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> |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 16 | #include <linux/slab.h> |
Paul Gortmaker | 51990e8 | 2012-01-22 11:23:42 -0500 | [diff] [blame] | 17 | #include <linux/device.h> |
Liam Girdwood | 80126ce | 2012-10-23 01:27:44 +0200 | [diff] [blame] | 18 | #include <linux/export.h> |
Viresh Kumar | 009acd1 | 2017-10-11 12:54:14 +0530 | [diff] [blame] | 19 | #include <linux/pm_domain.h> |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 20 | #include <linux/regulator/consumer.h> |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 21 | |
Viresh Kumar | f59d3ee | 2015-09-04 13:47:26 +0530 | [diff] [blame] | 22 | #include "opp.h" |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 23 | |
| 24 | /* |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 25 | * The root of the list of all opp-tables. All opp_table structures branch off |
| 26 | * 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] | 27 | * various states of availability. |
| 28 | */ |
Viresh Kumar | f47b72a | 2016-05-05 16:20:33 +0530 | [diff] [blame] | 29 | LIST_HEAD(opp_tables); |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 30 | |
| 31 | /* OPP tables with uninitialized required OPPs */ |
| 32 | LIST_HEAD(lazy_opp_tables); |
| 33 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 34 | /* Lock to allow exclusive modification to the device and opp lists */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 35 | DEFINE_MUTEX(opp_table_lock); |
Viresh Kumar | 27c0948 | 2020-10-27 16:53:21 +0530 | [diff] [blame] | 36 | /* Flag indicating that opp_tables list is being updated at the moment */ |
| 37 | static bool opp_tables_busy; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 38 | |
Viresh Kumar | 9e62eda | 2020-10-27 11:49:03 +0530 | [diff] [blame] | 39 | 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] | 40 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 41 | struct opp_device *opp_dev; |
Viresh Kumar | 9e62eda | 2020-10-27 11:49:03 +0530 | [diff] [blame] | 42 | bool found = false; |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 43 | |
Viresh Kumar | 9e62eda | 2020-10-27 11:49:03 +0530 | [diff] [blame] | 44 | mutex_lock(&opp_table->lock); |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 45 | list_for_each_entry(opp_dev, &opp_table->dev_list, node) |
Viresh Kumar | 9e62eda | 2020-10-27 11:49:03 +0530 | [diff] [blame] | 46 | if (opp_dev->dev == dev) { |
| 47 | found = true; |
| 48 | break; |
| 49 | } |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 50 | |
Viresh Kumar | 9e62eda | 2020-10-27 11:49:03 +0530 | [diff] [blame] | 51 | mutex_unlock(&opp_table->lock); |
| 52 | return found; |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 53 | } |
| 54 | |
Wei Yongjun | 6ac4239 | 2017-02-06 14:29:55 +0000 | [diff] [blame] | 55 | static struct opp_table *_find_opp_table_unlocked(struct device *dev) |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 56 | { |
| 57 | struct opp_table *opp_table; |
| 58 | |
| 59 | list_for_each_entry(opp_table, &opp_tables, node) { |
Viresh Kumar | 9e62eda | 2020-10-27 11:49:03 +0530 | [diff] [blame] | 60 | if (_find_opp_dev(dev, opp_table)) { |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 61 | _get_opp_table_kref(opp_table); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 62 | return opp_table; |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | return ERR_PTR(-ENODEV); |
| 67 | } |
| 68 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 69 | /** |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 70 | * _find_opp_table() - find opp_table struct using device pointer |
| 71 | * @dev: device pointer used to lookup OPP table |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 72 | * |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 73 | * Search OPP table for one containing matching device. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 74 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 75 | * Return: pointer to 'struct opp_table' if found, otherwise -ENODEV or |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 76 | * -EINVAL based on type of error. |
| 77 | * |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 78 | * 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] | 79 | */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 80 | struct opp_table *_find_opp_table(struct device *dev) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 81 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 82 | struct opp_table *opp_table; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 83 | |
Viresh Kumar | 50a3cb0 | 2015-08-12 15:59:39 +0530 | [diff] [blame] | 84 | if (IS_ERR_OR_NULL(dev)) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 85 | pr_err("%s: Invalid parameters\n", __func__); |
| 86 | return ERR_PTR(-EINVAL); |
| 87 | } |
| 88 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 89 | mutex_lock(&opp_table_lock); |
| 90 | opp_table = _find_opp_table_unlocked(dev); |
| 91 | mutex_unlock(&opp_table_lock); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 92 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 93 | return opp_table; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | /** |
Linus Torvalds | baf51c4 | 2015-11-11 09:03:01 -0800 | [diff] [blame] | 97 | * dev_pm_opp_get_voltage() - Gets the voltage corresponding to an opp |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 98 | * @opp: opp for which voltage has to be returned for |
| 99 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 100 | * Return: voltage in micro volt corresponding to the opp, else |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 101 | * return 0 |
| 102 | * |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 103 | * This is useful only for devices with single power supply. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 104 | */ |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 105 | unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 106 | { |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 107 | if (IS_ERR_OR_NULL(opp)) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 108 | pr_err("%s: Invalid parameters\n", __func__); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 109 | return 0; |
| 110 | } |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 111 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 112 | return opp->supplies[0].u_volt; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 113 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 114 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_voltage); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 115 | |
| 116 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 117 | * 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] | 118 | * @opp: opp for which frequency has to be returned for |
| 119 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 120 | * Return: frequency in hertz corresponding to the opp, else |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 121 | * return 0 |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 122 | */ |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 123 | unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 124 | { |
Andrew-sh.Cheng | 06a8a05 | 2020-07-20 16:55:26 +0800 | [diff] [blame] | 125 | if (IS_ERR_OR_NULL(opp)) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 126 | pr_err("%s: Invalid parameters\n", __func__); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 127 | return 0; |
| 128 | } |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 129 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 130 | return opp->rate; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 131 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 132 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 133 | |
| 134 | /** |
Rajendra Nayak | 5b93ac5 | 2019-01-10 09:32:02 +0530 | [diff] [blame] | 135 | * dev_pm_opp_get_level() - Gets the level corresponding to an available opp |
| 136 | * @opp: opp for which level value has to be returned for |
| 137 | * |
| 138 | * Return: level read from device tree corresponding to the opp, else |
| 139 | * return 0. |
| 140 | */ |
| 141 | unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp) |
| 142 | { |
| 143 | if (IS_ERR_OR_NULL(opp) || !opp->available) { |
| 144 | pr_err("%s: Invalid parameters\n", __func__); |
| 145 | return 0; |
| 146 | } |
| 147 | |
| 148 | return opp->level; |
| 149 | } |
| 150 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_level); |
| 151 | |
| 152 | /** |
Dmitry Osipenko | 597ff54 | 2021-01-18 03:55:19 +0300 | [diff] [blame] | 153 | * dev_pm_opp_get_required_pstate() - Gets the required performance state |
| 154 | * corresponding to an available opp |
| 155 | * @opp: opp for which performance state has to be returned for |
| 156 | * @index: index of the required opp |
| 157 | * |
| 158 | * Return: performance state read from device tree corresponding to the |
| 159 | * required opp, else return 0. |
| 160 | */ |
| 161 | unsigned int dev_pm_opp_get_required_pstate(struct dev_pm_opp *opp, |
| 162 | unsigned int index) |
| 163 | { |
| 164 | if (IS_ERR_OR_NULL(opp) || !opp->available || |
| 165 | index >= opp->opp_table->required_opp_count) { |
| 166 | pr_err("%s: Invalid parameters\n", __func__); |
| 167 | return 0; |
| 168 | } |
| 169 | |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 170 | /* required-opps not fully initialized yet */ |
| 171 | if (lazy_linking_pending(opp->opp_table)) |
| 172 | return 0; |
| 173 | |
Dmitry Osipenko | 597ff54 | 2021-01-18 03:55:19 +0300 | [diff] [blame] | 174 | return opp->required_opps[index]->pstate; |
| 175 | } |
| 176 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_required_pstate); |
| 177 | |
| 178 | /** |
Bartlomiej Zolnierkiewicz | 19445b2 | 2015-07-09 17:43:35 +0200 | [diff] [blame] | 179 | * dev_pm_opp_is_turbo() - Returns if opp is turbo OPP or not |
| 180 | * @opp: opp for which turbo mode is being verified |
| 181 | * |
| 182 | * Turbo OPPs are not for normal use, and can be enabled (under certain |
| 183 | * conditions) for short duration of times to finish high throughput work |
| 184 | * quickly. Running on them for longer times may overheat the chip. |
| 185 | * |
| 186 | * Return: true if opp is turbo opp, else false. |
Bartlomiej Zolnierkiewicz | 19445b2 | 2015-07-09 17:43:35 +0200 | [diff] [blame] | 187 | */ |
| 188 | bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp) |
| 189 | { |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 190 | if (IS_ERR_OR_NULL(opp) || !opp->available) { |
Bartlomiej Zolnierkiewicz | 19445b2 | 2015-07-09 17:43:35 +0200 | [diff] [blame] | 191 | pr_err("%s: Invalid parameters\n", __func__); |
| 192 | return false; |
| 193 | } |
| 194 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 195 | return opp->turbo; |
Bartlomiej Zolnierkiewicz | 19445b2 | 2015-07-09 17:43:35 +0200 | [diff] [blame] | 196 | } |
| 197 | EXPORT_SYMBOL_GPL(dev_pm_opp_is_turbo); |
| 198 | |
| 199 | /** |
Viresh Kumar | 3ca9bb3 | 2015-07-29 16:23:03 +0530 | [diff] [blame] | 200 | * dev_pm_opp_get_max_clock_latency() - Get max clock latency in nanoseconds |
| 201 | * @dev: device for which we do this operation |
| 202 | * |
| 203 | * Return: This function returns the max clock latency in nanoseconds. |
Viresh Kumar | 3ca9bb3 | 2015-07-29 16:23:03 +0530 | [diff] [blame] | 204 | */ |
| 205 | unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev) |
| 206 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 207 | struct opp_table *opp_table; |
Viresh Kumar | 3ca9bb3 | 2015-07-29 16:23:03 +0530 | [diff] [blame] | 208 | unsigned long clock_latency_ns; |
| 209 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 210 | opp_table = _find_opp_table(dev); |
| 211 | if (IS_ERR(opp_table)) |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 212 | return 0; |
Viresh Kumar | 3ca9bb3 | 2015-07-29 16:23:03 +0530 | [diff] [blame] | 213 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 214 | clock_latency_ns = opp_table->clock_latency_ns_max; |
| 215 | |
| 216 | dev_pm_opp_put_opp_table(opp_table); |
| 217 | |
Viresh Kumar | 3ca9bb3 | 2015-07-29 16:23:03 +0530 | [diff] [blame] | 218 | return clock_latency_ns; |
| 219 | } |
| 220 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_clock_latency); |
| 221 | |
| 222 | /** |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 223 | * dev_pm_opp_get_max_volt_latency() - Get max voltage latency in nanoseconds |
| 224 | * @dev: device for which we do this operation |
| 225 | * |
| 226 | * Return: This function returns the max voltage latency in nanoseconds. |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 227 | */ |
| 228 | unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev) |
| 229 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 230 | struct opp_table *opp_table; |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 231 | struct dev_pm_opp *opp; |
Viresh Kumar | 478256b | 2017-05-23 09:32:11 +0530 | [diff] [blame] | 232 | struct regulator *reg; |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 233 | unsigned long latency_ns = 0; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 234 | int ret, i, count; |
| 235 | struct { |
| 236 | unsigned long min; |
| 237 | unsigned long max; |
| 238 | } *uV; |
| 239 | |
Viresh Kumar | cdd3e61 | 2017-01-23 10:11:51 +0530 | [diff] [blame] | 240 | opp_table = _find_opp_table(dev); |
| 241 | if (IS_ERR(opp_table)) |
| 242 | return 0; |
| 243 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 244 | /* Regulator may not be required for the device */ |
Viresh Kumar | 90e3577 | 2018-12-11 16:32:47 +0530 | [diff] [blame] | 245 | if (!opp_table->regulators) |
Viresh Kumar | cdd3e61 | 2017-01-23 10:11:51 +0530 | [diff] [blame] | 246 | goto put_opp_table; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 247 | |
Viresh Kumar | 90e3577 | 2018-12-11 16:32:47 +0530 | [diff] [blame] | 248 | count = opp_table->regulator_count; |
| 249 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 250 | uV = kmalloc_array(count, sizeof(*uV), GFP_KERNEL); |
| 251 | if (!uV) |
Viresh Kumar | 478256b | 2017-05-23 09:32:11 +0530 | [diff] [blame] | 252 | goto put_opp_table; |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 253 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 254 | mutex_lock(&opp_table->lock); |
| 255 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 256 | for (i = 0; i < count; i++) { |
| 257 | uV[i].min = ~0; |
| 258 | uV[i].max = 0; |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 259 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 260 | list_for_each_entry(opp, &opp_table->opp_list, node) { |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 261 | if (!opp->available) |
| 262 | continue; |
| 263 | |
| 264 | if (opp->supplies[i].u_volt_min < uV[i].min) |
| 265 | uV[i].min = opp->supplies[i].u_volt_min; |
| 266 | if (opp->supplies[i].u_volt_max > uV[i].max) |
| 267 | uV[i].max = opp->supplies[i].u_volt_max; |
| 268 | } |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 269 | } |
| 270 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 271 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 272 | |
| 273 | /* |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 274 | * The caller needs to ensure that opp_table (and hence the regulator) |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 275 | * isn't freed, while we are executing this routine. |
| 276 | */ |
Andrzej Hajda | 8cc31116 | 2017-02-20 19:57:57 +0100 | [diff] [blame] | 277 | for (i = 0; i < count; i++) { |
Viresh Kumar | 478256b | 2017-05-23 09:32:11 +0530 | [diff] [blame] | 278 | reg = opp_table->regulators[i]; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 279 | ret = regulator_set_voltage_time(reg, uV[i].min, uV[i].max); |
| 280 | if (ret > 0) |
| 281 | latency_ns += ret * 1000; |
| 282 | } |
| 283 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 284 | kfree(uV); |
Viresh Kumar | cdd3e61 | 2017-01-23 10:11:51 +0530 | [diff] [blame] | 285 | put_opp_table: |
| 286 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 287 | |
| 288 | return latency_ns; |
| 289 | } |
| 290 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_volt_latency); |
| 291 | |
| 292 | /** |
Viresh Kumar | 2174344 | 2016-02-09 10:30:36 +0530 | [diff] [blame] | 293 | * dev_pm_opp_get_max_transition_latency() - Get max transition latency in |
| 294 | * nanoseconds |
| 295 | * @dev: device for which we do this operation |
| 296 | * |
| 297 | * Return: This function returns the max transition latency, in nanoseconds, to |
| 298 | * switch from one OPP to other. |
Viresh Kumar | 2174344 | 2016-02-09 10:30:36 +0530 | [diff] [blame] | 299 | */ |
| 300 | unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev) |
| 301 | { |
| 302 | return dev_pm_opp_get_max_volt_latency(dev) + |
| 303 | dev_pm_opp_get_max_clock_latency(dev); |
| 304 | } |
| 305 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_transition_latency); |
| 306 | |
| 307 | /** |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 308 | * 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] | 309 | * @dev: device for which we do this operation |
| 310 | * |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 311 | * Return: This function returns the frequency of the OPP marked as suspend_opp |
| 312 | * if one is available, else returns 0; |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 313 | */ |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 314 | unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev) |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 315 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 316 | struct opp_table *opp_table; |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 317 | unsigned long freq = 0; |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 318 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 319 | opp_table = _find_opp_table(dev); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 320 | if (IS_ERR(opp_table)) |
| 321 | return 0; |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 322 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 323 | if (opp_table->suspend_opp && opp_table->suspend_opp->available) |
| 324 | freq = dev_pm_opp_get_freq(opp_table->suspend_opp); |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 325 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 326 | dev_pm_opp_put_opp_table(opp_table); |
| 327 | |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 328 | return freq; |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 329 | } |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 330 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp_freq); |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 331 | |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 332 | int _get_opp_count(struct opp_table *opp_table) |
| 333 | { |
| 334 | struct dev_pm_opp *opp; |
| 335 | int count = 0; |
| 336 | |
| 337 | mutex_lock(&opp_table->lock); |
| 338 | |
| 339 | list_for_each_entry(opp, &opp_table->opp_list, node) { |
| 340 | if (opp->available) |
| 341 | count++; |
| 342 | } |
| 343 | |
| 344 | mutex_unlock(&opp_table->lock); |
| 345 | |
| 346 | return count; |
| 347 | } |
| 348 | |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 349 | /** |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 350 | * 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] | 351 | * @dev: device for which we do this operation |
| 352 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 353 | * 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] | 354 | * else returns 0 if none or the corresponding error value. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 355 | */ |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 356 | int dev_pm_opp_get_opp_count(struct device *dev) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 357 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 358 | struct opp_table *opp_table; |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 359 | int count; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 360 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 361 | opp_table = _find_opp_table(dev); |
| 362 | if (IS_ERR(opp_table)) { |
| 363 | count = PTR_ERR(opp_table); |
Fabio Estevam | 035ed07 | 2017-09-29 14:39:49 -0300 | [diff] [blame] | 364 | dev_dbg(dev, "%s: OPP table not found (%d)\n", |
Dmitry Torokhov | b4718c0 | 2014-12-16 15:09:38 -0800 | [diff] [blame] | 365 | __func__, count); |
Viresh Kumar | 09f662f | 2018-10-03 15:22:03 +0530 | [diff] [blame] | 366 | return count; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 367 | } |
| 368 | |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 369 | count = _get_opp_count(opp_table); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 370 | dev_pm_opp_put_opp_table(opp_table); |
| 371 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 372 | return count; |
| 373 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 374 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_count); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 375 | |
| 376 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 377 | * dev_pm_opp_find_freq_exact() - search for an exact frequency |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 378 | * @dev: device for which we do this operation |
| 379 | * @freq: frequency to search for |
Nishanth Menon | 7ae4961 | 2011-02-25 23:46:18 +0100 | [diff] [blame] | 380 | * @available: true/false - match for available opp |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 381 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 382 | * 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] | 383 | * matching opp if found, else returns ERR_PTR in case of error and should |
| 384 | * be handled using IS_ERR. Error return values can be: |
Nishanth Menon | 0779726 | 2012-10-24 22:00:12 +0200 | [diff] [blame] | 385 | * EINVAL: for bad pointer |
| 386 | * ERANGE: no match found for search |
| 387 | * ENODEV: if device not found in list of registered devices |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 388 | * |
| 389 | * Note: available is a modifier for the search. if available=true, then the |
| 390 | * match is for exact matching frequency and is available in the stored OPP |
| 391 | * table. if false, the match is for exact frequency which is not available. |
| 392 | * |
| 393 | * This provides a mechanism to enable an opp which is not available currently |
| 394 | * or the opposite as well. |
| 395 | * |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 396 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 397 | * use. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 398 | */ |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 399 | struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev, |
| 400 | unsigned long freq, |
| 401 | bool available) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 402 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 403 | struct opp_table *opp_table; |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 404 | struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 405 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 406 | opp_table = _find_opp_table(dev); |
| 407 | if (IS_ERR(opp_table)) { |
| 408 | int r = PTR_ERR(opp_table); |
| 409 | |
| 410 | dev_err(dev, "%s: OPP table not found (%d)\n", __func__, r); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 411 | return ERR_PTR(r); |
| 412 | } |
| 413 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 414 | mutex_lock(&opp_table->lock); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 415 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 416 | list_for_each_entry(temp_opp, &opp_table->opp_list, node) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 417 | if (temp_opp->available == available && |
| 418 | temp_opp->rate == freq) { |
| 419 | opp = temp_opp; |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 420 | |
| 421 | /* Increment the reference count of OPP */ |
| 422 | dev_pm_opp_get(opp); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 423 | break; |
| 424 | } |
| 425 | } |
| 426 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 427 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 428 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 429 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 430 | return opp; |
| 431 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 432 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 433 | |
Niklas Cassel | 71419d8 | 2019-07-25 12:41:29 +0200 | [diff] [blame] | 434 | /** |
| 435 | * dev_pm_opp_find_level_exact() - search for an exact level |
| 436 | * @dev: device for which we do this operation |
| 437 | * @level: level to search for |
| 438 | * |
| 439 | * Return: Searches for exact match in the opp table and returns pointer to the |
| 440 | * matching opp if found, else returns ERR_PTR in case of error and should |
| 441 | * be handled using IS_ERR. Error return values can be: |
| 442 | * EINVAL: for bad pointer |
| 443 | * ERANGE: no match found for search |
| 444 | * ENODEV: if device not found in list of registered devices |
| 445 | * |
| 446 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 447 | * use. |
| 448 | */ |
| 449 | struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev, |
| 450 | unsigned int level) |
| 451 | { |
| 452 | struct opp_table *opp_table; |
| 453 | struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); |
| 454 | |
| 455 | opp_table = _find_opp_table(dev); |
| 456 | if (IS_ERR(opp_table)) { |
| 457 | int r = PTR_ERR(opp_table); |
| 458 | |
| 459 | dev_err(dev, "%s: OPP table not found (%d)\n", __func__, r); |
| 460 | return ERR_PTR(r); |
| 461 | } |
| 462 | |
| 463 | mutex_lock(&opp_table->lock); |
| 464 | |
| 465 | list_for_each_entry(temp_opp, &opp_table->opp_list, node) { |
| 466 | if (temp_opp->level == level) { |
| 467 | opp = temp_opp; |
| 468 | |
| 469 | /* Increment the reference count of OPP */ |
| 470 | dev_pm_opp_get(opp); |
| 471 | break; |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | mutex_unlock(&opp_table->lock); |
| 476 | dev_pm_opp_put_opp_table(opp_table); |
| 477 | |
| 478 | return opp; |
| 479 | } |
| 480 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_exact); |
| 481 | |
Dmitry Osipenko | 8dd5cad | 2021-01-18 03:55:18 +0300 | [diff] [blame] | 482 | /** |
| 483 | * dev_pm_opp_find_level_ceil() - search for an rounded up level |
| 484 | * @dev: device for which we do this operation |
| 485 | * @level: level to search for |
| 486 | * |
| 487 | * Return: Searches for rounded up match in the opp table and returns pointer |
| 488 | * to the matching opp if found, else returns ERR_PTR in case of error and |
| 489 | * should be handled using IS_ERR. Error return values can be: |
| 490 | * EINVAL: for bad pointer |
| 491 | * ERANGE: no match found for search |
| 492 | * ENODEV: if device not found in list of registered devices |
| 493 | * |
| 494 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 495 | * use. |
| 496 | */ |
| 497 | struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev, |
| 498 | unsigned int *level) |
| 499 | { |
| 500 | struct opp_table *opp_table; |
| 501 | struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); |
| 502 | |
| 503 | opp_table = _find_opp_table(dev); |
| 504 | if (IS_ERR(opp_table)) { |
| 505 | int r = PTR_ERR(opp_table); |
| 506 | |
| 507 | dev_err(dev, "%s: OPP table not found (%d)\n", __func__, r); |
| 508 | return ERR_PTR(r); |
| 509 | } |
| 510 | |
| 511 | mutex_lock(&opp_table->lock); |
| 512 | |
| 513 | list_for_each_entry(temp_opp, &opp_table->opp_list, node) { |
| 514 | if (temp_opp->available && temp_opp->level >= *level) { |
| 515 | opp = temp_opp; |
| 516 | *level = opp->level; |
| 517 | |
| 518 | /* Increment the reference count of OPP */ |
| 519 | dev_pm_opp_get(opp); |
| 520 | break; |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | mutex_unlock(&opp_table->lock); |
| 525 | dev_pm_opp_put_opp_table(opp_table); |
| 526 | |
| 527 | return opp; |
| 528 | } |
| 529 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_ceil); |
| 530 | |
Jisheng Zhang | 067b7ce | 2016-07-25 14:11:16 +0800 | [diff] [blame] | 531 | static noinline struct dev_pm_opp *_find_freq_ceil(struct opp_table *opp_table, |
| 532 | unsigned long *freq) |
| 533 | { |
| 534 | struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); |
| 535 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 536 | mutex_lock(&opp_table->lock); |
| 537 | |
| 538 | list_for_each_entry(temp_opp, &opp_table->opp_list, node) { |
Jisheng Zhang | 067b7ce | 2016-07-25 14:11:16 +0800 | [diff] [blame] | 539 | if (temp_opp->available && temp_opp->rate >= *freq) { |
| 540 | opp = temp_opp; |
| 541 | *freq = opp->rate; |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 542 | |
| 543 | /* Increment the reference count of OPP */ |
| 544 | dev_pm_opp_get(opp); |
Jisheng Zhang | 067b7ce | 2016-07-25 14:11:16 +0800 | [diff] [blame] | 545 | break; |
| 546 | } |
| 547 | } |
| 548 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 549 | mutex_unlock(&opp_table->lock); |
| 550 | |
Jisheng Zhang | 067b7ce | 2016-07-25 14:11:16 +0800 | [diff] [blame] | 551 | return opp; |
| 552 | } |
| 553 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 554 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 555 | * dev_pm_opp_find_freq_ceil() - Search for an rounded ceil freq |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 556 | * @dev: device for which we do this operation |
| 557 | * @freq: Start frequency |
| 558 | * |
| 559 | * Search for the matching ceil *available* OPP from a starting freq |
| 560 | * for a device. |
| 561 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 562 | * Return: matching *opp and refreshes *freq accordingly, else returns |
Nishanth Menon | 0779726 | 2012-10-24 22:00:12 +0200 | [diff] [blame] | 563 | * ERR_PTR in case of error and should be handled using IS_ERR. Error return |
| 564 | * values can be: |
| 565 | * EINVAL: for bad pointer |
| 566 | * ERANGE: no match found for search |
| 567 | * ENODEV: if device not found in list of registered devices |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 568 | * |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 569 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 570 | * use. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 571 | */ |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 572 | struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev, |
| 573 | unsigned long *freq) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 574 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 575 | struct opp_table *opp_table; |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 576 | struct dev_pm_opp *opp; |
Dmitry Torokhov | b02ded2 | 2014-12-16 15:09:36 -0800 | [diff] [blame] | 577 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 578 | if (!dev || !freq) { |
| 579 | dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq); |
| 580 | return ERR_PTR(-EINVAL); |
| 581 | } |
| 582 | |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 583 | opp_table = _find_opp_table(dev); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 584 | if (IS_ERR(opp_table)) |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 585 | return ERR_CAST(opp_table); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 586 | |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 587 | opp = _find_freq_ceil(opp_table, freq); |
| 588 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 589 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 590 | |
| 591 | return opp; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 592 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 593 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 594 | |
| 595 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 596 | * dev_pm_opp_find_freq_floor() - Search for a rounded floor freq |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 597 | * @dev: device for which we do this operation |
| 598 | * @freq: Start frequency |
| 599 | * |
| 600 | * Search for the matching floor *available* OPP from a starting freq |
| 601 | * for a device. |
| 602 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 603 | * Return: matching *opp and refreshes *freq accordingly, else returns |
Nishanth Menon | 0779726 | 2012-10-24 22:00:12 +0200 | [diff] [blame] | 604 | * ERR_PTR in case of error and should be handled using IS_ERR. Error return |
| 605 | * values can be: |
| 606 | * EINVAL: for bad pointer |
| 607 | * ERANGE: no match found for search |
| 608 | * ENODEV: if device not found in list of registered devices |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 609 | * |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 610 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 611 | * use. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 612 | */ |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 613 | struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev, |
| 614 | unsigned long *freq) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 615 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 616 | struct opp_table *opp_table; |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 617 | struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 618 | |
| 619 | if (!dev || !freq) { |
| 620 | dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq); |
| 621 | return ERR_PTR(-EINVAL); |
| 622 | } |
| 623 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 624 | opp_table = _find_opp_table(dev); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 625 | if (IS_ERR(opp_table)) |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 626 | return ERR_CAST(opp_table); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 627 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 628 | mutex_lock(&opp_table->lock); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 629 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 630 | list_for_each_entry(temp_opp, &opp_table->opp_list, node) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 631 | if (temp_opp->available) { |
| 632 | /* go to the next node, before choosing prev */ |
| 633 | if (temp_opp->rate > *freq) |
| 634 | break; |
| 635 | else |
| 636 | opp = temp_opp; |
| 637 | } |
| 638 | } |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 639 | |
| 640 | /* Increment the reference count of OPP */ |
| 641 | if (!IS_ERR(opp)) |
| 642 | dev_pm_opp_get(opp); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 643 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 644 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 645 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 646 | if (!IS_ERR(opp)) |
| 647 | *freq = opp->rate; |
| 648 | |
| 649 | return opp; |
| 650 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 651 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 652 | |
Andrew-sh.Cheng | 2f36bde | 2019-03-29 14:46:10 +0800 | [diff] [blame] | 653 | /** |
| 654 | * dev_pm_opp_find_freq_ceil_by_volt() - Find OPP with highest frequency for |
| 655 | * target voltage. |
| 656 | * @dev: Device for which we do this operation. |
| 657 | * @u_volt: Target voltage. |
| 658 | * |
| 659 | * Search for OPP with highest (ceil) frequency and has voltage <= u_volt. |
| 660 | * |
| 661 | * Return: matching *opp, else returns ERR_PTR in case of error which should be |
| 662 | * handled using IS_ERR. |
| 663 | * |
| 664 | * Error return values can be: |
| 665 | * EINVAL: bad parameters |
| 666 | * |
| 667 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 668 | * use. |
| 669 | */ |
| 670 | struct dev_pm_opp *dev_pm_opp_find_freq_ceil_by_volt(struct device *dev, |
| 671 | unsigned long u_volt) |
| 672 | { |
| 673 | struct opp_table *opp_table; |
| 674 | struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); |
| 675 | |
| 676 | if (!dev || !u_volt) { |
| 677 | dev_err(dev, "%s: Invalid argument volt=%lu\n", __func__, |
| 678 | u_volt); |
| 679 | return ERR_PTR(-EINVAL); |
| 680 | } |
| 681 | |
| 682 | opp_table = _find_opp_table(dev); |
| 683 | if (IS_ERR(opp_table)) |
| 684 | return ERR_CAST(opp_table); |
| 685 | |
| 686 | mutex_lock(&opp_table->lock); |
| 687 | |
| 688 | list_for_each_entry(temp_opp, &opp_table->opp_list, node) { |
| 689 | if (temp_opp->available) { |
| 690 | if (temp_opp->supplies[0].u_volt > u_volt) |
| 691 | break; |
| 692 | opp = temp_opp; |
| 693 | } |
| 694 | } |
| 695 | |
| 696 | /* Increment the reference count of OPP */ |
| 697 | if (!IS_ERR(opp)) |
| 698 | dev_pm_opp_get(opp); |
| 699 | |
| 700 | mutex_unlock(&opp_table->lock); |
| 701 | dev_pm_opp_put_opp_table(opp_table); |
| 702 | |
| 703 | return opp; |
| 704 | } |
| 705 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil_by_volt); |
| 706 | |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 707 | static int _set_opp_voltage(struct device *dev, struct regulator *reg, |
Viresh Kumar | ce31781 | 2016-12-01 16:28:18 +0530 | [diff] [blame] | 708 | struct dev_pm_opp_supply *supply) |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 709 | { |
| 710 | int ret; |
| 711 | |
| 712 | /* Regulator not available for device */ |
| 713 | if (IS_ERR(reg)) { |
| 714 | dev_dbg(dev, "%s: regulator not available: %ld\n", __func__, |
| 715 | PTR_ERR(reg)); |
| 716 | return 0; |
| 717 | } |
| 718 | |
Viresh Kumar | ce31781 | 2016-12-01 16:28:18 +0530 | [diff] [blame] | 719 | dev_dbg(dev, "%s: voltages (mV): %lu %lu %lu\n", __func__, |
| 720 | supply->u_volt_min, supply->u_volt, supply->u_volt_max); |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 721 | |
Viresh Kumar | ce31781 | 2016-12-01 16:28:18 +0530 | [diff] [blame] | 722 | ret = regulator_set_voltage_triplet(reg, supply->u_volt_min, |
| 723 | supply->u_volt, supply->u_volt_max); |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 724 | if (ret) |
| 725 | 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] | 726 | __func__, supply->u_volt_min, supply->u_volt, |
| 727 | supply->u_volt_max, ret); |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 728 | |
| 729 | return ret; |
| 730 | } |
| 731 | |
Viresh Kumar | 285881b | 2019-01-31 13:53:25 +0530 | [diff] [blame] | 732 | static inline int _generic_set_opp_clk_only(struct device *dev, struct clk *clk, |
| 733 | unsigned long freq) |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 734 | { |
| 735 | int ret; |
| 736 | |
Viresh Kumar | 35e74b2 | 2021-01-21 12:38:13 +0530 | [diff] [blame] | 737 | /* We may reach here for devices which don't change frequency */ |
| 738 | if (IS_ERR(clk)) |
| 739 | return 0; |
| 740 | |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 741 | ret = clk_set_rate(clk, freq); |
| 742 | if (ret) { |
| 743 | dev_err(dev, "%s: failed to set clock rate: %d\n", __func__, |
| 744 | ret); |
| 745 | } |
| 746 | |
| 747 | return ret; |
| 748 | } |
| 749 | |
Kamil Konieczny | 8d45719 | 2019-07-19 17:05:32 +0200 | [diff] [blame] | 750 | static int _generic_set_opp_regulator(struct opp_table *opp_table, |
Viresh Kumar | c74b32f | 2017-05-23 09:32:10 +0530 | [diff] [blame] | 751 | struct device *dev, |
Viresh Kumar | 3f62670 | 2021-01-21 12:38:13 +0530 | [diff] [blame] | 752 | struct dev_pm_opp *opp, |
Viresh Kumar | c74b32f | 2017-05-23 09:32:10 +0530 | [diff] [blame] | 753 | unsigned long freq, |
Viresh Kumar | 3f62670 | 2021-01-21 12:38:13 +0530 | [diff] [blame] | 754 | int scaling_down) |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 755 | { |
Viresh Kumar | c74b32f | 2017-05-23 09:32:10 +0530 | [diff] [blame] | 756 | struct regulator *reg = opp_table->regulators[0]; |
Viresh Kumar | 3f62670 | 2021-01-21 12:38:13 +0530 | [diff] [blame] | 757 | struct dev_pm_opp *old_opp = opp_table->current_opp; |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 758 | int ret; |
| 759 | |
| 760 | /* This function only supports single regulator per device */ |
Viresh Kumar | c74b32f | 2017-05-23 09:32:10 +0530 | [diff] [blame] | 761 | if (WARN_ON(opp_table->regulator_count > 1)) { |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 762 | dev_err(dev, "multiple regulators are not supported\n"); |
| 763 | return -EINVAL; |
| 764 | } |
| 765 | |
| 766 | /* Scaling up? Scale voltage before frequency */ |
Viresh Kumar | 3f62670 | 2021-01-21 12:38:13 +0530 | [diff] [blame] | 767 | if (!scaling_down) { |
| 768 | ret = _set_opp_voltage(dev, reg, opp->supplies); |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 769 | if (ret) |
| 770 | goto restore_voltage; |
| 771 | } |
| 772 | |
| 773 | /* Change frequency */ |
Viresh Kumar | 285881b | 2019-01-31 13:53:25 +0530 | [diff] [blame] | 774 | ret = _generic_set_opp_clk_only(dev, opp_table->clk, freq); |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 775 | if (ret) |
| 776 | goto restore_voltage; |
| 777 | |
| 778 | /* Scaling down? Scale voltage after frequency */ |
Viresh Kumar | 3f62670 | 2021-01-21 12:38:13 +0530 | [diff] [blame] | 779 | if (scaling_down) { |
| 780 | ret = _set_opp_voltage(dev, reg, opp->supplies); |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 781 | if (ret) |
| 782 | goto restore_freq; |
| 783 | } |
| 784 | |
Kamil Konieczny | 8d45719 | 2019-07-19 17:05:32 +0200 | [diff] [blame] | 785 | /* |
| 786 | * Enable the regulator after setting its voltages, otherwise it breaks |
| 787 | * some boot-enabled regulators. |
| 788 | */ |
Viresh Kumar | 72f80ce | 2020-08-13 08:38:37 +0530 | [diff] [blame] | 789 | if (unlikely(!opp_table->enabled)) { |
Kamil Konieczny | 8d45719 | 2019-07-19 17:05:32 +0200 | [diff] [blame] | 790 | ret = regulator_enable(reg); |
| 791 | if (ret < 0) |
| 792 | dev_warn(dev, "Failed to enable regulator: %d", ret); |
Kamil Konieczny | 8d45719 | 2019-07-19 17:05:32 +0200 | [diff] [blame] | 793 | } |
| 794 | |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 795 | return 0; |
| 796 | |
| 797 | restore_freq: |
Viresh Kumar | 3f62670 | 2021-01-21 12:38:13 +0530 | [diff] [blame] | 798 | if (_generic_set_opp_clk_only(dev, opp_table->clk, old_opp->rate)) |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 799 | dev_err(dev, "%s: failed to restore old-freq (%lu Hz)\n", |
Viresh Kumar | 3f62670 | 2021-01-21 12:38:13 +0530 | [diff] [blame] | 800 | __func__, old_opp->rate); |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 801 | restore_voltage: |
| 802 | /* This shouldn't harm even if the voltages weren't updated earlier */ |
Viresh Kumar | 3f62670 | 2021-01-21 12:38:13 +0530 | [diff] [blame] | 803 | _set_opp_voltage(dev, reg, old_opp->supplies); |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 804 | |
| 805 | return ret; |
| 806 | } |
| 807 | |
Viresh Kumar | b00e667 | 2020-05-27 09:33:44 +0530 | [diff] [blame] | 808 | static int _set_opp_bw(const struct opp_table *opp_table, |
Viresh Kumar | 240ae50 | 2021-01-21 15:27:55 +0530 | [diff] [blame] | 809 | struct dev_pm_opp *opp, struct device *dev) |
Viresh Kumar | b00e667 | 2020-05-27 09:33:44 +0530 | [diff] [blame] | 810 | { |
| 811 | u32 avg, peak; |
| 812 | int i, ret; |
| 813 | |
| 814 | if (!opp_table->paths) |
| 815 | return 0; |
| 816 | |
| 817 | for (i = 0; i < opp_table->path_count; i++) { |
Viresh Kumar | 240ae50 | 2021-01-21 15:27:55 +0530 | [diff] [blame] | 818 | if (!opp) { |
Viresh Kumar | b00e667 | 2020-05-27 09:33:44 +0530 | [diff] [blame] | 819 | avg = 0; |
| 820 | peak = 0; |
| 821 | } else { |
| 822 | avg = opp->bandwidth[i].avg; |
| 823 | peak = opp->bandwidth[i].peak; |
| 824 | } |
| 825 | ret = icc_set_bw(opp_table->paths[i], avg, peak); |
| 826 | if (ret) { |
| 827 | dev_err(dev, "Failed to %s bandwidth[%d]: %d\n", |
Viresh Kumar | 240ae50 | 2021-01-21 15:27:55 +0530 | [diff] [blame] | 828 | opp ? "set" : "remove", i, ret); |
Viresh Kumar | b00e667 | 2020-05-27 09:33:44 +0530 | [diff] [blame] | 829 | return ret; |
| 830 | } |
| 831 | } |
| 832 | |
| 833 | return 0; |
| 834 | } |
| 835 | |
Viresh Kumar | 7e535993 | 2018-06-12 14:47:03 +0530 | [diff] [blame] | 836 | static int _set_opp_custom(const struct opp_table *opp_table, |
Viresh Kumar | 509e477 | 2021-01-21 13:06:01 +0530 | [diff] [blame] | 837 | struct device *dev, struct dev_pm_opp *opp, |
| 838 | unsigned long freq) |
Viresh Kumar | 7e535993 | 2018-06-12 14:47:03 +0530 | [diff] [blame] | 839 | { |
Dmitry Osipenko | 04b447d | 2021-01-21 01:26:49 +0300 | [diff] [blame] | 840 | struct dev_pm_set_opp_data *data = opp_table->set_opp_data; |
Viresh Kumar | 509e477 | 2021-01-21 13:06:01 +0530 | [diff] [blame] | 841 | struct dev_pm_opp *old_opp = opp_table->current_opp; |
Viresh Kumar | 7e535993 | 2018-06-12 14:47:03 +0530 | [diff] [blame] | 842 | int size; |
| 843 | |
Dmitry Osipenko | 04b447d | 2021-01-21 01:26:49 +0300 | [diff] [blame] | 844 | /* |
| 845 | * We support this only if dev_pm_opp_set_regulators() was called |
| 846 | * earlier. |
| 847 | */ |
| 848 | if (opp_table->sod_supplies) { |
Viresh Kumar | 509e477 | 2021-01-21 13:06:01 +0530 | [diff] [blame] | 849 | size = sizeof(*old_opp->supplies) * opp_table->regulator_count; |
| 850 | memcpy(data->old_opp.supplies, old_opp->supplies, size); |
| 851 | memcpy(data->new_opp.supplies, opp->supplies, size); |
Dmitry Osipenko | 04b447d | 2021-01-21 01:26:49 +0300 | [diff] [blame] | 852 | data->regulator_count = opp_table->regulator_count; |
| 853 | } else { |
| 854 | data->regulator_count = 0; |
| 855 | } |
| 856 | |
Viresh Kumar | 7e535993 | 2018-06-12 14:47:03 +0530 | [diff] [blame] | 857 | data->regulators = opp_table->regulators; |
Viresh Kumar | 7e535993 | 2018-06-12 14:47:03 +0530 | [diff] [blame] | 858 | data->clk = opp_table->clk; |
| 859 | data->dev = dev; |
Viresh Kumar | 509e477 | 2021-01-21 13:06:01 +0530 | [diff] [blame] | 860 | data->old_opp.rate = old_opp->rate; |
Viresh Kumar | 7e535993 | 2018-06-12 14:47:03 +0530 | [diff] [blame] | 861 | data->new_opp.rate = freq; |
Viresh Kumar | 7e535993 | 2018-06-12 14:47:03 +0530 | [diff] [blame] | 862 | |
| 863 | return opp_table->set_opp(data); |
| 864 | } |
| 865 | |
Stephan Gerhold | 60cdeae | 2020-07-30 10:01:44 +0200 | [diff] [blame] | 866 | static int _set_required_opp(struct device *dev, struct device *pd_dev, |
| 867 | struct dev_pm_opp *opp, int i) |
| 868 | { |
| 869 | unsigned int pstate = likely(opp) ? opp->required_opps[i]->pstate : 0; |
| 870 | int ret; |
| 871 | |
| 872 | if (!pd_dev) |
| 873 | return 0; |
| 874 | |
| 875 | ret = dev_pm_genpd_set_performance_state(pd_dev, pstate); |
| 876 | if (ret) { |
| 877 | dev_err(dev, "Failed to set performance rate of %s: %d (%d)\n", |
| 878 | dev_name(pd_dev), pstate, ret); |
| 879 | } |
| 880 | |
| 881 | return ret; |
| 882 | } |
| 883 | |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 884 | /* This is only called for PM domain for now */ |
| 885 | static int _set_required_opps(struct device *dev, |
| 886 | struct opp_table *opp_table, |
Stephan Gerhold | 2c59138 | 2020-07-30 10:01:45 +0200 | [diff] [blame] | 887 | struct dev_pm_opp *opp, bool up) |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 888 | { |
| 889 | struct opp_table **required_opp_tables = opp_table->required_opp_tables; |
| 890 | struct device **genpd_virt_devs = opp_table->genpd_virt_devs; |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 891 | int i, ret = 0; |
| 892 | |
| 893 | if (!required_opp_tables) |
| 894 | return 0; |
| 895 | |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 896 | /* required-opps not fully initialized yet */ |
| 897 | if (lazy_linking_pending(opp_table)) |
| 898 | return -EBUSY; |
| 899 | |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 900 | /* Single genpd case */ |
Stephan Gerhold | 60cdeae | 2020-07-30 10:01:44 +0200 | [diff] [blame] | 901 | if (!genpd_virt_devs) |
| 902 | return _set_required_opp(dev, dev, opp, 0); |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 903 | |
| 904 | /* Multiple genpd case */ |
| 905 | |
| 906 | /* |
| 907 | * Acquire genpd_virt_dev_lock to make sure we don't use a genpd_dev |
| 908 | * after it is freed from another thread. |
| 909 | */ |
| 910 | mutex_lock(&opp_table->genpd_virt_dev_lock); |
| 911 | |
Stephan Gerhold | 2c59138 | 2020-07-30 10:01:45 +0200 | [diff] [blame] | 912 | /* Scaling up? Set required OPPs in normal order, else reverse */ |
| 913 | if (up) { |
| 914 | for (i = 0; i < opp_table->required_opp_count; i++) { |
| 915 | ret = _set_required_opp(dev, genpd_virt_devs[i], opp, i); |
| 916 | if (ret) |
| 917 | break; |
| 918 | } |
| 919 | } else { |
| 920 | for (i = opp_table->required_opp_count - 1; i >= 0; i--) { |
| 921 | ret = _set_required_opp(dev, genpd_virt_devs[i], opp, i); |
| 922 | if (ret) |
| 923 | break; |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 924 | } |
| 925 | } |
Stephan Gerhold | 2c59138 | 2020-07-30 10:01:45 +0200 | [diff] [blame] | 926 | |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 927 | mutex_unlock(&opp_table->genpd_virt_dev_lock); |
| 928 | |
| 929 | return ret; |
| 930 | } |
| 931 | |
Viresh Kumar | 81c4d8a | 2021-01-20 16:16:48 +0530 | [diff] [blame] | 932 | static void _find_current_opp(struct device *dev, struct opp_table *opp_table) |
| 933 | { |
| 934 | struct dev_pm_opp *opp = ERR_PTR(-ENODEV); |
| 935 | unsigned long freq; |
| 936 | |
| 937 | if (!IS_ERR(opp_table->clk)) { |
| 938 | freq = clk_get_rate(opp_table->clk); |
| 939 | opp = _find_freq_ceil(opp_table, &freq); |
| 940 | } |
| 941 | |
| 942 | /* |
| 943 | * Unable to find the current OPP ? Pick the first from the list since |
| 944 | * it is in ascending order, otherwise rest of the code will need to |
| 945 | * make special checks to validate current_opp. |
| 946 | */ |
| 947 | if (IS_ERR(opp)) { |
| 948 | mutex_lock(&opp_table->lock); |
| 949 | opp = list_first_entry(&opp_table->opp_list, struct dev_pm_opp, node); |
| 950 | dev_pm_opp_get(opp); |
| 951 | mutex_unlock(&opp_table->lock); |
| 952 | } |
| 953 | |
| 954 | opp_table->current_opp = opp; |
| 955 | } |
| 956 | |
Viresh Kumar | 5ad58bb | 2021-01-21 12:08:45 +0530 | [diff] [blame] | 957 | 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] | 958 | { |
| 959 | int ret; |
| 960 | |
| 961 | if (!opp_table->enabled) |
| 962 | return 0; |
| 963 | |
| 964 | /* |
| 965 | * Some drivers need to support cases where some platforms may |
| 966 | * have OPP table for the device, while others don't and |
| 967 | * opp_set_rate() just needs to behave like clk_set_rate(). |
| 968 | */ |
| 969 | if (!_get_opp_count(opp_table)) |
| 970 | return 0; |
| 971 | |
Viresh Kumar | 240ae50 | 2021-01-21 15:27:55 +0530 | [diff] [blame] | 972 | ret = _set_opp_bw(opp_table, NULL, dev); |
Viresh Kumar | f3364e1 | 2020-08-13 09:48:04 +0530 | [diff] [blame] | 973 | if (ret) |
| 974 | return ret; |
| 975 | |
| 976 | if (opp_table->regulators) |
| 977 | regulator_disable(opp_table->regulators[0]); |
| 978 | |
Stephan Gerhold | 2c59138 | 2020-07-30 10:01:45 +0200 | [diff] [blame] | 979 | ret = _set_required_opps(dev, opp_table, NULL, false); |
Viresh Kumar | f3364e1 | 2020-08-13 09:48:04 +0530 | [diff] [blame] | 980 | |
| 981 | opp_table->enabled = false; |
| 982 | return ret; |
| 983 | } |
| 984 | |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 985 | static int _set_opp(struct device *dev, struct opp_table *opp_table, |
| 986 | struct dev_pm_opp *opp, unsigned long freq) |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 987 | { |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 988 | struct dev_pm_opp *old_opp; |
Viresh Kumar | f0b88fa4 | 2021-01-21 16:00:12 +0530 | [diff] [blame] | 989 | int scaling_down, ret; |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 990 | |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 991 | if (unlikely(!opp)) |
| 992 | return _disable_opp_table(dev, opp_table); |
Rajendra Nayak | aca48b6 | 2020-04-08 19:16:27 +0530 | [diff] [blame] | 993 | |
Viresh Kumar | 81c4d8a | 2021-01-20 16:16:48 +0530 | [diff] [blame] | 994 | /* Find the currently set OPP if we don't know already */ |
| 995 | if (unlikely(!opp_table->current_opp)) |
| 996 | _find_current_opp(dev, opp_table); |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 997 | |
Viresh Kumar | 81c4d8a | 2021-01-20 16:16:48 +0530 | [diff] [blame] | 998 | old_opp = opp_table->current_opp; |
Viresh Kumar | 81c4d8a | 2021-01-20 16:16:48 +0530 | [diff] [blame] | 999 | |
| 1000 | /* Return early if nothing to do */ |
Jonathan Marek | de04241 | 2021-02-16 15:10:29 -0500 | [diff] [blame] | 1001 | if (old_opp == opp && opp_table->current_rate == freq && |
| 1002 | opp_table->enabled) { |
Viresh Kumar | 81c4d8a | 2021-01-20 16:16:48 +0530 | [diff] [blame] | 1003 | dev_dbg(dev, "%s: OPPs are same, nothing to do\n", __func__); |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 1004 | return 0; |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 1005 | } |
| 1006 | |
Viresh Kumar | f0b88fa4 | 2021-01-21 16:00:12 +0530 | [diff] [blame] | 1007 | dev_dbg(dev, "%s: switching OPP: Freq %lu -> %lu Hz, Level %u -> %u, Bw %u -> %u\n", |
Jonathan Marek | de04241 | 2021-02-16 15:10:29 -0500 | [diff] [blame] | 1008 | __func__, opp_table->current_rate, freq, old_opp->level, |
| 1009 | opp->level, old_opp->bandwidth ? old_opp->bandwidth[0].peak : 0, |
Viresh Kumar | f0b88fa4 | 2021-01-21 16:00:12 +0530 | [diff] [blame] | 1010 | opp->bandwidth ? opp->bandwidth[0].peak : 0); |
| 1011 | |
| 1012 | scaling_down = _opp_compare_key(old_opp, opp); |
| 1013 | if (scaling_down == -1) |
| 1014 | scaling_down = 0; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1015 | |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 1016 | /* Scaling up? Configure required OPPs before frequency */ |
Viresh Kumar | f0b88fa4 | 2021-01-21 16:00:12 +0530 | [diff] [blame] | 1017 | if (!scaling_down) { |
Stephan Gerhold | 2c59138 | 2020-07-30 10:01:45 +0200 | [diff] [blame] | 1018 | ret = _set_required_opps(dev, opp_table, opp, true); |
Viresh Kumar | 870d5d9 | 2021-01-28 15:30:00 +0530 | [diff] [blame] | 1019 | if (ret) { |
| 1020 | dev_err(dev, "Failed to set required opps: %d\n", ret); |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 1021 | return ret; |
Viresh Kumar | 870d5d9 | 2021-01-28 15:30:00 +0530 | [diff] [blame] | 1022 | } |
| 1023 | |
| 1024 | ret = _set_opp_bw(opp_table, opp, dev); |
| 1025 | if (ret) { |
| 1026 | dev_err(dev, "Failed to set bw: %d\n", ret); |
| 1027 | return ret; |
| 1028 | } |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 1029 | } |
| 1030 | |
Viresh Kumar | 7e535993 | 2018-06-12 14:47:03 +0530 | [diff] [blame] | 1031 | if (opp_table->set_opp) { |
Viresh Kumar | 509e477 | 2021-01-21 13:06:01 +0530 | [diff] [blame] | 1032 | ret = _set_opp_custom(opp_table, dev, opp, freq); |
Viresh Kumar | 7e535993 | 2018-06-12 14:47:03 +0530 | [diff] [blame] | 1033 | } else if (opp_table->regulators) { |
Viresh Kumar | 3f62670 | 2021-01-21 12:38:13 +0530 | [diff] [blame] | 1034 | ret = _generic_set_opp_regulator(opp_table, dev, opp, freq, |
| 1035 | scaling_down); |
Viresh Kumar | c74b32f | 2017-05-23 09:32:10 +0530 | [diff] [blame] | 1036 | } else { |
Viresh Kumar | 7e535993 | 2018-06-12 14:47:03 +0530 | [diff] [blame] | 1037 | /* Only frequency scaling */ |
Viresh Kumar | 1d3c42c | 2021-01-20 15:57:21 +0530 | [diff] [blame] | 1038 | ret = _generic_set_opp_clk_only(dev, opp_table->clk, freq); |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1039 | } |
| 1040 | |
Viresh Kumar | 870d5d9 | 2021-01-28 15:30:00 +0530 | [diff] [blame] | 1041 | if (ret) |
| 1042 | return ret; |
| 1043 | |
Viresh Kumar | ca1b5d7 | 2018-06-14 10:03:26 +0530 | [diff] [blame] | 1044 | /* Scaling down? Configure required OPPs after frequency */ |
Viresh Kumar | 870d5d9 | 2021-01-28 15:30:00 +0530 | [diff] [blame] | 1045 | if (scaling_down) { |
Viresh Kumar | 240ae50 | 2021-01-21 15:27:55 +0530 | [diff] [blame] | 1046 | ret = _set_opp_bw(opp_table, opp, dev); |
Viresh Kumar | 870d5d9 | 2021-01-28 15:30:00 +0530 | [diff] [blame] | 1047 | if (ret) { |
| 1048 | dev_err(dev, "Failed to set bw: %d\n", ret); |
| 1049 | return ret; |
| 1050 | } |
Viresh Kumar | 81c4d8a | 2021-01-20 16:16:48 +0530 | [diff] [blame] | 1051 | |
Viresh Kumar | 870d5d9 | 2021-01-28 15:30:00 +0530 | [diff] [blame] | 1052 | ret = _set_required_opps(dev, opp_table, opp, false); |
| 1053 | if (ret) { |
| 1054 | dev_err(dev, "Failed to set required opps: %d\n", ret); |
| 1055 | return ret; |
Viresh Kumar | 81c4d8a | 2021-01-20 16:16:48 +0530 | [diff] [blame] | 1056 | } |
Viresh Kumar | 72f80ce | 2020-08-13 08:38:37 +0530 | [diff] [blame] | 1057 | } |
Georgi Djakov | fe2af40 | 2020-05-12 15:53:23 +0300 | [diff] [blame] | 1058 | |
Viresh Kumar | 870d5d9 | 2021-01-28 15:30:00 +0530 | [diff] [blame] | 1059 | opp_table->enabled = true; |
| 1060 | dev_pm_opp_put(old_opp); |
| 1061 | |
| 1062 | /* Make sure current_opp doesn't get freed */ |
| 1063 | dev_pm_opp_get(opp); |
| 1064 | opp_table->current_opp = opp; |
Jonathan Marek | de04241 | 2021-02-16 15:10:29 -0500 | [diff] [blame] | 1065 | opp_table->current_rate = freq; |
Viresh Kumar | 870d5d9 | 2021-01-28 15:30:00 +0530 | [diff] [blame] | 1066 | |
Viresh Kumar | 386ba85 | 2021-01-21 12:12:09 +0530 | [diff] [blame] | 1067 | return ret; |
| 1068 | } |
| 1069 | |
| 1070 | /** |
| 1071 | * dev_pm_opp_set_rate() - Configure new OPP based on frequency |
| 1072 | * @dev: device for which we do this operation |
| 1073 | * @target_freq: frequency to achieve |
| 1074 | * |
| 1075 | * This configures the power-supplies to the levels specified by the OPP |
| 1076 | * corresponding to the target_freq, and programs the clock to a value <= |
| 1077 | * target_freq, as rounded by clk_round_rate(). Device wanting to run at fmax |
| 1078 | * provided by the opp, should have already rounded to the target OPP's |
| 1079 | * frequency. |
| 1080 | */ |
| 1081 | int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) |
| 1082 | { |
| 1083 | struct opp_table *opp_table; |
| 1084 | unsigned long freq = 0, temp_freq; |
| 1085 | struct dev_pm_opp *opp = NULL; |
| 1086 | int ret; |
| 1087 | |
| 1088 | opp_table = _find_opp_table(dev); |
| 1089 | if (IS_ERR(opp_table)) { |
| 1090 | dev_err(dev, "%s: device's opp table doesn't exist\n", __func__); |
| 1091 | return PTR_ERR(opp_table); |
| 1092 | } |
| 1093 | |
| 1094 | if (target_freq) { |
| 1095 | /* |
| 1096 | * For IO devices which require an OPP on some platforms/SoCs |
| 1097 | * while just needing to scale the clock on some others |
| 1098 | * we look for empty OPP tables with just a clock handle and |
| 1099 | * scale only the clk. This makes dev_pm_opp_set_rate() |
| 1100 | * equivalent to a clk_set_rate() |
| 1101 | */ |
| 1102 | if (!_get_opp_count(opp_table)) { |
| 1103 | ret = _generic_set_opp_clk_only(dev, opp_table->clk, target_freq); |
| 1104 | goto put_opp_table; |
| 1105 | } |
| 1106 | |
| 1107 | freq = clk_round_rate(opp_table->clk, target_freq); |
| 1108 | if ((long)freq <= 0) |
| 1109 | freq = target_freq; |
| 1110 | |
| 1111 | /* |
| 1112 | * The clock driver may support finer resolution of the |
| 1113 | * frequencies than the OPP table, don't update the frequency we |
| 1114 | * pass to clk_set_rate() here. |
| 1115 | */ |
| 1116 | temp_freq = freq; |
| 1117 | opp = _find_freq_ceil(opp_table, &temp_freq); |
| 1118 | if (IS_ERR(opp)) { |
| 1119 | ret = PTR_ERR(opp); |
| 1120 | dev_err(dev, "%s: failed to find OPP for freq %lu (%d)\n", |
| 1121 | __func__, freq, ret); |
| 1122 | goto put_opp_table; |
| 1123 | } |
| 1124 | } |
| 1125 | |
| 1126 | ret = _set_opp(dev, opp_table, opp, freq); |
| 1127 | |
| 1128 | if (target_freq) |
| 1129 | dev_pm_opp_put(opp); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1130 | put_opp_table: |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1131 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1132 | return ret; |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 1133 | } |
| 1134 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_rate); |
| 1135 | |
Viresh Kumar | abbe348 | 2021-01-21 12:15:36 +0530 | [diff] [blame] | 1136 | /** |
| 1137 | * dev_pm_opp_set_opp() - Configure device for OPP |
| 1138 | * @dev: device for which we do this operation |
| 1139 | * @opp: OPP to set to |
| 1140 | * |
| 1141 | * This configures the device based on the properties of the OPP passed to this |
| 1142 | * routine. |
| 1143 | * |
| 1144 | * Return: 0 on success, a negative error number otherwise. |
| 1145 | */ |
| 1146 | int dev_pm_opp_set_opp(struct device *dev, struct dev_pm_opp *opp) |
| 1147 | { |
| 1148 | struct opp_table *opp_table; |
| 1149 | int ret; |
| 1150 | |
| 1151 | opp_table = _find_opp_table(dev); |
| 1152 | if (IS_ERR(opp_table)) { |
| 1153 | dev_err(dev, "%s: device opp doesn't exist\n", __func__); |
| 1154 | return PTR_ERR(opp_table); |
| 1155 | } |
| 1156 | |
| 1157 | ret = _set_opp(dev, opp_table, opp, opp ? opp->rate : 0); |
| 1158 | dev_pm_opp_put_opp_table(opp_table); |
| 1159 | |
| 1160 | return ret; |
| 1161 | } |
| 1162 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_opp); |
| 1163 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1164 | /* OPP-dev Helpers */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1165 | static void _remove_opp_dev(struct opp_device *opp_dev, |
| 1166 | struct opp_table *opp_table) |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1167 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1168 | opp_debug_unregister(opp_dev, opp_table); |
| 1169 | list_del(&opp_dev->node); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1170 | kfree(opp_dev); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1171 | } |
| 1172 | |
Viresh Kumar | ef43f01 | 2020-10-22 12:12:27 +0530 | [diff] [blame] | 1173 | struct opp_device *_add_opp_dev(const struct device *dev, |
| 1174 | struct opp_table *opp_table) |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1175 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1176 | struct opp_device *opp_dev; |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1177 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1178 | opp_dev = kzalloc(sizeof(*opp_dev), GFP_KERNEL); |
| 1179 | if (!opp_dev) |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1180 | return NULL; |
| 1181 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1182 | /* Initialize opp-dev */ |
| 1183 | opp_dev->dev = dev; |
Viresh Kumar | 3d25569 | 2018-08-03 07:05:21 +0530 | [diff] [blame] | 1184 | |
Viresh Kumar | ef43f01 | 2020-10-22 12:12:27 +0530 | [diff] [blame] | 1185 | mutex_lock(&opp_table->lock); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1186 | list_add(&opp_dev->node, &opp_table->dev_list); |
Viresh Kumar | ef43f01 | 2020-10-22 12:12:27 +0530 | [diff] [blame] | 1187 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1188 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1189 | /* Create debugfs entries for the opp_table */ |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 1190 | opp_debug_register(opp_dev, opp_table); |
Viresh Kumar | 283d55e | 2018-09-07 09:01:54 +0530 | [diff] [blame] | 1191 | |
| 1192 | return opp_dev; |
| 1193 | } |
| 1194 | |
Viresh Kumar | eb7c8743 | 2018-09-05 16:17:14 +0530 | [diff] [blame] | 1195 | static struct opp_table *_allocate_opp_table(struct device *dev, int index) |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 1196 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1197 | struct opp_table *opp_table; |
| 1198 | struct opp_device *opp_dev; |
Viresh Kumar | d54974c | 2016-02-09 10:30:38 +0530 | [diff] [blame] | 1199 | int ret; |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 1200 | |
| 1201 | /* |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1202 | * Allocate a new OPP table. In the infrequent case where a new |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 1203 | * device is needed to be added, we pay this penalty. |
| 1204 | */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1205 | opp_table = kzalloc(sizeof(*opp_table), GFP_KERNEL); |
| 1206 | if (!opp_table) |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1207 | return ERR_PTR(-ENOMEM); |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 1208 | |
Viresh Kumar | 3d25569 | 2018-08-03 07:05:21 +0530 | [diff] [blame] | 1209 | mutex_init(&opp_table->lock); |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 1210 | mutex_init(&opp_table->genpd_virt_dev_lock); |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1211 | INIT_LIST_HEAD(&opp_table->dev_list); |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 1212 | INIT_LIST_HEAD(&opp_table->lazy); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1213 | |
Viresh Kumar | 46f48ac | 2018-12-11 16:39:36 +0530 | [diff] [blame] | 1214 | /* Mark regulator count uninitialized */ |
| 1215 | opp_table->regulator_count = -1; |
| 1216 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1217 | opp_dev = _add_opp_dev(dev, opp_table); |
| 1218 | if (!opp_dev) { |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1219 | ret = -ENOMEM; |
| 1220 | goto err; |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1221 | } |
| 1222 | |
Viresh Kumar | eb7c8743 | 2018-09-05 16:17:14 +0530 | [diff] [blame] | 1223 | _of_init_opp_table(opp_table, dev, index); |
Viresh Kumar | 50f8cfb | 2016-02-09 10:30:37 +0530 | [diff] [blame] | 1224 | |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1225 | /* Find interconnect path(s) for the device */ |
| 1226 | ret = dev_pm_opp_of_find_icc_paths(dev, opp_table); |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1227 | if (ret) { |
| 1228 | if (ret == -EPROBE_DEFER) |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1229 | goto remove_opp_dev; |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1230 | |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1231 | dev_warn(dev, "%s: Error finding interconnect paths: %d\n", |
| 1232 | __func__, ret); |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1233 | } |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1234 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1235 | BLOCKING_INIT_NOTIFIER_HEAD(&opp_table->head); |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1236 | INIT_LIST_HEAD(&opp_table->opp_list); |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1237 | kref_init(&opp_table->kref); |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 1238 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1239 | return opp_table; |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1240 | |
Quanyang Wang | 976509b | 2020-12-24 18:49:27 +0800 | [diff] [blame] | 1241 | remove_opp_dev: |
| 1242 | _remove_opp_dev(opp_dev, opp_table); |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1243 | err: |
| 1244 | kfree(opp_table); |
| 1245 | return ERR_PTR(ret); |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 1246 | } |
| 1247 | |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1248 | void _get_opp_table_kref(struct opp_table *opp_table) |
Viresh Kumar | 3bac42c | 2015-07-29 16:22:59 +0530 | [diff] [blame] | 1249 | { |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1250 | kref_get(&opp_table->kref); |
| 1251 | } |
| 1252 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1253 | static struct opp_table *_update_opp_table_clk(struct device *dev, |
| 1254 | struct opp_table *opp_table, |
| 1255 | bool getclk) |
| 1256 | { |
Viresh Kumar | d4a4c7a | 2021-01-29 16:12:04 +0530 | [diff] [blame] | 1257 | int ret; |
| 1258 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1259 | /* |
| 1260 | * Return early if we don't need to get clk or we have already tried it |
| 1261 | * earlier. |
| 1262 | */ |
| 1263 | if (!getclk || IS_ERR(opp_table) || opp_table->clk) |
| 1264 | return opp_table; |
| 1265 | |
| 1266 | /* Find clk for the device */ |
| 1267 | opp_table->clk = clk_get(dev, NULL); |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1268 | |
Viresh Kumar | d4a4c7a | 2021-01-29 16:12:04 +0530 | [diff] [blame] | 1269 | ret = PTR_ERR_OR_ZERO(opp_table->clk); |
| 1270 | if (!ret) |
| 1271 | return opp_table; |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1272 | |
Viresh Kumar | d4a4c7a | 2021-01-29 16:12:04 +0530 | [diff] [blame] | 1273 | if (ret == -ENOENT) { |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1274 | dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__, ret); |
Viresh Kumar | d4a4c7a | 2021-01-29 16:12:04 +0530 | [diff] [blame] | 1275 | return opp_table; |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1276 | } |
| 1277 | |
Viresh Kumar | d4a4c7a | 2021-01-29 16:12:04 +0530 | [diff] [blame] | 1278 | dev_pm_opp_put_opp_table(opp_table); |
| 1279 | dev_err_probe(dev, ret, "Couldn't find clock\n"); |
| 1280 | |
| 1281 | return ERR_PTR(ret); |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1282 | } |
| 1283 | |
Viresh Kumar | 27c0948 | 2020-10-27 16:53:21 +0530 | [diff] [blame] | 1284 | /* |
| 1285 | * We need to make sure that the OPP table for a device doesn't get added twice, |
| 1286 | * if this routine gets called in parallel with the same device pointer. |
| 1287 | * |
| 1288 | * The simplest way to enforce that is to perform everything (find existing |
| 1289 | * table and if not found, create a new one) under the opp_table_lock, so only |
| 1290 | * one creator gets access to the same. But that expands the critical section |
| 1291 | * under the lock and may end up causing circular dependencies with frameworks |
| 1292 | * like debugfs, interconnect or clock framework as they may be direct or |
| 1293 | * indirect users of OPP core. |
| 1294 | * |
| 1295 | * And for that reason we have to go for a bit tricky implementation here, which |
| 1296 | * uses the opp_tables_busy flag to indicate if another creator is in the middle |
| 1297 | * of adding an OPP table and others should wait for it to finish. |
| 1298 | */ |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1299 | struct opp_table *_add_opp_table_indexed(struct device *dev, int index, |
| 1300 | bool getclk) |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1301 | { |
| 1302 | struct opp_table *opp_table; |
| 1303 | |
Viresh Kumar | 27c0948 | 2020-10-27 16:53:21 +0530 | [diff] [blame] | 1304 | again: |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1305 | mutex_lock(&opp_table_lock); |
| 1306 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1307 | opp_table = _find_opp_table_unlocked(dev); |
| 1308 | if (!IS_ERR(opp_table)) |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1309 | goto unlock; |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1310 | |
Viresh Kumar | 27c0948 | 2020-10-27 16:53:21 +0530 | [diff] [blame] | 1311 | /* |
| 1312 | * The opp_tables list or an OPP table's dev_list is getting updated by |
| 1313 | * another user, wait for it to finish. |
| 1314 | */ |
| 1315 | if (unlikely(opp_tables_busy)) { |
| 1316 | mutex_unlock(&opp_table_lock); |
| 1317 | cpu_relax(); |
| 1318 | goto again; |
| 1319 | } |
| 1320 | |
| 1321 | opp_tables_busy = true; |
Viresh Kumar | 283d55e | 2018-09-07 09:01:54 +0530 | [diff] [blame] | 1322 | opp_table = _managed_opp(dev, index); |
Viresh Kumar | 27c0948 | 2020-10-27 16:53:21 +0530 | [diff] [blame] | 1323 | |
| 1324 | /* Drop the lock to reduce the size of critical section */ |
| 1325 | mutex_unlock(&opp_table_lock); |
| 1326 | |
Viresh Kumar | 283d55e | 2018-09-07 09:01:54 +0530 | [diff] [blame] | 1327 | if (opp_table) { |
Viresh Kumar | ef43f01 | 2020-10-22 12:12:27 +0530 | [diff] [blame] | 1328 | if (!_add_opp_dev(dev, opp_table)) { |
Viresh Kumar | 283d55e | 2018-09-07 09:01:54 +0530 | [diff] [blame] | 1329 | dev_pm_opp_put_opp_table(opp_table); |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1330 | opp_table = ERR_PTR(-ENOMEM); |
Viresh Kumar | 283d55e | 2018-09-07 09:01:54 +0530 | [diff] [blame] | 1331 | } |
Viresh Kumar | 27c0948 | 2020-10-27 16:53:21 +0530 | [diff] [blame] | 1332 | |
| 1333 | mutex_lock(&opp_table_lock); |
| 1334 | } else { |
| 1335 | opp_table = _allocate_opp_table(dev, index); |
| 1336 | |
| 1337 | mutex_lock(&opp_table_lock); |
| 1338 | if (!IS_ERR(opp_table)) |
| 1339 | list_add(&opp_table->node, &opp_tables); |
Viresh Kumar | 283d55e | 2018-09-07 09:01:54 +0530 | [diff] [blame] | 1340 | } |
| 1341 | |
Viresh Kumar | 27c0948 | 2020-10-27 16:53:21 +0530 | [diff] [blame] | 1342 | opp_tables_busy = false; |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1343 | |
| 1344 | unlock: |
| 1345 | mutex_unlock(&opp_table_lock); |
| 1346 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1347 | return _update_opp_table_clk(dev, opp_table, getclk); |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1348 | } |
Viresh Kumar | eb7c8743 | 2018-09-05 16:17:14 +0530 | [diff] [blame] | 1349 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1350 | static struct opp_table *_add_opp_table(struct device *dev, bool getclk) |
Viresh Kumar | e77dcb0 | 2020-11-06 10:37:16 +0530 | [diff] [blame] | 1351 | { |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1352 | return _add_opp_table_indexed(dev, 0, getclk); |
Viresh Kumar | e77dcb0 | 2020-11-06 10:37:16 +0530 | [diff] [blame] | 1353 | } |
| 1354 | |
Viresh Kumar | eb7c8743 | 2018-09-05 16:17:14 +0530 | [diff] [blame] | 1355 | struct opp_table *dev_pm_opp_get_opp_table(struct device *dev) |
| 1356 | { |
Viresh Kumar | e77dcb0 | 2020-11-06 10:37:16 +0530 | [diff] [blame] | 1357 | return _find_opp_table(dev); |
Viresh Kumar | eb7c8743 | 2018-09-05 16:17:14 +0530 | [diff] [blame] | 1358 | } |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1359 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_table); |
| 1360 | |
Viresh Kumar | b83c189 | 2017-01-23 10:11:45 +0530 | [diff] [blame] | 1361 | static void _opp_table_kref_release(struct kref *kref) |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1362 | { |
| 1363 | struct opp_table *opp_table = container_of(kref, struct opp_table, kref); |
Viresh Kumar | cdd6ed9 | 2018-09-12 12:35:19 +0530 | [diff] [blame] | 1364 | struct opp_device *opp_dev, *temp; |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1365 | int i; |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1366 | |
Viresh Kumar | e0df59d | 2020-10-22 12:26:08 +0530 | [diff] [blame] | 1367 | /* Drop the lock as soon as we can */ |
| 1368 | list_del(&opp_table->node); |
| 1369 | mutex_unlock(&opp_table_lock); |
| 1370 | |
Viresh Kumar | 81c4d8a | 2021-01-20 16:16:48 +0530 | [diff] [blame] | 1371 | if (opp_table->current_opp) |
| 1372 | dev_pm_opp_put(opp_table->current_opp); |
| 1373 | |
Viresh Kumar | 5d6d106 | 2018-06-07 14:50:43 +0530 | [diff] [blame] | 1374 | _of_clear_opp_table(opp_table); |
| 1375 | |
Viresh Kumar | d54974c | 2016-02-09 10:30:38 +0530 | [diff] [blame] | 1376 | /* Release clk */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1377 | if (!IS_ERR(opp_table->clk)) |
| 1378 | clk_put(opp_table->clk); |
Viresh Kumar | d54974c | 2016-02-09 10:30:38 +0530 | [diff] [blame] | 1379 | |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1380 | if (opp_table->paths) { |
| 1381 | for (i = 0; i < opp_table->path_count; i++) |
| 1382 | icc_put(opp_table->paths[i]); |
| 1383 | kfree(opp_table->paths); |
| 1384 | } |
| 1385 | |
Viresh Kumar | cdd6ed9 | 2018-09-12 12:35:19 +0530 | [diff] [blame] | 1386 | WARN_ON(!list_empty(&opp_table->opp_list)); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1387 | |
Viresh Kumar | cdd6ed9 | 2018-09-12 12:35:19 +0530 | [diff] [blame] | 1388 | list_for_each_entry_safe(opp_dev, temp, &opp_table->dev_list, node) { |
| 1389 | /* |
| 1390 | * The OPP table is getting removed, drop the performance state |
| 1391 | * constraints. |
| 1392 | */ |
| 1393 | if (opp_table->genpd_performance_state) |
| 1394 | dev_pm_genpd_set_performance_state((struct device *)(opp_dev->dev), 0); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1395 | |
Viresh Kumar | cdd6ed9 | 2018-09-12 12:35:19 +0530 | [diff] [blame] | 1396 | _remove_opp_dev(opp_dev, opp_table); |
| 1397 | } |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 1398 | |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 1399 | mutex_destroy(&opp_table->genpd_virt_dev_lock); |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 1400 | mutex_destroy(&opp_table->lock); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1401 | kfree(opp_table); |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 1402 | } |
| 1403 | |
| 1404 | void dev_pm_opp_put_opp_table(struct opp_table *opp_table) |
| 1405 | { |
| 1406 | kref_put_mutex(&opp_table->kref, _opp_table_kref_release, |
| 1407 | &opp_table_lock); |
| 1408 | } |
| 1409 | EXPORT_SYMBOL_GPL(dev_pm_opp_put_opp_table); |
| 1410 | |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1411 | void _opp_free(struct dev_pm_opp *opp) |
Viresh Kumar | 969fceb | 2017-01-02 14:40:59 +0530 | [diff] [blame] | 1412 | { |
| 1413 | kfree(opp); |
Viresh Kumar | 969fceb | 2017-01-02 14:40:59 +0530 | [diff] [blame] | 1414 | } |
| 1415 | |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1416 | static void _opp_kref_release(struct kref *kref) |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1417 | { |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1418 | struct dev_pm_opp *opp = container_of(kref, struct dev_pm_opp, kref); |
| 1419 | struct opp_table *opp_table = opp->opp_table; |
| 1420 | |
| 1421 | list_del(&opp->node); |
| 1422 | mutex_unlock(&opp_table->lock); |
| 1423 | |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1424 | /* |
| 1425 | * Notify the changes in the availability of the operable |
| 1426 | * frequency/voltage list. |
| 1427 | */ |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1428 | blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_REMOVE, opp); |
Viresh Kumar | da544b6 | 2018-06-07 14:50:43 +0530 | [diff] [blame] | 1429 | _of_opp_free_required_opps(opp_table, opp); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 1430 | opp_debug_remove_one(opp); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1431 | kfree(opp); |
Viresh Kumar | 1690d8b | 2019-01-04 15:14:33 +0530 | [diff] [blame] | 1432 | } |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1433 | |
Viresh Kumar | a88bd2a | 2017-11-29 15:18:36 +0530 | [diff] [blame] | 1434 | void dev_pm_opp_get(struct dev_pm_opp *opp) |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 1435 | { |
| 1436 | kref_get(&opp->kref); |
| 1437 | } |
| 1438 | |
Viresh Kumar | 7034764 | 2017-01-23 10:11:46 +0530 | [diff] [blame] | 1439 | void dev_pm_opp_put(struct dev_pm_opp *opp) |
| 1440 | { |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1441 | kref_put_mutex(&opp->kref, _opp_kref_release, &opp->opp_table->lock); |
Viresh Kumar | 7034764 | 2017-01-23 10:11:46 +0530 | [diff] [blame] | 1442 | } |
| 1443 | EXPORT_SYMBOL_GPL(dev_pm_opp_put); |
| 1444 | |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1445 | /** |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1446 | * dev_pm_opp_remove() - Remove an OPP from OPP table |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1447 | * @dev: device for which we do this operation |
| 1448 | * @freq: OPP to remove with matching 'freq' |
| 1449 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1450 | * This function removes an opp from the opp table. |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1451 | */ |
| 1452 | void dev_pm_opp_remove(struct device *dev, unsigned long freq) |
| 1453 | { |
| 1454 | struct dev_pm_opp *opp; |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1455 | struct opp_table *opp_table; |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1456 | bool found = false; |
| 1457 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1458 | opp_table = _find_opp_table(dev); |
| 1459 | if (IS_ERR(opp_table)) |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1460 | return; |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1461 | |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 1462 | mutex_lock(&opp_table->lock); |
| 1463 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1464 | list_for_each_entry(opp, &opp_table->opp_list, node) { |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1465 | if (opp->rate == freq) { |
| 1466 | found = true; |
| 1467 | break; |
| 1468 | } |
| 1469 | } |
| 1470 | |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 1471 | mutex_unlock(&opp_table->lock); |
| 1472 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1473 | if (found) { |
| 1474 | dev_pm_opp_put(opp); |
Viresh Kumar | 0ad8c62 | 2018-08-02 14:23:09 +0530 | [diff] [blame] | 1475 | |
| 1476 | /* Drop the reference taken by dev_pm_opp_add() */ |
| 1477 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1478 | } else { |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1479 | dev_warn(dev, "%s: Couldn't find OPP with freq: %lu\n", |
| 1480 | __func__, freq); |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1481 | } |
| 1482 | |
Viresh Kumar | 0ad8c62 | 2018-08-02 14:23:09 +0530 | [diff] [blame] | 1483 | /* Drop the reference taken by _find_opp_table() */ |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1484 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1485 | } |
| 1486 | EXPORT_SYMBOL_GPL(dev_pm_opp_remove); |
| 1487 | |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1488 | static struct dev_pm_opp *_opp_get_next(struct opp_table *opp_table, |
| 1489 | bool dynamic) |
| 1490 | { |
| 1491 | struct dev_pm_opp *opp = NULL, *temp; |
| 1492 | |
| 1493 | mutex_lock(&opp_table->lock); |
| 1494 | list_for_each_entry(temp, &opp_table->opp_list, node) { |
| 1495 | if (dynamic == temp->dynamic) { |
| 1496 | opp = temp; |
| 1497 | break; |
| 1498 | } |
| 1499 | } |
| 1500 | |
| 1501 | mutex_unlock(&opp_table->lock); |
| 1502 | return opp; |
| 1503 | } |
| 1504 | |
Viresh Kumar | 922ff07 | 2020-08-31 13:03:06 +0530 | [diff] [blame] | 1505 | bool _opp_remove_all_static(struct opp_table *opp_table) |
Viresh Kumar | 03758d6 | 2019-11-11 16:35:03 +0530 | [diff] [blame] | 1506 | { |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1507 | struct dev_pm_opp *opp; |
Viresh Kumar | 03758d6 | 2019-11-11 16:35:03 +0530 | [diff] [blame] | 1508 | |
| 1509 | mutex_lock(&opp_table->lock); |
| 1510 | |
Viresh Kumar | 922ff07 | 2020-08-31 13:03:06 +0530 | [diff] [blame] | 1511 | if (!opp_table->parsed_static_opps) { |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1512 | mutex_unlock(&opp_table->lock); |
| 1513 | return false; |
Viresh Kumar | 922ff07 | 2020-08-31 13:03:06 +0530 | [diff] [blame] | 1514 | } |
| 1515 | |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1516 | if (--opp_table->parsed_static_opps) { |
| 1517 | mutex_unlock(&opp_table->lock); |
| 1518 | return true; |
Viresh Kumar | 03758d6 | 2019-11-11 16:35:03 +0530 | [diff] [blame] | 1519 | } |
| 1520 | |
Viresh Kumar | 03758d6 | 2019-11-11 16:35:03 +0530 | [diff] [blame] | 1521 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | 922ff07 | 2020-08-31 13:03:06 +0530 | [diff] [blame] | 1522 | |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1523 | /* |
| 1524 | * Can't remove the OPP from under the lock, debugfs removal needs to |
| 1525 | * happen lock less to avoid circular dependency issues. |
| 1526 | */ |
| 1527 | while ((opp = _opp_get_next(opp_table, false))) |
| 1528 | dev_pm_opp_put(opp); |
| 1529 | |
| 1530 | return true; |
Viresh Kumar | 03758d6 | 2019-11-11 16:35:03 +0530 | [diff] [blame] | 1531 | } |
| 1532 | |
Viresh Kumar | 1690d8b | 2019-01-04 15:14:33 +0530 | [diff] [blame] | 1533 | /** |
| 1534 | * dev_pm_opp_remove_all_dynamic() - Remove all dynamically created OPPs |
| 1535 | * @dev: device for which we do this operation |
| 1536 | * |
| 1537 | * This function removes all dynamically created OPPs from the opp table. |
| 1538 | */ |
| 1539 | void dev_pm_opp_remove_all_dynamic(struct device *dev) |
| 1540 | { |
| 1541 | struct opp_table *opp_table; |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1542 | struct dev_pm_opp *opp; |
Viresh Kumar | 1690d8b | 2019-01-04 15:14:33 +0530 | [diff] [blame] | 1543 | int count = 0; |
| 1544 | |
| 1545 | opp_table = _find_opp_table(dev); |
| 1546 | if (IS_ERR(opp_table)) |
| 1547 | return; |
| 1548 | |
Viresh Kumar | cf1fac9 | 2020-11-19 11:24:32 +0530 | [diff] [blame] | 1549 | /* |
| 1550 | * Can't remove the OPP from under the lock, debugfs removal needs to |
| 1551 | * happen lock less to avoid circular dependency issues. |
| 1552 | */ |
| 1553 | while ((opp = _opp_get_next(opp_table, true))) { |
| 1554 | dev_pm_opp_put(opp); |
| 1555 | count++; |
Viresh Kumar | 1690d8b | 2019-01-04 15:14:33 +0530 | [diff] [blame] | 1556 | } |
Viresh Kumar | 1690d8b | 2019-01-04 15:14:33 +0530 | [diff] [blame] | 1557 | |
| 1558 | /* Drop the references taken by dev_pm_opp_add() */ |
| 1559 | while (count--) |
| 1560 | dev_pm_opp_put_opp_table(opp_table); |
| 1561 | |
| 1562 | /* Drop the reference taken by _find_opp_table() */ |
| 1563 | dev_pm_opp_put_opp_table(opp_table); |
| 1564 | } |
| 1565 | EXPORT_SYMBOL_GPL(dev_pm_opp_remove_all_dynamic); |
| 1566 | |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1567 | struct dev_pm_opp *_opp_allocate(struct opp_table *table) |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1568 | { |
| 1569 | struct dev_pm_opp *opp; |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1570 | int supply_count, supply_size, icc_size; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1571 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1572 | /* Allocate space for at least one supply */ |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1573 | supply_count = table->regulator_count > 0 ? table->regulator_count : 1; |
| 1574 | supply_size = sizeof(*opp->supplies) * supply_count; |
| 1575 | icc_size = sizeof(*opp->bandwidth) * table->path_count; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1576 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1577 | /* allocate new OPP node and supplies structures */ |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1578 | opp = kzalloc(sizeof(*opp) + supply_size + icc_size, GFP_KERNEL); |
| 1579 | |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1580 | if (!opp) |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1581 | return NULL; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1582 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1583 | /* Put the supplies at the end of the OPP structure as an empty array */ |
| 1584 | opp->supplies = (struct dev_pm_opp_supply *)(opp + 1); |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1585 | if (icc_size) |
| 1586 | opp->bandwidth = (struct dev_pm_opp_icc_bw *)(opp->supplies + supply_count); |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1587 | INIT_LIST_HEAD(&opp->node); |
| 1588 | |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1589 | return opp; |
| 1590 | } |
| 1591 | |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 1592 | static bool _opp_supported_by_regulators(struct dev_pm_opp *opp, |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1593 | struct opp_table *opp_table) |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 1594 | { |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1595 | struct regulator *reg; |
| 1596 | int i; |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 1597 | |
Viresh Kumar | 90e3577 | 2018-12-11 16:32:47 +0530 | [diff] [blame] | 1598 | if (!opp_table->regulators) |
| 1599 | return true; |
| 1600 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1601 | for (i = 0; i < opp_table->regulator_count; i++) { |
| 1602 | reg = opp_table->regulators[i]; |
| 1603 | |
| 1604 | if (!regulator_is_supported_voltage(reg, |
| 1605 | opp->supplies[i].u_volt_min, |
| 1606 | opp->supplies[i].u_volt_max)) { |
| 1607 | pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n", |
| 1608 | __func__, opp->supplies[i].u_volt_min, |
| 1609 | opp->supplies[i].u_volt_max); |
| 1610 | return false; |
| 1611 | } |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 1612 | } |
| 1613 | |
| 1614 | return true; |
| 1615 | } |
| 1616 | |
Saravana Kannan | 6c591ee | 2020-05-12 15:53:19 +0300 | [diff] [blame] | 1617 | int _opp_compare_key(struct dev_pm_opp *opp1, struct dev_pm_opp *opp2) |
| 1618 | { |
| 1619 | if (opp1->rate != opp2->rate) |
| 1620 | return opp1->rate < opp2->rate ? -1 : 1; |
Georgi Djakov | 6d3f922 | 2020-05-12 15:53:21 +0300 | [diff] [blame] | 1621 | if (opp1->bandwidth && opp2->bandwidth && |
| 1622 | opp1->bandwidth[0].peak != opp2->bandwidth[0].peak) |
| 1623 | return opp1->bandwidth[0].peak < opp2->bandwidth[0].peak ? -1 : 1; |
Saravana Kannan | 6c591ee | 2020-05-12 15:53:19 +0300 | [diff] [blame] | 1624 | if (opp1->level != opp2->level) |
| 1625 | return opp1->level < opp2->level ? -1 : 1; |
| 1626 | return 0; |
| 1627 | } |
| 1628 | |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 1629 | static int _opp_is_duplicate(struct device *dev, struct dev_pm_opp *new_opp, |
| 1630 | struct opp_table *opp_table, |
| 1631 | struct list_head **head) |
| 1632 | { |
| 1633 | struct dev_pm_opp *opp; |
Saravana Kannan | 6c591ee | 2020-05-12 15:53:19 +0300 | [diff] [blame] | 1634 | int opp_cmp; |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 1635 | |
| 1636 | /* |
| 1637 | * Insert new OPP in order of increasing frequency and discard if |
| 1638 | * already present. |
| 1639 | * |
| 1640 | * Need to use &opp_table->opp_list in the condition part of the 'for' |
| 1641 | * loop, don't replace it with head otherwise it will become an infinite |
| 1642 | * loop. |
| 1643 | */ |
| 1644 | list_for_each_entry(opp, &opp_table->opp_list, node) { |
Saravana Kannan | 6c591ee | 2020-05-12 15:53:19 +0300 | [diff] [blame] | 1645 | opp_cmp = _opp_compare_key(new_opp, opp); |
| 1646 | if (opp_cmp > 0) { |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 1647 | *head = &opp->node; |
| 1648 | continue; |
| 1649 | } |
| 1650 | |
Saravana Kannan | 6c591ee | 2020-05-12 15:53:19 +0300 | [diff] [blame] | 1651 | if (opp_cmp < 0) |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 1652 | return 0; |
| 1653 | |
| 1654 | /* Duplicate OPPs */ |
| 1655 | dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n", |
| 1656 | __func__, opp->rate, opp->supplies[0].u_volt, |
| 1657 | opp->available, new_opp->rate, |
| 1658 | new_opp->supplies[0].u_volt, new_opp->available); |
| 1659 | |
| 1660 | /* Should we compare voltages for all regulators here ? */ |
| 1661 | return opp->available && |
| 1662 | new_opp->supplies[0].u_volt == opp->supplies[0].u_volt ? -EBUSY : -EEXIST; |
| 1663 | } |
| 1664 | |
| 1665 | return 0; |
| 1666 | } |
| 1667 | |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 1668 | void _required_opps_available(struct dev_pm_opp *opp, int count) |
| 1669 | { |
| 1670 | int i; |
| 1671 | |
| 1672 | for (i = 0; i < count; i++) { |
| 1673 | if (opp->required_opps[i]->available) |
| 1674 | continue; |
| 1675 | |
| 1676 | opp->available = false; |
| 1677 | pr_warn("%s: OPP not supported by required OPP %pOF (%lu)\n", |
| 1678 | __func__, opp->required_opps[i]->np, opp->rate); |
| 1679 | return; |
| 1680 | } |
| 1681 | } |
| 1682 | |
Viresh Kumar | 7f8538e | 2017-01-02 14:40:55 +0530 | [diff] [blame] | 1683 | /* |
| 1684 | * Returns: |
| 1685 | * 0: On success. And appropriate error message for duplicate OPPs. |
| 1686 | * -EBUSY: For OPP with same freq/volt and is available. The callers of |
| 1687 | * _opp_add() must return 0 if they receive -EBUSY from it. This is to make |
| 1688 | * sure we don't print error messages unnecessarily if different parts of |
| 1689 | * kernel try to initialize the OPP table. |
| 1690 | * -EEXIST: For OPP with same freq but different volt or is unavailable. This |
| 1691 | * should be considered an error by the callers of _opp_add(). |
| 1692 | */ |
Viresh Kumar | f47b72a | 2016-05-05 16:20:33 +0530 | [diff] [blame] | 1693 | int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 1694 | struct opp_table *opp_table, bool rate_not_available) |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1695 | { |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 1696 | struct list_head *head; |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 1697 | int ret; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1698 | |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 1699 | mutex_lock(&opp_table->lock); |
| 1700 | head = &opp_table->opp_list; |
| 1701 | |
Dmitry Osipenko | 32715be | 2021-01-18 03:55:13 +0300 | [diff] [blame] | 1702 | ret = _opp_is_duplicate(dev, new_opp, opp_table, &head); |
| 1703 | if (ret) { |
| 1704 | mutex_unlock(&opp_table->lock); |
| 1705 | return ret; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1706 | } |
| 1707 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1708 | list_add(&new_opp->node, head); |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 1709 | mutex_unlock(&opp_table->lock); |
| 1710 | |
| 1711 | new_opp->opp_table = opp_table; |
Viresh Kumar | 7034764 | 2017-01-23 10:11:46 +0530 | [diff] [blame] | 1712 | kref_init(&new_opp->kref); |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1713 | |
Greg Kroah-Hartman | a2dea4c | 2019-01-22 16:21:17 +0100 | [diff] [blame] | 1714 | opp_debug_create_one(new_opp, opp_table); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 1715 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1716 | if (!_opp_supported_by_regulators(new_opp, opp_table)) { |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 1717 | new_opp->available = false; |
| 1718 | dev_warn(dev, "%s: OPP not supported by regulators (%lu)\n", |
| 1719 | __func__, new_opp->rate); |
| 1720 | } |
| 1721 | |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 1722 | /* required-opps not fully initialized yet */ |
| 1723 | if (lazy_linking_pending(opp_table)) |
| 1724 | return 0; |
Dmitry Osipenko | cf65948 | 2021-01-18 03:55:14 +0300 | [diff] [blame] | 1725 | |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 1726 | _required_opps_available(new_opp, opp_table->required_opp_count); |
Dmitry Osipenko | cf65948 | 2021-01-18 03:55:14 +0300 | [diff] [blame] | 1727 | |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1728 | return 0; |
| 1729 | } |
| 1730 | |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 1731 | /** |
Viresh Kumar | b64b9c3f | 2015-10-15 21:42:44 +0530 | [diff] [blame] | 1732 | * _opp_add_v1() - Allocate a OPP based on v1 bindings. |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1733 | * @opp_table: OPP table |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1734 | * @dev: device for which we do this operation |
| 1735 | * @freq: Frequency in Hz for this OPP |
| 1736 | * @u_volt: Voltage in uVolts for this OPP |
| 1737 | * @dynamic: Dynamically added OPPs. |
| 1738 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1739 | * 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] | 1740 | * The opp is made available by default and it can be controlled using |
| 1741 | * dev_pm_opp_enable/disable functions and may be removed by dev_pm_opp_remove. |
| 1742 | * |
Viresh Kumar | 8f8d37b | 2015-09-04 13:47:24 +0530 | [diff] [blame] | 1743 | * NOTE: "dynamic" parameter impacts OPPs added by the dev_pm_opp_of_add_table |
| 1744 | * and freed by dev_pm_opp_of_remove_table. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1745 | * |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1746 | * Return: |
| 1747 | * 0 On success OR |
| 1748 | * Duplicate OPPs (both freq and volt are same) and opp->available |
| 1749 | * -EEXIST Freq are same and volt are different OR |
| 1750 | * Duplicate OPPs (both freq and volt are same) and !opp->available |
| 1751 | * -ENOMEM Memory allocation failure |
| 1752 | */ |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1753 | int _opp_add_v1(struct opp_table *opp_table, struct device *dev, |
| 1754 | unsigned long freq, long u_volt, bool dynamic) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1755 | { |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1756 | struct dev_pm_opp *new_opp; |
Viresh Kumar | 50f8cfb | 2016-02-09 10:30:37 +0530 | [diff] [blame] | 1757 | unsigned long tol; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1758 | int ret; |
| 1759 | |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1760 | new_opp = _opp_allocate(opp_table); |
| 1761 | if (!new_opp) |
| 1762 | return -ENOMEM; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1763 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1764 | /* populate the opp table */ |
| 1765 | new_opp->rate = freq; |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1766 | tol = u_volt * opp_table->voltage_tolerance_v1 / 100; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1767 | new_opp->supplies[0].u_volt = u_volt; |
| 1768 | new_opp->supplies[0].u_volt_min = u_volt - tol; |
| 1769 | new_opp->supplies[0].u_volt_max = u_volt + tol; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1770 | new_opp->available = true; |
Viresh Kumar | aa5f2f8 | 2015-07-29 16:23:00 +0530 | [diff] [blame] | 1771 | new_opp->dynamic = dynamic; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1772 | |
Viresh Kumar | a1e8c13 | 2018-04-06 14:35:45 +0530 | [diff] [blame] | 1773 | ret = _opp_add(dev, new_opp, opp_table, false); |
Viresh Kumar | 7f8538e | 2017-01-02 14:40:55 +0530 | [diff] [blame] | 1774 | if (ret) { |
| 1775 | /* Don't return error for duplicate OPPs */ |
| 1776 | if (ret == -EBUSY) |
| 1777 | ret = 0; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1778 | goto free_opp; |
Viresh Kumar | 7f8538e | 2017-01-02 14:40:55 +0530 | [diff] [blame] | 1779 | } |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1780 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1781 | /* |
| 1782 | * Notify the changes in the availability of the operable |
| 1783 | * frequency/voltage list. |
| 1784 | */ |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1785 | blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADD, new_opp); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1786 | return 0; |
| 1787 | |
| 1788 | free_opp: |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1789 | _opp_free(new_opp); |
| 1790 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1791 | return ret; |
| 1792 | } |
Viresh Kumar | 38393409 | 2014-11-25 16:04:18 +0530 | [diff] [blame] | 1793 | |
Viresh Kumar | 2746590 | 2015-07-29 16:23:02 +0530 | [diff] [blame] | 1794 | /** |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1795 | * dev_pm_opp_set_supported_hw() - Set supported platforms |
| 1796 | * @dev: Device for which supported-hw has to be set. |
| 1797 | * @versions: Array of hierarchy of versions to match. |
| 1798 | * @count: Number of elements in the array. |
| 1799 | * |
| 1800 | * This is required only for the V2 bindings, and it enables a platform to |
| 1801 | * specify the hierarchy of versions it supports. OPP layer will then enable |
| 1802 | * OPPs, which are available for those versions, based on its 'opp-supported-hw' |
| 1803 | * property. |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1804 | */ |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1805 | struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev, |
| 1806 | const u32 *versions, unsigned int count) |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1807 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1808 | struct opp_table *opp_table; |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1809 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1810 | opp_table = _add_opp_table(dev, false); |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1811 | if (IS_ERR(opp_table)) |
| 1812 | return opp_table; |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1813 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1814 | /* Make sure there are no concurrent readers while updating opp_table */ |
| 1815 | WARN_ON(!list_empty(&opp_table->opp_list)); |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1816 | |
Viresh Kumar | 25419de | 2018-05-22 16:38:08 +0530 | [diff] [blame] | 1817 | /* Another CPU that shares the OPP table has set the property ? */ |
| 1818 | if (opp_table->supported_hw) |
| 1819 | return opp_table; |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1820 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1821 | opp_table->supported_hw = kmemdup(versions, count * sizeof(*versions), |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1822 | GFP_KERNEL); |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1823 | if (!opp_table->supported_hw) { |
Viresh Kumar | 25419de | 2018-05-22 16:38:08 +0530 | [diff] [blame] | 1824 | dev_pm_opp_put_opp_table(opp_table); |
| 1825 | return ERR_PTR(-ENOMEM); |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1826 | } |
| 1827 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1828 | opp_table->supported_hw_count = count; |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1829 | |
| 1830 | return opp_table; |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1831 | } |
| 1832 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_supported_hw); |
| 1833 | |
| 1834 | /** |
| 1835 | * dev_pm_opp_put_supported_hw() - Releases resources blocked for supported hw |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1836 | * @opp_table: OPP table returned by dev_pm_opp_set_supported_hw(). |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1837 | * |
| 1838 | * This is required only for the V2 bindings, and is called for a matching |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1839 | * dev_pm_opp_set_supported_hw(). Until this is called, the opp_table structure |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1840 | * will not be freed. |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1841 | */ |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1842 | void dev_pm_opp_put_supported_hw(struct opp_table *opp_table) |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1843 | { |
Viresh Kumar | c7bf875 | 2020-11-06 12:16:52 +0530 | [diff] [blame] | 1844 | if (unlikely(!opp_table)) |
| 1845 | return; |
| 1846 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1847 | /* Make sure there are no concurrent readers while updating opp_table */ |
| 1848 | WARN_ON(!list_empty(&opp_table->opp_list)); |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1849 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1850 | kfree(opp_table->supported_hw); |
| 1851 | opp_table->supported_hw = NULL; |
| 1852 | opp_table->supported_hw_count = 0; |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1853 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1854 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1855 | } |
| 1856 | EXPORT_SYMBOL_GPL(dev_pm_opp_put_supported_hw); |
| 1857 | |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1858 | /** |
| 1859 | * dev_pm_opp_set_prop_name() - Set prop-extn name |
Viresh Kumar | a5da644 | 2016-02-16 14:17:52 +0530 | [diff] [blame] | 1860 | * @dev: Device for which the prop-name has to be set. |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1861 | * @name: name to postfix to properties. |
| 1862 | * |
| 1863 | * This is required only for the V2 bindings, and it enables a platform to |
| 1864 | * specify the extn to be used for certain property names. The properties to |
| 1865 | * which the extension will apply are opp-microvolt and opp-microamp. OPP core |
| 1866 | * should postfix the property name with -<name> while looking for them. |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1867 | */ |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1868 | struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name) |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1869 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1870 | struct opp_table *opp_table; |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1871 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1872 | opp_table = _add_opp_table(dev, false); |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1873 | if (IS_ERR(opp_table)) |
| 1874 | return opp_table; |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1875 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1876 | /* Make sure there are no concurrent readers while updating opp_table */ |
| 1877 | WARN_ON(!list_empty(&opp_table->opp_list)); |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1878 | |
Viresh Kumar | 878ec1a | 2018-05-22 16:38:08 +0530 | [diff] [blame] | 1879 | /* Another CPU that shares the OPP table has set the property ? */ |
| 1880 | if (opp_table->prop_name) |
| 1881 | return opp_table; |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1882 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1883 | opp_table->prop_name = kstrdup(name, GFP_KERNEL); |
| 1884 | if (!opp_table->prop_name) { |
Viresh Kumar | 878ec1a | 2018-05-22 16:38:08 +0530 | [diff] [blame] | 1885 | dev_pm_opp_put_opp_table(opp_table); |
| 1886 | return ERR_PTR(-ENOMEM); |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1887 | } |
| 1888 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1889 | return opp_table; |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1890 | } |
| 1891 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_prop_name); |
| 1892 | |
| 1893 | /** |
| 1894 | * dev_pm_opp_put_prop_name() - Releases resources blocked for prop-name |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1895 | * @opp_table: OPP table returned by dev_pm_opp_set_prop_name(). |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1896 | * |
| 1897 | * This is required only for the V2 bindings, and is called for a matching |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1898 | * dev_pm_opp_set_prop_name(). Until this is called, the opp_table structure |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1899 | * will not be freed. |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1900 | */ |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1901 | void dev_pm_opp_put_prop_name(struct opp_table *opp_table) |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1902 | { |
Viresh Kumar | c7bf875 | 2020-11-06 12:16:52 +0530 | [diff] [blame] | 1903 | if (unlikely(!opp_table)) |
| 1904 | return; |
| 1905 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1906 | /* Make sure there are no concurrent readers while updating opp_table */ |
| 1907 | WARN_ON(!list_empty(&opp_table->opp_list)); |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1908 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1909 | kfree(opp_table->prop_name); |
| 1910 | opp_table->prop_name = NULL; |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1911 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1912 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1913 | } |
| 1914 | EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name); |
| 1915 | |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1916 | /** |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1917 | * dev_pm_opp_set_regulators() - Set regulator names for the device |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1918 | * @dev: Device for which regulator name is being set. |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1919 | * @names: Array of pointers to the names of the regulator. |
| 1920 | * @count: Number of regulators. |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1921 | * |
| 1922 | * 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] | 1923 | * device's regulators, as the core would be required to switch voltages as |
| 1924 | * well. |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1925 | * |
| 1926 | * This must be called before any OPPs are initialized for the device. |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1927 | */ |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1928 | struct opp_table *dev_pm_opp_set_regulators(struct device *dev, |
| 1929 | const char * const names[], |
| 1930 | unsigned int count) |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1931 | { |
Viresh Kumar | 38bb343 | 2021-01-19 11:58:58 +0530 | [diff] [blame] | 1932 | struct dev_pm_opp_supply *supplies; |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1933 | struct opp_table *opp_table; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1934 | struct regulator *reg; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1935 | int ret, i; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1936 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 1937 | opp_table = _add_opp_table(dev, false); |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 1938 | if (IS_ERR(opp_table)) |
| 1939 | return opp_table; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1940 | |
| 1941 | /* This should be called before OPPs are initialized */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1942 | if (WARN_ON(!list_empty(&opp_table->opp_list))) { |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1943 | ret = -EBUSY; |
| 1944 | goto err; |
| 1945 | } |
| 1946 | |
Viresh Kumar | 779b783 | 2018-05-22 16:38:08 +0530 | [diff] [blame] | 1947 | /* Another CPU that shares the OPP table has set the regulators ? */ |
| 1948 | if (opp_table->regulators) |
| 1949 | return opp_table; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1950 | |
| 1951 | opp_table->regulators = kmalloc_array(count, |
| 1952 | sizeof(*opp_table->regulators), |
| 1953 | GFP_KERNEL); |
| 1954 | if (!opp_table->regulators) { |
| 1955 | ret = -ENOMEM; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1956 | goto err; |
| 1957 | } |
| 1958 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1959 | for (i = 0; i < count; i++) { |
| 1960 | reg = regulator_get_optional(dev, names[i]); |
| 1961 | if (IS_ERR(reg)) { |
| 1962 | ret = PTR_ERR(reg); |
| 1963 | if (ret != -EPROBE_DEFER) |
| 1964 | dev_err(dev, "%s: no regulator (%s) found: %d\n", |
| 1965 | __func__, names[i], ret); |
| 1966 | goto free_regulators; |
| 1967 | } |
| 1968 | |
| 1969 | opp_table->regulators[i] = reg; |
| 1970 | } |
| 1971 | |
| 1972 | opp_table->regulator_count = count; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1973 | |
Viresh Kumar | 38bb343 | 2021-01-19 11:58:58 +0530 | [diff] [blame] | 1974 | supplies = kmalloc_array(count * 2, sizeof(*supplies), GFP_KERNEL); |
| 1975 | if (!supplies) { |
| 1976 | ret = -ENOMEM; |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 1977 | goto free_regulators; |
Viresh Kumar | 38bb343 | 2021-01-19 11:58:58 +0530 | [diff] [blame] | 1978 | } |
| 1979 | |
| 1980 | mutex_lock(&opp_table->lock); |
| 1981 | opp_table->sod_supplies = supplies; |
| 1982 | if (opp_table->set_opp_data) { |
| 1983 | opp_table->set_opp_data->old_opp.supplies = supplies; |
| 1984 | opp_table->set_opp_data->new_opp.supplies = supplies + count; |
| 1985 | } |
| 1986 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 1987 | |
Stephen Boyd | 91291d9 | 2016-11-30 16:21:25 +0530 | [diff] [blame] | 1988 | return opp_table; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1989 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1990 | free_regulators: |
Marek Szyprowski | 24957db | 2019-10-17 12:27:58 +0200 | [diff] [blame] | 1991 | while (i != 0) |
| 1992 | regulator_put(opp_table->regulators[--i]); |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1993 | |
| 1994 | kfree(opp_table->regulators); |
| 1995 | opp_table->regulators = NULL; |
Viresh Kumar | 46f48ac | 2018-12-11 16:39:36 +0530 | [diff] [blame] | 1996 | opp_table->regulator_count = -1; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1997 | err: |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1998 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1999 | |
Stephen Boyd | 91291d9 | 2016-11-30 16:21:25 +0530 | [diff] [blame] | 2000 | return ERR_PTR(ret); |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2001 | } |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2002 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_regulators); |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2003 | |
| 2004 | /** |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2005 | * dev_pm_opp_put_regulators() - Releases resources blocked for regulator |
| 2006 | * @opp_table: OPP table returned from dev_pm_opp_set_regulators(). |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2007 | */ |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2008 | void dev_pm_opp_put_regulators(struct opp_table *opp_table) |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2009 | { |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2010 | int i; |
| 2011 | |
Viresh Kumar | c7bf875 | 2020-11-06 12:16:52 +0530 | [diff] [blame] | 2012 | if (unlikely(!opp_table)) |
| 2013 | return; |
| 2014 | |
Viresh Kumar | 779b783 | 2018-05-22 16:38:08 +0530 | [diff] [blame] | 2015 | if (!opp_table->regulators) |
| 2016 | goto put_opp_table; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2017 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 2018 | /* Make sure there are no concurrent readers while updating opp_table */ |
| 2019 | WARN_ON(!list_empty(&opp_table->opp_list)); |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2020 | |
Viresh Kumar | 72f80ce | 2020-08-13 08:38:37 +0530 | [diff] [blame] | 2021 | if (opp_table->enabled) { |
Kamil Konieczny | 8d45719 | 2019-07-19 17:05:32 +0200 | [diff] [blame] | 2022 | for (i = opp_table->regulator_count - 1; i >= 0; i--) |
| 2023 | regulator_disable(opp_table->regulators[i]); |
Kamil Konieczny | 8d45719 | 2019-07-19 17:05:32 +0200 | [diff] [blame] | 2024 | } |
| 2025 | |
Marek Szyprowski | 24957db | 2019-10-17 12:27:58 +0200 | [diff] [blame] | 2026 | for (i = opp_table->regulator_count - 1; i >= 0; i--) |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2027 | regulator_put(opp_table->regulators[i]); |
| 2028 | |
Viresh Kumar | 38bb343 | 2021-01-19 11:58:58 +0530 | [diff] [blame] | 2029 | mutex_lock(&opp_table->lock); |
| 2030 | if (opp_table->set_opp_data) { |
| 2031 | opp_table->set_opp_data->old_opp.supplies = NULL; |
| 2032 | opp_table->set_opp_data->new_opp.supplies = NULL; |
| 2033 | } |
| 2034 | |
| 2035 | kfree(opp_table->sod_supplies); |
| 2036 | opp_table->sod_supplies = NULL; |
| 2037 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 2038 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2039 | kfree(opp_table->regulators); |
| 2040 | opp_table->regulators = NULL; |
Viresh Kumar | 46f48ac | 2018-12-11 16:39:36 +0530 | [diff] [blame] | 2041 | opp_table->regulator_count = -1; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2042 | |
Viresh Kumar | 779b783 | 2018-05-22 16:38:08 +0530 | [diff] [blame] | 2043 | put_opp_table: |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 2044 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2045 | } |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 2046 | EXPORT_SYMBOL_GPL(dev_pm_opp_put_regulators); |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 2047 | |
Viresh Kumar | 38393409 | 2014-11-25 16:04:18 +0530 | [diff] [blame] | 2048 | /** |
Viresh Kumar | 829a4e8 | 2017-06-21 10:29:13 +0530 | [diff] [blame] | 2049 | * dev_pm_opp_set_clkname() - Set clk name for the device |
| 2050 | * @dev: Device for which clk name is being set. |
| 2051 | * @name: Clk name. |
| 2052 | * |
| 2053 | * In order to support OPP switching, OPP layer needs to get pointer to the |
| 2054 | * clock for the device. Simple cases work fine without using this routine (i.e. |
| 2055 | * by passing connection-id as NULL), but for a device with multiple clocks |
| 2056 | * available, the OPP core needs to know the exact name of the clk to use. |
| 2057 | * |
| 2058 | * This must be called before any OPPs are initialized for the device. |
| 2059 | */ |
| 2060 | struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name) |
| 2061 | { |
| 2062 | struct opp_table *opp_table; |
| 2063 | int ret; |
| 2064 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 2065 | opp_table = _add_opp_table(dev, false); |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 2066 | if (IS_ERR(opp_table)) |
| 2067 | return opp_table; |
Viresh Kumar | 829a4e8 | 2017-06-21 10:29:13 +0530 | [diff] [blame] | 2068 | |
| 2069 | /* This should be called before OPPs are initialized */ |
| 2070 | if (WARN_ON(!list_empty(&opp_table->opp_list))) { |
| 2071 | ret = -EBUSY; |
| 2072 | goto err; |
| 2073 | } |
| 2074 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 2075 | /* clk shouldn't be initialized at this point */ |
| 2076 | if (WARN_ON(opp_table->clk)) { |
| 2077 | ret = -EBUSY; |
| 2078 | goto err; |
| 2079 | } |
Viresh Kumar | 829a4e8 | 2017-06-21 10:29:13 +0530 | [diff] [blame] | 2080 | |
| 2081 | /* Find clk for the device */ |
| 2082 | opp_table->clk = clk_get(dev, name); |
| 2083 | if (IS_ERR(opp_table->clk)) { |
| 2084 | ret = PTR_ERR(opp_table->clk); |
| 2085 | if (ret != -EPROBE_DEFER) { |
| 2086 | dev_err(dev, "%s: Couldn't find clock: %d\n", __func__, |
| 2087 | ret); |
| 2088 | } |
| 2089 | goto err; |
| 2090 | } |
| 2091 | |
| 2092 | return opp_table; |
| 2093 | |
| 2094 | err: |
| 2095 | dev_pm_opp_put_opp_table(opp_table); |
| 2096 | |
| 2097 | return ERR_PTR(ret); |
| 2098 | } |
| 2099 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_clkname); |
| 2100 | |
| 2101 | /** |
| 2102 | * dev_pm_opp_put_clkname() - Releases resources blocked for clk. |
| 2103 | * @opp_table: OPP table returned from dev_pm_opp_set_clkname(). |
| 2104 | */ |
| 2105 | void dev_pm_opp_put_clkname(struct opp_table *opp_table) |
| 2106 | { |
Viresh Kumar | c7bf875 | 2020-11-06 12:16:52 +0530 | [diff] [blame] | 2107 | if (unlikely(!opp_table)) |
| 2108 | return; |
| 2109 | |
Viresh Kumar | 829a4e8 | 2017-06-21 10:29:13 +0530 | [diff] [blame] | 2110 | /* Make sure there are no concurrent readers while updating opp_table */ |
| 2111 | WARN_ON(!list_empty(&opp_table->opp_list)); |
| 2112 | |
| 2113 | clk_put(opp_table->clk); |
| 2114 | opp_table->clk = ERR_PTR(-EINVAL); |
| 2115 | |
| 2116 | dev_pm_opp_put_opp_table(opp_table); |
| 2117 | } |
| 2118 | EXPORT_SYMBOL_GPL(dev_pm_opp_put_clkname); |
| 2119 | |
| 2120 | /** |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2121 | * dev_pm_opp_register_set_opp_helper() - Register custom set OPP helper |
| 2122 | * @dev: Device for which the helper is getting registered. |
| 2123 | * @set_opp: Custom set OPP helper. |
| 2124 | * |
| 2125 | * This is useful to support complex platforms (like platforms with multiple |
| 2126 | * regulators per device), instead of the generic OPP set rate helper. |
| 2127 | * |
| 2128 | * This must be called before any OPPs are initialized for the device. |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2129 | */ |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 2130 | struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev, |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2131 | int (*set_opp)(struct dev_pm_set_opp_data *data)) |
| 2132 | { |
Viresh Kumar | 38bb343 | 2021-01-19 11:58:58 +0530 | [diff] [blame] | 2133 | struct dev_pm_set_opp_data *data; |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2134 | struct opp_table *opp_table; |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2135 | |
| 2136 | if (!set_opp) |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 2137 | return ERR_PTR(-EINVAL); |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2138 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 2139 | opp_table = _add_opp_table(dev, false); |
Viresh Kumar | 47efcbc | 2020-10-20 16:03:15 +0530 | [diff] [blame] | 2140 | if (IS_ERR(opp_table)) |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 2141 | return opp_table; |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2142 | |
| 2143 | /* This should be called before OPPs are initialized */ |
| 2144 | if (WARN_ON(!list_empty(&opp_table->opp_list))) { |
Viresh Kumar | 5019acc | 2018-05-22 16:38:08 +0530 | [diff] [blame] | 2145 | dev_pm_opp_put_opp_table(opp_table); |
| 2146 | return ERR_PTR(-EBUSY); |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2147 | } |
| 2148 | |
Viresh Kumar | 5019acc | 2018-05-22 16:38:08 +0530 | [diff] [blame] | 2149 | /* Another CPU that shares the OPP table has set the helper ? */ |
Viresh Kumar | 38bb343 | 2021-01-19 11:58:58 +0530 | [diff] [blame] | 2150 | if (opp_table->set_opp) |
| 2151 | return opp_table; |
| 2152 | |
| 2153 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
| 2154 | if (!data) |
| 2155 | return ERR_PTR(-ENOMEM); |
| 2156 | |
| 2157 | mutex_lock(&opp_table->lock); |
| 2158 | opp_table->set_opp_data = data; |
| 2159 | if (opp_table->sod_supplies) { |
| 2160 | data->old_opp.supplies = opp_table->sod_supplies; |
| 2161 | data->new_opp.supplies = opp_table->sod_supplies + |
| 2162 | opp_table->regulator_count; |
| 2163 | } |
| 2164 | mutex_unlock(&opp_table->lock); |
| 2165 | |
| 2166 | opp_table->set_opp = set_opp; |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2167 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 2168 | return opp_table; |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2169 | } |
| 2170 | EXPORT_SYMBOL_GPL(dev_pm_opp_register_set_opp_helper); |
| 2171 | |
| 2172 | /** |
Viresh Kumar | 604a7ae | 2017-10-05 17:26:21 +0530 | [diff] [blame] | 2173 | * dev_pm_opp_unregister_set_opp_helper() - Releases resources blocked for |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2174 | * set_opp helper |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 2175 | * @opp_table: OPP table returned from dev_pm_opp_register_set_opp_helper(). |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2176 | * |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 2177 | * Release resources blocked for platform specific set_opp helper. |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2178 | */ |
Viresh Kumar | 604a7ae | 2017-10-05 17:26:21 +0530 | [diff] [blame] | 2179 | void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table) |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2180 | { |
Viresh Kumar | c7bf875 | 2020-11-06 12:16:52 +0530 | [diff] [blame] | 2181 | if (unlikely(!opp_table)) |
| 2182 | return; |
| 2183 | |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2184 | /* Make sure there are no concurrent readers while updating opp_table */ |
| 2185 | WARN_ON(!list_empty(&opp_table->opp_list)); |
| 2186 | |
| 2187 | opp_table->set_opp = NULL; |
Viresh Kumar | 38bb343 | 2021-01-19 11:58:58 +0530 | [diff] [blame] | 2188 | |
| 2189 | mutex_lock(&opp_table->lock); |
| 2190 | kfree(opp_table->set_opp_data); |
| 2191 | opp_table->set_opp_data = NULL; |
| 2192 | mutex_unlock(&opp_table->lock); |
| 2193 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 2194 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2195 | } |
Viresh Kumar | 604a7ae | 2017-10-05 17:26:21 +0530 | [diff] [blame] | 2196 | EXPORT_SYMBOL_GPL(dev_pm_opp_unregister_set_opp_helper); |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2197 | |
Dmitry Osipenko | a3c47af | 2021-01-18 03:55:20 +0300 | [diff] [blame] | 2198 | static void devm_pm_opp_unregister_set_opp_helper(void *data) |
| 2199 | { |
| 2200 | dev_pm_opp_unregister_set_opp_helper(data); |
| 2201 | } |
| 2202 | |
| 2203 | /** |
| 2204 | * devm_pm_opp_register_set_opp_helper() - Register custom set OPP helper |
| 2205 | * @dev: Device for which the helper is getting registered. |
| 2206 | * @set_opp: Custom set OPP helper. |
| 2207 | * |
| 2208 | * This is a resource-managed version of dev_pm_opp_register_set_opp_helper(). |
| 2209 | * |
| 2210 | * Return: pointer to 'struct opp_table' on success and errorno otherwise. |
| 2211 | */ |
| 2212 | struct opp_table * |
| 2213 | devm_pm_opp_register_set_opp_helper(struct device *dev, |
| 2214 | int (*set_opp)(struct dev_pm_set_opp_data *data)) |
| 2215 | { |
| 2216 | struct opp_table *opp_table; |
| 2217 | int err; |
| 2218 | |
| 2219 | opp_table = dev_pm_opp_register_set_opp_helper(dev, set_opp); |
| 2220 | if (IS_ERR(opp_table)) |
| 2221 | return opp_table; |
| 2222 | |
| 2223 | err = devm_add_action_or_reset(dev, devm_pm_opp_unregister_set_opp_helper, |
| 2224 | opp_table); |
| 2225 | if (err) |
| 2226 | return ERR_PTR(err); |
| 2227 | |
| 2228 | return opp_table; |
| 2229 | } |
| 2230 | EXPORT_SYMBOL_GPL(devm_pm_opp_register_set_opp_helper); |
| 2231 | |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2232 | static void _opp_detach_genpd(struct opp_table *opp_table) |
| 2233 | { |
| 2234 | int index; |
| 2235 | |
Viresh Kumar | cb60e96 | 2020-08-31 11:22:37 +0530 | [diff] [blame] | 2236 | if (!opp_table->genpd_virt_devs) |
| 2237 | return; |
| 2238 | |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2239 | for (index = 0; index < opp_table->required_opp_count; index++) { |
| 2240 | if (!opp_table->genpd_virt_devs[index]) |
| 2241 | continue; |
| 2242 | |
| 2243 | dev_pm_domain_detach(opp_table->genpd_virt_devs[index], false); |
| 2244 | opp_table->genpd_virt_devs[index] = NULL; |
| 2245 | } |
Viresh Kumar | c0ab9e0 | 2019-05-08 15:43:36 +0530 | [diff] [blame] | 2246 | |
| 2247 | kfree(opp_table->genpd_virt_devs); |
| 2248 | opp_table->genpd_virt_devs = NULL; |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2249 | } |
| 2250 | |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 2251 | /** |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2252 | * dev_pm_opp_attach_genpd - Attach genpd(s) for the device and save virtual device pointer |
| 2253 | * @dev: Consumer device for which the genpd is getting attached. |
| 2254 | * @names: Null terminated array of pointers containing names of genpd to attach. |
Viresh Kumar | 17a8f86 | 2019-07-08 11:24:56 +0530 | [diff] [blame] | 2255 | * @virt_devs: Pointer to return the array of virtual devices. |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2256 | * |
| 2257 | * Multiple generic power domains for a device are supported with the help of |
| 2258 | * virtual genpd devices, which are created for each consumer device - genpd |
| 2259 | * pair. These are the device structures which are attached to the power domain |
| 2260 | * 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] | 2261 | * The same API also works for the case where single genpd is available and so |
| 2262 | * we don't need to support that separately. |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2263 | * |
| 2264 | * 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] | 2265 | * "dev", as only that has details of the genpd names. |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2266 | * |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2267 | * This helper needs to be called once with a list of all genpd to attach. |
| 2268 | * 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] | 2269 | * |
| 2270 | * The order of entries in the names array must match the order in which |
| 2271 | * "required-opps" are added in DT. |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2272 | */ |
Viresh Kumar | 17a8f86 | 2019-07-08 11:24:56 +0530 | [diff] [blame] | 2273 | struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, |
| 2274 | const char **names, struct device ***virt_devs) |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2275 | { |
| 2276 | struct opp_table *opp_table; |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2277 | struct device *virt_dev; |
Viresh Kumar | baea35e | 2019-07-17 11:20:17 +0530 | [diff] [blame] | 2278 | int index = 0, ret = -EINVAL; |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2279 | const char **name = names; |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2280 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 2281 | opp_table = _add_opp_table(dev, false); |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 2282 | if (IS_ERR(opp_table)) |
| 2283 | return opp_table; |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2284 | |
Viresh Kumar | cb60e96 | 2020-08-31 11:22:37 +0530 | [diff] [blame] | 2285 | if (opp_table->genpd_virt_devs) |
| 2286 | return opp_table; |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2287 | |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2288 | /* |
| 2289 | * If the genpd's OPP table isn't already initialized, parsing of the |
| 2290 | * required-opps fail for dev. We should retry this after genpd's OPP |
| 2291 | * table is added. |
| 2292 | */ |
| 2293 | if (!opp_table->required_opp_count) { |
| 2294 | ret = -EPROBE_DEFER; |
| 2295 | goto put_table; |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2296 | } |
| 2297 | |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2298 | mutex_lock(&opp_table->genpd_virt_dev_lock); |
| 2299 | |
Viresh Kumar | c0ab9e0 | 2019-05-08 15:43:36 +0530 | [diff] [blame] | 2300 | opp_table->genpd_virt_devs = kcalloc(opp_table->required_opp_count, |
| 2301 | sizeof(*opp_table->genpd_virt_devs), |
| 2302 | GFP_KERNEL); |
| 2303 | if (!opp_table->genpd_virt_devs) |
| 2304 | goto unlock; |
| 2305 | |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2306 | while (*name) { |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2307 | if (index >= opp_table->required_opp_count) { |
| 2308 | dev_err(dev, "Index can't be greater than required-opp-count - 1, %s (%d : %d)\n", |
| 2309 | *name, opp_table->required_opp_count, index); |
| 2310 | goto err; |
| 2311 | } |
| 2312 | |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2313 | virt_dev = dev_pm_domain_attach_by_name(dev, *name); |
| 2314 | if (IS_ERR(virt_dev)) { |
| 2315 | ret = PTR_ERR(virt_dev); |
| 2316 | dev_err(dev, "Couldn't attach to pm_domain: %d\n", ret); |
| 2317 | goto err; |
| 2318 | } |
| 2319 | |
| 2320 | opp_table->genpd_virt_devs[index] = virt_dev; |
Viresh Kumar | baea35e | 2019-07-17 11:20:17 +0530 | [diff] [blame] | 2321 | index++; |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2322 | name++; |
| 2323 | } |
| 2324 | |
Viresh Kumar | 17a8f86 | 2019-07-08 11:24:56 +0530 | [diff] [blame] | 2325 | if (virt_devs) |
| 2326 | *virt_devs = opp_table->genpd_virt_devs; |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2327 | mutex_unlock(&opp_table->genpd_virt_dev_lock); |
| 2328 | |
| 2329 | return opp_table; |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2330 | |
| 2331 | err: |
| 2332 | _opp_detach_genpd(opp_table); |
Viresh Kumar | c0ab9e0 | 2019-05-08 15:43:36 +0530 | [diff] [blame] | 2333 | unlock: |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2334 | mutex_unlock(&opp_table->genpd_virt_dev_lock); |
| 2335 | |
| 2336 | put_table: |
| 2337 | dev_pm_opp_put_opp_table(opp_table); |
| 2338 | |
| 2339 | return ERR_PTR(ret); |
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 | EXPORT_SYMBOL_GPL(dev_pm_opp_attach_genpd); |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2342 | |
| 2343 | /** |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2344 | * dev_pm_opp_detach_genpd() - Detach genpd(s) from the device. |
| 2345 | * @opp_table: OPP table returned by dev_pm_opp_attach_genpd(). |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2346 | * |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2347 | * This detaches the genpd(s), resets the virtual device pointers, and puts the |
| 2348 | * OPP table. |
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 | void dev_pm_opp_detach_genpd(struct opp_table *opp_table) |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2351 | { |
Viresh Kumar | c7bf875 | 2020-11-06 12:16:52 +0530 | [diff] [blame] | 2352 | if (unlikely(!opp_table)) |
| 2353 | return; |
| 2354 | |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2355 | /* |
| 2356 | * Acquire genpd_virt_dev_lock to make sure virt_dev isn't getting |
| 2357 | * used in parallel. |
| 2358 | */ |
| 2359 | mutex_lock(&opp_table->genpd_virt_dev_lock); |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2360 | _opp_detach_genpd(opp_table); |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2361 | mutex_unlock(&opp_table->genpd_virt_dev_lock); |
| 2362 | |
Viresh Kumar | 6319aee | 2019-05-08 15:19:13 +0530 | [diff] [blame] | 2363 | dev_pm_opp_put_opp_table(opp_table); |
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 | EXPORT_SYMBOL_GPL(dev_pm_opp_detach_genpd); |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2366 | |
Dmitry Osipenko | b4b9e22 | 2021-01-18 03:55:21 +0300 | [diff] [blame] | 2367 | static void devm_pm_opp_detach_genpd(void *data) |
| 2368 | { |
| 2369 | dev_pm_opp_detach_genpd(data); |
| 2370 | } |
| 2371 | |
| 2372 | /** |
| 2373 | * devm_pm_opp_attach_genpd - Attach genpd(s) for the device and save virtual |
| 2374 | * device pointer |
| 2375 | * @dev: Consumer device for which the genpd is getting attached. |
| 2376 | * @names: Null terminated array of pointers containing names of genpd to attach. |
| 2377 | * @virt_devs: Pointer to return the array of virtual devices. |
| 2378 | * |
| 2379 | * This is a resource-managed version of dev_pm_opp_attach_genpd(). |
| 2380 | * |
| 2381 | * Return: pointer to 'struct opp_table' on success and errorno otherwise. |
| 2382 | */ |
| 2383 | struct opp_table * |
| 2384 | devm_pm_opp_attach_genpd(struct device *dev, const char **names, |
| 2385 | struct device ***virt_devs) |
| 2386 | { |
| 2387 | struct opp_table *opp_table; |
| 2388 | int err; |
| 2389 | |
| 2390 | opp_table = dev_pm_opp_attach_genpd(dev, names, virt_devs); |
| 2391 | if (IS_ERR(opp_table)) |
| 2392 | return opp_table; |
| 2393 | |
| 2394 | err = devm_add_action_or_reset(dev, devm_pm_opp_detach_genpd, |
| 2395 | opp_table); |
| 2396 | if (err) |
| 2397 | return ERR_PTR(err); |
| 2398 | |
| 2399 | return opp_table; |
| 2400 | } |
| 2401 | EXPORT_SYMBOL_GPL(devm_pm_opp_attach_genpd); |
| 2402 | |
Viresh Kumar | 4f018bc | 2018-06-26 16:29:34 +0530 | [diff] [blame] | 2403 | /** |
Saravana Kannan | 7d8658ef | 2021-02-04 16:14:22 +0800 | [diff] [blame] | 2404 | * dev_pm_opp_xlate_required_opp() - Find required OPP for @src_table OPP. |
| 2405 | * @src_table: OPP table which has @dst_table as one of its required OPP table. |
| 2406 | * @dst_table: Required OPP table of the @src_table. |
| 2407 | * @src_opp: OPP from the @src_table. |
| 2408 | * |
| 2409 | * This function returns the OPP (present in @dst_table) pointed out by the |
| 2410 | * "required-opps" property of the @src_opp (present in @src_table). |
| 2411 | * |
| 2412 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 2413 | * use. |
| 2414 | * |
| 2415 | * Return: pointer to 'struct dev_pm_opp' on success and errorno otherwise. |
| 2416 | */ |
| 2417 | struct dev_pm_opp *dev_pm_opp_xlate_required_opp(struct opp_table *src_table, |
| 2418 | struct opp_table *dst_table, |
| 2419 | struct dev_pm_opp *src_opp) |
| 2420 | { |
| 2421 | struct dev_pm_opp *opp, *dest_opp = ERR_PTR(-ENODEV); |
| 2422 | int i; |
| 2423 | |
| 2424 | if (!src_table || !dst_table || !src_opp || |
| 2425 | !src_table->required_opp_tables) |
| 2426 | return ERR_PTR(-EINVAL); |
| 2427 | |
| 2428 | /* required-opps not fully initialized yet */ |
| 2429 | if (lazy_linking_pending(src_table)) |
| 2430 | return ERR_PTR(-EBUSY); |
| 2431 | |
| 2432 | for (i = 0; i < src_table->required_opp_count; i++) { |
| 2433 | if (src_table->required_opp_tables[i] == dst_table) { |
| 2434 | mutex_lock(&src_table->lock); |
| 2435 | |
| 2436 | list_for_each_entry(opp, &src_table->opp_list, node) { |
| 2437 | if (opp == src_opp) { |
| 2438 | dest_opp = opp->required_opps[i]; |
| 2439 | dev_pm_opp_get(dest_opp); |
| 2440 | break; |
| 2441 | } |
| 2442 | } |
| 2443 | |
| 2444 | mutex_unlock(&src_table->lock); |
| 2445 | break; |
| 2446 | } |
| 2447 | } |
| 2448 | |
| 2449 | if (IS_ERR(dest_opp)) { |
| 2450 | pr_err("%s: Couldn't find matching OPP (%p: %p)\n", __func__, |
| 2451 | src_table, dst_table); |
| 2452 | } |
| 2453 | |
| 2454 | return dest_opp; |
| 2455 | } |
| 2456 | EXPORT_SYMBOL_GPL(dev_pm_opp_xlate_required_opp); |
| 2457 | |
| 2458 | /** |
Viresh Kumar | c8a5910 | 2018-11-02 14:36:42 +0530 | [diff] [blame] | 2459 | * dev_pm_opp_xlate_performance_state() - Find required OPP's pstate for src_table. |
| 2460 | * @src_table: OPP table which has dst_table as one of its required OPP table. |
| 2461 | * @dst_table: Required OPP table of the src_table. |
| 2462 | * @pstate: Current performance state of the src_table. |
| 2463 | * |
| 2464 | * This Returns pstate of the OPP (present in @dst_table) pointed out by the |
| 2465 | * "required-opps" property of the OPP (present in @src_table) which has |
| 2466 | * performance state set to @pstate. |
| 2467 | * |
| 2468 | * Return: Zero or positive performance state on success, otherwise negative |
| 2469 | * value on errors. |
| 2470 | */ |
| 2471 | int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, |
| 2472 | struct opp_table *dst_table, |
| 2473 | unsigned int pstate) |
| 2474 | { |
| 2475 | struct dev_pm_opp *opp; |
| 2476 | int dest_pstate = -EINVAL; |
| 2477 | int i; |
| 2478 | |
Viresh Kumar | c8a5910 | 2018-11-02 14:36:42 +0530 | [diff] [blame] | 2479 | /* |
| 2480 | * Normally the src_table will have the "required_opps" property set to |
| 2481 | * point to one of the OPPs in the dst_table, but in some cases the |
| 2482 | * genpd and its master have one to one mapping of performance states |
| 2483 | * and so none of them have the "required-opps" property set. Return the |
| 2484 | * pstate of the src_table as it is in such cases. |
| 2485 | */ |
Dmitry Osipenko | f2f4d2b | 2021-01-18 03:55:23 +0300 | [diff] [blame] | 2486 | if (!src_table || !src_table->required_opp_count) |
Viresh Kumar | c8a5910 | 2018-11-02 14:36:42 +0530 | [diff] [blame] | 2487 | return pstate; |
| 2488 | |
Viresh Kumar | 7eba0c7 | 2019-11-25 13:57:58 +0530 | [diff] [blame] | 2489 | /* required-opps not fully initialized yet */ |
| 2490 | if (lazy_linking_pending(src_table)) |
| 2491 | return -EBUSY; |
| 2492 | |
Viresh Kumar | c8a5910 | 2018-11-02 14:36:42 +0530 | [diff] [blame] | 2493 | for (i = 0; i < src_table->required_opp_count; i++) { |
| 2494 | if (src_table->required_opp_tables[i]->np == dst_table->np) |
| 2495 | break; |
| 2496 | } |
| 2497 | |
| 2498 | if (unlikely(i == src_table->required_opp_count)) { |
| 2499 | pr_err("%s: Couldn't find matching OPP table (%p: %p)\n", |
| 2500 | __func__, src_table, dst_table); |
| 2501 | return -EINVAL; |
| 2502 | } |
| 2503 | |
| 2504 | mutex_lock(&src_table->lock); |
| 2505 | |
| 2506 | list_for_each_entry(opp, &src_table->opp_list, node) { |
| 2507 | if (opp->pstate == pstate) { |
| 2508 | dest_pstate = opp->required_opps[i]->pstate; |
| 2509 | goto unlock; |
| 2510 | } |
| 2511 | } |
| 2512 | |
| 2513 | pr_err("%s: Couldn't find matching OPP (%p: %p)\n", __func__, src_table, |
| 2514 | dst_table); |
| 2515 | |
| 2516 | unlock: |
| 2517 | mutex_unlock(&src_table->lock); |
| 2518 | |
| 2519 | return dest_pstate; |
| 2520 | } |
| 2521 | |
| 2522 | /** |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2523 | * dev_pm_opp_add() - Add an OPP table from a table definitions |
| 2524 | * @dev: device for which we do this operation |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 2525 | * @freq: Frequency in Hz for this OPP |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2526 | * @u_volt: Voltage in uVolts for this OPP |
| 2527 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 2528 | * 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] | 2529 | * 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] | 2530 | * dev_pm_opp_enable/disable functions. |
| 2531 | * |
Viresh Kumar | a7470db | 2014-11-25 16:04:17 +0530 | [diff] [blame] | 2532 | * Return: |
| 2533 | * 0 On success OR |
| 2534 | * Duplicate OPPs (both freq and volt are same) and opp->available |
| 2535 | * -EEXIST Freq are same and volt are different OR |
| 2536 | * Duplicate OPPs (both freq and volt are same) and !opp->available |
Viresh Kumar | 38393409 | 2014-11-25 16:04:18 +0530 | [diff] [blame] | 2537 | * -ENOMEM Memory allocation failure |
Viresh Kumar | a7470db | 2014-11-25 16:04:17 +0530 | [diff] [blame] | 2538 | */ |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2539 | int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt) |
| 2540 | { |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 2541 | struct opp_table *opp_table; |
| 2542 | int ret; |
| 2543 | |
Viresh Kumar | 32439ac | 2021-01-28 12:05:22 +0530 | [diff] [blame] | 2544 | opp_table = _add_opp_table(dev, true); |
Stephan Gerhold | dd461cd | 2020-07-27 11:30:46 +0200 | [diff] [blame] | 2545 | if (IS_ERR(opp_table)) |
| 2546 | return PTR_ERR(opp_table); |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 2547 | |
Viresh Kumar | 46f48ac | 2018-12-11 16:39:36 +0530 | [diff] [blame] | 2548 | /* Fix regulator count for dynamic OPPs */ |
| 2549 | opp_table->regulator_count = 1; |
| 2550 | |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 2551 | ret = _opp_add_v1(opp_table, dev, freq, u_volt, true); |
Viresh Kumar | 0ad8c62 | 2018-08-02 14:23:09 +0530 | [diff] [blame] | 2552 | if (ret) |
| 2553 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 2554 | |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 2555 | return ret; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2556 | } |
| 2557 | EXPORT_SYMBOL_GPL(dev_pm_opp_add); |
| 2558 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2559 | /** |
Nishanth Menon | 327854c | 2014-12-24 11:22:56 -0600 | [diff] [blame] | 2560 | * _opp_set_availability() - helper to set the availability of an opp |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2561 | * @dev: device for which we do this operation |
| 2562 | * @freq: OPP frequency to modify availability |
| 2563 | * @availability_req: availability status requested for this opp |
| 2564 | * |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 2565 | * Set the availability of an OPP, opp_{enable,disable} share a common logic |
| 2566 | * which is isolated here. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2567 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 2568 | * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the |
Stephen Boyd | e1a2d49 | 2015-09-24 12:28:44 -0700 | [diff] [blame] | 2569 | * copy operation, returns 0 if no modification was done OR modification was |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2570 | * successful. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2571 | */ |
Nishanth Menon | 327854c | 2014-12-24 11:22:56 -0600 | [diff] [blame] | 2572 | static int _opp_set_availability(struct device *dev, unsigned long freq, |
| 2573 | bool availability_req) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2574 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 2575 | struct opp_table *opp_table; |
Viresh Kumar | a7f3987 | 2017-01-23 10:11:50 +0530 | [diff] [blame] | 2576 | struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2577 | int r = 0; |
| 2578 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 2579 | /* Find the opp_table */ |
| 2580 | opp_table = _find_opp_table(dev); |
| 2581 | if (IS_ERR(opp_table)) { |
| 2582 | r = PTR_ERR(opp_table); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2583 | dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r); |
Viresh Kumar | a7f3987 | 2017-01-23 10:11:50 +0530 | [diff] [blame] | 2584 | return r; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2585 | } |
| 2586 | |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 2587 | mutex_lock(&opp_table->lock); |
| 2588 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2589 | /* Do we have the frequency? */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 2590 | list_for_each_entry(tmp_opp, &opp_table->opp_list, node) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2591 | if (tmp_opp->rate == freq) { |
| 2592 | opp = tmp_opp; |
| 2593 | break; |
| 2594 | } |
| 2595 | } |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 2596 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2597 | if (IS_ERR(opp)) { |
| 2598 | r = PTR_ERR(opp); |
| 2599 | goto unlock; |
| 2600 | } |
| 2601 | |
| 2602 | /* Is update really needed? */ |
| 2603 | if (opp->available == availability_req) |
| 2604 | goto unlock; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2605 | |
Viresh Kumar | a7f3987 | 2017-01-23 10:11:50 +0530 | [diff] [blame] | 2606 | opp->available = availability_req; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2607 | |
Viresh Kumar | e4d8ae0 | 2017-09-21 10:44:36 -0700 | [diff] [blame] | 2608 | dev_pm_opp_get(opp); |
| 2609 | mutex_unlock(&opp_table->lock); |
| 2610 | |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 2611 | /* Notify the change of the OPP availability */ |
| 2612 | if (availability_req) |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 2613 | blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ENABLE, |
Viresh Kumar | a7f3987 | 2017-01-23 10:11:50 +0530 | [diff] [blame] | 2614 | opp); |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 2615 | else |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 2616 | blocking_notifier_call_chain(&opp_table->head, |
Viresh Kumar | a7f3987 | 2017-01-23 10:11:50 +0530 | [diff] [blame] | 2617 | OPP_EVENT_DISABLE, opp); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2618 | |
Viresh Kumar | e4d8ae0 | 2017-09-21 10:44:36 -0700 | [diff] [blame] | 2619 | dev_pm_opp_put(opp); |
| 2620 | goto put_table; |
| 2621 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2622 | unlock: |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 2623 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | e4d8ae0 | 2017-09-21 10:44:36 -0700 | [diff] [blame] | 2624 | put_table: |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 2625 | dev_pm_opp_put_opp_table(opp_table); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2626 | return r; |
| 2627 | } |
| 2628 | |
| 2629 | /** |
Stephen Boyd | 25cb20a | 2019-10-16 16:57:53 +0200 | [diff] [blame] | 2630 | * dev_pm_opp_adjust_voltage() - helper to change the voltage of an OPP |
| 2631 | * @dev: device for which we do this operation |
| 2632 | * @freq: OPP frequency to adjust voltage of |
| 2633 | * @u_volt: new OPP target voltage |
| 2634 | * @u_volt_min: new OPP min voltage |
| 2635 | * @u_volt_max: new OPP max voltage |
| 2636 | * |
| 2637 | * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the |
| 2638 | * copy operation, returns 0 if no modifcation was done OR modification was |
| 2639 | * successful. |
| 2640 | */ |
| 2641 | int dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq, |
| 2642 | unsigned long u_volt, unsigned long u_volt_min, |
| 2643 | unsigned long u_volt_max) |
| 2644 | |
| 2645 | { |
| 2646 | struct opp_table *opp_table; |
| 2647 | struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV); |
| 2648 | int r = 0; |
| 2649 | |
| 2650 | /* Find the opp_table */ |
| 2651 | opp_table = _find_opp_table(dev); |
| 2652 | if (IS_ERR(opp_table)) { |
| 2653 | r = PTR_ERR(opp_table); |
| 2654 | dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r); |
| 2655 | return r; |
| 2656 | } |
| 2657 | |
| 2658 | mutex_lock(&opp_table->lock); |
| 2659 | |
| 2660 | /* Do we have the frequency? */ |
| 2661 | list_for_each_entry(tmp_opp, &opp_table->opp_list, node) { |
| 2662 | if (tmp_opp->rate == freq) { |
| 2663 | opp = tmp_opp; |
| 2664 | break; |
| 2665 | } |
| 2666 | } |
| 2667 | |
| 2668 | if (IS_ERR(opp)) { |
| 2669 | r = PTR_ERR(opp); |
| 2670 | goto adjust_unlock; |
| 2671 | } |
| 2672 | |
| 2673 | /* Is update really needed? */ |
| 2674 | if (opp->supplies->u_volt == u_volt) |
| 2675 | goto adjust_unlock; |
| 2676 | |
| 2677 | opp->supplies->u_volt = u_volt; |
| 2678 | opp->supplies->u_volt_min = u_volt_min; |
| 2679 | opp->supplies->u_volt_max = u_volt_max; |
| 2680 | |
| 2681 | dev_pm_opp_get(opp); |
| 2682 | mutex_unlock(&opp_table->lock); |
| 2683 | |
| 2684 | /* Notify the voltage change of the OPP */ |
| 2685 | blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADJUST_VOLTAGE, |
| 2686 | opp); |
| 2687 | |
| 2688 | dev_pm_opp_put(opp); |
| 2689 | goto adjust_put_table; |
| 2690 | |
| 2691 | adjust_unlock: |
| 2692 | mutex_unlock(&opp_table->lock); |
| 2693 | adjust_put_table: |
| 2694 | dev_pm_opp_put_opp_table(opp_table); |
| 2695 | return r; |
| 2696 | } |
Valdis Klētnieks | 0364915 | 2020-06-20 13:03:22 -0400 | [diff] [blame] | 2697 | EXPORT_SYMBOL_GPL(dev_pm_opp_adjust_voltage); |
Stephen Boyd | 25cb20a | 2019-10-16 16:57:53 +0200 | [diff] [blame] | 2698 | |
| 2699 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 2700 | * dev_pm_opp_enable() - Enable a specific OPP |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2701 | * @dev: device for which we do this operation |
| 2702 | * @freq: OPP frequency to enable |
| 2703 | * |
| 2704 | * Enables a provided opp. If the operation is valid, this returns 0, else the |
| 2705 | * 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] | 2706 | * after being temporarily made unavailable with dev_pm_opp_disable. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2707 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 2708 | * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the |
Stephen Boyd | e1a2d49 | 2015-09-24 12:28:44 -0700 | [diff] [blame] | 2709 | * copy operation, returns 0 if no modification was done OR modification was |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 2710 | * successful. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2711 | */ |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 2712 | int dev_pm_opp_enable(struct device *dev, unsigned long freq) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2713 | { |
Nishanth Menon | 327854c | 2014-12-24 11:22:56 -0600 | [diff] [blame] | 2714 | return _opp_set_availability(dev, freq, true); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2715 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 2716 | EXPORT_SYMBOL_GPL(dev_pm_opp_enable); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2717 | |
| 2718 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 2719 | * dev_pm_opp_disable() - Disable a specific OPP |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2720 | * @dev: device for which we do this operation |
| 2721 | * @freq: OPP frequency to disable |
| 2722 | * |
| 2723 | * Disables a provided opp. If the operation is valid, this returns |
| 2724 | * 0, else the corresponding error value. It is meant to be a temporary |
| 2725 | * 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] | 2726 | * 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] | 2727 | * |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 2728 | * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the |
Stephen Boyd | e1a2d49 | 2015-09-24 12:28:44 -0700 | [diff] [blame] | 2729 | * copy operation, returns 0 if no modification was done OR modification was |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 2730 | * successful. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2731 | */ |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 2732 | int dev_pm_opp_disable(struct device *dev, unsigned long freq) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2733 | { |
Nishanth Menon | 327854c | 2014-12-24 11:22:56 -0600 | [diff] [blame] | 2734 | return _opp_set_availability(dev, freq, false); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2735 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 2736 | EXPORT_SYMBOL_GPL(dev_pm_opp_disable); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 2737 | |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 2738 | /** |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2739 | * dev_pm_opp_register_notifier() - Register OPP notifier for the device |
| 2740 | * @dev: Device for which notifier needs to be registered |
| 2741 | * @nb: Notifier block to be registered |
Nishanth Menon | 984f16c8 | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 2742 | * |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2743 | * Return: 0 on success or a negative error value. |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 2744 | */ |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2745 | 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] | 2746 | { |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2747 | struct opp_table *opp_table; |
| 2748 | int ret; |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 2749 | |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2750 | opp_table = _find_opp_table(dev); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 2751 | if (IS_ERR(opp_table)) |
| 2752 | return PTR_ERR(opp_table); |
| 2753 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 2754 | ret = blocking_notifier_chain_register(&opp_table->head, nb); |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2755 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 2756 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2757 | |
| 2758 | return ret; |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 2759 | } |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2760 | EXPORT_SYMBOL(dev_pm_opp_register_notifier); |
| 2761 | |
| 2762 | /** |
| 2763 | * dev_pm_opp_unregister_notifier() - Unregister OPP notifier for the device |
| 2764 | * @dev: Device for which notifier needs to be unregistered |
| 2765 | * @nb: Notifier block to be unregistered |
| 2766 | * |
| 2767 | * Return: 0 on success or a negative error value. |
| 2768 | */ |
| 2769 | int dev_pm_opp_unregister_notifier(struct device *dev, |
| 2770 | struct notifier_block *nb) |
| 2771 | { |
| 2772 | struct opp_table *opp_table; |
| 2773 | int ret; |
| 2774 | |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2775 | opp_table = _find_opp_table(dev); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 2776 | if (IS_ERR(opp_table)) |
| 2777 | return PTR_ERR(opp_table); |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2778 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 2779 | ret = blocking_notifier_chain_unregister(&opp_table->head, nb); |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2780 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 2781 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 2782 | |
| 2783 | return ret; |
| 2784 | } |
| 2785 | EXPORT_SYMBOL(dev_pm_opp_unregister_notifier); |
Shawn Guo | b496dfb | 2012-09-05 01:09:12 +0200 | [diff] [blame] | 2786 | |
Viresh Kumar | 8aaf626 | 2020-08-20 13:18:23 +0530 | [diff] [blame] | 2787 | /** |
| 2788 | * dev_pm_opp_remove_table() - Free all OPPs associated with the device |
| 2789 | * @dev: device pointer used to lookup OPP table. |
| 2790 | * |
| 2791 | * Free both OPPs created using static entries present in DT and the |
| 2792 | * dynamically added entries. |
| 2793 | */ |
| 2794 | void dev_pm_opp_remove_table(struct device *dev) |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 2795 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 2796 | struct opp_table *opp_table; |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 2797 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 2798 | /* Check for existing table for 'dev' */ |
| 2799 | opp_table = _find_opp_table(dev); |
| 2800 | if (IS_ERR(opp_table)) { |
| 2801 | int error = PTR_ERR(opp_table); |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 2802 | |
| 2803 | if (error != -ENODEV) |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 2804 | WARN(1, "%s: opp_table: %d\n", |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 2805 | IS_ERR_OR_NULL(dev) ? |
| 2806 | "Invalid device" : dev_name(dev), |
| 2807 | error); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 2808 | return; |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 2809 | } |
| 2810 | |
Viresh Kumar | 922ff07 | 2020-08-31 13:03:06 +0530 | [diff] [blame] | 2811 | /* |
| 2812 | * Drop the extra reference only if the OPP table was successfully added |
| 2813 | * with dev_pm_opp_of_add_table() earlier. |
| 2814 | **/ |
| 2815 | if (_opp_remove_all_static(opp_table)) |
| 2816 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 2817 | |
Viresh Kumar | cdd6ed9 | 2018-09-12 12:35:19 +0530 | [diff] [blame] | 2818 | /* Drop reference taken by _find_opp_table() */ |
| 2819 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 2820 | } |
Sudeep Holla | 411466c | 2016-05-03 15:05:04 +0100 | [diff] [blame] | 2821 | EXPORT_SYMBOL_GPL(dev_pm_opp_remove_table); |
Dmitry Osipenko | ce8073d | 2021-01-21 01:26:47 +0300 | [diff] [blame] | 2822 | |
| 2823 | /** |
| 2824 | * dev_pm_opp_sync_regulators() - Sync state of voltage regulators |
| 2825 | * @dev: device for which we do this operation |
| 2826 | * |
| 2827 | * Sync voltage state of the OPP table regulators. |
| 2828 | * |
| 2829 | * Return: 0 on success or a negative error value. |
| 2830 | */ |
| 2831 | int dev_pm_opp_sync_regulators(struct device *dev) |
| 2832 | { |
| 2833 | struct opp_table *opp_table; |
| 2834 | struct regulator *reg; |
| 2835 | int i, ret = 0; |
| 2836 | |
| 2837 | /* Device may not have OPP table */ |
| 2838 | opp_table = _find_opp_table(dev); |
| 2839 | if (IS_ERR(opp_table)) |
| 2840 | return 0; |
| 2841 | |
| 2842 | /* Regulator may not be required for the device */ |
| 2843 | if (unlikely(!opp_table->regulators)) |
| 2844 | goto put_table; |
| 2845 | |
| 2846 | /* Nothing to sync if voltage wasn't changed */ |
| 2847 | if (!opp_table->enabled) |
| 2848 | goto put_table; |
| 2849 | |
| 2850 | for (i = 0; i < opp_table->regulator_count; i++) { |
| 2851 | reg = opp_table->regulators[i]; |
| 2852 | ret = regulator_sync_voltage(reg); |
| 2853 | if (ret) |
| 2854 | break; |
| 2855 | } |
| 2856 | put_table: |
| 2857 | /* Drop reference taken by _find_opp_table() */ |
| 2858 | dev_pm_opp_put_opp_table(opp_table); |
| 2859 | |
| 2860 | return ret; |
| 2861 | } |
| 2862 | EXPORT_SYMBOL_GPL(dev_pm_opp_sync_regulators); |