Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2012 Texas Instruments |
| 3 | * |
| 4 | * Author: Milo(Woogyom) Kim <milo.kim@ti.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | */ |
| 11 | |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/slab.h> |
| 14 | #include <linux/i2c.h> |
| 15 | #include <linux/regmap.h> |
| 16 | #include <linux/err.h> |
| 17 | #include <linux/gpio.h> |
| 18 | #include <linux/regulator/lp872x.h> |
| 19 | #include <linux/regulator/driver.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | |
| 22 | /* Registers : LP8720/8725 shared */ |
| 23 | #define LP872X_GENERAL_CFG 0x00 |
| 24 | #define LP872X_LDO1_VOUT 0x01 |
| 25 | #define LP872X_LDO2_VOUT 0x02 |
| 26 | #define LP872X_LDO3_VOUT 0x03 |
| 27 | #define LP872X_LDO4_VOUT 0x04 |
| 28 | #define LP872X_LDO5_VOUT 0x05 |
| 29 | |
| 30 | /* Registers : LP8720 */ |
| 31 | #define LP8720_BUCK_VOUT1 0x06 |
| 32 | #define LP8720_BUCK_VOUT2 0x07 |
| 33 | #define LP8720_ENABLE 0x08 |
| 34 | |
| 35 | /* Registers : LP8725 */ |
| 36 | #define LP8725_LILO1_VOUT 0x06 |
| 37 | #define LP8725_LILO2_VOUT 0x07 |
| 38 | #define LP8725_BUCK1_VOUT1 0x08 |
| 39 | #define LP8725_BUCK1_VOUT2 0x09 |
| 40 | #define LP8725_BUCK2_VOUT1 0x0A |
| 41 | #define LP8725_BUCK2_VOUT2 0x0B |
| 42 | #define LP8725_BUCK_CTRL 0x0C |
| 43 | #define LP8725_LDO_CTRL 0x0D |
| 44 | |
| 45 | /* Mask/shift : LP8720/LP8725 shared */ |
| 46 | #define LP872X_VOUT_M 0x1F |
| 47 | #define LP872X_START_DELAY_M 0xE0 |
| 48 | #define LP872X_START_DELAY_S 5 |
| 49 | #define LP872X_EN_LDO1_M BIT(0) |
| 50 | #define LP872X_EN_LDO2_M BIT(1) |
| 51 | #define LP872X_EN_LDO3_M BIT(2) |
| 52 | #define LP872X_EN_LDO4_M BIT(3) |
| 53 | #define LP872X_EN_LDO5_M BIT(4) |
| 54 | |
| 55 | /* Mask/shift : LP8720 */ |
| 56 | #define LP8720_TIMESTEP_S 0 /* Addr 00h */ |
| 57 | #define LP8720_TIMESTEP_M BIT(0) |
| 58 | #define LP8720_EXT_DVS_M BIT(2) |
| 59 | #define LP8720_BUCK_FPWM_S 5 /* Addr 07h */ |
| 60 | #define LP8720_BUCK_FPWM_M BIT(5) |
| 61 | #define LP8720_EN_BUCK_M BIT(5) /* Addr 08h */ |
| 62 | #define LP8720_DVS_SEL_M BIT(7) |
| 63 | |
| 64 | /* Mask/shift : LP8725 */ |
| 65 | #define LP8725_TIMESTEP_M 0xC0 /* Addr 00h */ |
| 66 | #define LP8725_TIMESTEP_S 6 |
| 67 | #define LP8725_BUCK1_EN_M BIT(0) |
| 68 | #define LP8725_DVS1_M BIT(2) |
| 69 | #define LP8725_DVS2_M BIT(3) |
| 70 | #define LP8725_BUCK2_EN_M BIT(4) |
| 71 | #define LP8725_BUCK_CL_M 0xC0 /* Addr 09h, 0Bh */ |
| 72 | #define LP8725_BUCK_CL_S 6 |
| 73 | #define LP8725_BUCK1_FPWM_S 1 /* Addr 0Ch */ |
| 74 | #define LP8725_BUCK1_FPWM_M BIT(1) |
| 75 | #define LP8725_BUCK2_FPWM_S 5 |
| 76 | #define LP8725_BUCK2_FPWM_M BIT(5) |
| 77 | #define LP8725_EN_LILO1_M BIT(5) /* Addr 0Dh */ |
| 78 | #define LP8725_EN_LILO2_M BIT(6) |
| 79 | |
| 80 | /* PWM mode */ |
| 81 | #define LP872X_FORCE_PWM 1 |
| 82 | #define LP872X_AUTO_PWM 0 |
| 83 | |
| 84 | #define LP8720_NUM_REGULATORS 6 |
| 85 | #define LP8725_NUM_REGULATORS 9 |
| 86 | #define EXTERN_DVS_USED 0 |
| 87 | #define MAX_DELAY 6 |
| 88 | |
Kim, Milo | b158fba | 2012-09-05 04:39:16 +0000 | [diff] [blame] | 89 | /* Default DVS Mode */ |
| 90 | #define LP8720_DEFAULT_DVS 0 |
| 91 | #define LP8725_DEFAULT_DVS BIT(2) |
| 92 | |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 93 | /* dump registers in regmap-debugfs */ |
| 94 | #define MAX_REGISTERS 0x0F |
| 95 | |
| 96 | enum lp872x_id { |
| 97 | LP8720, |
| 98 | LP8725, |
| 99 | }; |
| 100 | |
| 101 | struct lp872x { |
| 102 | struct regmap *regmap; |
| 103 | struct device *dev; |
| 104 | enum lp872x_id chipid; |
| 105 | struct lp872x_platform_data *pdata; |
| 106 | struct regulator_dev **regulators; |
| 107 | int num_regulators; |
| 108 | enum lp872x_dvs_state dvs_pin; |
| 109 | int dvs_gpio; |
| 110 | }; |
| 111 | |
| 112 | /* LP8720/LP8725 shared voltage table for LDOs */ |
| 113 | static const unsigned int lp872x_ldo_vtbl[] = { |
| 114 | 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000, |
| 115 | 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 2000000, |
| 116 | 2100000, 2200000, 2300000, 2400000, 2500000, 2600000, 2650000, 2700000, |
| 117 | 2750000, 2800000, 2850000, 2900000, 2950000, 3000000, 3100000, 3300000, |
| 118 | }; |
| 119 | |
| 120 | /* LP8720 LDO4 voltage table */ |
| 121 | static const unsigned int lp8720_ldo4_vtbl[] = { |
| 122 | 800000, 850000, 900000, 1000000, 1100000, 1200000, 1250000, 1300000, |
| 123 | 1350000, 1400000, 1450000, 1500000, 1550000, 1600000, 1650000, 1700000, |
| 124 | 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000, |
| 125 | 2400000, 2500000, 2600000, 2650000, 2700000, 2750000, 2800000, 2850000, |
| 126 | }; |
| 127 | |
| 128 | /* LP8725 LILO(Low Input Low Output) voltage table */ |
| 129 | static const unsigned int lp8725_lilo_vtbl[] = { |
| 130 | 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, |
| 131 | 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000, |
| 132 | 1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000, |
| 133 | 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000, |
| 134 | }; |
| 135 | |
| 136 | /* LP8720 BUCK voltage table */ |
| 137 | #define EXT_R 0 /* external resistor divider */ |
| 138 | static const unsigned int lp8720_buck_vtbl[] = { |
| 139 | EXT_R, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, |
| 140 | 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, |
| 141 | 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, |
| 142 | 1950000, 2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, |
| 143 | }; |
| 144 | |
| 145 | /* LP8725 BUCK voltage table */ |
| 146 | static const unsigned int lp8725_buck_vtbl[] = { |
| 147 | 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, |
| 148 | 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000, |
| 149 | 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000, |
| 150 | 2400000, 2500000, 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, |
| 151 | }; |
| 152 | |
| 153 | /* LP8725 BUCK current limit */ |
| 154 | static const unsigned int lp8725_buck_uA[] = { |
| 155 | 460000, 780000, 1050000, 1370000, |
| 156 | }; |
| 157 | |
| 158 | static int lp872x_read_byte(struct lp872x *lp, u8 addr, u8 *data) |
| 159 | { |
| 160 | int ret; |
| 161 | unsigned int val; |
| 162 | |
| 163 | ret = regmap_read(lp->regmap, addr, &val); |
| 164 | if (ret < 0) { |
| 165 | dev_err(lp->dev, "failed to read 0x%.2x\n", addr); |
| 166 | return ret; |
| 167 | } |
| 168 | |
| 169 | *data = (u8)val; |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | static inline int lp872x_write_byte(struct lp872x *lp, u8 addr, u8 data) |
| 174 | { |
| 175 | return regmap_write(lp->regmap, addr, data); |
| 176 | } |
| 177 | |
| 178 | static inline int lp872x_update_bits(struct lp872x *lp, u8 addr, |
| 179 | unsigned int mask, u8 data) |
| 180 | { |
| 181 | return regmap_update_bits(lp->regmap, addr, mask, data); |
| 182 | } |
| 183 | |
| 184 | static int _rdev_to_offset(struct regulator_dev *rdev) |
| 185 | { |
| 186 | enum lp872x_regulator_id id = rdev_get_id(rdev); |
| 187 | |
| 188 | switch (id) { |
| 189 | case LP8720_ID_LDO1 ... LP8720_ID_BUCK: |
| 190 | return id; |
| 191 | case LP8725_ID_LDO1 ... LP8725_ID_BUCK2: |
| 192 | return id - LP8725_ID_BASE; |
| 193 | default: |
| 194 | return -EINVAL; |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | static int lp872x_get_timestep_usec(struct lp872x *lp) |
| 199 | { |
| 200 | enum lp872x_id chip = lp->chipid; |
| 201 | u8 val, mask, shift; |
| 202 | int *time_usec, size, ret; |
| 203 | int lp8720_time_usec[] = { 25, 50 }; |
| 204 | int lp8725_time_usec[] = { 32, 64, 128, 256 }; |
| 205 | |
| 206 | switch (chip) { |
| 207 | case LP8720: |
| 208 | mask = LP8720_TIMESTEP_M; |
| 209 | shift = LP8720_TIMESTEP_S; |
| 210 | time_usec = &lp8720_time_usec[0]; |
| 211 | size = ARRAY_SIZE(lp8720_time_usec); |
| 212 | break; |
| 213 | case LP8725: |
| 214 | mask = LP8725_TIMESTEP_M; |
| 215 | shift = LP8725_TIMESTEP_S; |
| 216 | time_usec = &lp8725_time_usec[0]; |
| 217 | size = ARRAY_SIZE(lp8725_time_usec); |
| 218 | break; |
| 219 | default: |
| 220 | return -EINVAL; |
| 221 | } |
| 222 | |
| 223 | ret = lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val); |
| 224 | if (ret) |
| 225 | return -EINVAL; |
| 226 | |
| 227 | val = (val & mask) >> shift; |
| 228 | if (val >= size) |
| 229 | return -EINVAL; |
| 230 | |
| 231 | return *(time_usec + val); |
| 232 | } |
| 233 | |
| 234 | static int lp872x_regulator_enable_time(struct regulator_dev *rdev) |
| 235 | { |
| 236 | struct lp872x *lp = rdev_get_drvdata(rdev); |
| 237 | enum lp872x_regulator_id regulator = rdev_get_id(rdev); |
| 238 | int time_step_us = lp872x_get_timestep_usec(lp); |
| 239 | int ret, offset; |
| 240 | u8 addr, val; |
| 241 | |
| 242 | if (time_step_us < 0) |
| 243 | return -EINVAL; |
| 244 | |
| 245 | switch (regulator) { |
| 246 | case LP8720_ID_LDO1 ... LP8720_ID_LDO5: |
| 247 | case LP8725_ID_LDO1 ... LP8725_ID_LILO2: |
| 248 | offset = _rdev_to_offset(rdev); |
| 249 | if (offset < 0) |
| 250 | return -EINVAL; |
| 251 | |
| 252 | addr = LP872X_LDO1_VOUT + offset; |
| 253 | break; |
| 254 | case LP8720_ID_BUCK: |
| 255 | addr = LP8720_BUCK_VOUT1; |
| 256 | break; |
| 257 | case LP8725_ID_BUCK1: |
| 258 | addr = LP8725_BUCK1_VOUT1; |
| 259 | break; |
| 260 | case LP8725_ID_BUCK2: |
| 261 | addr = LP8725_BUCK2_VOUT1; |
| 262 | break; |
| 263 | default: |
| 264 | return -EINVAL; |
| 265 | } |
| 266 | |
| 267 | ret = lp872x_read_byte(lp, addr, &val); |
| 268 | if (ret) |
| 269 | return ret; |
| 270 | |
| 271 | val = (val & LP872X_START_DELAY_M) >> LP872X_START_DELAY_S; |
| 272 | |
| 273 | return val > MAX_DELAY ? 0 : val * time_step_us; |
| 274 | } |
| 275 | |
Kim, Milo | 9d6da6f | 2012-09-05 04:39:33 +0000 | [diff] [blame] | 276 | static void lp872x_set_dvs(struct lp872x *lp, enum lp872x_dvs_sel dvs_sel, |
| 277 | int gpio) |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 278 | { |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 279 | enum lp872x_dvs_state state; |
| 280 | |
| 281 | state = dvs_sel == SEL_V1 ? DVS_HIGH : DVS_LOW; |
| 282 | gpio_set_value(gpio, state); |
| 283 | lp->dvs_pin = state; |
| 284 | } |
| 285 | |
| 286 | static u8 lp872x_select_buck_vout_addr(struct lp872x *lp, |
| 287 | enum lp872x_regulator_id buck) |
| 288 | { |
| 289 | u8 val, addr; |
| 290 | |
| 291 | if (lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val)) |
| 292 | return 0; |
| 293 | |
| 294 | switch (buck) { |
| 295 | case LP8720_ID_BUCK: |
| 296 | if (val & LP8720_EXT_DVS_M) { |
| 297 | addr = (lp->dvs_pin == DVS_HIGH) ? |
| 298 | LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2; |
| 299 | } else { |
| 300 | if (lp872x_read_byte(lp, LP8720_ENABLE, &val)) |
| 301 | return 0; |
| 302 | |
| 303 | addr = val & LP8720_DVS_SEL_M ? |
| 304 | LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2; |
| 305 | } |
| 306 | break; |
| 307 | case LP8725_ID_BUCK1: |
| 308 | if (val & LP8725_DVS1_M) |
| 309 | addr = LP8725_BUCK1_VOUT1; |
| 310 | else |
| 311 | addr = (lp->dvs_pin == DVS_HIGH) ? |
| 312 | LP8725_BUCK1_VOUT1 : LP8725_BUCK1_VOUT2; |
| 313 | break; |
| 314 | case LP8725_ID_BUCK2: |
| 315 | addr = val & LP8725_DVS2_M ? |
| 316 | LP8725_BUCK2_VOUT1 : LP8725_BUCK2_VOUT2; |
| 317 | break; |
| 318 | default: |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | return addr; |
| 323 | } |
| 324 | |
| 325 | static bool lp872x_is_valid_buck_addr(u8 addr) |
| 326 | { |
| 327 | switch (addr) { |
| 328 | case LP8720_BUCK_VOUT1: |
| 329 | case LP8720_BUCK_VOUT2: |
| 330 | case LP8725_BUCK1_VOUT1: |
| 331 | case LP8725_BUCK1_VOUT2: |
| 332 | case LP8725_BUCK2_VOUT1: |
| 333 | case LP8725_BUCK2_VOUT2: |
| 334 | return true; |
| 335 | default: |
| 336 | return false; |
| 337 | } |
| 338 | } |
| 339 | |
| 340 | static int lp872x_buck_set_voltage_sel(struct regulator_dev *rdev, |
| 341 | unsigned selector) |
| 342 | { |
| 343 | struct lp872x *lp = rdev_get_drvdata(rdev); |
| 344 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
| 345 | u8 addr, mask = LP872X_VOUT_M; |
Kim, Milo | 9d6da6f | 2012-09-05 04:39:33 +0000 | [diff] [blame] | 346 | struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL; |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 347 | |
| 348 | if (dvs && gpio_is_valid(dvs->gpio)) |
Kim, Milo | 9d6da6f | 2012-09-05 04:39:33 +0000 | [diff] [blame] | 349 | lp872x_set_dvs(lp, dvs->vsel, dvs->gpio); |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 350 | |
| 351 | addr = lp872x_select_buck_vout_addr(lp, buck); |
| 352 | if (!lp872x_is_valid_buck_addr(addr)) |
| 353 | return -EINVAL; |
| 354 | |
| 355 | return lp872x_update_bits(lp, addr, mask, selector); |
| 356 | } |
| 357 | |
| 358 | static int lp872x_buck_get_voltage_sel(struct regulator_dev *rdev) |
| 359 | { |
| 360 | struct lp872x *lp = rdev_get_drvdata(rdev); |
| 361 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
| 362 | u8 addr, val; |
| 363 | int ret; |
| 364 | |
| 365 | addr = lp872x_select_buck_vout_addr(lp, buck); |
| 366 | if (!lp872x_is_valid_buck_addr(addr)) |
| 367 | return -EINVAL; |
| 368 | |
| 369 | ret = lp872x_read_byte(lp, addr, &val); |
| 370 | if (ret) |
| 371 | return ret; |
| 372 | |
| 373 | return val & LP872X_VOUT_M; |
| 374 | } |
| 375 | |
| 376 | static int lp8725_buck_set_current_limit(struct regulator_dev *rdev, |
| 377 | int min_uA, int max_uA) |
| 378 | { |
| 379 | struct lp872x *lp = rdev_get_drvdata(rdev); |
| 380 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
Axel Lin | 4e1d67e | 2012-08-08 20:22:35 +0800 | [diff] [blame] | 381 | int i; |
| 382 | u8 addr; |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 383 | |
| 384 | switch (buck) { |
| 385 | case LP8725_ID_BUCK1: |
| 386 | addr = LP8725_BUCK1_VOUT2; |
| 387 | break; |
| 388 | case LP8725_ID_BUCK2: |
| 389 | addr = LP8725_BUCK2_VOUT2; |
| 390 | break; |
| 391 | default: |
| 392 | return -EINVAL; |
| 393 | } |
| 394 | |
Axel Lin | 4e1d67e | 2012-08-08 20:22:35 +0800 | [diff] [blame] | 395 | for (i = ARRAY_SIZE(lp8725_buck_uA) - 1 ; i >= 0; i--) { |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 396 | if (lp8725_buck_uA[i] >= min_uA && |
| 397 | lp8725_buck_uA[i] <= max_uA) |
Axel Lin | 4e1d67e | 2012-08-08 20:22:35 +0800 | [diff] [blame] | 398 | return lp872x_update_bits(lp, addr, |
| 399 | LP8725_BUCK_CL_M, |
| 400 | i << LP8725_BUCK_CL_S); |
| 401 | } |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 402 | |
Axel Lin | 4e1d67e | 2012-08-08 20:22:35 +0800 | [diff] [blame] | 403 | return -EINVAL; |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 404 | } |
| 405 | |
| 406 | static int lp8725_buck_get_current_limit(struct regulator_dev *rdev) |
| 407 | { |
| 408 | struct lp872x *lp = rdev_get_drvdata(rdev); |
| 409 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
| 410 | u8 addr, val; |
| 411 | int ret; |
| 412 | |
| 413 | switch (buck) { |
| 414 | case LP8725_ID_BUCK1: |
| 415 | addr = LP8725_BUCK1_VOUT2; |
| 416 | break; |
| 417 | case LP8725_ID_BUCK2: |
| 418 | addr = LP8725_BUCK2_VOUT2; |
| 419 | break; |
| 420 | default: |
| 421 | return -EINVAL; |
| 422 | } |
| 423 | |
| 424 | ret = lp872x_read_byte(lp, addr, &val); |
| 425 | if (ret) |
| 426 | return ret; |
| 427 | |
| 428 | val = (val & LP8725_BUCK_CL_M) >> LP8725_BUCK_CL_S; |
| 429 | |
| 430 | return (val < ARRAY_SIZE(lp8725_buck_uA)) ? |
| 431 | lp8725_buck_uA[val] : -EINVAL; |
| 432 | } |
| 433 | |
| 434 | static int lp872x_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) |
| 435 | { |
| 436 | struct lp872x *lp = rdev_get_drvdata(rdev); |
| 437 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
| 438 | u8 addr, mask, shift, val; |
| 439 | |
| 440 | switch (buck) { |
| 441 | case LP8720_ID_BUCK: |
| 442 | addr = LP8720_BUCK_VOUT2; |
| 443 | mask = LP8720_BUCK_FPWM_M; |
| 444 | shift = LP8720_BUCK_FPWM_S; |
| 445 | break; |
| 446 | case LP8725_ID_BUCK1: |
| 447 | addr = LP8725_BUCK_CTRL; |
| 448 | mask = LP8725_BUCK1_FPWM_M; |
| 449 | shift = LP8725_BUCK1_FPWM_S; |
| 450 | break; |
| 451 | case LP8725_ID_BUCK2: |
| 452 | addr = LP8725_BUCK_CTRL; |
| 453 | mask = LP8725_BUCK2_FPWM_M; |
| 454 | shift = LP8725_BUCK2_FPWM_S; |
| 455 | break; |
| 456 | default: |
| 457 | return -EINVAL; |
| 458 | } |
| 459 | |
| 460 | if (mode == REGULATOR_MODE_FAST) |
| 461 | val = LP872X_FORCE_PWM << shift; |
| 462 | else if (mode == REGULATOR_MODE_NORMAL) |
| 463 | val = LP872X_AUTO_PWM << shift; |
| 464 | else |
| 465 | return -EINVAL; |
| 466 | |
| 467 | return lp872x_update_bits(lp, addr, mask, val); |
| 468 | } |
| 469 | |
| 470 | static unsigned int lp872x_buck_get_mode(struct regulator_dev *rdev) |
| 471 | { |
| 472 | struct lp872x *lp = rdev_get_drvdata(rdev); |
| 473 | enum lp872x_regulator_id buck = rdev_get_id(rdev); |
| 474 | u8 addr, mask, val; |
| 475 | int ret; |
| 476 | |
| 477 | switch (buck) { |
| 478 | case LP8720_ID_BUCK: |
| 479 | addr = LP8720_BUCK_VOUT2; |
| 480 | mask = LP8720_BUCK_FPWM_M; |
| 481 | break; |
| 482 | case LP8725_ID_BUCK1: |
| 483 | addr = LP8725_BUCK_CTRL; |
| 484 | mask = LP8725_BUCK1_FPWM_M; |
| 485 | break; |
| 486 | case LP8725_ID_BUCK2: |
| 487 | addr = LP8725_BUCK_CTRL; |
| 488 | mask = LP8725_BUCK2_FPWM_M; |
| 489 | break; |
| 490 | default: |
| 491 | return -EINVAL; |
| 492 | } |
| 493 | |
| 494 | ret = lp872x_read_byte(lp, addr, &val); |
| 495 | if (ret) |
| 496 | return ret; |
| 497 | |
| 498 | return val & mask ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL; |
| 499 | } |
| 500 | |
| 501 | static struct regulator_ops lp872x_ldo_ops = { |
| 502 | .list_voltage = regulator_list_voltage_table, |
| 503 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| 504 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| 505 | .enable = regulator_enable_regmap, |
| 506 | .disable = regulator_disable_regmap, |
| 507 | .is_enabled = regulator_is_enabled_regmap, |
| 508 | .enable_time = lp872x_regulator_enable_time, |
| 509 | }; |
| 510 | |
| 511 | static struct regulator_ops lp8720_buck_ops = { |
| 512 | .list_voltage = regulator_list_voltage_table, |
| 513 | .set_voltage_sel = lp872x_buck_set_voltage_sel, |
| 514 | .get_voltage_sel = lp872x_buck_get_voltage_sel, |
| 515 | .enable = regulator_enable_regmap, |
| 516 | .disable = regulator_disable_regmap, |
| 517 | .is_enabled = regulator_is_enabled_regmap, |
| 518 | .enable_time = lp872x_regulator_enable_time, |
| 519 | .set_mode = lp872x_buck_set_mode, |
| 520 | .get_mode = lp872x_buck_get_mode, |
| 521 | }; |
| 522 | |
| 523 | static struct regulator_ops lp8725_buck_ops = { |
| 524 | .list_voltage = regulator_list_voltage_table, |
| 525 | .set_voltage_sel = lp872x_buck_set_voltage_sel, |
| 526 | .get_voltage_sel = lp872x_buck_get_voltage_sel, |
| 527 | .enable = regulator_enable_regmap, |
| 528 | .disable = regulator_disable_regmap, |
| 529 | .is_enabled = regulator_is_enabled_regmap, |
| 530 | .enable_time = lp872x_regulator_enable_time, |
| 531 | .set_mode = lp872x_buck_set_mode, |
| 532 | .get_mode = lp872x_buck_get_mode, |
| 533 | .set_current_limit = lp8725_buck_set_current_limit, |
| 534 | .get_current_limit = lp8725_buck_get_current_limit, |
| 535 | }; |
| 536 | |
| 537 | static struct regulator_desc lp8720_regulator_desc[] = { |
| 538 | { |
| 539 | .name = "ldo1", |
| 540 | .id = LP8720_ID_LDO1, |
| 541 | .ops = &lp872x_ldo_ops, |
| 542 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| 543 | .volt_table = lp872x_ldo_vtbl, |
| 544 | .type = REGULATOR_VOLTAGE, |
| 545 | .owner = THIS_MODULE, |
| 546 | .vsel_reg = LP872X_LDO1_VOUT, |
| 547 | .vsel_mask = LP872X_VOUT_M, |
| 548 | .enable_reg = LP8720_ENABLE, |
| 549 | .enable_mask = LP872X_EN_LDO1_M, |
| 550 | }, |
| 551 | { |
| 552 | .name = "ldo2", |
| 553 | .id = LP8720_ID_LDO2, |
| 554 | .ops = &lp872x_ldo_ops, |
| 555 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| 556 | .volt_table = lp872x_ldo_vtbl, |
| 557 | .type = REGULATOR_VOLTAGE, |
| 558 | .owner = THIS_MODULE, |
| 559 | .vsel_reg = LP872X_LDO2_VOUT, |
| 560 | .vsel_mask = LP872X_VOUT_M, |
| 561 | .enable_reg = LP8720_ENABLE, |
| 562 | .enable_mask = LP872X_EN_LDO2_M, |
| 563 | }, |
| 564 | { |
| 565 | .name = "ldo3", |
| 566 | .id = LP8720_ID_LDO3, |
| 567 | .ops = &lp872x_ldo_ops, |
| 568 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| 569 | .volt_table = lp872x_ldo_vtbl, |
| 570 | .type = REGULATOR_VOLTAGE, |
| 571 | .owner = THIS_MODULE, |
| 572 | .vsel_reg = LP872X_LDO3_VOUT, |
| 573 | .vsel_mask = LP872X_VOUT_M, |
| 574 | .enable_reg = LP8720_ENABLE, |
| 575 | .enable_mask = LP872X_EN_LDO3_M, |
| 576 | }, |
| 577 | { |
| 578 | .name = "ldo4", |
| 579 | .id = LP8720_ID_LDO4, |
| 580 | .ops = &lp872x_ldo_ops, |
| 581 | .n_voltages = ARRAY_SIZE(lp8720_ldo4_vtbl), |
| 582 | .volt_table = lp8720_ldo4_vtbl, |
| 583 | .type = REGULATOR_VOLTAGE, |
| 584 | .owner = THIS_MODULE, |
| 585 | .vsel_reg = LP872X_LDO4_VOUT, |
| 586 | .vsel_mask = LP872X_VOUT_M, |
| 587 | .enable_reg = LP8720_ENABLE, |
| 588 | .enable_mask = LP872X_EN_LDO4_M, |
| 589 | }, |
| 590 | { |
| 591 | .name = "ldo5", |
| 592 | .id = LP8720_ID_LDO5, |
| 593 | .ops = &lp872x_ldo_ops, |
| 594 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| 595 | .volt_table = lp872x_ldo_vtbl, |
| 596 | .type = REGULATOR_VOLTAGE, |
| 597 | .owner = THIS_MODULE, |
| 598 | .vsel_reg = LP872X_LDO5_VOUT, |
| 599 | .vsel_mask = LP872X_VOUT_M, |
| 600 | .enable_reg = LP8720_ENABLE, |
| 601 | .enable_mask = LP872X_EN_LDO5_M, |
| 602 | }, |
| 603 | { |
| 604 | .name = "buck", |
| 605 | .id = LP8720_ID_BUCK, |
| 606 | .ops = &lp8720_buck_ops, |
| 607 | .n_voltages = ARRAY_SIZE(lp8720_buck_vtbl), |
| 608 | .volt_table = lp8720_buck_vtbl, |
| 609 | .type = REGULATOR_VOLTAGE, |
| 610 | .owner = THIS_MODULE, |
| 611 | .enable_reg = LP8720_ENABLE, |
| 612 | .enable_mask = LP8720_EN_BUCK_M, |
| 613 | }, |
| 614 | }; |
| 615 | |
| 616 | static struct regulator_desc lp8725_regulator_desc[] = { |
| 617 | { |
| 618 | .name = "ldo1", |
| 619 | .id = LP8725_ID_LDO1, |
| 620 | .ops = &lp872x_ldo_ops, |
| 621 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| 622 | .volt_table = lp872x_ldo_vtbl, |
| 623 | .type = REGULATOR_VOLTAGE, |
| 624 | .owner = THIS_MODULE, |
| 625 | .vsel_reg = LP872X_LDO1_VOUT, |
| 626 | .vsel_mask = LP872X_VOUT_M, |
| 627 | .enable_reg = LP8725_LDO_CTRL, |
| 628 | .enable_mask = LP872X_EN_LDO1_M, |
| 629 | }, |
| 630 | { |
| 631 | .name = "ldo2", |
| 632 | .id = LP8725_ID_LDO2, |
| 633 | .ops = &lp872x_ldo_ops, |
| 634 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| 635 | .volt_table = lp872x_ldo_vtbl, |
| 636 | .type = REGULATOR_VOLTAGE, |
| 637 | .owner = THIS_MODULE, |
| 638 | .vsel_reg = LP872X_LDO2_VOUT, |
| 639 | .vsel_mask = LP872X_VOUT_M, |
| 640 | .enable_reg = LP8725_LDO_CTRL, |
| 641 | .enable_mask = LP872X_EN_LDO2_M, |
| 642 | }, |
| 643 | { |
| 644 | .name = "ldo3", |
| 645 | .id = LP8725_ID_LDO3, |
| 646 | .ops = &lp872x_ldo_ops, |
| 647 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| 648 | .volt_table = lp872x_ldo_vtbl, |
| 649 | .type = REGULATOR_VOLTAGE, |
| 650 | .owner = THIS_MODULE, |
| 651 | .vsel_reg = LP872X_LDO3_VOUT, |
| 652 | .vsel_mask = LP872X_VOUT_M, |
| 653 | .enable_reg = LP8725_LDO_CTRL, |
| 654 | .enable_mask = LP872X_EN_LDO3_M, |
| 655 | }, |
| 656 | { |
| 657 | .name = "ldo4", |
| 658 | .id = LP8725_ID_LDO4, |
| 659 | .ops = &lp872x_ldo_ops, |
| 660 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| 661 | .volt_table = lp872x_ldo_vtbl, |
| 662 | .type = REGULATOR_VOLTAGE, |
| 663 | .owner = THIS_MODULE, |
| 664 | .vsel_reg = LP872X_LDO4_VOUT, |
| 665 | .vsel_mask = LP872X_VOUT_M, |
| 666 | .enable_reg = LP8725_LDO_CTRL, |
| 667 | .enable_mask = LP872X_EN_LDO4_M, |
| 668 | }, |
| 669 | { |
| 670 | .name = "ldo5", |
| 671 | .id = LP8725_ID_LDO5, |
| 672 | .ops = &lp872x_ldo_ops, |
| 673 | .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), |
| 674 | .volt_table = lp872x_ldo_vtbl, |
| 675 | .type = REGULATOR_VOLTAGE, |
| 676 | .owner = THIS_MODULE, |
| 677 | .vsel_reg = LP872X_LDO5_VOUT, |
| 678 | .vsel_mask = LP872X_VOUT_M, |
| 679 | .enable_reg = LP8725_LDO_CTRL, |
| 680 | .enable_mask = LP872X_EN_LDO5_M, |
| 681 | }, |
| 682 | { |
| 683 | .name = "lilo1", |
| 684 | .id = LP8725_ID_LILO1, |
| 685 | .ops = &lp872x_ldo_ops, |
| 686 | .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), |
| 687 | .volt_table = lp8725_lilo_vtbl, |
| 688 | .type = REGULATOR_VOLTAGE, |
| 689 | .owner = THIS_MODULE, |
| 690 | .vsel_reg = LP8725_LILO1_VOUT, |
| 691 | .vsel_mask = LP872X_VOUT_M, |
| 692 | .enable_reg = LP8725_LDO_CTRL, |
| 693 | .enable_mask = LP8725_EN_LILO1_M, |
| 694 | }, |
| 695 | { |
| 696 | .name = "lilo2", |
| 697 | .id = LP8725_ID_LILO2, |
| 698 | .ops = &lp872x_ldo_ops, |
| 699 | .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), |
| 700 | .volt_table = lp8725_lilo_vtbl, |
| 701 | .type = REGULATOR_VOLTAGE, |
| 702 | .owner = THIS_MODULE, |
| 703 | .vsel_reg = LP8725_LILO2_VOUT, |
| 704 | .vsel_mask = LP872X_VOUT_M, |
| 705 | .enable_reg = LP8725_LDO_CTRL, |
| 706 | .enable_mask = LP8725_EN_LILO2_M, |
| 707 | }, |
| 708 | { |
| 709 | .name = "buck1", |
| 710 | .id = LP8725_ID_BUCK1, |
| 711 | .ops = &lp8725_buck_ops, |
| 712 | .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl), |
| 713 | .volt_table = lp8725_buck_vtbl, |
| 714 | .type = REGULATOR_VOLTAGE, |
| 715 | .owner = THIS_MODULE, |
| 716 | .enable_reg = LP872X_GENERAL_CFG, |
| 717 | .enable_mask = LP8725_BUCK1_EN_M, |
| 718 | }, |
| 719 | { |
| 720 | .name = "buck2", |
| 721 | .id = LP8725_ID_BUCK2, |
| 722 | .ops = &lp8725_buck_ops, |
| 723 | .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl), |
| 724 | .volt_table = lp8725_buck_vtbl, |
| 725 | .type = REGULATOR_VOLTAGE, |
| 726 | .owner = THIS_MODULE, |
| 727 | .enable_reg = LP872X_GENERAL_CFG, |
| 728 | .enable_mask = LP8725_BUCK2_EN_M, |
| 729 | }, |
| 730 | }; |
| 731 | |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 732 | static int lp872x_init_dvs(struct lp872x *lp) |
| 733 | { |
| 734 | int ret, gpio; |
Kim, Milo | b158fba | 2012-09-05 04:39:16 +0000 | [diff] [blame] | 735 | struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL; |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 736 | enum lp872x_dvs_state pinstate; |
Kim, Milo | b158fba | 2012-09-05 04:39:16 +0000 | [diff] [blame] | 737 | u8 mask[] = { LP8720_EXT_DVS_M, LP8725_DVS1_M | LP8725_DVS2_M }; |
| 738 | u8 default_dvs_mode[] = { LP8720_DEFAULT_DVS, LP8725_DEFAULT_DVS }; |
| 739 | |
| 740 | if (!dvs) |
| 741 | goto set_default_dvs_mode; |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 742 | |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 743 | gpio = dvs->gpio; |
| 744 | if (!gpio_is_valid(gpio)) { |
| 745 | dev_err(lp->dev, "invalid gpio: %d\n", gpio); |
| 746 | return -EINVAL; |
| 747 | } |
| 748 | |
| 749 | pinstate = dvs->init_state; |
| 750 | ret = devm_gpio_request_one(lp->dev, gpio, pinstate, "LP872X DVS"); |
| 751 | if (ret) { |
| 752 | dev_err(lp->dev, "gpio request err: %d\n", ret); |
| 753 | return ret; |
| 754 | } |
| 755 | |
| 756 | lp->dvs_pin = pinstate; |
| 757 | lp->dvs_gpio = gpio; |
| 758 | |
| 759 | return 0; |
Kim, Milo | b158fba | 2012-09-05 04:39:16 +0000 | [diff] [blame] | 760 | |
| 761 | set_default_dvs_mode: |
| 762 | return lp872x_update_bits(lp, LP872X_GENERAL_CFG, mask[lp->chipid], |
| 763 | default_dvs_mode[lp->chipid]); |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 764 | } |
| 765 | |
| 766 | static int lp872x_config(struct lp872x *lp) |
| 767 | { |
| 768 | struct lp872x_platform_data *pdata = lp->pdata; |
| 769 | int ret; |
| 770 | |
Kim, Milo | 86b3fef | 2012-09-05 04:39:23 +0000 | [diff] [blame] | 771 | if (!pdata || !pdata->update_config) |
| 772 | goto init_dvs; |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 773 | |
| 774 | ret = lp872x_write_byte(lp, LP872X_GENERAL_CFG, pdata->general_config); |
| 775 | if (ret) |
| 776 | return ret; |
| 777 | |
Kim, Milo | 86b3fef | 2012-09-05 04:39:23 +0000 | [diff] [blame] | 778 | init_dvs: |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 779 | return lp872x_init_dvs(lp); |
| 780 | } |
| 781 | |
| 782 | static struct regulator_init_data |
Axel Lin | 5bae062 | 2012-07-15 16:57:12 +0800 | [diff] [blame] | 783 | *lp872x_find_regulator_init_data(int id, struct lp872x *lp) |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 784 | { |
Kim, Milo | 9ffaa86 | 2012-09-05 04:39:11 +0000 | [diff] [blame] | 785 | struct lp872x_platform_data *pdata = lp->pdata; |
Axel Lin | 5bae062 | 2012-07-15 16:57:12 +0800 | [diff] [blame] | 786 | int i; |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 787 | |
Kim, Milo | 9ffaa86 | 2012-09-05 04:39:11 +0000 | [diff] [blame] | 788 | if (!pdata) |
| 789 | return NULL; |
| 790 | |
Axel Lin | 5bae062 | 2012-07-15 16:57:12 +0800 | [diff] [blame] | 791 | for (i = 0; i < lp->num_regulators; i++) { |
Kim, Milo | 9ffaa86 | 2012-09-05 04:39:11 +0000 | [diff] [blame] | 792 | if (pdata->regulator_data[i].id == id) |
| 793 | return pdata->regulator_data[i].init_data; |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 794 | } |
| 795 | |
Axel Lin | 5bae062 | 2012-07-15 16:57:12 +0800 | [diff] [blame] | 796 | return NULL; |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 797 | } |
| 798 | |
| 799 | static int lp872x_regulator_register(struct lp872x *lp) |
| 800 | { |
| 801 | struct regulator_desc *desc; |
| 802 | struct regulator_config cfg = { }; |
| 803 | struct regulator_dev *rdev; |
| 804 | int i, ret; |
| 805 | |
| 806 | for (i = 0 ; i < lp->num_regulators ; i++) { |
| 807 | desc = (lp->chipid == LP8720) ? &lp8720_regulator_desc[i] : |
| 808 | &lp8725_regulator_desc[i]; |
| 809 | |
| 810 | cfg.dev = lp->dev; |
Axel Lin | 5bae062 | 2012-07-15 16:57:12 +0800 | [diff] [blame] | 811 | cfg.init_data = lp872x_find_regulator_init_data(desc->id, lp); |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 812 | cfg.driver_data = lp; |
| 813 | cfg.regmap = lp->regmap; |
| 814 | |
| 815 | rdev = regulator_register(desc, &cfg); |
| 816 | if (IS_ERR(rdev)) { |
| 817 | dev_err(lp->dev, "regulator register err"); |
| 818 | ret = PTR_ERR(rdev); |
| 819 | goto err; |
| 820 | } |
| 821 | |
| 822 | *(lp->regulators + i) = rdev; |
| 823 | } |
| 824 | |
| 825 | return 0; |
| 826 | err: |
| 827 | while (--i >= 0) { |
| 828 | rdev = *(lp->regulators + i); |
| 829 | regulator_unregister(rdev); |
| 830 | } |
| 831 | return ret; |
| 832 | } |
| 833 | |
| 834 | static void lp872x_regulator_unregister(struct lp872x *lp) |
| 835 | { |
| 836 | struct regulator_dev *rdev; |
| 837 | int i; |
| 838 | |
| 839 | for (i = 0 ; i < lp->num_regulators ; i++) { |
| 840 | rdev = *(lp->regulators + i); |
| 841 | regulator_unregister(rdev); |
| 842 | } |
| 843 | } |
| 844 | |
| 845 | static const struct regmap_config lp872x_regmap_config = { |
| 846 | .reg_bits = 8, |
| 847 | .val_bits = 8, |
| 848 | .max_register = MAX_REGISTERS, |
| 849 | }; |
| 850 | |
| 851 | static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id) |
| 852 | { |
| 853 | struct lp872x *lp; |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 854 | int ret, size, num_regulators; |
| 855 | const int lp872x_num_regulators[] = { |
| 856 | [LP8720] = LP8720_NUM_REGULATORS, |
| 857 | [LP8725] = LP8725_NUM_REGULATORS, |
| 858 | }; |
| 859 | |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 860 | lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL); |
| 861 | if (!lp) |
| 862 | goto err_mem; |
| 863 | |
| 864 | num_regulators = lp872x_num_regulators[id->driver_data]; |
| 865 | size = sizeof(struct regulator_dev *) * num_regulators; |
| 866 | |
| 867 | lp->regulators = devm_kzalloc(&cl->dev, size, GFP_KERNEL); |
| 868 | if (!lp->regulators) |
| 869 | goto err_mem; |
| 870 | |
| 871 | lp->regmap = devm_regmap_init_i2c(cl, &lp872x_regmap_config); |
| 872 | if (IS_ERR(lp->regmap)) { |
| 873 | ret = PTR_ERR(lp->regmap); |
| 874 | dev_err(&cl->dev, "regmap init i2c err: %d\n", ret); |
| 875 | goto err_dev; |
| 876 | } |
| 877 | |
| 878 | lp->dev = &cl->dev; |
Kim, Milo | 9ffaa86 | 2012-09-05 04:39:11 +0000 | [diff] [blame] | 879 | lp->pdata = cl->dev.platform_data; |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 880 | lp->chipid = id->driver_data; |
| 881 | lp->num_regulators = num_regulators; |
| 882 | i2c_set_clientdata(cl, lp); |
| 883 | |
| 884 | ret = lp872x_config(lp); |
| 885 | if (ret) |
| 886 | goto err_dev; |
| 887 | |
| 888 | return lp872x_regulator_register(lp); |
| 889 | |
| 890 | err_mem: |
| 891 | return -ENOMEM; |
| 892 | err_dev: |
| 893 | return ret; |
| 894 | } |
| 895 | |
Bill Pemberton | 8dc995f | 2012-11-19 13:26:10 -0500 | [diff] [blame] | 896 | static int lp872x_remove(struct i2c_client *cl) |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 897 | { |
| 898 | struct lp872x *lp = i2c_get_clientdata(cl); |
| 899 | |
| 900 | lp872x_regulator_unregister(lp); |
| 901 | return 0; |
| 902 | } |
| 903 | |
| 904 | static const struct i2c_device_id lp872x_ids[] = { |
| 905 | {"lp8720", LP8720}, |
| 906 | {"lp8725", LP8725}, |
| 907 | { } |
| 908 | }; |
| 909 | MODULE_DEVICE_TABLE(i2c, lp872x_ids); |
| 910 | |
| 911 | static struct i2c_driver lp872x_driver = { |
| 912 | .driver = { |
| 913 | .name = "lp872x", |
| 914 | .owner = THIS_MODULE, |
| 915 | }, |
| 916 | .probe = lp872x_probe, |
Bill Pemberton | 5eb9f2b | 2012-11-19 13:20:42 -0500 | [diff] [blame] | 917 | .remove = lp872x_remove, |
Kim, Milo | af8b5fc | 2012-06-19 07:08:22 +0000 | [diff] [blame] | 918 | .id_table = lp872x_ids, |
| 919 | }; |
| 920 | |
| 921 | module_i2c_driver(lp872x_driver); |
| 922 | |
| 923 | MODULE_DESCRIPTION("TI/National Semiconductor LP872x PMU Regulator Driver"); |
| 924 | MODULE_AUTHOR("Milo Kim"); |
| 925 | MODULE_LICENSE("GPL"); |