1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2012 Texas Instruments 4 * 5 * Author: Milo(Woogyom) Kim <milo.kim@ti.com> 6 */ 7 8 #include <linux/module.h> 9 #include <linux/slab.h> 10 #include <linux/i2c.h> 11 #include <linux/regmap.h> 12 #include <linux/err.h> 13 #include <linux/gpio/consumer.h> 14 #include <linux/delay.h> 15 #include <linux/regulator/lp872x.h> 16 #include <linux/regulator/driver.h> 17 #include <linux/platform_device.h> 18 #include <linux/of.h> 19 #include <linux/regulator/of_regulator.h> 20 21 /* Registers : LP8720/8725 shared */ 22 #define LP872X_GENERAL_CFG 0x00 23 #define LP872X_LDO1_VOUT 0x01 24 #define LP872X_LDO2_VOUT 0x02 25 #define LP872X_LDO3_VOUT 0x03 26 #define LP872X_LDO4_VOUT 0x04 27 #define LP872X_LDO5_VOUT 0x05 28 29 /* Registers : LP8720 */ 30 #define LP8720_BUCK_VOUT1 0x06 31 #define LP8720_BUCK_VOUT2 0x07 32 #define LP8720_ENABLE 0x08 33 34 /* Registers : LP8725 */ 35 #define LP8725_LILO1_VOUT 0x06 36 #define LP8725_LILO2_VOUT 0x07 37 #define LP8725_BUCK1_VOUT1 0x08 38 #define LP8725_BUCK1_VOUT2 0x09 39 #define LP8725_BUCK2_VOUT1 0x0A 40 #define LP8725_BUCK2_VOUT2 0x0B 41 #define LP8725_BUCK_CTRL 0x0C 42 #define LP8725_LDO_CTRL 0x0D 43 44 /* Mask/shift : LP8720/LP8725 shared */ 45 #define LP872X_VOUT_M 0x1F 46 #define LP872X_START_DELAY_M 0xE0 47 #define LP872X_START_DELAY_S 5 48 #define LP872X_EN_LDO1_M BIT(0) 49 #define LP872X_EN_LDO2_M BIT(1) 50 #define LP872X_EN_LDO3_M BIT(2) 51 #define LP872X_EN_LDO4_M BIT(3) 52 #define LP872X_EN_LDO5_M BIT(4) 53 54 /* Mask/shift : LP8720 */ 55 #define LP8720_TIMESTEP_S 0 /* Addr 00h */ 56 #define LP8720_TIMESTEP_M BIT(0) 57 #define LP8720_EXT_DVS_M BIT(2) 58 #define LP8720_BUCK_FPWM_S 5 /* Addr 07h */ 59 #define LP8720_BUCK_FPWM_M BIT(5) 60 #define LP8720_EN_BUCK_M BIT(5) /* Addr 08h */ 61 #define LP8720_DVS_SEL_M BIT(7) 62 63 /* Mask/shift : LP8725 */ 64 #define LP8725_TIMESTEP_M 0xC0 /* Addr 00h */ 65 #define LP8725_TIMESTEP_S 6 66 #define LP8725_BUCK1_EN_M BIT(0) 67 #define LP8725_DVS1_M BIT(2) 68 #define LP8725_DVS2_M BIT(3) 69 #define LP8725_BUCK2_EN_M BIT(4) 70 #define LP8725_BUCK_CL_M 0xC0 /* Addr 09h, 0Bh */ 71 #define LP8725_BUCK_CL_S 6 72 #define LP8725_BUCK1_FPWM_S 1 /* Addr 0Ch */ 73 #define LP8725_BUCK1_FPWM_M BIT(1) 74 #define LP8725_BUCK2_FPWM_S 5 75 #define LP8725_BUCK2_FPWM_M BIT(5) 76 #define LP8725_EN_LILO1_M BIT(5) /* Addr 0Dh */ 77 #define LP8725_EN_LILO2_M BIT(6) 78 79 /* PWM mode */ 80 #define LP872X_FORCE_PWM 1 81 #define LP872X_AUTO_PWM 0 82 83 #define LP8720_NUM_REGULATORS 6 84 #define LP8725_NUM_REGULATORS 9 85 #define EXTERN_DVS_USED 0 86 #define MAX_DELAY 6 87 88 /* Default DVS Mode */ 89 #define LP8720_DEFAULT_DVS 0 90 #define LP8725_DEFAULT_DVS BIT(2) 91 92 /* dump registers in regmap-debugfs */ 93 #define MAX_REGISTERS 0x0F 94 95 enum lp872x_id { 96 LP8720, 97 LP8725, 98 }; 99 100 struct lp872x { 101 struct regmap *regmap; 102 struct device *dev; 103 enum lp872x_id chipid; 104 struct lp872x_platform_data *pdata; 105 int num_regulators; 106 enum gpiod_flags dvs_pin; 107 }; 108 109 /* LP8720/LP8725 shared voltage table for LDOs */ 110 static const unsigned int lp872x_ldo_vtbl[] = { 111 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000, 112 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 2000000, 113 2100000, 2200000, 2300000, 2400000, 2500000, 2600000, 2650000, 2700000, 114 2750000, 2800000, 2850000, 2900000, 2950000, 3000000, 3100000, 3300000, 115 }; 116 117 /* LP8720 LDO4 voltage table */ 118 static const unsigned int lp8720_ldo4_vtbl[] = { 119 800000, 850000, 900000, 1000000, 1100000, 1200000, 1250000, 1300000, 120 1350000, 1400000, 1450000, 1500000, 1550000, 1600000, 1650000, 1700000, 121 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000, 122 2400000, 2500000, 2600000, 2650000, 2700000, 2750000, 2800000, 2850000, 123 }; 124 125 /* LP8725 LILO(Low Input Low Output) voltage table */ 126 static const unsigned int lp8725_lilo_vtbl[] = { 127 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, 128 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000, 129 1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000, 130 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000, 131 }; 132 133 /* LP8720 BUCK voltage table */ 134 #define EXT_R 0 /* external resistor divider */ 135 static const unsigned int lp8720_buck_vtbl[] = { 136 EXT_R, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 137 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 138 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 139 1950000, 2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 140 }; 141 142 /* LP8725 BUCK voltage table */ 143 static const unsigned int lp8725_buck_vtbl[] = { 144 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, 145 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000, 146 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000, 147 2400000, 2500000, 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, 148 }; 149 150 /* LP8725 BUCK current limit */ 151 static const unsigned int lp8725_buck_uA[] = { 152 460000, 780000, 1050000, 1370000, 153 }; 154 155 static int lp872x_read_byte(struct lp872x *lp, u8 addr, u8 *data) 156 { 157 int ret; 158 unsigned int val; 159 160 ret = regmap_read(lp->regmap, addr, &val); 161 if (ret < 0) { 162 dev_err(lp->dev, "failed to read 0x%.2x\n", addr); 163 return ret; 164 } 165 166 *data = (u8)val; 167 return 0; 168 } 169 170 static inline int lp872x_write_byte(struct lp872x *lp, u8 addr, u8 data) 171 { 172 return regmap_write(lp->regmap, addr, data); 173 } 174 175 static inline int lp872x_update_bits(struct lp872x *lp, u8 addr, 176 unsigned int mask, u8 data) 177 { 178 return regmap_update_bits(lp->regmap, addr, mask, data); 179 } 180 181 static int lp872x_get_timestep_usec(struct lp872x *lp) 182 { 183 enum lp872x_id chip = lp->chipid; 184 u8 val, mask, shift; 185 int *time_usec, size, ret; 186 int lp8720_time_usec[] = { 25, 50 }; 187 int lp8725_time_usec[] = { 32, 64, 128, 256 }; 188 189 switch (chip) { 190 case LP8720: 191 mask = LP8720_TIMESTEP_M; 192 shift = LP8720_TIMESTEP_S; 193 time_usec = &lp8720_time_usec[0]; 194 size = ARRAY_SIZE(lp8720_time_usec); 195 break; 196 case LP8725: 197 mask = LP8725_TIMESTEP_M; 198 shift = LP8725_TIMESTEP_S; 199 time_usec = &lp8725_time_usec[0]; 200 size = ARRAY_SIZE(lp8725_time_usec); 201 break; 202 default: 203 return -EINVAL; 204 } 205 206 ret = lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val); 207 if (ret) 208 return ret; 209 210 val = (val & mask) >> shift; 211 if (val >= size) 212 return -EINVAL; 213 214 return *(time_usec + val); 215 } 216 217 static int lp872x_regulator_enable_time(struct regulator_dev *rdev) 218 { 219 struct lp872x *lp = rdev_get_drvdata(rdev); 220 enum lp872x_regulator_id rid = rdev_get_id(rdev); 221 int time_step_us = lp872x_get_timestep_usec(lp); 222 int ret; 223 u8 addr, val; 224 225 if (time_step_us < 0) 226 return time_step_us; 227 228 switch (rid) { 229 case LP8720_ID_LDO1 ... LP8720_ID_BUCK: 230 addr = LP872X_LDO1_VOUT + rid; 231 break; 232 case LP8725_ID_LDO1 ... LP8725_ID_BUCK1: 233 addr = LP872X_LDO1_VOUT + rid - LP8725_ID_BASE; 234 break; 235 case LP8725_ID_BUCK2: 236 addr = LP8725_BUCK2_VOUT1; 237 break; 238 default: 239 return -EINVAL; 240 } 241 242 ret = lp872x_read_byte(lp, addr, &val); 243 if (ret) 244 return ret; 245 246 val = (val & LP872X_START_DELAY_M) >> LP872X_START_DELAY_S; 247 248 return val > MAX_DELAY ? 0 : val * time_step_us; 249 } 250 251 static void lp872x_set_dvs(struct lp872x *lp, enum lp872x_dvs_sel dvs_sel, 252 struct gpio_desc *gpio) 253 { 254 enum gpiod_flags state; 255 256 state = dvs_sel == SEL_V1 ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW; 257 gpiod_set_value(gpio, state); 258 lp->dvs_pin = state; 259 } 260 261 static u8 lp872x_select_buck_vout_addr(struct lp872x *lp, 262 enum lp872x_regulator_id buck) 263 { 264 u8 val, addr; 265 266 if (lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val)) 267 return 0; 268 269 switch (buck) { 270 case LP8720_ID_BUCK: 271 if (val & LP8720_EXT_DVS_M) { 272 addr = (lp->dvs_pin == GPIOD_OUT_HIGH) ? 273 LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2; 274 } else { 275 if (lp872x_read_byte(lp, LP8720_ENABLE, &val)) 276 return 0; 277 278 addr = val & LP8720_DVS_SEL_M ? 279 LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2; 280 } 281 break; 282 case LP8725_ID_BUCK1: 283 if (val & LP8725_DVS1_M) 284 addr = LP8725_BUCK1_VOUT1; 285 else 286 addr = (lp->dvs_pin == GPIOD_OUT_HIGH) ? 287 LP8725_BUCK1_VOUT1 : LP8725_BUCK1_VOUT2; 288 break; 289 case LP8725_ID_BUCK2: 290 addr = val & LP8725_DVS2_M ? 291 LP8725_BUCK2_VOUT1 : LP8725_BUCK2_VOUT2; 292 break; 293 default: 294 return 0; 295 } 296 297 return addr; 298 } 299 300 static bool lp872x_is_valid_buck_addr(u8 addr) 301 { 302 switch (addr) { 303 case LP8720_BUCK_VOUT1: 304 case LP8720_BUCK_VOUT2: 305 case LP8725_BUCK1_VOUT1: 306 case LP8725_BUCK1_VOUT2: 307 case LP8725_BUCK2_VOUT1: 308 case LP8725_BUCK2_VOUT2: 309 return true; 310 default: 311 return false; 312 } 313 } 314 315 static int lp872x_buck_set_voltage_sel(struct regulator_dev *rdev, 316 unsigned selector) 317 { 318 struct lp872x *lp = rdev_get_drvdata(rdev); 319 enum lp872x_regulator_id buck = rdev_get_id(rdev); 320 u8 addr, mask = LP872X_VOUT_M; 321 struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL; 322 323 if (dvs && dvs->gpio) 324 lp872x_set_dvs(lp, dvs->vsel, dvs->gpio); 325 326 addr = lp872x_select_buck_vout_addr(lp, buck); 327 if (!lp872x_is_valid_buck_addr(addr)) 328 return -EINVAL; 329 330 return lp872x_update_bits(lp, addr, mask, selector); 331 } 332 333 static int lp872x_buck_get_voltage_sel(struct regulator_dev *rdev) 334 { 335 struct lp872x *lp = rdev_get_drvdata(rdev); 336 enum lp872x_regulator_id buck = rdev_get_id(rdev); 337 u8 addr, val; 338 int ret; 339 340 addr = lp872x_select_buck_vout_addr(lp, buck); 341 if (!lp872x_is_valid_buck_addr(addr)) 342 return -EINVAL; 343 344 ret = lp872x_read_byte(lp, addr, &val); 345 if (ret) 346 return ret; 347 348 return val & LP872X_VOUT_M; 349 } 350 351 static int lp872x_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) 352 { 353 struct lp872x *lp = rdev_get_drvdata(rdev); 354 enum lp872x_regulator_id buck = rdev_get_id(rdev); 355 u8 addr, mask, shift, val; 356 357 switch (buck) { 358 case LP8720_ID_BUCK: 359 addr = LP8720_BUCK_VOUT2; 360 mask = LP8720_BUCK_FPWM_M; 361 shift = LP8720_BUCK_FPWM_S; 362 break; 363 case LP8725_ID_BUCK1: 364 addr = LP8725_BUCK_CTRL; 365 mask = LP8725_BUCK1_FPWM_M; 366 shift = LP8725_BUCK1_FPWM_S; 367 break; 368 case LP8725_ID_BUCK2: 369 addr = LP8725_BUCK_CTRL; 370 mask = LP8725_BUCK2_FPWM_M; 371 shift = LP8725_BUCK2_FPWM_S; 372 break; 373 default: 374 return -EINVAL; 375 } 376 377 if (mode == REGULATOR_MODE_FAST) 378 val = LP872X_FORCE_PWM << shift; 379 else if (mode == REGULATOR_MODE_NORMAL) 380 val = LP872X_AUTO_PWM << shift; 381 else 382 return -EINVAL; 383 384 return lp872x_update_bits(lp, addr, mask, val); 385 } 386 387 static unsigned int lp872x_buck_get_mode(struct regulator_dev *rdev) 388 { 389 struct lp872x *lp = rdev_get_drvdata(rdev); 390 enum lp872x_regulator_id buck = rdev_get_id(rdev); 391 u8 addr, mask, val; 392 int ret; 393 394 switch (buck) { 395 case LP8720_ID_BUCK: 396 addr = LP8720_BUCK_VOUT2; 397 mask = LP8720_BUCK_FPWM_M; 398 break; 399 case LP8725_ID_BUCK1: 400 addr = LP8725_BUCK_CTRL; 401 mask = LP8725_BUCK1_FPWM_M; 402 break; 403 case LP8725_ID_BUCK2: 404 addr = LP8725_BUCK_CTRL; 405 mask = LP8725_BUCK2_FPWM_M; 406 break; 407 default: 408 return -EINVAL; 409 } 410 411 ret = lp872x_read_byte(lp, addr, &val); 412 if (ret) 413 return ret; 414 415 return val & mask ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL; 416 } 417 418 static const struct regulator_ops lp872x_ldo_ops = { 419 .list_voltage = regulator_list_voltage_table, 420 .map_voltage = regulator_map_voltage_ascend, 421 .set_voltage_sel = regulator_set_voltage_sel_regmap, 422 .get_voltage_sel = regulator_get_voltage_sel_regmap, 423 .enable = regulator_enable_regmap, 424 .disable = regulator_disable_regmap, 425 .is_enabled = regulator_is_enabled_regmap, 426 .enable_time = lp872x_regulator_enable_time, 427 }; 428 429 static const struct regulator_ops lp8720_buck_ops = { 430 .list_voltage = regulator_list_voltage_table, 431 .map_voltage = regulator_map_voltage_ascend, 432 .set_voltage_sel = lp872x_buck_set_voltage_sel, 433 .get_voltage_sel = lp872x_buck_get_voltage_sel, 434 .enable = regulator_enable_regmap, 435 .disable = regulator_disable_regmap, 436 .is_enabled = regulator_is_enabled_regmap, 437 .enable_time = lp872x_regulator_enable_time, 438 .set_mode = lp872x_buck_set_mode, 439 .get_mode = lp872x_buck_get_mode, 440 }; 441 442 static const struct regulator_ops lp8725_buck_ops = { 443 .list_voltage = regulator_list_voltage_table, 444 .map_voltage = regulator_map_voltage_ascend, 445 .set_voltage_sel = lp872x_buck_set_voltage_sel, 446 .get_voltage_sel = lp872x_buck_get_voltage_sel, 447 .enable = regulator_enable_regmap, 448 .disable = regulator_disable_regmap, 449 .is_enabled = regulator_is_enabled_regmap, 450 .enable_time = lp872x_regulator_enable_time, 451 .set_mode = lp872x_buck_set_mode, 452 .get_mode = lp872x_buck_get_mode, 453 .set_current_limit = regulator_set_current_limit_regmap, 454 .get_current_limit = regulator_get_current_limit_regmap, 455 }; 456 457 static const struct regulator_desc lp8720_regulator_desc[] = { 458 { 459 .name = "ldo1", 460 .of_match = of_match_ptr("ldo1"), 461 .id = LP8720_ID_LDO1, 462 .ops = &lp872x_ldo_ops, 463 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 464 .volt_table = lp872x_ldo_vtbl, 465 .type = REGULATOR_VOLTAGE, 466 .owner = THIS_MODULE, 467 .vsel_reg = LP872X_LDO1_VOUT, 468 .vsel_mask = LP872X_VOUT_M, 469 .enable_reg = LP8720_ENABLE, 470 .enable_mask = LP872X_EN_LDO1_M, 471 }, 472 { 473 .name = "ldo2", 474 .of_match = of_match_ptr("ldo2"), 475 .id = LP8720_ID_LDO2, 476 .ops = &lp872x_ldo_ops, 477 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 478 .volt_table = lp872x_ldo_vtbl, 479 .type = REGULATOR_VOLTAGE, 480 .owner = THIS_MODULE, 481 .vsel_reg = LP872X_LDO2_VOUT, 482 .vsel_mask = LP872X_VOUT_M, 483 .enable_reg = LP8720_ENABLE, 484 .enable_mask = LP872X_EN_LDO2_M, 485 }, 486 { 487 .name = "ldo3", 488 .of_match = of_match_ptr("ldo3"), 489 .id = LP8720_ID_LDO3, 490 .ops = &lp872x_ldo_ops, 491 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 492 .volt_table = lp872x_ldo_vtbl, 493 .type = REGULATOR_VOLTAGE, 494 .owner = THIS_MODULE, 495 .vsel_reg = LP872X_LDO3_VOUT, 496 .vsel_mask = LP872X_VOUT_M, 497 .enable_reg = LP8720_ENABLE, 498 .enable_mask = LP872X_EN_LDO3_M, 499 }, 500 { 501 .name = "ldo4", 502 .of_match = of_match_ptr("ldo4"), 503 .id = LP8720_ID_LDO4, 504 .ops = &lp872x_ldo_ops, 505 .n_voltages = ARRAY_SIZE(lp8720_ldo4_vtbl), 506 .volt_table = lp8720_ldo4_vtbl, 507 .type = REGULATOR_VOLTAGE, 508 .owner = THIS_MODULE, 509 .vsel_reg = LP872X_LDO4_VOUT, 510 .vsel_mask = LP872X_VOUT_M, 511 .enable_reg = LP8720_ENABLE, 512 .enable_mask = LP872X_EN_LDO4_M, 513 }, 514 { 515 .name = "ldo5", 516 .of_match = of_match_ptr("ldo5"), 517 .id = LP8720_ID_LDO5, 518 .ops = &lp872x_ldo_ops, 519 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 520 .volt_table = lp872x_ldo_vtbl, 521 .type = REGULATOR_VOLTAGE, 522 .owner = THIS_MODULE, 523 .vsel_reg = LP872X_LDO5_VOUT, 524 .vsel_mask = LP872X_VOUT_M, 525 .enable_reg = LP8720_ENABLE, 526 .enable_mask = LP872X_EN_LDO5_M, 527 }, 528 { 529 .name = "buck", 530 .of_match = of_match_ptr("buck"), 531 .id = LP8720_ID_BUCK, 532 .ops = &lp8720_buck_ops, 533 .n_voltages = ARRAY_SIZE(lp8720_buck_vtbl), 534 .volt_table = lp8720_buck_vtbl, 535 .type = REGULATOR_VOLTAGE, 536 .owner = THIS_MODULE, 537 .enable_reg = LP8720_ENABLE, 538 .enable_mask = LP8720_EN_BUCK_M, 539 }, 540 }; 541 542 static const struct regulator_desc lp8725_regulator_desc[] = { 543 { 544 .name = "ldo1", 545 .of_match = of_match_ptr("ldo1"), 546 .id = LP8725_ID_LDO1, 547 .ops = &lp872x_ldo_ops, 548 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 549 .volt_table = lp872x_ldo_vtbl, 550 .type = REGULATOR_VOLTAGE, 551 .owner = THIS_MODULE, 552 .vsel_reg = LP872X_LDO1_VOUT, 553 .vsel_mask = LP872X_VOUT_M, 554 .enable_reg = LP8725_LDO_CTRL, 555 .enable_mask = LP872X_EN_LDO1_M, 556 }, 557 { 558 .name = "ldo2", 559 .of_match = of_match_ptr("ldo2"), 560 .id = LP8725_ID_LDO2, 561 .ops = &lp872x_ldo_ops, 562 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 563 .volt_table = lp872x_ldo_vtbl, 564 .type = REGULATOR_VOLTAGE, 565 .owner = THIS_MODULE, 566 .vsel_reg = LP872X_LDO2_VOUT, 567 .vsel_mask = LP872X_VOUT_M, 568 .enable_reg = LP8725_LDO_CTRL, 569 .enable_mask = LP872X_EN_LDO2_M, 570 }, 571 { 572 .name = "ldo3", 573 .of_match = of_match_ptr("ldo3"), 574 .id = LP8725_ID_LDO3, 575 .ops = &lp872x_ldo_ops, 576 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 577 .volt_table = lp872x_ldo_vtbl, 578 .type = REGULATOR_VOLTAGE, 579 .owner = THIS_MODULE, 580 .vsel_reg = LP872X_LDO3_VOUT, 581 .vsel_mask = LP872X_VOUT_M, 582 .enable_reg = LP8725_LDO_CTRL, 583 .enable_mask = LP872X_EN_LDO3_M, 584 }, 585 { 586 .name = "ldo4", 587 .of_match = of_match_ptr("ldo4"), 588 .id = LP8725_ID_LDO4, 589 .ops = &lp872x_ldo_ops, 590 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 591 .volt_table = lp872x_ldo_vtbl, 592 .type = REGULATOR_VOLTAGE, 593 .owner = THIS_MODULE, 594 .vsel_reg = LP872X_LDO4_VOUT, 595 .vsel_mask = LP872X_VOUT_M, 596 .enable_reg = LP8725_LDO_CTRL, 597 .enable_mask = LP872X_EN_LDO4_M, 598 }, 599 { 600 .name = "ldo5", 601 .of_match = of_match_ptr("ldo5"), 602 .id = LP8725_ID_LDO5, 603 .ops = &lp872x_ldo_ops, 604 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 605 .volt_table = lp872x_ldo_vtbl, 606 .type = REGULATOR_VOLTAGE, 607 .owner = THIS_MODULE, 608 .vsel_reg = LP872X_LDO5_VOUT, 609 .vsel_mask = LP872X_VOUT_M, 610 .enable_reg = LP8725_LDO_CTRL, 611 .enable_mask = LP872X_EN_LDO5_M, 612 }, 613 { 614 .name = "lilo1", 615 .of_match = of_match_ptr("lilo1"), 616 .id = LP8725_ID_LILO1, 617 .ops = &lp872x_ldo_ops, 618 .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), 619 .volt_table = lp8725_lilo_vtbl, 620 .type = REGULATOR_VOLTAGE, 621 .owner = THIS_MODULE, 622 .vsel_reg = LP8725_LILO1_VOUT, 623 .vsel_mask = LP872X_VOUT_M, 624 .enable_reg = LP8725_LDO_CTRL, 625 .enable_mask = LP8725_EN_LILO1_M, 626 }, 627 { 628 .name = "lilo2", 629 .of_match = of_match_ptr("lilo2"), 630 .id = LP8725_ID_LILO2, 631 .ops = &lp872x_ldo_ops, 632 .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), 633 .volt_table = lp8725_lilo_vtbl, 634 .type = REGULATOR_VOLTAGE, 635 .owner = THIS_MODULE, 636 .vsel_reg = LP8725_LILO2_VOUT, 637 .vsel_mask = LP872X_VOUT_M, 638 .enable_reg = LP8725_LDO_CTRL, 639 .enable_mask = LP8725_EN_LILO2_M, 640 }, 641 { 642 .name = "buck1", 643 .of_match = of_match_ptr("buck1"), 644 .id = LP8725_ID_BUCK1, 645 .ops = &lp8725_buck_ops, 646 .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl), 647 .volt_table = lp8725_buck_vtbl, 648 .type = REGULATOR_VOLTAGE, 649 .owner = THIS_MODULE, 650 .enable_reg = LP872X_GENERAL_CFG, 651 .enable_mask = LP8725_BUCK1_EN_M, 652 .curr_table = lp8725_buck_uA, 653 .n_current_limits = ARRAY_SIZE(lp8725_buck_uA), 654 .csel_reg = LP8725_BUCK1_VOUT2, 655 .csel_mask = LP8725_BUCK_CL_M, 656 }, 657 { 658 .name = "buck2", 659 .of_match = of_match_ptr("buck2"), 660 .id = LP8725_ID_BUCK2, 661 .ops = &lp8725_buck_ops, 662 .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl), 663 .volt_table = lp8725_buck_vtbl, 664 .type = REGULATOR_VOLTAGE, 665 .owner = THIS_MODULE, 666 .enable_reg = LP872X_GENERAL_CFG, 667 .enable_mask = LP8725_BUCK2_EN_M, 668 .curr_table = lp8725_buck_uA, 669 .n_current_limits = ARRAY_SIZE(lp8725_buck_uA), 670 .csel_reg = LP8725_BUCK2_VOUT2, 671 .csel_mask = LP8725_BUCK_CL_M, 672 }, 673 }; 674 675 static int lp872x_init_dvs(struct lp872x *lp) 676 { 677 struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL; 678 enum gpiod_flags pinstate; 679 u8 mask[] = { LP8720_EXT_DVS_M, LP8725_DVS1_M | LP8725_DVS2_M }; 680 u8 default_dvs_mode[] = { LP8720_DEFAULT_DVS, LP8725_DEFAULT_DVS }; 681 682 if (!dvs) 683 goto set_default_dvs_mode; 684 685 if (!dvs->gpio) 686 goto set_default_dvs_mode; 687 688 pinstate = dvs->init_state; 689 dvs->gpio = devm_gpiod_get_optional(lp->dev, "ti,dvs", pinstate); 690 691 if (IS_ERR(dvs->gpio)) { 692 dev_err(lp->dev, "gpio request err: %ld\n", PTR_ERR(dvs->gpio)); 693 return PTR_ERR(dvs->gpio); 694 } 695 696 lp->dvs_pin = pinstate; 697 698 return 0; 699 700 set_default_dvs_mode: 701 return lp872x_update_bits(lp, LP872X_GENERAL_CFG, mask[lp->chipid], 702 default_dvs_mode[lp->chipid]); 703 } 704 705 static int lp872x_hw_enable(struct lp872x *lp) 706 { 707 if (!lp->pdata) 708 return -EINVAL; 709 710 if (!lp->pdata->enable_gpio) 711 return 0; 712 713 /* Always set enable GPIO high. */ 714 lp->pdata->enable_gpio = devm_gpiod_get_optional(lp->dev, "enable", GPIOD_OUT_HIGH); 715 if (IS_ERR(lp->pdata->enable_gpio)) { 716 dev_err(lp->dev, "gpio request err: %ld\n", PTR_ERR(lp->pdata->enable_gpio)); 717 return PTR_ERR(lp->pdata->enable_gpio); 718 } 719 720 /* Each chip has a different enable delay. */ 721 if (lp->chipid == LP8720) 722 usleep_range(LP8720_ENABLE_DELAY, 1.5 * LP8720_ENABLE_DELAY); 723 else 724 usleep_range(LP8725_ENABLE_DELAY, 1.5 * LP8725_ENABLE_DELAY); 725 726 return 0; 727 } 728 729 static int lp872x_config(struct lp872x *lp) 730 { 731 struct lp872x_platform_data *pdata = lp->pdata; 732 int ret; 733 734 if (!pdata || !pdata->update_config) 735 goto init_dvs; 736 737 ret = lp872x_write_byte(lp, LP872X_GENERAL_CFG, pdata->general_config); 738 if (ret) 739 return ret; 740 741 init_dvs: 742 return lp872x_init_dvs(lp); 743 } 744 745 static struct regulator_init_data 746 *lp872x_find_regulator_init_data(int id, struct lp872x *lp) 747 { 748 struct lp872x_platform_data *pdata = lp->pdata; 749 int i; 750 751 if (!pdata) 752 return NULL; 753 754 for (i = 0; i < lp->num_regulators; i++) { 755 if (pdata->regulator_data[i].id == id) 756 return pdata->regulator_data[i].init_data; 757 } 758 759 return NULL; 760 } 761 762 static int lp872x_regulator_register(struct lp872x *lp) 763 { 764 const struct regulator_desc *desc; 765 struct regulator_config cfg = { }; 766 struct regulator_dev *rdev; 767 int i; 768 769 for (i = 0; i < lp->num_regulators; i++) { 770 desc = (lp->chipid == LP8720) ? &lp8720_regulator_desc[i] : 771 &lp8725_regulator_desc[i]; 772 773 cfg.dev = lp->dev; 774 cfg.init_data = lp872x_find_regulator_init_data(desc->id, lp); 775 cfg.driver_data = lp; 776 cfg.regmap = lp->regmap; 777 778 rdev = devm_regulator_register(lp->dev, desc, &cfg); 779 if (IS_ERR(rdev)) { 780 dev_err(lp->dev, "regulator register err"); 781 return PTR_ERR(rdev); 782 } 783 } 784 785 return 0; 786 } 787 788 static const struct regmap_config lp872x_regmap_config = { 789 .reg_bits = 8, 790 .val_bits = 8, 791 .max_register = MAX_REGISTERS, 792 }; 793 794 #ifdef CONFIG_OF 795 796 #define LP872X_VALID_OPMODE (REGULATOR_MODE_FAST | REGULATOR_MODE_NORMAL) 797 798 static struct of_regulator_match lp8720_matches[] = { 799 { .name = "ldo1", .driver_data = (void *)LP8720_ID_LDO1, }, 800 { .name = "ldo2", .driver_data = (void *)LP8720_ID_LDO2, }, 801 { .name = "ldo3", .driver_data = (void *)LP8720_ID_LDO3, }, 802 { .name = "ldo4", .driver_data = (void *)LP8720_ID_LDO4, }, 803 { .name = "ldo5", .driver_data = (void *)LP8720_ID_LDO5, }, 804 { .name = "buck", .driver_data = (void *)LP8720_ID_BUCK, }, 805 }; 806 807 static struct of_regulator_match lp8725_matches[] = { 808 { .name = "ldo1", .driver_data = (void *)LP8725_ID_LDO1, }, 809 { .name = "ldo2", .driver_data = (void *)LP8725_ID_LDO2, }, 810 { .name = "ldo3", .driver_data = (void *)LP8725_ID_LDO3, }, 811 { .name = "ldo4", .driver_data = (void *)LP8725_ID_LDO4, }, 812 { .name = "ldo5", .driver_data = (void *)LP8725_ID_LDO5, }, 813 { .name = "lilo1", .driver_data = (void *)LP8725_ID_LILO1, }, 814 { .name = "lilo2", .driver_data = (void *)LP8725_ID_LILO2, }, 815 { .name = "buck1", .driver_data = (void *)LP8725_ID_BUCK1, }, 816 { .name = "buck2", .driver_data = (void *)LP8725_ID_BUCK2, }, 817 }; 818 819 static struct lp872x_platform_data 820 *lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which) 821 { 822 struct device_node *np = dev->of_node; 823 struct lp872x_platform_data *pdata; 824 struct of_regulator_match *match; 825 int num_matches; 826 int count; 827 int i; 828 u8 dvs_state; 829 830 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); 831 if (!pdata) 832 return ERR_PTR(-ENOMEM); 833 834 of_property_read_u8(np, "ti,general-config", &pdata->general_config); 835 pdata->update_config = of_property_read_bool(np, "ti,update-config"); 836 837 pdata->dvs = devm_kzalloc(dev, sizeof(struct lp872x_dvs), GFP_KERNEL); 838 if (!pdata->dvs) 839 return ERR_PTR(-ENOMEM); 840 841 of_property_read_u8(np, "ti,dvs-vsel", (u8 *)&pdata->dvs->vsel); 842 of_property_read_u8(np, "ti,dvs-state", &dvs_state); 843 pdata->dvs->init_state = dvs_state ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW; 844 845 if (of_get_child_count(np) == 0) 846 goto out; 847 848 switch (which) { 849 case LP8720: 850 match = lp8720_matches; 851 num_matches = ARRAY_SIZE(lp8720_matches); 852 break; 853 case LP8725: 854 match = lp8725_matches; 855 num_matches = ARRAY_SIZE(lp8725_matches); 856 break; 857 default: 858 goto out; 859 } 860 861 count = of_regulator_match(dev, np, match, num_matches); 862 if (count <= 0) 863 goto out; 864 865 for (i = 0; i < num_matches; i++) { 866 pdata->regulator_data[i].id = 867 (enum lp872x_regulator_id)match[i].driver_data; 868 pdata->regulator_data[i].init_data = match[i].init_data; 869 } 870 out: 871 return pdata; 872 } 873 #else 874 static struct lp872x_platform_data 875 *lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which) 876 { 877 return NULL; 878 } 879 #endif 880 881 static int lp872x_probe(struct i2c_client *cl) 882 { 883 const struct i2c_device_id *id = i2c_client_get_device_id(cl); 884 struct lp872x *lp; 885 struct lp872x_platform_data *pdata; 886 int ret; 887 static const int lp872x_num_regulators[] = { 888 [LP8720] = LP8720_NUM_REGULATORS, 889 [LP8725] = LP8725_NUM_REGULATORS, 890 }; 891 892 if (cl->dev.of_node) { 893 pdata = lp872x_populate_pdata_from_dt(&cl->dev, 894 (enum lp872x_id)id->driver_data); 895 if (IS_ERR(pdata)) 896 return PTR_ERR(pdata); 897 } else { 898 pdata = dev_get_platdata(&cl->dev); 899 } 900 901 lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL); 902 if (!lp) 903 return -ENOMEM; 904 905 lp->num_regulators = lp872x_num_regulators[id->driver_data]; 906 907 lp->regmap = devm_regmap_init_i2c(cl, &lp872x_regmap_config); 908 if (IS_ERR(lp->regmap)) { 909 ret = PTR_ERR(lp->regmap); 910 dev_err(&cl->dev, "regmap init i2c err: %d\n", ret); 911 return ret; 912 } 913 914 lp->dev = &cl->dev; 915 lp->pdata = pdata; 916 lp->chipid = id->driver_data; 917 i2c_set_clientdata(cl, lp); 918 919 ret = lp872x_hw_enable(lp); 920 if (ret) 921 return ret; 922 923 ret = lp872x_config(lp); 924 if (ret) 925 return ret; 926 927 return lp872x_regulator_register(lp); 928 } 929 930 static const struct of_device_id lp872x_dt_ids[] __maybe_unused = { 931 { .compatible = "ti,lp8720", }, 932 { .compatible = "ti,lp8725", }, 933 { } 934 }; 935 MODULE_DEVICE_TABLE(of, lp872x_dt_ids); 936 937 static const struct i2c_device_id lp872x_ids[] = { 938 {"lp8720", LP8720}, 939 {"lp8725", LP8725}, 940 { } 941 }; 942 MODULE_DEVICE_TABLE(i2c, lp872x_ids); 943 944 static struct i2c_driver lp872x_driver = { 945 .driver = { 946 .name = "lp872x", 947 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 948 .of_match_table = of_match_ptr(lp872x_dt_ids), 949 }, 950 .probe = lp872x_probe, 951 .id_table = lp872x_ids, 952 }; 953 954 module_i2c_driver(lp872x_driver); 955 956 MODULE_DESCRIPTION("TI/National Semiconductor LP872x PMU Regulator Driver"); 957 MODULE_AUTHOR("Milo Kim"); 958 MODULE_LICENSE("GPL"); 959