Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Core driver access RC5T583 power management chip. |
| 3 | * |
| 4 | * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved. |
| 5 | * Author: Laxman dewangan <ldewangan@nvidia.com> |
| 6 | * |
| 7 | * Based on code |
| 8 | * Copyright (C) 2011 RICOH COMPANY,LTD |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms and conditions of the GNU General Public License, |
| 12 | * version 2, as published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 15 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 17 | * more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 21 | * |
| 22 | */ |
| 23 | #include <linux/interrupt.h> |
| 24 | #include <linux/irq.h> |
| 25 | #include <linux/kernel.h> |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 26 | #include <linux/init.h> |
| 27 | #include <linux/err.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/i2c.h> |
| 30 | #include <linux/mfd/core.h> |
| 31 | #include <linux/mfd/rc5t583.h> |
| 32 | #include <linux/regmap.h> |
| 33 | |
| 34 | #define RICOH_ONOFFSEL_REG 0x10 |
| 35 | #define RICOH_SWCTL_REG 0x5E |
| 36 | |
| 37 | struct deepsleep_control_data { |
| 38 | u8 reg_add; |
| 39 | u8 ds_pos_bit; |
| 40 | }; |
| 41 | |
| 42 | #define DEEPSLEEP_INIT(_id, _reg, _pos) \ |
| 43 | { \ |
| 44 | .reg_add = RC5T583_##_reg, \ |
| 45 | .ds_pos_bit = _pos, \ |
| 46 | } |
| 47 | |
| 48 | static struct deepsleep_control_data deepsleep_data[] = { |
| 49 | DEEPSLEEP_INIT(DC0, SLPSEQ1, 0), |
| 50 | DEEPSLEEP_INIT(DC1, SLPSEQ1, 4), |
| 51 | DEEPSLEEP_INIT(DC2, SLPSEQ2, 0), |
| 52 | DEEPSLEEP_INIT(DC3, SLPSEQ2, 4), |
| 53 | DEEPSLEEP_INIT(LDO0, SLPSEQ3, 0), |
| 54 | DEEPSLEEP_INIT(LDO1, SLPSEQ3, 4), |
| 55 | DEEPSLEEP_INIT(LDO2, SLPSEQ4, 0), |
| 56 | DEEPSLEEP_INIT(LDO3, SLPSEQ4, 4), |
| 57 | DEEPSLEEP_INIT(LDO4, SLPSEQ5, 0), |
| 58 | DEEPSLEEP_INIT(LDO5, SLPSEQ5, 4), |
| 59 | DEEPSLEEP_INIT(LDO6, SLPSEQ6, 0), |
| 60 | DEEPSLEEP_INIT(LDO7, SLPSEQ6, 4), |
| 61 | DEEPSLEEP_INIT(LDO8, SLPSEQ7, 0), |
| 62 | DEEPSLEEP_INIT(LDO9, SLPSEQ7, 4), |
| 63 | DEEPSLEEP_INIT(PSO0, SLPSEQ8, 0), |
| 64 | DEEPSLEEP_INIT(PSO1, SLPSEQ8, 4), |
| 65 | DEEPSLEEP_INIT(PSO2, SLPSEQ9, 0), |
| 66 | DEEPSLEEP_INIT(PSO3, SLPSEQ9, 4), |
| 67 | DEEPSLEEP_INIT(PSO4, SLPSEQ10, 0), |
| 68 | DEEPSLEEP_INIT(PSO5, SLPSEQ10, 4), |
| 69 | DEEPSLEEP_INIT(PSO6, SLPSEQ11, 0), |
| 70 | DEEPSLEEP_INIT(PSO7, SLPSEQ11, 4), |
| 71 | }; |
| 72 | |
| 73 | #define EXT_PWR_REQ \ |
| 74 | (RC5T583_EXT_PWRREQ1_CONTROL | RC5T583_EXT_PWRREQ2_CONTROL) |
| 75 | |
Geert Uytterhoeven | 5ac9855 | 2013-11-18 14:33:06 +0100 | [diff] [blame] | 76 | static const struct mfd_cell rc5t583_subdevs[] = { |
Laxman Dewangan | e1277f4 | 2012-04-09 13:55:55 +0530 | [diff] [blame] | 77 | {.name = "rc5t583-gpio",}, |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 78 | {.name = "rc5t583-regulator",}, |
| 79 | {.name = "rc5t583-rtc", }, |
| 80 | {.name = "rc5t583-key", } |
| 81 | }; |
| 82 | |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 83 | static int __rc5t583_set_ext_pwrreq1_control(struct device *dev, |
| 84 | int id, int ext_pwr, int slots) |
| 85 | { |
| 86 | int ret; |
Venu Byravarasu | 0dd96360 | 2012-08-23 12:21:16 +0530 | [diff] [blame] | 87 | uint8_t sleepseq_val = 0; |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 88 | unsigned int en_bit; |
| 89 | unsigned int slot_bit; |
| 90 | |
| 91 | if (id == RC5T583_DS_DC0) { |
| 92 | dev_err(dev, "PWRREQ1 is invalid control for rail %d\n", id); |
| 93 | return -EINVAL; |
| 94 | } |
| 95 | |
| 96 | en_bit = deepsleep_data[id].ds_pos_bit; |
| 97 | slot_bit = en_bit + 1; |
| 98 | ret = rc5t583_read(dev, deepsleep_data[id].reg_add, &sleepseq_val); |
| 99 | if (ret < 0) { |
| 100 | dev_err(dev, "Error in reading reg 0x%x\n", |
| 101 | deepsleep_data[id].reg_add); |
| 102 | return ret; |
| 103 | } |
| 104 | |
| 105 | sleepseq_val &= ~(0xF << en_bit); |
| 106 | sleepseq_val |= BIT(en_bit); |
| 107 | sleepseq_val |= ((slots & 0x7) << slot_bit); |
| 108 | ret = rc5t583_set_bits(dev, RICOH_ONOFFSEL_REG, BIT(1)); |
| 109 | if (ret < 0) { |
| 110 | dev_err(dev, "Error in updating the 0x%02x register\n", |
| 111 | RICOH_ONOFFSEL_REG); |
| 112 | return ret; |
| 113 | } |
| 114 | |
| 115 | ret = rc5t583_write(dev, deepsleep_data[id].reg_add, sleepseq_val); |
| 116 | if (ret < 0) { |
| 117 | dev_err(dev, "Error in writing reg 0x%x\n", |
| 118 | deepsleep_data[id].reg_add); |
| 119 | return ret; |
| 120 | } |
| 121 | |
| 122 | if (id == RC5T583_DS_LDO4) { |
| 123 | ret = rc5t583_write(dev, RICOH_SWCTL_REG, 0x1); |
| 124 | if (ret < 0) |
| 125 | dev_err(dev, "Error in writing reg 0x%x\n", |
| 126 | RICOH_SWCTL_REG); |
| 127 | } |
| 128 | return ret; |
| 129 | } |
| 130 | |
| 131 | static int __rc5t583_set_ext_pwrreq2_control(struct device *dev, |
| 132 | int id, int ext_pwr) |
| 133 | { |
| 134 | int ret; |
| 135 | |
| 136 | if (id != RC5T583_DS_DC0) { |
| 137 | dev_err(dev, "PWRREQ2 is invalid control for rail %d\n", id); |
| 138 | return -EINVAL; |
| 139 | } |
| 140 | |
| 141 | ret = rc5t583_set_bits(dev, RICOH_ONOFFSEL_REG, BIT(2)); |
| 142 | if (ret < 0) |
| 143 | dev_err(dev, "Error in updating the ONOFFSEL 0x10 register\n"); |
| 144 | return ret; |
| 145 | } |
| 146 | |
| 147 | int rc5t583_ext_power_req_config(struct device *dev, int ds_id, |
| 148 | int ext_pwr_req, int deepsleep_slot_nr) |
| 149 | { |
| 150 | if ((ext_pwr_req & EXT_PWR_REQ) == EXT_PWR_REQ) |
| 151 | return -EINVAL; |
| 152 | |
| 153 | if (ext_pwr_req & RC5T583_EXT_PWRREQ1_CONTROL) |
| 154 | return __rc5t583_set_ext_pwrreq1_control(dev, ds_id, |
| 155 | ext_pwr_req, deepsleep_slot_nr); |
| 156 | |
| 157 | if (ext_pwr_req & RC5T583_EXT_PWRREQ2_CONTROL) |
| 158 | return __rc5t583_set_ext_pwrreq2_control(dev, |
| 159 | ds_id, ext_pwr_req); |
| 160 | return 0; |
| 161 | } |
Paul Gortmaker | 82ea267 | 2012-04-16 21:24:32 +0200 | [diff] [blame] | 162 | EXPORT_SYMBOL(rc5t583_ext_power_req_config); |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 163 | |
| 164 | static int rc5t583_clear_ext_power_req(struct rc5t583 *rc5t583, |
| 165 | struct rc5t583_platform_data *pdata) |
| 166 | { |
| 167 | int ret; |
| 168 | int i; |
| 169 | uint8_t on_off_val = 0; |
| 170 | |
| 171 | /* Clear ONOFFSEL register */ |
| 172 | if (pdata->enable_shutdown) |
| 173 | on_off_val = 0x1; |
| 174 | |
| 175 | ret = rc5t583_write(rc5t583->dev, RICOH_ONOFFSEL_REG, on_off_val); |
| 176 | if (ret < 0) |
| 177 | dev_warn(rc5t583->dev, "Error in writing reg %d error: %d\n", |
| 178 | RICOH_ONOFFSEL_REG, ret); |
| 179 | |
| 180 | ret = rc5t583_write(rc5t583->dev, RICOH_SWCTL_REG, 0x0); |
| 181 | if (ret < 0) |
| 182 | dev_warn(rc5t583->dev, "Error in writing reg %d error: %d\n", |
| 183 | RICOH_SWCTL_REG, ret); |
| 184 | |
| 185 | /* Clear sleep sequence register */ |
| 186 | for (i = RC5T583_SLPSEQ1; i <= RC5T583_SLPSEQ11; ++i) { |
| 187 | ret = rc5t583_write(rc5t583->dev, i, 0x0); |
| 188 | if (ret < 0) |
| 189 | dev_warn(rc5t583->dev, |
| 190 | "Error in writing reg 0x%02x error: %d\n", |
| 191 | i, ret); |
| 192 | } |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | static bool volatile_reg(struct device *dev, unsigned int reg) |
| 197 | { |
| 198 | /* Enable caching in interrupt registers */ |
| 199 | switch (reg) { |
| 200 | case RC5T583_INT_EN_SYS1: |
| 201 | case RC5T583_INT_EN_SYS2: |
| 202 | case RC5T583_INT_EN_DCDC: |
| 203 | case RC5T583_INT_EN_RTC: |
| 204 | case RC5T583_INT_EN_ADC1: |
| 205 | case RC5T583_INT_EN_ADC2: |
| 206 | case RC5T583_INT_EN_ADC3: |
| 207 | case RC5T583_GPIO_GPEDGE1: |
| 208 | case RC5T583_GPIO_GPEDGE2: |
| 209 | case RC5T583_GPIO_EN_INT: |
| 210 | return false; |
| 211 | |
| 212 | case RC5T583_GPIO_MON_IOIN: |
| 213 | /* This is gpio input register */ |
| 214 | return true; |
| 215 | |
| 216 | default: |
| 217 | /* Enable caching in gpio registers */ |
| 218 | if ((reg >= RC5T583_GPIO_IOSEL) && |
| 219 | (reg <= RC5T583_GPIO_GPOFUNC)) |
| 220 | return false; |
| 221 | |
| 222 | /* Enable caching in sleep seq registers */ |
| 223 | if ((reg >= RC5T583_SLPSEQ1) && (reg <= RC5T583_SLPSEQ11)) |
| 224 | return false; |
| 225 | |
| 226 | /* Enable caching of regulator registers */ |
| 227 | if ((reg >= RC5T583_REG_DC0CTL) && (reg <= RC5T583_REG_SR3CTL)) |
| 228 | return false; |
| 229 | if ((reg >= RC5T583_REG_LDOEN1) && |
| 230 | (reg <= RC5T583_REG_LDO9DAC_DS)) |
| 231 | return false; |
| 232 | |
| 233 | break; |
| 234 | } |
| 235 | |
| 236 | return true; |
| 237 | } |
| 238 | |
| 239 | static const struct regmap_config rc5t583_regmap_config = { |
| 240 | .reg_bits = 8, |
| 241 | .val_bits = 8, |
| 242 | .volatile_reg = volatile_reg, |
Maciej S. Szmigiero | a862dc3e | 2016-01-31 22:58:41 +0100 | [diff] [blame] | 243 | .max_register = RC5T583_MAX_REG, |
| 244 | .num_reg_defaults_raw = RC5T583_NUM_REGS, |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 245 | .cache_type = REGCACHE_RBTREE, |
| 246 | }; |
| 247 | |
Bill Pemberton | f791be4 | 2012-11-19 13:23:04 -0500 | [diff] [blame] | 248 | static int rc5t583_i2c_probe(struct i2c_client *i2c, |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 249 | const struct i2c_device_id *id) |
| 250 | { |
| 251 | struct rc5t583 *rc5t583; |
Jingoo Han | 334a41ce | 2013-07-30 17:10:05 +0900 | [diff] [blame] | 252 | struct rc5t583_platform_data *pdata = dev_get_platdata(&i2c->dev); |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 253 | int ret; |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 254 | |
| 255 | if (!pdata) { |
| 256 | dev_err(&i2c->dev, "Err: Platform data not found\n"); |
| 257 | return -EINVAL; |
| 258 | } |
| 259 | |
Markus Elfring | d001117 | 2018-01-15 14:50:25 +0100 | [diff] [blame] | 260 | rc5t583 = devm_kzalloc(&i2c->dev, sizeof(*rc5t583), GFP_KERNEL); |
Markus Elfring | 6733f64 | 2018-01-15 14:48:57 +0100 | [diff] [blame] | 261 | if (!rc5t583) |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 262 | return -ENOMEM; |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 263 | |
| 264 | rc5t583->dev = &i2c->dev; |
| 265 | i2c_set_clientdata(i2c, rc5t583); |
| 266 | |
Axel Lin | f8dddc0 | 2012-04-25 10:01:55 +0800 | [diff] [blame] | 267 | rc5t583->regmap = devm_regmap_init_i2c(i2c, &rc5t583_regmap_config); |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 268 | if (IS_ERR(rc5t583->regmap)) { |
| 269 | ret = PTR_ERR(rc5t583->regmap); |
| 270 | dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret); |
| 271 | return ret; |
| 272 | } |
| 273 | |
| 274 | ret = rc5t583_clear_ext_power_req(rc5t583, pdata); |
| 275 | if (ret < 0) |
Axel Lin | f8dddc0 | 2012-04-25 10:01:55 +0800 | [diff] [blame] | 276 | return ret; |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 277 | |
| 278 | if (i2c->irq) { |
| 279 | ret = rc5t583_irq_init(rc5t583, i2c->irq, pdata->irq_base); |
Masanari Iida | 5a4432b | 2012-08-13 21:00:25 +0900 | [diff] [blame] | 280 | /* Still continue with warning, if irq init fails */ |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 281 | if (ret) |
| 282 | dev_warn(&i2c->dev, "IRQ init failed: %d\n", ret); |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 283 | } |
| 284 | |
Laxman Dewangan | b36c827 | 2016-04-21 17:55:55 +0530 | [diff] [blame] | 285 | ret = devm_mfd_add_devices(rc5t583->dev, -1, rc5t583_subdevs, |
| 286 | ARRAY_SIZE(rc5t583_subdevs), NULL, 0, NULL); |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 287 | if (ret) { |
| 288 | dev_err(&i2c->dev, "add mfd devices failed: %d\n", ret); |
Laxman Dewangan | b36c827 | 2016-04-21 17:55:55 +0530 | [diff] [blame] | 289 | return ret; |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 290 | } |
| 291 | |
| 292 | return 0; |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 293 | } |
| 294 | |
| 295 | static const struct i2c_device_id rc5t583_i2c_id[] = { |
| 296 | {.name = "rc5t583", .driver_data = 0}, |
| 297 | {} |
| 298 | }; |
| 299 | |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 300 | static struct i2c_driver rc5t583_i2c_driver = { |
| 301 | .driver = { |
| 302 | .name = "rc5t583", |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 303 | }, |
| 304 | .probe = rc5t583_i2c_probe, |
Laxman Dewangan | 1b1247d | 2012-02-28 18:35:17 +0530 | [diff] [blame] | 305 | .id_table = rc5t583_i2c_id, |
| 306 | }; |
| 307 | |
| 308 | static int __init rc5t583_i2c_init(void) |
| 309 | { |
| 310 | return i2c_add_driver(&rc5t583_i2c_driver); |
| 311 | } |
| 312 | subsys_initcall(rc5t583_i2c_init); |