GFP_KERNEL); |
| 1301 | if (!opp_dev) |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1302 | return NULL; |
| 1303 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1304 | /* Initialize opp-dev */ |
| 1305 | opp_dev->dev = dev; |
Viresh Kumar | 3d25569 | 2018-08-03 07:05:21 +0530 | [diff] [blame] | 1306 | |
Viresh Kumar | ef43f01 | 2020-10-22 12:12:27 +0530 | [diff] [blame] | 1307 | mutex_lock(&opp_table->lock); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1308 | list_add(&opp_dev->node, &opp_table->dev_list); |
Viresh Kumar | ef43f01 | 2020-10-22 12:12:27 +0530 | [diff] [blame] | 1309 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1310 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1311 | /* Create debugfs entries for the opp_table */ |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 1312 | opp_debug_register(opp_dev, opp_table); |
Viresh Kumar | 283d55e | 2018-09-07 09:01:54 +0530 | [diff] [blame] | 1313 | |
| 1314 | return opp_dev; |
| 1315 | } |
| 1316 | |
Viresh Kumar | eb7c8743 | 2018-09-05 16:17:14 +0530 | [diff] [blame] | 1317 | static struct opp_table *_allocate_opp_table(struct device *dev, int index) |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 1318 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1319 | struct opp_table *opp_table; |
| 1320 | struct opp_device *opp_dev; |
Viresh Kumar | d54974c | 2016-02-09 10:30:38 +0530 | [diff] [blame] | 1321 | int ret; |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 1322 | |
| 1323 | /* |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1324 | * Allocate a new OPP table. In the infrequent case where a new |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 1325 | * device is needed to be added, we pay this penalty. |
| 1326 | */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1327 | opp_table = kzalloc(sizeof(*opp_table), GFP_KERNEL); |
| 1328 | if (!opp_table) |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1329 | return ERR_PTR(-ENOMEM); |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 1330 | |
Viresh Kumar | 3d25569 | 2018-08-03 07:05:21 +0530 | [diff] [blame] | 1331 | mutex_init(&opp_table->lock); |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 1332 | mutex_init(&opp_table->genpd_virt_dev_lock); |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1333 | INIT_LIST_HEAD(&opp_table->dev_list); |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 1334 | INIT_LIST_HEAD(&opp_table->lazy); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1335 | |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1336 | opp_table->clk = ERR_PTR(-ENODEV); |
| 1337 | |
Viresh Kumar | 46f48ac | 2018-12-11 16:39:36 +0530 | [diff] [blame] | 1338 | /* Mark regulator count uninitialized */ |
| 1339 | opp_table->regulator_count = -1; |
| 1340 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1341 | opp_dev = _add_opp_dev(dev, opp_table); |
| 1342 | if (!opp_dev) { |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1343 | ret = -ENOMEM; |
| 1344 | goto err; |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1345 | } |
| 1346 | |
Viresh Kumar | eb7c8743 | 2018-09-05 16:17:14 +0530 | [diff] [blame] | 1347 | _of_init_opp_table(opp_table, dev, index); |
Viresh Kumar | 50f8cfb | 2016-02-09 10:30:37 +0530 | [diff] [blame] | 1348 | |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1349 | /* Find interconnect path(s) for the device */ |
| 1350 | ret = dev_pm_opp_of_find_icc_paths(dev, opp_table); |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1351 | if (ret) { |
| 1352 | if (ret == -EPROBE_DEFER) |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1353 | goto remove_opp_dev; |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1354 | |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1355 | dev_warn(dev, "%s: Error finding interconnect paths: %d\n", |
| 1356 | __func__, ret); |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1357 | } |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1358 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1359 | BLOCKING_INIT_NOTIFIER_HEAD(&opp_table->head); |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1360 | INIT_LIST_HEAD(&opp_table->opp_list); |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1361 | kref_init(&opp_table->kref); |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 1362 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1363 | return opp_table; |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1364 | |
Quanyang Wang | 976509b | 2020-12-24 18:49:27 +0800 | [diff] [blame] | 1365 | remove_opp_dev: |
Stephan Gerhold | b2a2ab0 | 2023-05-30 17:54:46 +0200 | [diff] [blame] | 1366 | _of_clear_opp_table(opp_table); |
Quanyang Wang | 976509b | 2020-12-24 18:49:27 +0800 | [diff] [blame] | 1367 | _remove_opp_dev(opp_dev, opp_table); |
Stephan Gerhold | b2a2ab0 | 2023-05-30 17:54:46 +0200 | [diff] [blame] | 1368 | mutex_destroy(&opp_table->genpd_virt_dev_lock); |
| 1369 | mutex_destroy(&opp_table->lock); |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1370 | err: |
| 1371 | kfree(opp_table); |
| 1372 | return ERR_PTR(ret); |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 1373 | } |
| 1374 | |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1375 | void _get_opp_table_kref(struct opp_table *opp_table) |
Viresh Kumar | 3bac42c | 2015-07-29 16:22:59 +0530 | [diff] [blame] | 1376 | { |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1377 | kref_get(&opp_table->kref); |
| 1378 | } |
| 1379 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1380 | static struct opp_table *_update_opp_table_clk(struct device *dev, |
| 1381 | struct opp_table *opp_table, |
| 1382 | bool getclk) |
| 1383 | { |
Viresh Kumar | d4a4c7a | 2021-01-29 16:12:04 +0530 | [diff] [blame] | 1384 | int ret; |
| 1385 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1386 | /* |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1387 | * Return early if we don't need to get clk or we have already done it |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1388 | * earlier. |
| 1389 | */ |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1390 | if (!getclk || IS_ERR(opp_table) || !IS_ERR(opp_table->clk) || |
| 1391 | opp_table->clks) |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1392 | return opp_table; |
| 1393 | |
| 1394 | /* Find clk for the device */ |
| 1395 | opp_table->clk = clk_get(dev, NULL); |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1396 | |
Viresh Kumar | d4a4c7a | 2021-01-29 16:12:04 +0530 | [diff] [blame] | 1397 | ret = PTR_ERR_OR_ZERO(opp_table->clk); |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1398 | if (!ret) { |
| 1399 | opp_table->config_clks = _opp_config_clk_single; |
| 1400 | opp_table->clk_count = 1; |
Viresh Kumar | d4a4c7a | 2021-01-29 16:12:04 +0530 | [diff] [blame] | 1401 | return opp_table; |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1402 | } |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1403 | |
Viresh Kumar | d4a4c7a | 2021-01-29 16:12:04 +0530 | [diff] [blame] | 1404 | if (ret == -ENOENT) { |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1405 | /* |
| 1406 | * There are few platforms which don't want the OPP core to |
| 1407 | * manage device's clock settings. In such cases neither the |
| 1408 | * platform provides the clks explicitly to us, nor the DT |
| 1409 | * contains a valid clk entry. The OPP nodes in DT may still |
| 1410 | * contain "opp-hz" property though, which we need to parse and |
| 1411 | * allow the platform to find an OPP based on freq later on. |
| 1412 | * |
| 1413 | * This is a simple solution to take care of such corner cases, |
| 1414 | * i.e. make the clk_count 1, which lets us allocate space for |
| 1415 | * frequency in opp->rates and also parse the entries in DT. |
| 1416 | */ |
| 1417 | opp_table->clk_count = 1; |
| 1418 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1419 | dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__, ret); |
Viresh Kumar | d4a4c7a | 2021-01-29 16:12:04 +0530 | [diff] [blame] | 1420 | return opp_table; |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1421 | } |
| 1422 | |
Viresh Kumar | d4a4c7a | 2021-01-29 16:12:04 +0530 | [diff] [blame] | 1423 | dev_pm_opp_put_opp_table(opp_table); |
| 1424 | dev_err_probe(dev, ret, "Couldn't find clock\n"); |
| 1425 | |
| 1426 | return ERR_PTR(ret); |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1427 | } |
| 1428 | |
Viresh Kumar | 27c0948 | 2020-10-27 16:53:21 +0530 | [diff] [blame] | 1429 | /* |
| 1430 | * We need to make sure that the OPP table for a device doesn't get added twice, |
| 1431 | * if this routine gets called in parallel with the same device pointer. |
| 1432 | * |
| 1433 | * The simplest way to enforce that is to perform everything (find existing |
| 1434 | * table and if not found, create a new one) under the opp_table_lock, so only |
| 1435 | * one creator gets access to the same. But that expands the critical section |
| 1436 | * under the lock and may end up causing circular dependencies with frameworks |
| 1437 | * like debugfs, interconnect or clock framework as they may be direct or |
| 1438 | * indirect users of OPP core. |
| 1439 | * |
| 1440 | * And for that reason we have to go for a bit tricky implementation here, which |
| 1441 | * uses the opp_tables_busy flag to indicate if another creator is in the middle |
| 1442 | * of adding an OPP table and others should wait for it to finish. |
| 1443 | */ |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1444 | struct opp_table *_add_opp_table_indexed(struct device *dev, int index, |
| 1445 | bool getclk) |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1446 | { |
| 1447 | struct opp_table *opp_table; |
| 1448 | |
Viresh Kumar | 27c0948 | 2020-10-27 16:53:21 +0530 | [diff] [blame] | 1449 | again: |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1450 | mutex_lock(&opp_table_lock); |
| 1451 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1452 | opp_table = _find_opp_table_unlocked(dev); |
| 1453 | if (!IS_ERR(opp_table)) |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1454 | goto unlock; |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1455 | |
Viresh Kumar | 27c0948 | 2020-10-27 16:53:21 +0530 | [diff] [blame] | 1456 | /* |
| 1457 | * The opp_tables list or an OPP table's dev_list is getting updated by |
| 1458 | * another user, wait for it to finish. |
| 1459 | */ |
| 1460 | if (unlikely(opp_tables_busy)) { |
| 1461 | mutex_unlock(&opp_table_lock); |
| 1462 | cpu_relax(); |
| 1463 | goto again; |
| 1464 | } |
| 1465 | |
| 1466 | opp_tables_busy = true; |
Viresh Kumar | 283d55e | 2018-09-07 09:01:54 +0530 | [diff] [blame] | 1467 | opp_table = _managed_opp(dev, index); |
Viresh Kumar | 27c0948 | 2020-10-27 16:53:21 +0530 | [diff] [blame] | 1468 | |
| 1469 | /* Drop the lock to reduce the size of critical section */ |
| 1470 | mutex_unlock(&opp_table_lock); |
| 1471 | |
Viresh Kumar | 283d55e | 2018-09-07 09:01:54 +0530 | [diff] [blame] | 1472 | if (opp_table) { |
Viresh Kumar | ef43f01 | 2020-10-22 12:12:27 +0530 | [diff] [blame] | 1473 | if (!_add_opp_dev(dev, opp_table)) { |
Viresh Kumar | 283d55e | 2018-09-07 09:01:54 +0530 | [diff] [blame] | 1474 | dev_pm_opp_put_opp_table(opp_table); |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1475 | opp_table = ERR_PTR(-ENOMEM); |
Viresh Kumar | 283d55e | 2018-09-07 09:01:54 +0530 | [diff] [blame] | 1476 | } |
Viresh Kumar | 27c0948 | 2020-10-27 16:53:21 +0530 | [diff] [blame] | 1477 | |
| 1478 | mutex_lock(&opp_table_lock); |
| 1479 | } else { |
| 1480 | opp_table = _allocate_opp_table(dev, index); |
| 1481 | |
| 1482 | mutex_lock(&opp_table_lock); |
| 1483 | if (!IS_ERR(opp_table)) |
| 1484 | list_add(&opp_table->node, &opp_tables); |
Viresh Kumar | 283d55e | 2018-09-07 09:01:54 +0530 | [diff] [blame] | 1485 | } |
| 1486 | |
Viresh Kumar | 27c0948 | 2020-10-27 16:53:21 +0530 | [diff] [blame] | 1487 | opp_tables_busy = false; |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1488 | |
| 1489 | unlock: |
| 1490 | mutex_unlock(&opp_table_lock); |
| 1491 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1492 | return _update_opp_table_clk(dev, opp_table, getclk); |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1493 | } |
Viresh Kumar | eb7c8743 | 2018-09-05 16:17:14 +0530 | [diff] [blame] | 1494 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1495 | static struct opp_table *_add_opp_table(struct device *dev, bool getclk) |
Viresh Kumar | e77dcb0 | 2020-11-06 10:37:16 +0530 | [diff] [blame] | 1496 | { |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1497 | return _add_opp_table_indexed(dev, 0, getclk); |
Viresh Kumar | e77dcb0 | 2020-11-06 10:37:16 +0530 | [diff] [blame] | 1498 | } |
| 1499 | |
Viresh Kumar | eb7c8743 | 2018-09-05 16:17:14 +0530 | [diff] [blame] | 1500 | struct opp_table *dev_pm_opp_get_opp_table(struct device *dev) |
| 1501 | { |
Viresh Kumar | e77dcb0 | 2020-11-06 10:37:16 +0530 | [diff] [blame] | 1502 | return _find_opp_table(dev); |
Viresh Kumar | eb7c8743 | 2018-09-05 16:17:14 +0530 | [diff] [blame] | 1503 | } |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1504 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_table); |
| 1505 | |
Viresh Kumar | b83c189 | 2017-01-23 10:11:45 +0530 | [diff] [blame] | 1506 | static void _opp_table_kref_release(struct kref *kref) |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1507 | { |
| 1508 | struct opp_table *opp_table = container_of(kref, struct opp_table, kref); |
Viresh Kumar | cdd6ed9 | 2018-09-12 12:35:19 +0530 | [diff] [blame] | 1509 | struct opp_device *opp_dev, *temp; |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1510 | int i; |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1511 | |
Viresh Kumar | e0df59d | 2020-10-22 12:26:08 +0530 | [diff] [blame] | 1512 | /* Drop the lock as soon as we can */ |
| 1513 | list_del(&opp_table->node); |
| 1514 | mutex_unlock(&opp_table_lock); |
| 1515 | |
Viresh Kumar | 81c4d8a | 2021-01-20 16:16:48 +0530 | [diff] [blame] | 1516 | if (opp_table->current_opp) |
| 1517 | dev_pm_opp_put(opp_table->current_opp); |
| 1518 | |
Viresh Kumar | 5d6d106 | 2018-06-07 14:50:43 +0530 | [diff] [blame] | 1519 | _of_clear_opp_table(opp_table); |
| 1520 | |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1521 | /* Release automatically acquired single clk */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1522 | if (!IS_ERR(opp_table->clk)) |
| 1523 | clk_put(opp_table->clk); |
Viresh Kumar | d54974c | 2016-02-09 10:30:38 +0530 | [diff] [blame] | 1524 | |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1525 | if (opp_table->paths) { |
| 1526 | for (i = 0; i < opp_table->path_count; i++) |
| 1527 | icc_put(opp_table->paths[i]); |
| 1528 | kfree(opp_table->paths); |
| 1529 | } |
| 1530 | |
Viresh Kumar | cdd6ed9 | 2018-09-12 12:35:19 +0530 | [diff] [blame] | 1531 | WARN_ON(!list_empty(&opp_table->opp_list)); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1532 | |
Viresh Kumar | 04bd2ea | 2023-06-14 12:50:20 +0530 | [diff] [blame] | 1533 | list_for_each_entry_safe(opp_dev, temp, &opp_table->dev_list, node) |
Viresh Kumar | cdd6ed9 | 2018-09-12 12:35:19 +0530 | [diff] [blame] | 1534 | _remove_opp_dev(opp_dev, opp_table); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1535 | |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 1536 | mutex_destroy(&opp_table->genpd_virt_dev_lock); |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 1537 | mutex_destroy(&opp_table->lock); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1538 | kfree(opp_table); |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1539 | } |
| 1540 | |
| 1541 | void dev_pm_opp_put_opp_table(struct opp_table *opp_table) |
| 1542 | { |
| 1543 | kref_put_mutex(&opp_table->kref, _opp_table_kref_release, |
| 1544 | &opp_table_lock); |
| 1545 | } |
| 1546 | EXPORT_SYMBOL_GPL(dev_pm_opp_put_opp_table); |
| 1547 | |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1548 | void _opp_free(struct dev_pm_opp *opp) |
Viresh Kumar | 969fceb | 2017-01-02 14:40:59 +0530 | [diff] [blame] | 1549 | { |
| 1550 | kfree(opp); |
Viresh Kumar | 969fceb | 2017-01-02 14:40:59 +0530 | [diff] [blame] | 1551 | } |
| 1552 | |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1553 | static void _opp_kref_release(struct kref *kref) |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1554 | { |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1555 | struct dev_pm_opp *opp = container_of(kref, struct dev_pm_opp, kref); |
| 1556 | struct opp_table *opp_table = opp->opp_table; |
| 1557 | |
| 1558 | list_del(&opp->node); |
| 1559 | mutex_unlock(&opp_table->lock); |
| 1560 | |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1561 | /* |
| 1562 | * Notify the changes in the availability of the operable |
| 1563 | * frequency/voltage list. |
| 1564 | */ |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1565 | blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_REMOVE, opp); |
Liang He | 3466ea2 | 2022-07-18 21:36:32 +0800 | [diff] [blame] | 1566 | _of_clear_opp(opp_table, opp); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 1567 | opp_debug_remove_one(opp); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1568 | kfree(opp); |
Viresh Kumar | 1690d8b | 2019-01-04 15:14:33 +0530 | [diff] [blame] | 1569 | } |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1570 | |
Viresh Kumar | a88bd2a | 2017-11-29 15:18:36 +0530 | [diff] [blame] | 1571 | void dev_pm_opp_get(struct dev_pm_opp *opp) |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 1572 | { |
| 1573 | kref_get(&opp->kref); |
| 1574 | } |
| 1575 | |
Viresh Kumar | 7034764 | 2017-01-23 10:11:46 +0530 | [diff] [blame] | 1576 | void dev_pm_opp_put(struct dev_pm_opp *opp) |
| 1577 | { |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1578 | kref_put_mutex(&opp->kref, _opp_kref_release, &opp->opp_table->lock); |
Viresh Kumar | 7034764 | 2017-01-23 10:11:46 +0530 | [diff] [blame] | 1579 | } |
| 1580 | EXPORT_SYMBOL_GPL(dev_pm_opp_put); |
| 1581 | |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1582 | /** |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1583 | * dev_pm_opp_remove() - Remove an OPP from OPP table |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1584 | * @dev: device for which we do this operation |
| 1585 | * @freq: OPP to remove with matching 'freq' |
| 1586 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1587 | * This function removes an opp from the opp table. |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1588 | */ |
| 1589 | void dev_pm_opp_remove(struct device *dev, unsigned long freq) |
| 1590 | { |
Jakob Koschel | 95073b7 | 2022-03-24 08:18:15 +0100 | [diff] [blame] | 1591 | struct dev_pm_opp *opp = NULL, *iter; |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1592 | struct opp_table *opp_table; |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1593 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1594 | opp_table = _find_opp_table(dev); |
| 1595 | if (IS_ERR(opp_table)) |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1596 | return; |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1597 | |
Viresh Kumar | f123ea7 | 2022-06-10 10:27:51 +0530 | [diff] [blame] | 1598 | if (!assert_single_clk(opp_table)) |
| 1599 | goto put_table; |
| 1600 | |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 1601 | mutex_lock(&opp_table->lock); |
| 1602 | |
Jakob Koschel | 95073b7 | 2022-03-24 08:18:15 +0100 | [diff] [blame] | 1603 | list_for_each_entry(iter, &opp_table->opp_list, node) { |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1604 | if (iter->rates[0] == freq) { |
Jakob Koschel | 95073b7 | 2022-03-24 08:18:15 +0100 | [diff] [blame] | 1605 | opp = iter; |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1606 | break; |
| 1607 | } |
| 1608 | } |
| 1609 | |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 1610 | mutex_unlock(&opp_table->lock); |
| 1611 | |
Jakob Koschel | 95073b7 | 2022-03-24 08:18:15 +0100 | [diff] [blame] | 1612 | if (opp) { |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1613 | dev_pm_opp_put(opp); |
Viresh Kumar | 0ad8c62 | 2018-08-02 14:23:09 +0530 | [diff] [blame] | 1614 | |
| 1615 | /* Drop the reference taken by dev_pm_opp_add() */ |
| 1616 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1617 | } else { |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1618 | dev_warn(dev, "%s: Couldn't find OPP with freq: %lu\n", |
| 1619 | __func__, freq); |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1620 | } |
| 1621 | |
Viresh Kumar | f123ea7 | 2022-06-10 10:27:51 +0530 | [diff] [blame] | 1622 | put_table: |
Viresh Kumar | 0ad8c62 | 2018-08-02 14:23:09 +0530 | [diff] [blame] | 1623 | /* Drop the reference taken by _find_opp_table() */ |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1624 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1625 | } |
| 1626 | EXPORT_SYMBOL_GPL(dev_pm_opp_remove); |
| 1627 | |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1628 | static struct dev_pm_opp *_opp_get_next(struct opp_table *opp_table, |
| 1629 | bool dynamic) |
| 1630 | { |
| 1631 | struct dev_pm_opp *opp = NULL, *temp; |
| 1632 | |
| 1633 | mutex_lock(&opp_table->lock); |
| 1634 | list_for_each_entry(temp, &opp_table->opp_list, node) { |
Beata Michalska | 606a5d42 | 2021-03-04 15:07:34 +0000 | [diff] [blame] | 1635 | /* |
| 1636 | * Refcount must be dropped only once for each OPP by OPP core, |
| 1637 | * do that with help of "removed" flag. |
| 1638 | */ |
| 1639 | if (!temp->removed && dynamic == temp->dynamic) { |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1640 | opp = temp; |
| 1641 | break; |
| 1642 | } |
| 1643 | } |
| 1644 | |
| 1645 | mutex_unlock(&opp_table->lock); |
| 1646 | return opp; |
| 1647 | } |
| 1648 | |
Beata Michalska | 606a5d42 | 2021-03-04 15:07:34 +0000 | [diff] [blame] | 1649 | /* |
| 1650 | * Can't call dev_pm_opp_put() from under the lock as debugfs removal needs to |
| 1651 | * happen lock less to avoid circular dependency issues. This routine must be |
| 1652 | * called without the opp_table->lock held. |
| 1653 | */ |
| 1654 | static void _opp_remove_all(struct opp_table *opp_table, bool dynamic) |
Viresh Kumar | 03758d6 | 2019-11-11 16:35:03 +0530 | [diff] [blame] | 1655 | { |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1656 | struct dev_pm_opp *opp; |
Viresh Kumar | 03758d6 | 2019-11-11 16:35:03 +0530 | [diff] [blame] | 1657 | |
Beata Michalska | 606a5d42 | 2021-03-04 15:07:34 +0000 | [diff] [blame] | 1658 | while ((opp = _opp_get_next(opp_table, dynamic))) { |
| 1659 | opp->removed = true; |
| 1660 | dev_pm_opp_put(opp); |
| 1661 | |
| 1662 | /* Drop the references taken by dev_pm_opp_add() */ |
| 1663 | if (dynamic) |
| 1664 | dev_pm_opp_put_opp_table(opp_table); |
| 1665 | } |
| 1666 | } |
| 1667 | |
| 1668 | bool _opp_remove_all_static(struct opp_table *opp_table) |
| 1669 | { |
Viresh Kumar | 03758d6 | 2019-11-11 16:35:03 +0530 | [diff] [blame] | 1670 | mutex_lock(&opp_table->lock); |
| 1671 | |
Viresh Kumar | 922ff07 | 2020-08-31 13:03:06 +0530 | [diff] [blame] | 1672 | if (!opp_table->parsed_static_opps) { |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1673 | mutex_unlock(&opp_table->lock); |
| 1674 | return false; |
Viresh Kumar | 922ff07 | 2020-08-31 13:03:06 +0530 | [diff] [blame] | 1675 | } |
| 1676 | |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1677 | if (--opp_table->parsed_static_opps) { |
| 1678 | mutex_unlock(&opp_table->lock); |
| 1679 | return true; |
Viresh Kumar | 03758d6 | 2019-11-11 16:35:03 +0530 | [diff] [blame] | 1680 | } |
| 1681 | |
Viresh Kumar | 03758d6 | 2019-11-11 16:35:03 +0530 | [diff] [blame] | 1682 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | 922ff07 | 2020-08-31 13:03:06 +0530 | [diff] [blame] | 1683 | |
Beata Michalska | 606a5d42 | 2021-03-04 15:07:34 +0000 | [diff] [blame] | 1684 | _opp_remove_all(opp_table, false); |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1685 | return true; |
Viresh Kumar | 03758d6 | 2019-11-11 16:35:03 +0530 | [diff] [blame] | 1686 | } |
| 1687 | |
Viresh Kumar | 1690d8b | 2019-01-04 15:14:33 +0530 | [diff] [blame] | 1688 | /** |
| 1689 | * dev_pm_opp_remove_all_dynamic() - Remove all dynamically created OPPs |
| 1690 | * @dev: device for which we do this operation |
| 1691 | * |
| 1692 | * This function removes all dynamically created OPPs from the opp table. |
| 1693 | */ |
| 1694 | void dev_pm_opp_remove_all_dynamic(struct device *dev) |
| 1695 | { |
| 1696 | struct opp_table *opp_table; |
Viresh Kumar | 1690d8b | 2019-01-04 15:14:33 +0530 | [diff] [blame] | 1697 | |
| 1698 | opp_table = _find_opp_table(dev); |
| 1699 | if (IS_ERR(opp_table)) |
| 1700 | return; |
| 1701 | |
Beata Michalska | 606a5d42 | 2021-03-04 15:07:34 +0000 | [diff] [blame] | 1702 | _opp_remove_all(opp_table, true); |
Viresh Kumar | 1690d8b | 2019-01-04 15:14:33 +0530 | [diff] [blame] | 1703 | |
| 1704 | /* Drop the reference taken by _find_opp_table() */ |
| 1705 | dev_pm_opp_put_opp_table(opp_table); |
| 1706 | } |
| 1707 | EXPORT_SYMBOL_GPL(dev_pm_opp_remove_all_dynamic); |
| 1708 | |
Viresh Kumar | d613458 | 2022-06-09 15:35:36 +0530 | [diff] [blame] | 1709 | struct dev_pm_opp *_opp_allocate(struct opp_table *opp_table) |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1710 | { |
| 1711 | struct dev_pm_opp *opp; |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1712 | int supply_count, supply_size, icc_size, clk_size; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1713 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1714 | /* Allocate space for at least one supply */ |
Viresh Kumar | d613458 | 2022-06-09 15:35:36 +0530 | [diff] [blame] | 1715 | supply_count = opp_table->regulator_count > 0 ? |
| 1716 | opp_table->regulator_count : 1; |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1717 | supply_size = sizeof(*opp->supplies) * supply_count; |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1718 | clk_size = sizeof(*opp->rates) * opp_table->clk_count; |
Viresh Kumar | d613458 | 2022-06-09 15:35:36 +0530 | [diff] [blame] | 1719 | icc_size = sizeof(*opp->bandwidth) * opp_table->path_count; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1720 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1721 | /* allocate new OPP node and supplies structures */ |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1722 | opp = kzalloc(sizeof(*opp) + supply_size + clk_size + icc_size, GFP_KERNEL); |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1723 | if (!opp) |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1724 | return NULL; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1725 | |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1726 | /* Put the supplies, bw and clock at the end of the OPP structure */ |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1727 | opp->supplies = (struct dev_pm_opp_supply *)(opp + 1); |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1728 | |
| 1729 | opp->rates = (unsigned long *)(opp->supplies + supply_count); |
| 1730 | |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1731 | if (icc_size) |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1732 | opp->bandwidth = (struct dev_pm_opp_icc_bw *)(opp->rates + opp_table->clk_count); |
| 1733 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1734 | INIT_LIST_HEAD(&opp->node); |
| 1735 | |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1736 | return opp; |
| 1737 | } |
| 1738 | |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 1739 | static bool _opp_supported_by_regulators(struct dev_pm_opp *opp, |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1740 | struct opp_table *opp_table) |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 1741 | { |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1742 | struct regulator *reg; |
| 1743 | int i; |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 1744 | |
Viresh Kumar | 90e3577 | 2018-12-11 16:32:47 +0530 | [diff] [blame] | 1745 | if (!opp_table->regulators) |
| 1746 | return true; |
| 1747 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1748 | for (i = 0; i < opp_table->regulator_count; i++) { |
| 1749 | reg = opp_table->regulators[i]; |
| 1750 | |
| 1751 | if (!regulator_is_supported_voltage(reg, |
| 1752 | opp->supplies[i].u_volt_min, |
| 1753 | opp->supplies[i].u_volt_max)) { |
| 1754 | pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n", |
| 1755 | __func__, opp->supplies[i].u_volt_min, |
| 1756 | opp->supplies[i].u_volt_max); |
| 1757 | return false; |
| 1758 | } |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 1759 | } |
| 1760 | |
| 1761 | return true; |
| 1762 | } |
| 1763 | |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1764 | static int _opp_compare_rate(struct opp_table *opp_table, |
| 1765 | struct dev_pm_opp *opp1, struct dev_pm_opp *opp2) |
| 1766 | { |
| 1767 | int i; |
| 1768 | |
| 1769 | for (i = 0; i < opp_table->clk_count; i++) { |
| 1770 | if (opp1->rates[i] != opp2->rates[i]) |
| 1771 | return opp1->rates[i] < opp2->rates[i] ? -1 : 1; |
| 1772 | } |
| 1773 | |
| 1774 | /* Same rates for both OPPs */ |
| 1775 | return 0; |
| 1776 | } |
| 1777 | |
Viresh Kumar | 274c3e8 | 2022-07-05 11:50:47 +0530 | [diff] [blame] | 1778 | static int _opp_compare_bw(struct opp_table *opp_table, struct dev_pm_opp *opp1, |
| 1779 | struct dev_pm_opp *opp2) |
| 1780 | { |
| 1781 | int i; |
| 1782 | |
| 1783 | for (i = 0; i < opp_table->path_count; i++) { |
| 1784 | if (opp1->bandwidth[i].peak != opp2->bandwidth[i].peak) |
| 1785 | return opp1->bandwidth[i].peak < opp2->bandwidth[i].peak ? -1 : 1; |
| 1786 | } |
| 1787 | |
| 1788 | /* Same bw for both OPPs */ |
| 1789 | return 0; |
| 1790 | } |
| 1791 | |
Viresh Kumar | 8bdac14 | 2022-06-10 10:32:50 +0530 | [diff] [blame] | 1792 | /* |
| 1793 | * Returns |
| 1794 | * 0: opp1 == opp2 |
| 1795 | * 1: opp1 > opp2 |
| 1796 | * -1: opp1 < opp2 |
| 1797 | */ |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1798 | int _opp_compare_key(struct opp_table *opp_table, struct dev_pm_opp *opp1, |
| 1799 | struct dev_pm_opp *opp2) |
Saravana Kannan | 6c591ee | 2020-05-12 15:53:19 +0300 | [diff] [blame] | 1800 | { |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1801 | int ret; |
| 1802 | |
| 1803 | ret = _opp_compare_rate(opp_table, opp1, opp2); |
| 1804 | if (ret) |
| 1805 | return ret; |
| 1806 | |
Viresh Kumar | 274c3e8 | 2022-07-05 11:50:47 +0530 | [diff] [blame] | 1807 | ret = _opp_compare_bw(opp_table, opp1, opp2); |
| 1808 | if (ret) |
| 1809 | return ret; |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1810 | |
Saravana Kannan | 6c591ee | 2020-05-12 15:53:19 +0300 | [diff] [blame] | 1811 | if (opp1->level != opp2->level) |
| 1812 | return opp1->level < opp2->level ? -1 : 1; |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1813 | |
| 1814 | /* Duplicate OPPs */ |
Saravana Kannan | 6c591ee | 2020-05-12 15:53:19 +0300 | [diff] [blame] | 1815 | return 0; |
| 1816 | } |
| 1817 | |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 1818 | static int _opp_is_duplicate(struct device *dev, struct dev_pm_opp *new_opp, |
| 1819 | struct opp_table *opp_table, |
| 1820 | struct list_head **head) |
| 1821 | { |
| 1822 | struct dev_pm_opp *opp; |
Saravana Kannan | 6c591ee | 2020-05-12 15:53:19 +0300 | [diff] [blame] | 1823 | int opp_cmp; |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 1824 | |
| 1825 | /* |
| 1826 | * Insert new OPP in order of increasing frequency and discard if |
| 1827 | * already present. |
| 1828 | * |
| 1829 | * Need to use &opp_table->opp_list in the condition part of the 'for' |
| 1830 | * loop, don't replace it with head otherwise it will become an infinite |
| 1831 | * loop. |
| 1832 | */ |
| 1833 | list_for_each_entry(opp, &opp_table->opp_list, node) { |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1834 | opp_cmp = _opp_compare_key(opp_table, new_opp, opp); |
Saravana Kannan | 6c591ee | 2020-05-12 15:53:19 +0300 | [diff] [blame] | 1835 | if (opp_cmp > 0) { |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 1836 | *head = &opp->node; |
| 1837 | continue; |
| 1838 | } |
| 1839 | |
Saravana Kannan | 6c591ee | 2020-05-12 15:53:19 +0300 | [diff] [blame] | 1840 | if (opp_cmp < 0) |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 1841 | return 0; |
| 1842 | |
| 1843 | /* Duplicate OPPs */ |
| 1844 | dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n", |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1845 | __func__, opp->rates[0], opp->supplies[0].u_volt, |
| 1846 | opp->available, new_opp->rates[0], |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 1847 | new_opp->supplies[0].u_volt, new_opp->available); |
| 1848 | |
| 1849 | /* Should we compare voltages for all regulators here ? */ |
| 1850 | return opp->available && |
| 1851 | new_opp->supplies[0].u_volt == opp->supplies[0].u_volt ? -EBUSY : -EEXIST; |
| 1852 | } |
| 1853 | |
| 1854 | return 0; |
| 1855 | } |
| 1856 | |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 1857 | void _required_opps_available(struct dev_pm_opp *opp, int count) |
| 1858 | { |
| 1859 | int i; |
| 1860 | |
| 1861 | for (i = 0; i < count; i++) { |
| 1862 | if (opp->required_opps[i]->available) |
| 1863 | continue; |
| 1864 | |
| 1865 | opp->available = false; |
| 1866 | pr_warn("%s: OPP not supported by required OPP %pOF (%lu)\n", |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1867 | __func__, opp->required_opps[i]->np, opp->rates[0]); |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 1868 | return; |
| 1869 | } |
| 1870 | } |
| 1871 | |
Viresh Kumar | 7f8538e | 2017-01-02 14:40:55 +0530 | [diff] [blame] | 1872 | /* |
| 1873 | * Returns: |
| 1874 | * 0: On success. And appropriate error message for duplicate OPPs. |
| 1875 | * -EBUSY: For OPP with same freq/volt and is available. The callers of |
| 1876 | * _opp_add() must return 0 if they receive -EBUSY from it. This is to make |
| 1877 | * sure we don't print error messages unnecessarily if different parts of |
| 1878 | * kernel try to initialize the OPP table. |
| 1879 | * -EEXIST: For OPP with same freq but different volt or is unavailable. This |
| 1880 | * should be considered an error by the callers of _opp_add(). |
| 1881 | */ |
Viresh Kumar | f47b72a | 2016-05-05 16:20:33 +0530 | [diff] [blame] | 1882 | int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, |
Viresh Kumar | 4768914 | 2022-06-08 11:57:24 +0530 | [diff] [blame] | 1883 | struct opp_table *opp_table) |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1884 | { |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 1885 | struct list_head *head; |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 1886 | int ret; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1887 | |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 1888 | mutex_lock(&opp_table->lock); |
| 1889 | head = &opp_table->opp_list; |
| 1890 | |
Dmitry Osipenko | 32715be | 2021-01-18 03:55:13 +0300 | [diff] [blame] | 1891 | ret = _opp_is_duplicate(dev, new_opp, opp_table, &head); |
| 1892 | if (ret) { |
| 1893 | mutex_unlock(&opp_table->lock); |
| 1894 | return ret; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1895 | } |
| 1896 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1897 | list_add(&new_opp->node, head); |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 1898 | mutex_unlock(&opp_table->lock); |
| 1899 | |
| 1900 | new_opp->opp_table = opp_table; |
Viresh Kumar | 7034764 | 2017-01-23 10:11:46 +0530 | [diff] [blame] | 1901 | kref_init(&new_opp->kref); |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1902 | |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 1903 | opp_debug_create_one(new_opp, opp_table); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 1904 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1905 | if (!_opp_supported_by_regulators(new_opp, opp_table)) { |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 1906 | new_opp->available = false; |
| 1907 | dev_warn(dev, "%s: OPP not supported by regulators (%lu)\n", |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1908 | __func__, new_opp->rates[0]); |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 1909 | } |
| 1910 | |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 1911 | /* required-opps not fully initialized yet */ |
| 1912 | if (lazy_linking_pending(opp_table)) |
| 1913 | return 0; |
Dmitry Osipenko | cf65948 | 2021-01-18 03:55:14 +0300 | [diff] [blame] | 1914 | |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 1915 | _required_opps_available(new_opp, opp_table->required_opp_count); |
Dmitry Osipenko | cf65948 | 2021-01-18 03:55:14 +0300 | [diff] [blame] | 1916 | |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1917 | return 0; |
| 1918 | } |
| 1919 | |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 1920 | /** |
Viresh Kumar | b64b9c3f | 2015-10-15 21:42:44 +0530 | [diff] [blame] | 1921 | * _opp_add_v1() - Allocate a OPP based on v1 bindings. |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1922 | * @opp_table: OPP table |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1923 | * @dev: device for which we do this operation |
| 1924 | * @freq: Frequency in Hz for this OPP |
| 1925 | * @u_volt: Voltage in uVolts for this OPP |
| 1926 | * @dynamic: Dynamically added OPPs. |
| 1927 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1928 | * This function adds an opp definition to the opp table and returns status. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1929 | * The opp is made available by default and it can be controlled using |
| 1930 | * dev_pm_opp_enable/disable functions and may be removed by dev_pm_opp_remove. |
| 1931 | * |
Viresh Kumar | 8f8d37b | 2015-09-04 13:47:24 +0530 | [diff] [blame] | 1932 | * NOTE: "dynamic" parameter impacts OPPs added by the dev_pm_opp_of_add_table |
| 1933 | * and freed by dev_pm_opp_of_remove_table. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1934 | * |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1935 | * Return: |
| 1936 | * 0 On success OR |
| 1937 | * Duplicate OPPs (both freq and volt are same) and opp->available |
| 1938 | * -EEXIST Freq are same and volt are different OR |
| 1939 | * Duplicate OPPs (both freq and volt are same) and !opp->available |
| 1940 | * -ENOMEM Memory allocation failure |
| 1941 | */ |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1942 | int _opp_add_v1(struct opp_table *opp_table, struct device *dev, |
| 1943 | unsigned long freq, long u_volt, bool dynamic) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1944 | { |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1945 | struct dev_pm_opp *new_opp; |
Viresh Kumar | 50f8cfb | 2016-02-09 10:30:37 +0530 | [diff] [blame] | 1946 | unsigned long tol; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1947 | int ret; |
| 1948 | |
Viresh Kumar | f123ea7 | 2022-06-10 10:27:51 +0530 | [diff] [blame] | 1949 | if (!assert_single_clk(opp_table)) |
| 1950 | return -EINVAL; |
| 1951 | |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1952 | new_opp = _opp_allocate(opp_table); |
| 1953 | if (!new_opp) |
| 1954 | return -ENOMEM; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1955 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1956 | /* populate the opp table */ |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 1957 | new_opp->rates[0] = freq; |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1958 | tol = u_volt * opp_table->voltage_tolerance_v1 / 100; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1959 | new_opp->supplies[0].u_volt = u_volt; |
| 1960 | new_opp->supplies[0].u_volt_min = u_volt - tol; |
| 1961 | new_opp->supplies[0].u_volt_max = u_volt + tol; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1962 | new_opp->available = true; |
Viresh Kumar | aa5f2f8 | 2015-07-29 16:23:00 +0530 | [diff] [blame] | 1963 | new_opp->dynamic = dynamic; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1964 | |
Viresh Kumar | 4768914 | 2022-06-08 11:57:24 +0530 | [diff] [blame] | 1965 | ret = _opp_add(dev, new_opp, opp_table); |
Viresh Kumar | 7f8538e | 2017-01-02 14:40:55 +0530 | [diff] [blame] | 1966 | if (ret) { |
| 1967 | /* Don't return error for duplicate OPPs */ |
| 1968 | if (ret == -EBUSY) |
| 1969 | ret = 0; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1970 | goto free_opp; |
Viresh Kumar | 7f8538e | 2017-01-02 14:40:55 +0530 | [diff] [blame] | 1971 | } |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1972 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1973 | /* |
| 1974 | * Notify the changes in the availability of the operable |
| 1975 | * frequency/voltage list. |
| 1976 | */ |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1977 | blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADD, new_opp); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1978 | return 0; |
| 1979 | |
| 1980 | free_opp: |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1981 | _opp_free(new_opp); |
| 1982 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1983 | return ret; |
| 1984 | } |
Viresh Kumar | 38393409 | 2014-11-25 16:04:18 +0530 | [diff] [blame] | 1985 | |
Viresh Kumar | 2746590 | 2015-07-29 16:23:02 +0530 | [diff] [blame] | 1986 | /** |
Viresh Kumar | 89f0398 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 1987 | * _opp_set_supported_hw() - Set supported platforms |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1988 | * @dev: Device for which supported-hw has to be set. |
| 1989 | * @versions: Array of hierarchy of versions to match. |
| 1990 | * @count: Number of elements in the array. |
| 1991 | * |
| 1992 | * This is required only for the V2 bindings, and it enables a platform to |
| 1993 | * specify the hierarchy of versions it supports. OPP layer will then enable |
| 1994 | * OPPs, which are available for those versions, based on its 'opp-supported-hw' |
| 1995 | * property. |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1996 | */ |
Viresh Kumar | 89f0398 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 1997 | static int _opp_set_supported_hw(struct opp_table *opp_table, |
| 1998 | const u32 *versions, unsigned int count) |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1999 | { |
Viresh Kumar | 25419de | 2018-05-22 16:38:08 +0530 | [diff] [blame] | 2000 | /* Another CPU that shares the OPP table has set the property ? */ |
| 2001 | if (opp_table->supported_hw) |
Viresh Kumar | 89f0398 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2002 | return 0; |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 2003 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 2004 | opp_table->supported_hw = kmemdup(versions, count * sizeof(*versions), |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 2005 | GFP_KERNEL); |
Viresh Kumar | 89f0398 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2006 | if (!opp_table->supported_hw) |
| 2007 | return -ENOMEM; |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 2008 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 2009 | opp_table->supported_hw_count = count; |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 2010 | |
Viresh Kumar | 89f0398 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2011 | return 0; |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 2012 | } |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 2013 | |
| 2014 | /** |
Viresh Kumar | 89f0398 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2015 | * _opp_put_supported_hw() - Releases resources blocked for supported hw |
| 2016 | * @opp_table: OPP table returned by _opp_set_supported_hw(). |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 2017 | * |
| 2018 | * This is required only for the V2 bindings, and is called for a matching |
Viresh Kumar | 89f0398 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2019 | * _opp_set_supported_hw(). Until this is called, the opp_table structure |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 2020 | * will not be freed. |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 2021 | */ |
Viresh Kumar | 89f0398 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2022 | static void _opp_put_supported_hw(struct opp_table *opp_table) |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 2023 | { |
Viresh Kumar | 89f0398 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2024 | if (opp_table->supported_hw) { |
| 2025 | kfree(opp_table->supported_hw); |
| 2026 | opp_table->supported_hw = NULL; |
| 2027 | opp_table->supported_hw_count = 0; |
| 2028 | } |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 2029 | } |
Yangtao Li | 9c4f220 | 2021-03-14 19:33:56 +0300 | [diff] [blame] | 2030 | |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 2031 | /** |
Viresh Kumar | 298098e | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2032 | * _opp_set_prop_name() - Set prop-extn name |
Viresh Kumar | a5da644 | 2016-02-16 14:17:52 +0530 | [diff] [blame] | 2033 | * @dev: Device for which the prop-name has to be set. |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 2034 | * @name: name to postfix to properties. |
| 2035 | * |
| 2036 | * This is required only for the V2 bindings, and it enables a platform to |
| 2037 | * specify the extn to be used for certain property names. The properties to |
| 2038 | * which the extension will apply are opp-microvolt and opp-microamp. OPP core |
| 2039 | * should postfix the property name with -<name> while looking for them. |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 2040 | */ |
Viresh Kumar | 298098e | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2041 | static int _opp_set_prop_name(struct opp_table *opp_table, const char *name) |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 2042 | { |
Viresh Kumar | 878ec1a | 2018-05-22 16:38:08 +0530 | [diff] [blame] | 2043 | /* Another CPU that shares the OPP table has set the property ? */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 2044 | if (!opp_table->prop_name) { |
Viresh Kumar | 298098e | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2045 | opp_table->prop_name = kstrdup(name, GFP_KERNEL); |
| 2046 | if (!opp_table->prop_name) |
| 2047 | return -ENOMEM; |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 2048 | } |
| 2049 | |
Viresh Kumar | 298098e | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2050 | return 0; |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 2051 | } |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 2052 | |
| 2053 | /** |
Viresh Kumar | 298098e | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2054 | * _opp_put_prop_name() - Releases resources blocked for prop-name |
| 2055 | * @opp_table: OPP table returned by _opp_set_prop_name(). |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 2056 | * |
| 2057 | * This is required only for the V2 bindings, and is called for a matching |
Viresh Kumar | 298098e | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2058 | * _opp_set_prop_name(). Until this is called, the opp_table structure |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 2059 | * will not be freed. |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 2060 | */ |
Viresh Kumar | 298098e | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2061 | static void _opp_put_prop_name(struct opp_table *opp_table) |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 2062 | { |
Viresh Kumar | 298098e | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2063 | if (opp_table->prop_name) { |
| 2064 | kfree(opp_table->prop_name); |
| 2065 | opp_table->prop_name = NULL; |
| 2066 | } |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 2067 | } |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 2068 | |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2069 | /** |
Viresh Kumar | b0ec094 | 2022-07-04 16:36:26 +0530 | [diff] [blame] | 2070 | * _opp_set_regulators() - Set regulator names for the device |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2071 | * @dev: Device for which regulator name is being set. |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2072 | * @names: Array of pointers to the names of the regulator. |
| 2073 | * @count: Number of regulators. |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2074 | * |
| 2075 | * In order to support OPP switching, OPP layer needs to know the name of the |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2076 | * device's regulators, as the core would be required to switch voltages as |
| 2077 | * well. |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2078 | * |
| 2079 | * This must be called before any OPPs are initialized for the device. |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2080 | */ |
Viresh Kumar | b0ec094 | 2022-07-04 16:36:26 +0530 | [diff] [blame] | 2081 | static int _opp_set_regulators(struct opp_table *opp_table, struct device *dev, |
| 2082 | const char * const names[]) |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2083 | { |
Viresh Kumar | 87686cc | 2022-07-04 16:10:39 +0530 | [diff] [blame] | 2084 | const char * const *temp = names; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2085 | struct regulator *reg; |
Viresh Kumar | 87686cc | 2022-07-04 16:10:39 +0530 | [diff] [blame] | 2086 | int count = 0, ret, i; |
| 2087 | |
| 2088 | /* Count number of regulators */ |
| 2089 | while (*temp++) |
| 2090 | count++; |
| 2091 | |
| 2092 | if (!count) |
Viresh Kumar | b0ec094 | 2022-07-04 16:36:26 +0530 | [diff] [blame] | 2093 | return -EINVAL; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2094 | |
Viresh Kumar | 779b783 | 2018-05-22 16:38:08 +0530 | [diff] [blame] | 2095 | /* Another CPU that shares the OPP table has set the regulators ? */ |
| 2096 | if (opp_table->regulators) |
Viresh Kumar | b0ec094 | 2022-07-04 16:36:26 +0530 | [diff] [blame] | 2097 | return 0; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2098 | |
| 2099 | opp_table->regulators = kmalloc_array(count, |
| 2100 | sizeof(*opp_table->regulators), |
| 2101 | GFP_KERNEL); |
Viresh Kumar | b0ec094 | 2022-07-04 16:36:26 +0530 | [diff] [blame] | 2102 | if (!opp_table->regulators) |
| 2103 | return -ENOMEM; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2104 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2105 | for (i = 0; i < count; i++) { |
| 2106 | reg = regulator_get_optional(dev, names[i]); |
| 2107 | if (IS_ERR(reg)) { |
Krzysztof Kozlowski | 543256d | 2022-04-08 13:10:52 +0200 | [diff] [blame] | 2108 | ret = dev_err_probe(dev, PTR_ERR(reg), |
| 2109 | "%s: no regulator (%s) found\n", |
| 2110 | __func__, names[i]); |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2111 | goto free_regulators; |
| 2112 | } |
| 2113 | |
| 2114 | opp_table->regulators[i] = reg; |
| 2115 | } |
| 2116 | |
| 2117 | opp_table->regulator_count = count; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2118 | |
Viresh Kumar | c522ce8 | 2022-05-31 12:49:19 +0530 | [diff] [blame] | 2119 | /* Set generic config_regulators() for single regulators here */ |
| 2120 | if (count == 1) |
| 2121 | opp_table->config_regulators = _opp_config_regulator_single; |
| 2122 | |
Viresh Kumar | b0ec094 | 2022-07-04 16:36:26 +0530 | [diff] [blame] | 2123 | return 0; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2124 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2125 | free_regulators: |
Marek Szyprowski | 24957db | 2019-10-17 12:27:58 +0200 | [diff] [blame] | 2126 | while (i != 0) |
| 2127 | regulator_put(opp_table->regulators[--i]); |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2128 | |
| 2129 | kfree(opp_table->regulators); |
| 2130 | opp_table->regulators = NULL; |
Viresh Kumar | 46f48ac | 2018-12-11 16:39:36 +0530 | [diff] [blame] | 2131 | opp_table->regulator_count = -1; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2132 | |
Viresh Kumar | b0ec094 | 2022-07-04 16:36:26 +0530 | [diff] [blame] | 2133 | return ret; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2134 | } |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2135 | |
| 2136 | /** |
Viresh Kumar | b0ec094 | 2022-07-04 16:36:26 +0530 | [diff] [blame] | 2137 | * _opp_put_regulators() - Releases resources blocked for regulator |
| 2138 | * @opp_table: OPP table returned from _opp_set_regulators(). |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2139 | */ |
Viresh Kumar | b0ec094 | 2022-07-04 16:36:26 +0530 | [diff] [blame] | 2140 | static void _opp_put_regulators(struct opp_table *opp_table) |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2141 | { |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2142 | int i; |
| 2143 | |
Viresh Kumar | 779b783 | 2018-05-22 16:38:08 +0530 | [diff] [blame] | 2144 | if (!opp_table->regulators) |
Viresh Kumar | b0ec094 | 2022-07-04 16:36:26 +0530 | [diff] [blame] | 2145 | return; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2146 | |
Viresh Kumar | 72f80ce | 2020-08-13 08:38:37 +0530 | [diff] [blame] | 2147 | if (opp_table->enabled) { |
Kamil Konieczny | 8d45719 | 2019-07-19 17:05:32 +0200 | [diff] [blame] | 2148 | for (i = opp_table->regulator_count - 1; i >= 0; i--) |
| 2149 | regulator_disable(opp_table->regulators[i]); |
Kamil Konieczny | 8d45719 | 2019-07-19 17:05:32 +0200 | [diff] [blame] | 2150 | } |
| 2151 | |
Marek Szyprowski | 24957db | 2019-10-17 12:27:58 +0200 | [diff] [blame] | 2152 | for (i = opp_table->regulator_count - 1; i >= 0; i--) |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2153 | regulator_put(opp_table->regulators[i]); |
| 2154 | |
| 2155 | kfree(opp_table->regulators); |
| 2156 | opp_table->regulators = NULL; |
Viresh Kumar | 46f48ac | 2018-12-11 16:39:36 +0530 | [diff] [blame] | 2157 | opp_table->regulator_count = -1; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2158 | } |
Yangtao Li | 32aee78 | 2021-03-14 19:33:55 +0300 | [diff] [blame] | 2159 | |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2160 | static void _put_clks(struct opp_table *opp_table, int count) |
| 2161 | { |
| 2162 | int i; |
| 2163 | |
| 2164 | for (i = count - 1; i >= 0; i--) |
| 2165 | clk_put(opp_table->clks[i]); |
| 2166 | |
| 2167 | kfree(opp_table->clks); |
| 2168 | opp_table->clks = NULL; |
| 2169 | } |
| 2170 | |
Viresh Kumar | 38393409 | 2014-11-25 16:04:18 +0530 | [diff] [blame] | 2171 | /** |
Viresh Kumar | 2368f57 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2172 | * _opp_set_clknames() - Set clk names for the device |
| 2173 | * @dev: Device for which clk names is being set. |
| 2174 | * @names: Clk names. |
Viresh Kumar | 829a4e8 | 2017-06-21 10:29:13 +0530 | [diff] [blame] | 2175 | * |
Viresh Kumar | 2368f57 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2176 | * In order to support OPP switching, OPP layer needs to get pointers to the |
| 2177 | * clocks for the device. Simple cases work fine without using this routine |
| 2178 | * (i.e. by passing connection-id as NULL), but for a device with multiple |
| 2179 | * clocks available, the OPP core needs to know the exact names of the clks to |
| 2180 | * use. |
Viresh Kumar | 829a4e8 | 2017-06-21 10:29:13 +0530 | [diff] [blame] | 2181 | * |
| 2182 | * This must be called before any OPPs are initialized for the device. |
| 2183 | */ |
Viresh Kumar | 2368f57 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2184 | static int _opp_set_clknames(struct opp_table *opp_table, struct device *dev, |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2185 | const char * const names[], |
| 2186 | config_clks_t config_clks) |
Viresh Kumar | 829a4e8 | 2017-06-21 10:29:13 +0530 | [diff] [blame] | 2187 | { |
Viresh Kumar | 2368f57 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2188 | const char * const *temp = names; |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2189 | int count = 0, ret, i; |
| 2190 | struct clk *clk; |
Viresh Kumar | 829a4e8 | 2017-06-21 10:29:13 +0530 | [diff] [blame] | 2191 | |
Viresh Kumar | 2368f57 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2192 | /* Count number of clks */ |
| 2193 | while (*temp++) |
| 2194 | count++; |
Viresh Kumar | 829a4e8 | 2017-06-21 10:29:13 +0530 | [diff] [blame] | 2195 | |
Viresh Kumar | 2368f57 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2196 | /* |
| 2197 | * This is a special case where we have a single clock, whose connection |
| 2198 | * id name is NULL, i.e. first two entries are NULL in the array. |
| 2199 | */ |
| 2200 | if (!count && !names[1]) |
| 2201 | count = 1; |
| 2202 | |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2203 | /* Fail early for invalid configurations */ |
Viresh Kumar | 2f71ae1 | 2022-07-04 21:07:28 +0530 | [diff] [blame] | 2204 | if (!count || (!config_clks && count > 1)) |
Viresh Kumar | 2368f57 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2205 | return -EINVAL; |
Viresh Kumar | 829a4e8 | 2017-06-21 10:29:13 +0530 | [diff] [blame] | 2206 | |
Viresh Kumar | 0a43452 | 2022-05-25 14:47:59 +0530 | [diff] [blame] | 2207 | /* Another CPU that shares the OPP table has set the clkname ? */ |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2208 | if (opp_table->clks) |
Viresh Kumar | 2368f57 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2209 | return 0; |
Viresh Kumar | 0a43452 | 2022-05-25 14:47:59 +0530 | [diff] [blame] | 2210 | |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2211 | opp_table->clks = kmalloc_array(count, sizeof(*opp_table->clks), |
| 2212 | GFP_KERNEL); |
| 2213 | if (!opp_table->clks) |
| 2214 | return -ENOMEM; |
Viresh Kumar | 829a4e8 | 2017-06-21 10:29:13 +0530 | [diff] [blame] | 2215 | |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2216 | /* Find clks for the device */ |
| 2217 | for (i = 0; i < count; i++) { |
| 2218 | clk = clk_get(dev, names[i]); |
| 2219 | if (IS_ERR(clk)) { |
| 2220 | ret = dev_err_probe(dev, PTR_ERR(clk), |
| 2221 | "%s: Couldn't find clock with name: %s\n", |
| 2222 | __func__, names[i]); |
| 2223 | goto free_clks; |
| 2224 | } |
| 2225 | |
| 2226 | opp_table->clks[i] = clk; |
Viresh Kumar | 829a4e8 | 2017-06-21 10:29:13 +0530 | [diff] [blame] | 2227 | } |
| 2228 | |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2229 | opp_table->clk_count = count; |
Viresh Kumar | 2f71ae1 | 2022-07-04 21:07:28 +0530 | [diff] [blame] | 2230 | opp_table->config_clks = config_clks; |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2231 | |
| 2232 | /* Set generic single clk set here */ |
| 2233 | if (count == 1) { |
Viresh Kumar | 2f71ae1 | 2022-07-04 21:07:28 +0530 | [diff] [blame] | 2234 | if (!opp_table->config_clks) |
| 2235 | opp_table->config_clks = _opp_config_clk_single; |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2236 | |
| 2237 | /* |
| 2238 | * We could have just dropped the "clk" field and used "clks" |
| 2239 | * everywhere. Instead we kept the "clk" field around for |
| 2240 | * following reasons: |
| 2241 | * |
| 2242 | * - avoiding clks[0] everywhere else. |
| 2243 | * - not running single clk helpers for multiple clk usecase by |
| 2244 | * mistake. |
| 2245 | * |
| 2246 | * Since this is single-clk case, just update the clk pointer |
| 2247 | * too. |
| 2248 | */ |
| 2249 | opp_table->clk = opp_table->clks[0]; |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2250 | } |
Viresh Kumar | 0a43452 | 2022-05-25 14:47:59 +0530 | [diff] [blame] | 2251 | |
Viresh Kumar | 2368f57 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2252 | return 0; |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2253 | |
| 2254 | free_clks: |
| 2255 | _put_clks(opp_table, i); |
| 2256 | return ret; |
Yangtao Li | a74f681 | 2021-03-14 19:33:54 +0300 | [diff] [blame] | 2257 | } |
| 2258 | |
| 2259 | /** |
Viresh Kumar | 2368f57 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2260 | * _opp_put_clknames() - Releases resources blocked for clks. |
| 2261 | * @opp_table: OPP table returned from _opp_set_clknames(). |
Yangtao Li | a74f681 | 2021-03-14 19:33:54 +0300 | [diff] [blame] | 2262 | */ |
Viresh Kumar | 2368f57 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2263 | static void _opp_put_clknames(struct opp_table *opp_table) |
Yangtao Li | a74f681 | 2021-03-14 19:33:54 +0300 | [diff] [blame] | 2264 | { |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2265 | if (!opp_table->clks) |
| 2266 | return; |
| 2267 | |
| 2268 | opp_table->config_clks = NULL; |
| 2269 | opp_table->clk = ERR_PTR(-ENODEV); |
| 2270 | |
| 2271 | _put_clks(opp_table, opp_table->clk_count); |
Yangtao Li | a74f681 | 2021-03-14 19:33:54 +0300 | [diff] [blame] | 2272 | } |
Yangtao Li | a74f681 | 2021-03-14 19:33:54 +0300 | [diff] [blame] | 2273 | |
Viresh Kumar | 829a4e8 | 2017-06-21 10:29:13 +0530 | [diff] [blame] | 2274 | /** |
Viresh Kumar | aee3352 | 2022-07-04 13:45:08 +0530 | [diff] [blame] | 2275 | * _opp_set_config_regulators_helper() - Register custom set regulator helper. |
| 2276 | * @dev: Device for which the helper is getting registered. |
| 2277 | * @config_regulators: Custom set regulator helper. |
| 2278 | * |
| 2279 | * This is useful to support platforms with multiple regulators per device. |
| 2280 | * |
| 2281 | * This must be called before any OPPs are initialized for the device. |
| 2282 | */ |
| 2283 | static int _opp_set_config_regulators_helper(struct opp_table *opp_table, |
| 2284 | struct device *dev, config_regulators_t config_regulators) |
| 2285 | { |
| 2286 | /* Another CPU that shares the OPP table has set the helper ? */ |
| 2287 | if (!opp_table->config_regulators) |
| 2288 | opp_table->config_regulators = config_regulators; |
| 2289 | |
| 2290 | return 0; |
| 2291 | } |
| 2292 | |
| 2293 | /** |
| 2294 | * _opp_put_config_regulators_helper() - Releases resources blocked for |
| 2295 | * config_regulators helper. |
| 2296 | * @opp_table: OPP table returned from _opp_set_config_regulators_helper(). |
| 2297 | * |
| 2298 | * Release resources blocked for platform specific config_regulators helper. |
| 2299 | */ |
| 2300 | static void _opp_put_config_regulators_helper(struct opp_table *opp_table) |
| 2301 | { |
| 2302 | if (opp_table->config_regulators) |
| 2303 | opp_table->config_regulators = NULL; |
| 2304 | } |
| 2305 | |
Viresh Kumar | 442e7a1 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2306 | static void _detach_genpd(struct opp_table *opp_table) |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2307 | { |
| 2308 | int index; |
| 2309 | |
Viresh Kumar | cb60e96 | 2020-08-31 11:22:37 +0530 | [diff] [blame] | 2310 | if (!opp_table->genpd_virt_devs) |
| 2311 | return; |
| 2312 | |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2313 | for (index = 0; index < opp_table->required_opp_count; index++) { |
| 2314 | if (!opp_table->genpd_virt_devs[index]) |
| 2315 | continue; |
| 2316 | |
| 2317 | dev_pm_domain_detach(opp_table->genpd_virt_devs[index], false); |
| 2318 | opp_table->genpd_virt_devs[index] = NULL; |
| 2319 | } |
Viresh Kumar | c0ab9e0 | 2019-05-08 15:43:36 +0530 | [diff] [blame] | 2320 | |
| 2321 | kfree(opp_table->genpd_virt_devs); |
| 2322 | opp_table->genpd_virt_devs = NULL; |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2323 | } |
| 2324 | |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2325 | /** |
Viresh Kumar | 442e7a1 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2326 | * _opp_attach_genpd - Attach genpd(s) for the device and save virtual device pointer |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2327 | * @dev: Consumer device for which the genpd is getting attached. |
| 2328 | * @names: Null terminated array of pointers containing names of genpd to attach. |
Viresh Kumar | 17a8f86 | 2019-07-08 11:24:56 +0530 | [diff] [blame] | 2329 | * @virt_devs: Pointer to return the array of virtual devices. |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2330 | * |
| 2331 | * Multiple generic power domains for a device are supported with the help of |
| 2332 | * virtual genpd devices, which are created for each consumer device - genpd |
| 2333 | * pair. These are the device structures which are attached to the power domain |
| 2334 | * and are required by the OPP core to set the performance state of the genpd. |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2335 | * The same API also works for the case where single genpd is available and so |
| 2336 | * we don't need to support that separately. |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2337 | * |
| 2338 | * This helper will normally be called by the consumer driver of the device |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2339 | * "dev", as only that has details of the genpd names. |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2340 | * |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2341 | * This helper needs to be called once with a list of all genpd to attach. |
| 2342 | * Otherwise the original device structure will be used instead by the OPP core. |
Viresh Kumar | baea35e | 2019-07-17 11:20:17 +0530 | [diff] [blame] | 2343 | * |
| 2344 | * The order of entries in the names array must match the order in which |
| 2345 | * "required-opps" are added in DT. |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2346 | */ |
Viresh Kumar | 442e7a1 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2347 | static int _opp_attach_genpd(struct opp_table *opp_table, struct device *dev, |
| 2348 | const char * const *names, struct device ***virt_devs) |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2349 | { |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2350 | struct device *virt_dev; |
Viresh Kumar | baea35e | 2019-07-17 11:20:17 +0530 | [diff] [blame] | 2351 | int index = 0, ret = -EINVAL; |
Dmitry Osipenko | 3734b9f | 2021-09-27 01:40:24 +0300 | [diff] [blame] | 2352 | const char * const *name = names; |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2353 | |
Viresh Kumar | cb60e96 | 2020-08-31 11:22:37 +0530 | [diff] [blame] | 2354 | if (opp_table->genpd_virt_devs) |
Viresh Kumar | 442e7a1 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2355 | return 0; |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2356 | |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2357 | /* |
| 2358 | * If the genpd's OPP table isn't already initialized, parsing of the |
| 2359 | * required-opps fail for dev. We should retry this after genpd's OPP |
| 2360 | * table is added. |
| 2361 | */ |
Viresh Kumar | 442e7a1 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2362 | if (!opp_table->required_opp_count) |
| 2363 | return -EPROBE_DEFER; |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2364 | |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2365 | mutex_lock(&opp_table->genpd_virt_dev_lock); |
| 2366 | |
Viresh Kumar | c0ab9e0 | 2019-05-08 15:43:36 +0530 | [diff] [blame] | 2367 | opp_table->genpd_virt_devs = kcalloc(opp_table->required_opp_count, |
| 2368 | sizeof(*opp_table->genpd_virt_devs), |
| 2369 | GFP_KERNEL); |
| 2370 | if (!opp_table->genpd_virt_devs) |
| 2371 | goto unlock; |
| 2372 | |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2373 | while (*name) { |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2374 | if (index >= opp_table->required_opp_count) { |
| 2375 | dev_err(dev, "Index can't be greater than required-opp-count - 1, %s (%d : %d)\n", |
| 2376 | *name, opp_table->required_opp_count, index); |
| 2377 | goto err; |
| 2378 | } |
| 2379 | |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2380 | virt_dev = dev_pm_domain_attach_by_name(dev, *name); |
Tang Bin | 4ea9496 | 2022-05-24 20:31:51 +0800 | [diff] [blame] | 2381 | if (IS_ERR_OR_NULL(virt_dev)) { |
| 2382 | ret = PTR_ERR(virt_dev) ? : -ENODEV; |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2383 | dev_err(dev, "Couldn't attach to pm_domain: %d\n", ret); |
| 2384 | goto err; |
| 2385 | } |
| 2386 | |
| 2387 | opp_table->genpd_virt_devs[index] = virt_dev; |
Viresh Kumar | baea35e | 2019-07-17 11:20:17 +0530 | [diff] [blame] | 2388 | index++; |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2389 | name++; |
| 2390 | } |
| 2391 | |
Viresh Kumar | 17a8f86 | 2019-07-08 11:24:56 +0530 | [diff] [blame] | 2392 | if (virt_devs) |
| 2393 | *virt_devs = opp_table->genpd_virt_devs; |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2394 | mutex_unlock(&opp_table->genpd_virt_dev_lock); |
| 2395 | |
Viresh Kumar | 442e7a1 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2396 | return 0; |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2397 | |
| 2398 | err: |
Viresh Kumar | 442e7a1 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2399 | _detach_genpd(opp_table); |
Viresh Kumar | c0ab9e0 | 2019-05-08 15:43:36 +0530 | [diff] [blame] | 2400 | unlock: |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2401 | mutex_unlock(&opp_table->genpd_virt_dev_lock); |
Viresh Kumar | 442e7a1 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2402 | return ret; |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2403 | |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2404 | } |
| 2405 | |
| 2406 | /** |
Viresh Kumar | 442e7a1 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2407 | * _opp_detach_genpd() - Detach genpd(s) from the device. |
| 2408 | * @opp_table: OPP table returned by _opp_attach_genpd(). |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2409 | * |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2410 | * This detaches the genpd(s), resets the virtual device pointers, and puts the |
| 2411 | * OPP table. |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2412 | */ |
Viresh Kumar | 442e7a1 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2413 | static void _opp_detach_genpd(struct opp_table *opp_table) |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2414 | { |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2415 | /* |
| 2416 | * Acquire genpd_virt_dev_lock to make sure virt_dev isn't getting |
| 2417 | * used in parallel. |
| 2418 | */ |
| 2419 | mutex_lock(&opp_table->genpd_virt_dev_lock); |
Viresh Kumar | 442e7a1 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2420 | _detach_genpd(opp_table); |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2421 | mutex_unlock(&opp_table->genpd_virt_dev_lock); |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2422 | } |
Dmitry Osipenko | b4b9e22 | 2021-01-18 03:55:21 +0300 | [diff] [blame] | 2423 | |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2424 | static void _opp_clear_config(struct opp_config_data *data) |
| 2425 | { |
| 2426 | if (data->flags & OPP_CONFIG_GENPD) |
Viresh Kumar | 442e7a1 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2427 | _opp_detach_genpd(data->opp_table); |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2428 | if (data->flags & OPP_CONFIG_REGULATOR) |
Viresh Kumar | b0ec094 | 2022-07-04 16:36:26 +0530 | [diff] [blame] | 2429 | _opp_put_regulators(data->opp_table); |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2430 | if (data->flags & OPP_CONFIG_SUPPORTED_HW) |
Viresh Kumar | 89f0398 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2431 | _opp_put_supported_hw(data->opp_table); |
Viresh Kumar | 1f378c6 | 2022-07-04 14:57:06 +0530 | [diff] [blame] | 2432 | if (data->flags & OPP_CONFIG_REGULATOR_HELPER) |
Viresh Kumar | aee3352 | 2022-07-04 13:45:08 +0530 | [diff] [blame] | 2433 | _opp_put_config_regulators_helper(data->opp_table); |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2434 | if (data->flags & OPP_CONFIG_PROP_NAME) |
Viresh Kumar | 298098e | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2435 | _opp_put_prop_name(data->opp_table); |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2436 | if (data->flags & OPP_CONFIG_CLK) |
Viresh Kumar | 2368f57 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2437 | _opp_put_clknames(data->opp_table); |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2438 | |
| 2439 | dev_pm_opp_put_opp_table(data->opp_table); |
| 2440 | kfree(data); |
| 2441 | } |
| 2442 | |
| 2443 | /** |
| 2444 | * dev_pm_opp_set_config() - Set OPP configuration for the device. |
| 2445 | * @dev: Device for which configuration is being set. |
| 2446 | * @config: OPP configuration. |
| 2447 | * |
| 2448 | * This allows all device OPP configurations to be performed at once. |
| 2449 | * |
| 2450 | * This must be called before any OPPs are initialized for the device. This may |
| 2451 | * be called multiple times for the same OPP table, for example once for each |
| 2452 | * CPU that share the same table. This must be balanced by the same number of |
| 2453 | * calls to dev_pm_opp_clear_config() in order to free the OPP table properly. |
| 2454 | * |
| 2455 | * This returns a token to the caller, which must be passed to |
| 2456 | * dev_pm_opp_clear_config() to free the resources later. The value of the |
| 2457 | * returned token will be >= 1 for success and negative for errors. The minimum |
| 2458 | * value of 1 is chosen here to make it easy for callers to manage the resource. |
| 2459 | */ |
| 2460 | int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config) |
| 2461 | { |
Viresh Kumar | 298098e | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2462 | struct opp_table *opp_table; |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2463 | struct opp_config_data *data; |
| 2464 | unsigned int id; |
| 2465 | int ret; |
| 2466 | |
| 2467 | data = kmalloc(sizeof(*data), GFP_KERNEL); |
| 2468 | if (!data) |
| 2469 | return -ENOMEM; |
| 2470 | |
| 2471 | opp_table = _add_opp_table(dev, false); |
| 2472 | if (IS_ERR(opp_table)) { |
| 2473 | kfree(data); |
| 2474 | return PTR_ERR(opp_table); |
| 2475 | } |
| 2476 | |
| 2477 | data->opp_table = opp_table; |
| 2478 | data->flags = 0; |
| 2479 | |
| 2480 | /* This should be called before OPPs are initialized */ |
| 2481 | if (WARN_ON(!list_empty(&opp_table->opp_list))) { |
| 2482 | ret = -EBUSY; |
| 2483 | goto err; |
| 2484 | } |
| 2485 | |
| 2486 | /* Configure clocks */ |
| 2487 | if (config->clk_names) { |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2488 | ret = _opp_set_clknames(opp_table, dev, config->clk_names, |
| 2489 | config->config_clks); |
Viresh Kumar | 2368f57 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2490 | if (ret) |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2491 | goto err; |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2492 | |
| 2493 | data->flags |= OPP_CONFIG_CLK; |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2494 | } else if (config->config_clks) { |
| 2495 | /* Don't allow config callback without clocks */ |
| 2496 | ret = -EINVAL; |
| 2497 | goto err; |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2498 | } |
| 2499 | |
| 2500 | /* Configure property names */ |
| 2501 | if (config->prop_name) { |
Viresh Kumar | 298098e | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2502 | ret = _opp_set_prop_name(opp_table, config->prop_name); |
| 2503 | if (ret) |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2504 | goto err; |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2505 | |
| 2506 | data->flags |= OPP_CONFIG_PROP_NAME; |
| 2507 | } |
| 2508 | |
Viresh Kumar | aee3352 | 2022-07-04 13:45:08 +0530 | [diff] [blame] | 2509 | /* Configure config_regulators helper */ |
| 2510 | if (config->config_regulators) { |
| 2511 | ret = _opp_set_config_regulators_helper(opp_table, dev, |
| 2512 | config->config_regulators); |
| 2513 | if (ret) |
| 2514 | goto err; |
| 2515 | |
| 2516 | data->flags |= OPP_CONFIG_REGULATOR_HELPER; |
| 2517 | } |
| 2518 | |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2519 | /* Configure supported hardware */ |
| 2520 | if (config->supported_hw) { |
Viresh Kumar | 89f0398 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2521 | ret = _opp_set_supported_hw(opp_table, config->supported_hw, |
| 2522 | config->supported_hw_count); |
| 2523 | if (ret) |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2524 | goto err; |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2525 | |
| 2526 | data->flags |= OPP_CONFIG_SUPPORTED_HW; |
| 2527 | } |
| 2528 | |
| 2529 | /* Configure supplies */ |
| 2530 | if (config->regulator_names) { |
Viresh Kumar | b0ec094 | 2022-07-04 16:36:26 +0530 | [diff] [blame] | 2531 | ret = _opp_set_regulators(opp_table, dev, |
| 2532 | config->regulator_names); |
| 2533 | if (ret) |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2534 | goto err; |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2535 | |
| 2536 | data->flags |= OPP_CONFIG_REGULATOR; |
| 2537 | } |
| 2538 | |
| 2539 | /* Attach genpds */ |
| 2540 | if (config->genpd_names) { |
Viresh Kumar | 442e7a1 | 2022-05-26 09:36:27 +0530 | [diff] [blame] | 2541 | ret = _opp_attach_genpd(opp_table, dev, config->genpd_names, |
| 2542 | config->virt_devs); |
| 2543 | if (ret) |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2544 | goto err; |
Viresh Kumar | 11b9b66 | 2022-05-25 15:23:16 +0530 | [diff] [blame] | 2545 | |
| 2546 | data->flags |= OPP_CONFIG_GENPD; |
| 2547 | } |
| 2548 | |
| 2549 | ret = xa_alloc(&opp_configs, &id, data, XA_LIMIT(1, INT_MAX), |
| 2550 | GFP_KERNEL); |
| 2551 | if (ret) |
| 2552 | goto err; |
| 2553 | |
| 2554 | return id; |
| 2555 | |
| 2556 | err: |
| 2557 | _opp_clear_config(data); |
| 2558 | return ret; |
| 2559 | } |
| 2560 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_config); |
| 2561 | |
| 2562 | /** |
| 2563 | * dev_pm_opp_clear_config() - Releases resources blocked for OPP configuration. |
| 2564 | * @opp_table: OPP table returned from dev_pm_opp_set_config(). |
| 2565 | * |
| 2566 | * This allows all device OPP configurations to be cleared at once. This must be |
| 2567 | * called once for each call made to dev_pm_opp_set_config(), in order to free |
| 2568 | * the OPPs properly. |
| 2569 | * |
| 2570 | * Currently the first call itself ends up freeing all the OPP configurations, |
| 2571 | * while the later ones only drop the OPP table reference. This works well for |
| 2572 | * now as we would never want to use an half initialized OPP table and want to |
| 2573 | * remove the configurations together. |
| 2574 | */ |
| 2575 | void dev_pm_opp_clear_config(int token) |
| 2576 | { |
| 2577 | struct opp_config_data *data; |
| 2578 | |
| 2579 | /* |
| 2580 | * This lets the callers call this unconditionally and keep their code |
| 2581 | * simple. |
| 2582 | */ |
| 2583 | if (unlikely(token <= 0)) |
| 2584 | return; |
| 2585 | |
| 2586 | data = xa_erase(&opp_configs, token); |
| 2587 | if (WARN_ON(!data)) |
| 2588 | return; |
| 2589 | |
| 2590 | _opp_clear_config(data); |
| 2591 | } |
| 2592 | EXPORT_SYMBOL_GPL(dev_pm_opp_clear_config); |
| 2593 | |
| 2594 | static void devm_pm_opp_config_release(void *token) |
| 2595 | { |
| 2596 | dev_pm_opp_clear_config((unsigned long)token); |
| 2597 | } |
| 2598 | |
| 2599 | /** |
| 2600 | * devm_pm_opp_set_config() - Set OPP configuration for the device. |
| 2601 | * @dev: Device for which configuration is being set. |
| 2602 | * @config: OPP configuration. |
| 2603 | * |
| 2604 | * This allows all device OPP configurations to be performed at once. |
| 2605 | * This is a resource-managed variant of dev_pm_opp_set_config(). |
| 2606 | * |
| 2607 | * Return: 0 on success and errorno otherwise. |
| 2608 | */ |
| 2609 | int devm_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config) |
| 2610 | { |
| 2611 | int token = dev_pm_opp_set_config(dev, config); |
| 2612 | |
| 2613 | if (token < 0) |
| 2614 | return token; |
| 2615 | |
| 2616 | return devm_add_action_or_reset(dev, devm_pm_opp_config_release, |
| 2617 | (void *) ((unsigned long) token)); |
| 2618 | } |
| 2619 | EXPORT_SYMBOL_GPL(devm_pm_opp_set_config); |
| 2620 | |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2621 | /** |
Saravana Kannan | 7d8658ef | 2021-02-04 16:14:22 +0800 | [diff] [blame] | 2622 | * dev_pm_opp_xlate_required_opp() - Find required OPP for @src_table OPP. |
| 2623 | * @src_table: OPP table which has @dst_table as one of its required OPP table. |
| 2624 | * @dst_table: Required OPP table of the @src_table. |
| 2625 | * @src_opp: OPP from the @src_table. |
| 2626 | * |
| 2627 | * This function returns the OPP (present in @dst_table) pointed out by the |
| 2628 | * "required-opps" property of the @src_opp (present in @src_table). |
| 2629 | * |
| 2630 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 2631 | * use. |
| 2632 | * |
| 2633 | * Return: pointer to 'struct dev_pm_opp' on success and errorno otherwise. |
| 2634 | */ |
| 2635 | struct dev_pm_opp *dev_pm_opp_xlate_required_opp(struct opp_table *src_table, |
| 2636 | struct opp_table *dst_table, |
| 2637 | struct dev_pm_opp *src_opp) |
| 2638 | { |
| 2639 | struct dev_pm_opp *opp, *dest_opp = ERR_PTR(-ENODEV); |
| 2640 | int i; |
| 2641 | |
| 2642 | if (!src_table || !dst_table || !src_opp || |
| 2643 | !src_table->required_opp_tables) |
| 2644 | return ERR_PTR(-EINVAL); |
| 2645 | |
| 2646 | /* required-opps not fully initialized yet */ |
| 2647 | if (lazy_linking_pending(src_table)) |
| 2648 | return ERR_PTR(-EBUSY); |
| 2649 | |
| 2650 | for (i = 0; i < src_table->required_opp_count; i++) { |
| 2651 | if (src_table->required_opp_tables[i] == dst_table) { |
| 2652 | mutex_lock(&src_table->lock); |
| 2653 | |
| 2654 | list_for_each_entry(opp, &src_table->opp_list, node) { |
| 2655 | if (opp == src_opp) { |
| 2656 | dest_opp = opp->required_opps[i]; |
| 2657 | dev_pm_opp_get(dest_opp); |
| 2658 | break; |
| 2659 | } |
| 2660 | } |
| 2661 | |
| 2662 | mutex_unlock(&src_table->lock); |
| 2663 | break; |
| 2664 | } |
| 2665 | } |
| 2666 | |
| 2667 | if (IS_ERR(dest_opp)) { |
| 2668 | pr_err("%s: Couldn't find matching OPP (%p: %p)\n", __func__, |
| 2669 | src_table, dst_table); |
| 2670 | } |
| 2671 | |
| 2672 | return dest_opp; |
| 2673 | } |
| 2674 | EXPORT_SYMBOL_GPL(dev_pm_opp_xlate_required_opp); |
| 2675 | |
| 2676 | /** |
Viresh Kumar | c8a5910 | 2018-11-02 14:36:42 +0530 | [diff] [blame] | 2677 | * dev_pm_opp_xlate_performance_state() - Find required OPP's pstate for src_table. |
| 2678 | * @src_table: OPP table which has dst_table as one of its required OPP table. |
| 2679 | * @dst_table: Required OPP table of the src_table. |
| 2680 | * @pstate: Current performance state of the src_table. |
| 2681 | * |
| 2682 | * This Returns pstate of the OPP (present in @dst_table) pointed out by the |
| 2683 | * "required-opps" property of the OPP (present in @src_table) which has |
| 2684 | * performance state set to @pstate. |
| 2685 | * |
| 2686 | * Return: Zero or positive performance state on success, otherwise negative |
| 2687 | * value on errors. |
| 2688 | */ |
| 2689 | int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, |
| 2690 | struct opp_table *dst_table, |
| 2691 | unsigned int pstate) |
| 2692 | { |
| 2693 | struct dev_pm_opp *opp; |
| 2694 | int dest_pstate = -EINVAL; |
| 2695 | int i; |
| 2696 | |
Viresh Kumar | c8a5910 | 2018-11-02 14:36:42 +0530 | [diff] [blame] | 2697 | /* |
| 2698 | * Normally the src_table will have the "required_opps" property set to |
| 2699 | * point to one of the OPPs in the dst_table, but in some cases the |
| 2700 | * genpd and its master have one to one mapping of performance states |
| 2701 | * and so none of them have the "required-opps" property set. Return the |
| 2702 | * pstate of the src_table as it is in such cases. |
| 2703 | */ |
Dmitry Osipenko | f2f4d2b | 2021-01-18 03:55:23 +0300 | [diff] [blame] | 2704 | if (!src_table || !src_table->required_opp_count) |
Viresh Kumar | c8a5910 | 2018-11-02 14:36:42 +0530 | [diff] [blame] | 2705 | return pstate; |
| 2706 | |
Viresh Kumar | 84cb7ff | 2023-06-14 15:57:43 +0530 | [diff] [blame] | 2707 | /* Both OPP tables must belong to genpds */ |
| 2708 | if (unlikely(!src_table->is_genpd || !dst_table->is_genpd)) { |
| 2709 | pr_err("%s: Performance state is only valid for genpds.\n", __func__); |
| 2710 | return -EINVAL; |
| 2711 | } |
| 2712 | |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 2713 | /* required-opps not fully initialized yet */ |
| 2714 | if (lazy_linking_pending(src_table)) |
| 2715 | return -EBUSY; |
| 2716 | |
Viresh Kumar | c8a5910 | 2018-11-02 14:36:42 +0530 | [diff] [blame] | 2717 | for (i = 0; i < src_table->required_opp_count; i++) { |
| 2718 | if (src_table->required_opp_tables[i]->np == dst_table->np) |
| 2719 | break; |
| 2720 | } |
| 2721 | |
| 2722 | if (unlikely(i == src_table->required_opp_count)) { |
| 2723 | pr_err("%s: Couldn't find matching OPP table (%p: %p)\n", |
| 2724 | __func__, src_table, dst_table); |
| 2725 | return -EINVAL; |
| 2726 | } |
| 2727 | |
| 2728 | mutex_lock(&src_table->lock); |
| 2729 | |
| 2730 | list_for_each_entry(opp, &src_table->opp_list, node) { |
Viresh Kumar | 7c41cdc | 2023-06-14 15:29:32 +0530 | [diff] [blame] | 2731 | if (opp->level == pstate) { |
| 2732 | dest_pstate = opp->required_opps[i]->level; |
Viresh Kumar | c8a5910 | 2018-11-02 14:36:42 +0530 | [diff] [blame] | 2733 | goto unlock; |
| 2734 | } |
| 2735 | } |
| 2736 | |
| 2737 | pr_err("%s: Couldn't find matching OPP (%p: %p)\n", __func__, src_table, |
| 2738 | dst_table); |
| 2739 | |
| 2740 | unlock: |
| 2741 | mutex_unlock(&src_table->lock); |
| 2742 | |
| 2743 | return dest_pstate; |
| 2744 | } |
| 2745 | |
| 2746 | /** |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2747 | * dev_pm_opp_add() - Add an OPP table from a table definitions |
| 2748 | * @dev: device for which we do this operation |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 2749 | * @freq: Frequency in Hz for this OPP |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2750 | * @u_volt: Voltage in uVolts for this OPP |
| 2751 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 2752 | * This function adds an opp definition to the opp table and returns status. |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 2753 | * The opp is made available by default and it can be controlled using |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2754 | * dev_pm_opp_enable/disable functions. |
| 2755 | * |
Viresh Kumar | a7470db | 2014-11-25 16:04:17 +0530 | [diff] [blame] | 2756 | * Return: |
| 2757 | * 0 On success OR |
| 2758 | * Duplicate OPPs (both freq and volt are same) and opp->available |
| 2759 | * -EEXIST Freq are same and volt are different OR |
| 2760 | * Duplicate OPPs (both freq and volt are same) and !opp->available |
Viresh Kumar | 38393409 | 2014-11-25 16:04:18 +0530 | [diff] [blame] | 2761 | * -ENOMEM Memory allocation failure |
Viresh Kumar | a7470db | 2014-11-25 16:04:17 +0530 | [diff] [blame] | 2762 | */ |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2763 | int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt) |
| 2764 | { |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 2765 | struct opp_table *opp_table; |
| 2766 | int ret; |
| 2767 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 2768 | opp_table = _add_opp_table(dev, true); |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 2769 | if (IS_ERR(opp_table)) |
| 2770 | return PTR_ERR(opp_table); |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 2771 | |
Viresh Kumar | 46f48ac | 2018-12-11 16:39:36 +0530 | [diff] [blame] | 2772 | /* Fix regulator count for dynamic OPPs */ |
| 2773 | opp_table->regulator_count = 1; |
| 2774 | |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 2775 | ret = _opp_add_v1(opp_table, dev, freq, u_volt, true); |
Viresh Kumar | 0ad8c62 | 2018-08-02 14:23:09 +0530 | [diff] [blame] | 2776 | if (ret) |
| 2777 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 2778 | |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 2779 | return ret; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2780 | } |
| 2781 | EXPORT_SYMBOL_GPL(dev_pm_opp_add); |
| 2782 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2783 | /** |
Nishanth Menon | 327854c | 2014-12-24 11:22:56 -0600 | [diff] [blame] | 2784 | * _opp_set_availability() - helper to set the availability of an opp |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2785 | * @dev: device for which we do this operation |
| 2786 | * @freq: OPP frequency to modify availability |
| 2787 | * @availability_req: availability status requested for this opp |
| 2788 | * |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 2789 | * Set the availability of an OPP, opp_{enable,disable} share a common logic |
| 2790 | * which is isolated here. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2791 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 2792 | * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the |
Stephen Boyd | e1a2d49 | 2015-09-24 12:28:44 -0700 | [diff] [blame] | 2793 | * copy operation, returns 0 if no modification was done OR modification was |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2794 | * successful. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2795 | */ |
Nishanth Menon | 327854c | 2014-12-24 11:22:56 -0600 | [diff] [blame] | 2796 | static int _opp_set_availability(struct device *dev, unsigned long freq, |
| 2797 | bool availability_req) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2798 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 2799 | struct opp_table *opp_table; |
Viresh Kumar | a7f3987 | 2017-01-23 10:11:50 +0530 | [diff] [blame] | 2800 | struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2801 | int r = 0; |
| 2802 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 2803 | /* Find the opp_table */ |
| 2804 | opp_table = _find_opp_table(dev); |
| 2805 | if (IS_ERR(opp_table)) { |
| 2806 | r = PTR_ERR(opp_table); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2807 | dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r); |
Viresh Kumar | a7f3987 | 2017-01-23 10:11:50 +0530 | [diff] [blame] | 2808 | return r; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2809 | } |
| 2810 | |
Viresh Kumar | f123ea7 | 2022-06-10 10:27:51 +0530 | [diff] [blame] | 2811 | if (!assert_single_clk(opp_table)) { |
| 2812 | r = -EINVAL; |
| 2813 | goto put_table; |
| 2814 | } |
| 2815 | |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 2816 | mutex_lock(&opp_table->lock); |
| 2817 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2818 | /* Do we have the frequency? */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 2819 | list_for_each_entry(tmp_opp, &opp_table->opp_list, node) { |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2820 | if (tmp_opp->rates[0] == freq) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2821 | opp = tmp_opp; |
| 2822 | break; |
| 2823 | } |
| 2824 | } |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 2825 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2826 | if (IS_ERR(opp)) { |
| 2827 | r = PTR_ERR(opp); |
| 2828 | goto unlock; |
| 2829 | } |
| 2830 | |
| 2831 | /* Is update really needed? */ |
| 2832 | if (opp->available == availability_req) |
| 2833 | goto unlock; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2834 | |
Viresh Kumar | a7f3987 | 2017-01-23 10:11:50 +0530 | [diff] [blame] | 2835 | opp->available = availability_req; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2836 | |
Viresh Kumar | e4d8ae0 | 2017-09-21 10:44:36 -0700 | [diff] [blame] | 2837 | dev_pm_opp_get(opp); |
| 2838 | mutex_unlock(&opp_table->lock); |
| 2839 | |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 2840 | /* Notify the change of the OPP availability */ |
| 2841 | if (availability_req) |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 2842 | blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ENABLE, |
Viresh Kumar | a7f3987 | 2017-01-23 10:11:50 +0530 | [diff] [blame] | 2843 | opp); |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 2844 | else |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 2845 | blocking_notifier_call_chain(&opp_table->head, |
Viresh Kumar | a7f3987 | 2017-01-23 10:11:50 +0530 | [diff] [blame] | 2846 | OPP_EVENT_DISABLE, opp); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2847 | |
Viresh Kumar | e4d8ae0 | 2017-09-21 10:44:36 -0700 | [diff] [blame] | 2848 | dev_pm_opp_put(opp); |
| 2849 | goto put_table; |
| 2850 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2851 | unlock: |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 2852 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | e4d8ae0 | 2017-09-21 10:44:36 -0700 | [diff] [blame] | 2853 | put_table: |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 2854 | dev_pm_opp_put_opp_table(opp_table); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2855 | return r; |
| 2856 | } |
| 2857 | |
| 2858 | /** |
Stephen Boyd | 25cb20a | 2019-10-16 16:57:53 +0200 | [diff] [blame] | 2859 | * dev_pm_opp_adjust_voltage() - helper to change the voltage of an OPP |
| 2860 | * @dev: device for which we do this operation |
| 2861 | * @freq: OPP frequency to adjust voltage of |
| 2862 | * @u_volt: new OPP target voltage |
| 2863 | * @u_volt_min: new OPP min voltage |
| 2864 | * @u_volt_max: new OPP max voltage |
| 2865 | * |
| 2866 | * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the |
| 2867 | * copy operation, returns 0 if no modifcation was done OR modification was |
| 2868 | * successful. |
| 2869 | */ |
| 2870 | int dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq, |
| 2871 | unsigned long u_volt, unsigned long u_volt_min, |
| 2872 | unsigned long u_volt_max) |
| 2873 | |
| 2874 | { |
| 2875 | struct opp_table *opp_table; |
| 2876 | struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV); |
| 2877 | int r = 0; |
| 2878 | |
| 2879 | /* Find the opp_table */ |
| 2880 | opp_table = _find_opp_table(dev); |
| 2881 | if (IS_ERR(opp_table)) { |
| 2882 | r = PTR_ERR(opp_table); |
| 2883 | dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r); |
| 2884 | return r; |
| 2885 | } |
| 2886 | |
Viresh Kumar | f123ea7 | 2022-06-10 10:27:51 +0530 | [diff] [blame] | 2887 | if (!assert_single_clk(opp_table)) { |
| 2888 | r = -EINVAL; |
| 2889 | goto put_table; |
| 2890 | } |
| 2891 | |
Stephen Boyd | 25cb20a | 2019-10-16 16:57:53 +0200 | [diff] [blame] | 2892 | mutex_lock(&opp_table->lock); |
| 2893 | |
| 2894 | /* Do we have the frequency? */ |
| 2895 | list_for_each_entry(tmp_opp, &opp_table->opp_list, node) { |
Viresh Kumar | 2083da2 | 2022-06-10 12:02:04 +0530 | [diff] [blame] | 2896 | if (tmp_opp->rates[0] == freq) { |
Stephen Boyd | 25cb20a | 2019-10-16 16:57:53 +0200 | [diff] [blame] | 2897 | opp = tmp_opp; |
| 2898 | break; |
| 2899 | } |
| 2900 | } |
| 2901 | |
| 2902 | if (IS_ERR(opp)) { |
| 2903 | r = PTR_ERR(opp); |
| 2904 | goto adjust_unlock; |
| 2905 | } |
| 2906 | |
| 2907 | /* Is update really needed? */ |
| 2908 | if (opp->supplies->u_volt == u_volt) |
| 2909 | goto adjust_unlock; |
| 2910 | |
| 2911 | opp->supplies->u_volt = u_volt; |
| 2912 | opp->supplies->u_volt_min = u_volt_min; |
| 2913 | opp->supplies->u_volt_max = u_volt_max; |
| 2914 | |
| 2915 | dev_pm_opp_get(opp); |
| 2916 | mutex_unlock(&opp_table->lock); |
| 2917 | |
| 2918 | /* Notify the voltage change of the OPP */ |
| 2919 | blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADJUST_VOLTAGE, |
| 2920 | opp); |
| 2921 | |
| 2922 | dev_pm_opp_put(opp); |
Viresh Kumar | f123ea7 | 2022-06-10 10:27:51 +0530 | [diff] [blame] | 2923 | goto put_table; |
Stephen Boyd | 25cb20a | 2019-10-16 16:57:53 +0200 | [diff] [blame] | 2924 | |
| 2925 | adjust_unlock: |
| 2926 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | f123ea7 | 2022-06-10 10:27:51 +0530 | [diff] [blame] | 2927 | put_table: |
Stephen Boyd | 25cb20a | 2019-10-16 16:57:53 +0200 | [diff] [blame] | 2928 | dev_pm_opp_put_opp_table(opp_table); |
| 2929 | return r; |
| 2930 | } |
Valdis Klētnieks | 0364915 | 2020-06-20 13:03:22 -0400 | [diff] [blame] | 2931 | EXPORT_SYMBOL_GPL(dev_pm_opp_adjust_voltage); |
Stephen Boyd | 25cb20a | 2019-10-16 16:57:53 +0200 | [diff] [blame] | 2932 | |
| 2933 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 2934 | * dev_pm_opp_enable() - Enable a specific OPP |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2935 | * @dev: device for which we do this operation |
| 2936 | * @freq: OPP frequency to enable |
| 2937 | * |
| 2938 | * Enables a provided opp. If the operation is valid, this returns 0, else the |
| 2939 | * corresponding error value. It is meant to be used for users an OPP available |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 2940 | * after being temporarily made unavailable with dev_pm_opp_disable. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2941 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 2942 | * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the |
Stephen Boyd | e1a2d49 | 2015-09-24 12:28:44 -0700 | [diff] [blame] | 2943 | * copy operation, returns 0 if no modification was done OR modification was |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 2944 | * successful. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2945 | */ |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 2946 | int dev_pm_opp_enable(struct device *dev, unsigned long freq) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2947 | { |
Nishanth Menon | 327854c | 2014-12-24 11:22:56 -0600 | [diff] [blame] | 2948 | return _opp_set_availability(dev, freq, true); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2949 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 2950 | EXPORT_SYMBOL_GPL(dev_pm_opp_enable); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2951 | |
| 2952 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 2953 | * dev_pm_opp_disable() - Disable a specific OPP |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2954 | * @dev: device for which we do this operation |
| 2955 | * @freq: OPP frequency to disable |
| 2956 | * |
| 2957 | * Disables a provided opp. If the operation is valid, this returns |
| 2958 | * 0, else the corresponding error value. It is meant to be a temporary |
| 2959 | * control by users to make this OPP not available until the circumstances are |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 2960 | * right to make it available again (with a call to dev_pm_opp_enable). |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2961 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 2962 | * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the |
Stephen Boyd | e1a2d49 | 2015-09-24 12:28:44 -0700 | [diff] [blame] | 2963 | * copy operation, returns 0 if no modification was done OR modification was |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 2964 | * successful. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2965 | */ |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 2966 | int dev_pm_opp_disable(struct device *dev, unsigned long freq) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2967 | { |
Nishanth Menon | 327854c | 2014-12-24 11:22:56 -0600 | [diff] [blame] | 2968 | return _opp_set_availability(dev, freq, false); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2969 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 2970 | EXPORT_SYMBOL_GPL(dev_pm_opp_disable); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2971 | |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 2972 | /** |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2973 | * dev_pm_opp_register_notifier() - Register OPP notifier for the device |
| 2974 | * @dev: Device for which notifier needs to be registered |
| 2975 | * @nb: Notifier block to be registered |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 2976 | * |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2977 | * Return: 0 on success or a negative error value. |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 2978 | */ |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2979 | int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb) |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 2980 | { |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2981 | struct opp_table *opp_table; |
| 2982 | int ret; |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 2983 | |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2984 | opp_table = _find_opp_table(dev); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 2985 | if (IS_ERR(opp_table)) |
| 2986 | return PTR_ERR(opp_table); |
| 2987 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 2988 | ret = blocking_notifier_chain_register(&opp_table->head, nb); |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2989 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 2990 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2991 | |
| 2992 | return ret; |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 2993 | } |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2994 | EXPORT_SYMBOL(dev_pm_opp_register_notifier); |
| 2995 | |
| 2996 | /** |
| 2997 | * dev_pm_opp_unregister_notifier() - Unregister OPP notifier for the device |
| 2998 | * @dev: Device for which notifier needs to be unregistered |
| 2999 | * @nb: Notifier block to be unregistered |
| 3000 | * |
| 3001 | * Return: 0 on success or a negative error value. |
| 3002 | */ |
| 3003 | int dev_pm_opp_unregister_notifier(struct device *dev, |
| 3004 | struct notifier_block *nb) |
| 3005 | { |
| 3006 | struct opp_table *opp_table; |
| 3007 | int ret; |
| 3008 | |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 3009 | opp_table = _find_opp_table(dev); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 3010 | if (IS_ERR(opp_table)) |
| 3011 | return PTR_ERR(opp_table); |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 3012 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 3013 | ret = blocking_notifier_chain_unregister(&opp_table->head, nb); |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 3014 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 3015 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 3016 | |
| 3017 | return ret; |
| 3018 | } |
| 3019 | EXPORT_SYMBOL(dev_pm_opp_unregister_notifier); |
Shawn Guo | b496dfb | 2012-09-05 01:09:12 +0200 | [diff] [blame] | 3020 | |
Viresh Kumar | 8aaf626 | 2020-08-20 13:18:23 +0530 | [diff] [blame] | 3021 | /** |
| 3022 | * dev_pm_opp_remove_table() - Free all OPPs associated with the device |
| 3023 | * @dev: device pointer used to lookup OPP table. |
| 3024 | * |
| 3025 | * Free both OPPs created using static entries present in DT and the |
| 3026 | * dynamically added entries. |
| 3027 | */ |
| 3028 | void dev_pm_opp_remove_table(struct device *dev) |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 3029 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 3030 | struct opp_table *opp_table; |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 3031 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 3032 | /* Check for existing table for 'dev' */ |
| 3033 | opp_table = _find_opp_table(dev); |
| 3034 | if (IS_ERR(opp_table)) { |
| 3035 | int error = PTR_ERR(opp_table); |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 3036 | |
| 3037 | if (error != -ENODEV) |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 3038 | WARN(1, "%s: opp_table: %d\n", |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 3039 | IS_ERR_OR_NULL(dev) ? |
| 3040 | "Invalid device" : dev_name(dev), |
| 3041 | error); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 3042 | return; |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 3043 | } |
| 3044 | |
Viresh Kumar | 922ff07 | 2020-08-31 13:03:06 +0530 | [diff] [blame] | 3045 | /* |
| 3046 | * Drop the extra reference only if the OPP table was successfully added |
| 3047 | * with dev_pm_opp_of_add_table() earlier. |
| 3048 | **/ |
| 3049 | if (_opp_remove_all_static(opp_table)) |
| 3050 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 3051 | |
Viresh Kumar | cdd6ed9 | 2018-09-12 12:35:19 +0530 | [diff] [blame] | 3052 | /* Drop reference taken by _find_opp_table() */ |
| 3053 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 3054 | } |
Sudeep Holla | 411466c | 2016-05-03 15:05:04 +0100 | [diff] [blame] | 3055 | EXPORT_SYMBOL_GPL(dev_pm_opp_remove_table); |
Dmitry Osipenko | ce8073d | 2021-01-21 01:26:47 +0300 | [diff] [blame] | 3056 | |
| 3057 | /** |
| 3058 | * dev_pm_opp_sync_regulators() - Sync state of voltage regulators |
| 3059 | * @dev: device for which we do this operation |
| 3060 | * |
| 3061 | * Sync voltage state of the OPP table regulators. |
| 3062 | * |
| 3063 | * Return: 0 on success or a negative error value. |
| 3064 | */ |
| 3065 | int dev_pm_opp_sync_regulators(struct device *dev) |
| 3066 | { |
| 3067 | struct opp_table *opp_table; |
| 3068 | struct regulator *reg; |
| 3069 | int i, ret = 0; |
| 3070 | |
| 3071 | /* Device may not have OPP table */ |
| 3072 | opp_table = _find_opp_table(dev); |
| 3073 | if (IS_ERR(opp_table)) |
| 3074 | return 0; |
| 3075 | |
| 3076 | /* Regulator may not be required for the device */ |
| 3077 | if (unlikely(!opp_table->regulators)) |
| 3078 | goto put_table; |
| 3079 | |
| 3080 | /* Nothing to sync if voltage wasn't changed */ |
| 3081 | if (!opp_table->enabled) |
| 3082 | goto put_table; |
| 3083 | |
| 3084 | for (i = 0; i < opp_table->regulator_count; i++) { |
| 3085 | reg = opp_table->regulators[i]; |
| 3086 | ret = regulator_sync_voltage(reg); |
| 3087 | if (ret) |
| 3088 | break; |
| 3089 | } |
| 3090 | put_table: |
| 3091 | /* Drop reference taken by _find_opp_table() */ |
| 3092 | dev_pm_opp_put_opp_table(opp_table); |
| 3093 | |
| 3094 | return ret; |
| 3095 | } |
| 3096 | EXPORT_SYMBOL_GPL(dev_pm_opp_sync_regulators); |