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/delay.h> 19 #include <linux/regulator/lp872x.h> 20 #include <linux/regulator/driver.h> 21 #include <linux/platform_device.h> 22 #include <linux/of.h> 23 #include <linux/of_gpio.h> 24 #include <linux/regulator/of_regulator.h> 25 26 /* Registers : LP8720/8725 shared */ 27 #define LP872X_GENERAL_CFG 0x00 28 #define LP872X_LDO1_VOUT 0x01 29 #define LP872X_LDO2_VOUT 0x02 30 #define LP872X_LDO3_VOUT 0x03 31 #define LP872X_LDO4_VOUT 0x04 32 #define LP872X_LDO5_VOUT 0x05 33 34 /* Registers : LP8720 */ 35 #define LP8720_BUCK_VOUT1 0x06 36 #define LP8720_BUCK_VOUT2 0x07 37 #define LP8720_ENABLE 0x08 38 39 /* Registers : LP8725 */ 40 #define LP8725_LILO1_VOUT 0x06 41 #define LP8725_LILO2_VOUT 0x07 42 #define LP8725_BUCK1_VOUT1 0x08 43 #define LP8725_BUCK1_VOUT2 0x09 44 #define LP8725_BUCK2_VOUT1 0x0A 45 #define LP8725_BUCK2_VOUT2 0x0B 46 #define LP8725_BUCK_CTRL 0x0C 47 #define LP8725_LDO_CTRL 0x0D 48 49 /* Mask/shift : LP8720/LP8725 shared */ 50 #define LP872X_VOUT_M 0x1F 51 #define LP872X_START_DELAY_M 0xE0 52 #define LP872X_START_DELAY_S 5 53 #define LP872X_EN_LDO1_M BIT(0) 54 #define LP872X_EN_LDO2_M BIT(1) 55 #define LP872X_EN_LDO3_M BIT(2) 56 #define LP872X_EN_LDO4_M BIT(3) 57 #define LP872X_EN_LDO5_M BIT(4) 58 59 /* Mask/shift : LP8720 */ 60 #define LP8720_TIMESTEP_S 0 /* Addr 00h */ 61 #define LP8720_TIMESTEP_M BIT(0) 62 #define LP8720_EXT_DVS_M BIT(2) 63 #define LP8720_BUCK_FPWM_S 5 /* Addr 07h */ 64 #define LP8720_BUCK_FPWM_M BIT(5) 65 #define LP8720_EN_BUCK_M BIT(5) /* Addr 08h */ 66 #define LP8720_DVS_SEL_M BIT(7) 67 68 /* Mask/shift : LP8725 */ 69 #define LP8725_TIMESTEP_M 0xC0 /* Addr 00h */ 70 #define LP8725_TIMESTEP_S 6 71 #define LP8725_BUCK1_EN_M BIT(0) 72 #define LP8725_DVS1_M BIT(2) 73 #define LP8725_DVS2_M BIT(3) 74 #define LP8725_BUCK2_EN_M BIT(4) 75 #define LP8725_BUCK_CL_M 0xC0 /* Addr 09h, 0Bh */ 76 #define LP8725_BUCK_CL_S 6 77 #define LP8725_BUCK1_FPWM_S 1 /* Addr 0Ch */ 78 #define LP8725_BUCK1_FPWM_M BIT(1) 79 #define LP8725_BUCK2_FPWM_S 5 80 #define LP8725_BUCK2_FPWM_M BIT(5) 81 #define LP8725_EN_LILO1_M BIT(5) /* Addr 0Dh */ 82 #define LP8725_EN_LILO2_M BIT(6) 83 84 /* PWM mode */ 85 #define LP872X_FORCE_PWM 1 86 #define LP872X_AUTO_PWM 0 87 88 #define LP8720_NUM_REGULATORS 6 89 #define LP8725_NUM_REGULATORS 9 90 #define EXTERN_DVS_USED 0 91 #define MAX_DELAY 6 92 93 /* Default DVS Mode */ 94 #define LP8720_DEFAULT_DVS 0 95 #define LP8725_DEFAULT_DVS BIT(2) 96 97 /* dump registers in regmap-debugfs */ 98 #define MAX_REGISTERS 0x0F 99 100 enum lp872x_id { 101 LP8720, 102 LP8725, 103 }; 104 105 struct lp872x { 106 struct regmap *regmap; 107 struct device *dev; 108 enum lp872x_id chipid; 109 struct lp872x_platform_data *pdata; 110 int num_regulators; 111 enum lp872x_dvs_state dvs_pin; 112 }; 113 114 /* LP8720/LP8725 shared voltage table for LDOs */ 115 static const unsigned int lp872x_ldo_vtbl[] = { 116 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000, 117 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 2000000, 118 2100000, 2200000, 2300000, 2400000, 2500000, 2600000, 2650000, 2700000, 119 2750000, 2800000, 2850000, 2900000, 2950000, 3000000, 3100000, 3300000, 120 }; 121 122 /* LP8720 LDO4 voltage table */ 123 static const unsigned int lp8720_ldo4_vtbl[] = { 124 800000, 850000, 900000, 1000000, 1100000, 1200000, 1250000, 1300000, 125 1350000, 1400000, 1450000, 1500000, 1550000, 1600000, 1650000, 1700000, 126 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000, 127 2400000, 2500000, 2600000, 2650000, 2700000, 2750000, 2800000, 2850000, 128 }; 129 130 /* LP8725 LILO(Low Input Low Output) voltage table */ 131 static const unsigned int lp8725_lilo_vtbl[] = { 132 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, 133 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000, 134 1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000, 135 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000, 136 }; 137 138 /* LP8720 BUCK voltage table */ 139 #define EXT_R 0 /* external resistor divider */ 140 static const unsigned int lp8720_buck_vtbl[] = { 141 EXT_R, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 142 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 143 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 144 1950000, 2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 145 }; 146 147 /* LP8725 BUCK voltage table */ 148 static const unsigned int lp8725_buck_vtbl[] = { 149 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, 150 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1700000, 151 1750000, 1800000, 1850000, 1900000, 2000000, 2100000, 2200000, 2300000, 152 2400000, 2500000, 2600000, 2700000, 2800000, 2850000, 2900000, 3000000, 153 }; 154 155 /* LP8725 BUCK current limit */ 156 static const unsigned int lp8725_buck_uA[] = { 157 460000, 780000, 1050000, 1370000, 158 }; 159 160 static int lp872x_read_byte(struct lp872x *lp, u8 addr, u8 *data) 161 { 162 int ret; 163 unsigned int val; 164 165 ret = regmap_read(lp->regmap, addr, &val); 166 if (ret < 0) { 167 dev_err(lp->dev, "failed to read 0x%.2x\n", addr); 168 return ret; 169 } 170 171 *data = (u8)val; 172 return 0; 173 } 174 175 static inline int lp872x_write_byte(struct lp872x *lp, u8 addr, u8 data) 176 { 177 return regmap_write(lp->regmap, addr, data); 178 } 179 180 static inline int lp872x_update_bits(struct lp872x *lp, u8 addr, 181 unsigned int mask, u8 data) 182 { 183 return regmap_update_bits(lp->regmap, addr, mask, data); 184 } 185 186 static int lp872x_get_timestep_usec(struct lp872x *lp) 187 { 188 enum lp872x_id chip = lp->chipid; 189 u8 val, mask, shift; 190 int *time_usec, size, ret; 191 int lp8720_time_usec[] = { 25, 50 }; 192 int lp8725_time_usec[] = { 32, 64, 128, 256 }; 193 194 switch (chip) { 195 case LP8720: 196 mask = LP8720_TIMESTEP_M; 197 shift = LP8720_TIMESTEP_S; 198 time_usec = &lp8720_time_usec[0]; 199 size = ARRAY_SIZE(lp8720_time_usec); 200 break; 201 case LP8725: 202 mask = LP8725_TIMESTEP_M; 203 shift = LP8725_TIMESTEP_S; 204 time_usec = &lp8725_time_usec[0]; 205 size = ARRAY_SIZE(lp8725_time_usec); 206 break; 207 default: 208 return -EINVAL; 209 } 210 211 ret = lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val); 212 if (ret) 213 return ret; 214 215 val = (val & mask) >> shift; 216 if (val >= size) 217 return -EINVAL; 218 219 return *(time_usec + val); 220 } 221 222 static int lp872x_regulator_enable_time(struct regulator_dev *rdev) 223 { 224 struct lp872x *lp = rdev_get_drvdata(rdev); 225 enum lp872x_regulator_id rid = rdev_get_id(rdev); 226 int time_step_us = lp872x_get_timestep_usec(lp); 227 int ret; 228 u8 addr, val; 229 230 if (time_step_us < 0) 231 return time_step_us; 232 233 switch (rid) { 234 case LP8720_ID_LDO1 ... LP8720_ID_BUCK: 235 addr = LP872X_LDO1_VOUT + rid; 236 break; 237 case LP8725_ID_LDO1 ... LP8725_ID_BUCK1: 238 addr = LP872X_LDO1_VOUT + rid - LP8725_ID_BASE; 239 break; 240 case LP8725_ID_BUCK2: 241 addr = LP8725_BUCK2_VOUT1; 242 break; 243 default: 244 return -EINVAL; 245 } 246 247 ret = lp872x_read_byte(lp, addr, &val); 248 if (ret) 249 return ret; 250 251 val = (val & LP872X_START_DELAY_M) >> LP872X_START_DELAY_S; 252 253 return val > MAX_DELAY ? 0 : val * time_step_us; 254 } 255 256 static void lp872x_set_dvs(struct lp872x *lp, enum lp872x_dvs_sel dvs_sel, 257 int gpio) 258 { 259 enum lp872x_dvs_state state; 260 261 state = dvs_sel == SEL_V1 ? DVS_HIGH : DVS_LOW; 262 gpio_set_value(gpio, state); 263 lp->dvs_pin = state; 264 } 265 266 static u8 lp872x_select_buck_vout_addr(struct lp872x *lp, 267 enum lp872x_regulator_id buck) 268 { 269 u8 val, addr; 270 271 if (lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val)) 272 return 0; 273 274 switch (buck) { 275 case LP8720_ID_BUCK: 276 if (val & LP8720_EXT_DVS_M) { 277 addr = (lp->dvs_pin == DVS_HIGH) ? 278 LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2; 279 } else { 280 if (lp872x_read_byte(lp, LP8720_ENABLE, &val)) 281 return 0; 282 283 addr = val & LP8720_DVS_SEL_M ? 284 LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2; 285 } 286 break; 287 case LP8725_ID_BUCK1: 288 if (val & LP8725_DVS1_M) 289 addr = LP8725_BUCK1_VOUT1; 290 else 291 addr = (lp->dvs_pin == DVS_HIGH) ? 292 LP8725_BUCK1_VOUT1 : LP8725_BUCK1_VOUT2; 293 break; 294 case LP8725_ID_BUCK2: 295 addr = val & LP8725_DVS2_M ? 296 LP8725_BUCK2_VOUT1 : LP8725_BUCK2_VOUT2; 297 break; 298 default: 299 return 0; 300 } 301 302 return addr; 303 } 304 305 static bool lp872x_is_valid_buck_addr(u8 addr) 306 { 307 switch (addr) { 308 case LP8720_BUCK_VOUT1: 309 case LP8720_BUCK_VOUT2: 310 case LP8725_BUCK1_VOUT1: 311 case LP8725_BUCK1_VOUT2: 312 case LP8725_BUCK2_VOUT1: 313 case LP8725_BUCK2_VOUT2: 314 return true; 315 default: 316 return false; 317 } 318 } 319 320 static int lp872x_buck_set_voltage_sel(struct regulator_dev *rdev, 321 unsigned selector) 322 { 323 struct lp872x *lp = rdev_get_drvdata(rdev); 324 enum lp872x_regulator_id buck = rdev_get_id(rdev); 325 u8 addr, mask = LP872X_VOUT_M; 326 struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL; 327 328 if (dvs && gpio_is_valid(dvs->gpio)) 329 lp872x_set_dvs(lp, dvs->vsel, dvs->gpio); 330 331 addr = lp872x_select_buck_vout_addr(lp, buck); 332 if (!lp872x_is_valid_buck_addr(addr)) 333 return -EINVAL; 334 335 return lp872x_update_bits(lp, addr, mask, selector); 336 } 337 338 static int lp872x_buck_get_voltage_sel(struct regulator_dev *rdev) 339 { 340 struct lp872x *lp = rdev_get_drvdata(rdev); 341 enum lp872x_regulator_id buck = rdev_get_id(rdev); 342 u8 addr, val; 343 int ret; 344 345 addr = lp872x_select_buck_vout_addr(lp, buck); 346 if (!lp872x_is_valid_buck_addr(addr)) 347 return -EINVAL; 348 349 ret = lp872x_read_byte(lp, addr, &val); 350 if (ret) 351 return ret; 352 353 return val & LP872X_VOUT_M; 354 } 355 356 static int lp872x_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) 357 { 358 struct lp872x *lp = rdev_get_drvdata(rdev); 359 enum lp872x_regulator_id buck = rdev_get_id(rdev); 360 u8 addr, mask, shift, val; 361 362 switch (buck) { 363 case LP8720_ID_BUCK: 364 addr = LP8720_BUCK_VOUT2; 365 mask = LP8720_BUCK_FPWM_M; 366 shift = LP8720_BUCK_FPWM_S; 367 break; 368 case LP8725_ID_BUCK1: 369 addr = LP8725_BUCK_CTRL; 370 mask = LP8725_BUCK1_FPWM_M; 371 shift = LP8725_BUCK1_FPWM_S; 372 break; 373 case LP8725_ID_BUCK2: 374 addr = LP8725_BUCK_CTRL; 375 mask = LP8725_BUCK2_FPWM_M; 376 shift = LP8725_BUCK2_FPWM_S; 377 break; 378 default: 379 return -EINVAL; 380 } 381 382 if (mode == REGULATOR_MODE_FAST) 383 val = LP872X_FORCE_PWM << shift; 384 else if (mode == REGULATOR_MODE_NORMAL) 385 val = LP872X_AUTO_PWM << shift; 386 else 387 return -EINVAL; 388 389 return lp872x_update_bits(lp, addr, mask, val); 390 } 391 392 static unsigned int lp872x_buck_get_mode(struct regulator_dev *rdev) 393 { 394 struct lp872x *lp = rdev_get_drvdata(rdev); 395 enum lp872x_regulator_id buck = rdev_get_id(rdev); 396 u8 addr, mask, val; 397 int ret; 398 399 switch (buck) { 400 case LP8720_ID_BUCK: 401 addr = LP8720_BUCK_VOUT2; 402 mask = LP8720_BUCK_FPWM_M; 403 break; 404 case LP8725_ID_BUCK1: 405 addr = LP8725_BUCK_CTRL; 406 mask = LP8725_BUCK1_FPWM_M; 407 break; 408 case LP8725_ID_BUCK2: 409 addr = LP8725_BUCK_CTRL; 410 mask = LP8725_BUCK2_FPWM_M; 411 break; 412 default: 413 return -EINVAL; 414 } 415 416 ret = lp872x_read_byte(lp, addr, &val); 417 if (ret) 418 return ret; 419 420 return val & mask ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL; 421 } 422 423 static const struct regulator_ops lp872x_ldo_ops = { 424 .list_voltage = regulator_list_voltage_table, 425 .map_voltage = regulator_map_voltage_ascend, 426 .set_voltage_sel = regulator_set_voltage_sel_regmap, 427 .get_voltage_sel = regulator_get_voltage_sel_regmap, 428 .enable = regulator_enable_regmap, 429 .disable = regulator_disable_regmap, 430 .is_enabled = regulator_is_enabled_regmap, 431 .enable_time = lp872x_regulator_enable_time, 432 }; 433 434 static const struct regulator_ops lp8720_buck_ops = { 435 .list_voltage = regulator_list_voltage_table, 436 .map_voltage = regulator_map_voltage_ascend, 437 .set_voltage_sel = lp872x_buck_set_voltage_sel, 438 .get_voltage_sel = lp872x_buck_get_voltage_sel, 439 .enable = regulator_enable_regmap, 440 .disable = regulator_disable_regmap, 441 .is_enabled = regulator_is_enabled_regmap, 442 .enable_time = lp872x_regulator_enable_time, 443 .set_mode = lp872x_buck_set_mode, 444 .get_mode = lp872x_buck_get_mode, 445 }; 446 447 static const struct regulator_ops lp8725_buck_ops = { 448 .list_voltage = regulator_list_voltage_table, 449 .map_voltage = regulator_map_voltage_ascend, 450 .set_voltage_sel = lp872x_buck_set_voltage_sel, 451 .get_voltage_sel = lp872x_buck_get_voltage_sel, 452 .enable = regulator_enable_regmap, 453 .disable = regulator_disable_regmap, 454 .is_enabled = regulator_is_enabled_regmap, 455 .enable_time = lp872x_regulator_enable_time, 456 .set_mode = lp872x_buck_set_mode, 457 .get_mode = lp872x_buck_get_mode, 458 .set_current_limit = regulator_set_current_limit_regmap, 459 .get_current_limit = regulator_get_current_limit_regmap, 460 }; 461 462 static const struct regulator_desc lp8720_regulator_desc[] = { 463 { 464 .name = "ldo1", 465 .of_match = of_match_ptr("ldo1"), 466 .id = LP8720_ID_LDO1, 467 .ops = &lp872x_ldo_ops, 468 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 469 .volt_table = lp872x_ldo_vtbl, 470 .type = REGULATOR_VOLTAGE, 471 .owner = THIS_MODULE, 472 .vsel_reg = LP872X_LDO1_VOUT, 473 .vsel_mask = LP872X_VOUT_M, 474 .enable_reg = LP8720_ENABLE, 475 .enable_mask = LP872X_EN_LDO1_M, 476 }, 477 { 478 .name = "ldo2", 479 .of_match = of_match_ptr("ldo2"), 480 .id = LP8720_ID_LDO2, 481 .ops = &lp872x_ldo_ops, 482 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 483 .volt_table = lp872x_ldo_vtbl, 484 .type = REGULATOR_VOLTAGE, 485 .owner = THIS_MODULE, 486 .vsel_reg = LP872X_LDO2_VOUT, 487 .vsel_mask = LP872X_VOUT_M, 488 .enable_reg = LP8720_ENABLE, 489 .enable_mask = LP872X_EN_LDO2_M, 490 }, 491 { 492 .name = "ldo3", 493 .of_match = of_match_ptr("ldo3"), 494 .id = LP8720_ID_LDO3, 495 .ops = &lp872x_ldo_ops, 496 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 497 .volt_table = lp872x_ldo_vtbl, 498 .type = REGULATOR_VOLTAGE, 499 .owner = THIS_MODULE, 500 .vsel_reg = LP872X_LDO3_VOUT, 501 .vsel_mask = LP872X_VOUT_M, 502 .enable_reg = LP8720_ENABLE, 503 .enable_mask = LP872X_EN_LDO3_M, 504 }, 505 { 506 .name = "ldo4", 507 .of_match = of_match_ptr("ldo4"), 508 .id = LP8720_ID_LDO4, 509 .ops = &lp872x_ldo_ops, 510 .n_voltages = ARRAY_SIZE(lp8720_ldo4_vtbl), 511 .volt_table = lp8720_ldo4_vtbl, 512 .type = REGULATOR_VOLTAGE, 513 .owner = THIS_MODULE, 514 .vsel_reg = LP872X_LDO4_VOUT, 515 .vsel_mask = LP872X_VOUT_M, 516 .enable_reg = LP8720_ENABLE, 517 .enable_mask = LP872X_EN_LDO4_M, 518 }, 519 { 520 .name = "ldo5", 521 .of_match = of_match_ptr("ldo5"), 522 .id = LP8720_ID_LDO5, 523 .ops = &lp872x_ldo_ops, 524 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 525 .volt_table = lp872x_ldo_vtbl, 526 .type = REGULATOR_VOLTAGE, 527 .owner = THIS_MODULE, 528 .vsel_reg = LP872X_LDO5_VOUT, 529 .vsel_mask = LP872X_VOUT_M, 530 .enable_reg = LP8720_ENABLE, 531 .enable_mask = LP872X_EN_LDO5_M, 532 }, 533 { 534 .name = "buck", 535 .of_match = of_match_ptr("buck"), 536 .id = LP8720_ID_BUCK, 537 .ops = &lp8720_buck_ops, 538 .n_voltages = ARRAY_SIZE(lp8720_buck_vtbl), 539 .volt_table = lp8720_buck_vtbl, 540 .type = REGULATOR_VOLTAGE, 541 .owner = THIS_MODULE, 542 .enable_reg = LP8720_ENABLE, 543 .enable_mask = LP8720_EN_BUCK_M, 544 }, 545 }; 546 547 static const struct regulator_desc lp8725_regulator_desc[] = { 548 { 549 .name = "ldo1", 550 .of_match = of_match_ptr("ldo1"), 551 .id = LP8725_ID_LDO1, 552 .ops = &lp872x_ldo_ops, 553 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 554 .volt_table = lp872x_ldo_vtbl, 555 .type = REGULATOR_VOLTAGE, 556 .owner = THIS_MODULE, 557 .vsel_reg = LP872X_LDO1_VOUT, 558 .vsel_mask = LP872X_VOUT_M, 559 .enable_reg = LP8725_LDO_CTRL, 560 .enable_mask = LP872X_EN_LDO1_M, 561 }, 562 { 563 .name = "ldo2", 564 .of_match = of_match_ptr("ldo2"), 565 .id = LP8725_ID_LDO2, 566 .ops = &lp872x_ldo_ops, 567 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 568 .volt_table = lp872x_ldo_vtbl, 569 .type = REGULATOR_VOLTAGE, 570 .owner = THIS_MODULE, 571 .vsel_reg = LP872X_LDO2_VOUT, 572 .vsel_mask = LP872X_VOUT_M, 573 .enable_reg = LP8725_LDO_CTRL, 574 .enable_mask = LP872X_EN_LDO2_M, 575 }, 576 { 577 .name = "ldo3", 578 .of_match = of_match_ptr("ldo3"), 579 .id = LP8725_ID_LDO3, 580 .ops = &lp872x_ldo_ops, 581 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 582 .volt_table = lp872x_ldo_vtbl, 583 .type = REGULATOR_VOLTAGE, 584 .owner = THIS_MODULE, 585 .vsel_reg = LP872X_LDO3_VOUT, 586 .vsel_mask = LP872X_VOUT_M, 587 .enable_reg = LP8725_LDO_CTRL, 588 .enable_mask = LP872X_EN_LDO3_M, 589 }, 590 { 591 .name = "ldo4", 592 .of_match = of_match_ptr("ldo4"), 593 .id = LP8725_ID_LDO4, 594 .ops = &lp872x_ldo_ops, 595 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 596 .volt_table = lp872x_ldo_vtbl, 597 .type = REGULATOR_VOLTAGE, 598 .owner = THIS_MODULE, 599 .vsel_reg = LP872X_LDO4_VOUT, 600 .vsel_mask = LP872X_VOUT_M, 601 .enable_reg = LP8725_LDO_CTRL, 602 .enable_mask = LP872X_EN_LDO4_M, 603 }, 604 { 605 .name = "ldo5", 606 .of_match = of_match_ptr("ldo5"), 607 .id = LP8725_ID_LDO5, 608 .ops = &lp872x_ldo_ops, 609 .n_voltages = ARRAY_SIZE(lp872x_ldo_vtbl), 610 .volt_table = lp872x_ldo_vtbl, 611 .type = REGULATOR_VOLTAGE, 612 .owner = THIS_MODULE, 613 .vsel_reg = LP872X_LDO5_VOUT, 614 .vsel_mask = LP872X_VOUT_M, 615 .enable_reg = LP8725_LDO_CTRL, 616 .enable_mask = LP872X_EN_LDO5_M, 617 }, 618 { 619 .name = "lilo1", 620 .of_match = of_match_ptr("lilo1"), 621 .id = LP8725_ID_LILO1, 622 .ops = &lp872x_ldo_ops, 623 .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), 624 .volt_table = lp8725_lilo_vtbl, 625 .type = REGULATOR_VOLTAGE, 626 .owner = THIS_MODULE, 627 .vsel_reg = LP8725_LILO1_VOUT, 628 .vsel_mask = LP872X_VOUT_M, 629 .enable_reg = LP8725_LDO_CTRL, 630 .enable_mask = LP8725_EN_LILO1_M, 631 }, 632 { 633 .name = "lilo2", 634 .of_match = of_match_ptr("lilo2"), 635 .id = LP8725_ID_LILO2, 636 .ops = &lp872x_ldo_ops, 637 .n_voltages = ARRAY_SIZE(lp8725_lilo_vtbl), 638 .volt_table = lp8725_lilo_vtbl, 639 .type = REGULATOR_VOLTAGE, 640 .owner = THIS_MODULE, 641 .vsel_reg = LP8725_LILO2_VOUT, 642 .vsel_mask = LP872X_VOUT_M, 643 .enable_reg = LP8725_LDO_CTRL, 644 .enable_mask = LP8725_EN_LILO2_M, 645 }, 646 { 647 .name = "buck1", 648 .of_match = of_match_ptr("buck1"), 649 .id = LP8725_ID_BUCK1, 650 .ops = &lp8725_buck_ops, 651 .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl), 652 .volt_table = lp8725_buck_vtbl, 653 .type = REGULATOR_VOLTAGE, 654 .owner = THIS_MODULE, 655 .enable_reg = LP872X_GENERAL_CFG, 656 .enable_mask = LP8725_BUCK1_EN_M, 657 .curr_table = lp8725_buck_uA, 658 .n_current_limits = ARRAY_SIZE(lp8725_buck_uA), 659 .csel_reg = LP8725_BUCK1_VOUT2, 660 .csel_mask = LP8725_BUCK_CL_M, 661 }, 662 { 663 .name = "buck2", 664 .of_match = of_match_ptr("buck2"), 665 .id = LP8725_ID_BUCK2, 666 .ops = &lp8725_buck_ops, 667 .n_voltages = ARRAY_SIZE(lp8725_buck_vtbl), 668 .volt_table = lp8725_buck_vtbl, 669 .type = REGULATOR_VOLTAGE, 670 .owner = THIS_MODULE, 671 .enable_reg = LP872X_GENERAL_CFG, 672 .enable_mask = LP8725_BUCK2_EN_M, 673 .curr_table = lp8725_buck_uA, 674 .n_current_limits = ARRAY_SIZE(lp8725_buck_uA), 675 .csel_reg = LP8725_BUCK2_VOUT2, 676 .csel_mask = LP8725_BUCK_CL_M, 677 }, 678 }; 679 680 static int lp872x_init_dvs(struct lp872x *lp) 681 { 682 int ret, gpio; 683 struct lp872x_dvs *dvs = lp->pdata ? lp->pdata->dvs : NULL; 684 enum lp872x_dvs_state pinstate; 685 u8 mask[] = { LP8720_EXT_DVS_M, LP8725_DVS1_M | LP8725_DVS2_M }; 686 u8 default_dvs_mode[] = { LP8720_DEFAULT_DVS, LP8725_DEFAULT_DVS }; 687 688 if (!dvs) 689 goto set_default_dvs_mode; 690 691 gpio = dvs->gpio; 692 if (!gpio_is_valid(gpio)) 693 goto set_default_dvs_mode; 694 695 pinstate = dvs->init_state; 696 ret = devm_gpio_request_one(lp->dev, gpio, pinstate, "LP872X DVS"); 697 if (ret) { 698 dev_err(lp->dev, "gpio request err: %d\n", ret); 699 return ret; 700 } 701 702 lp->dvs_pin = pinstate; 703 704 return 0; 705 706 set_default_dvs_mode: 707 return lp872x_update_bits(lp, LP872X_GENERAL_CFG, mask[lp->chipid], 708 default_dvs_mode[lp->chipid]); 709 } 710 711 static int lp872x_hw_enable(struct lp872x *lp) 712 { 713 int ret, gpio; 714 715 if (!lp->pdata) 716 return -EINVAL; 717 718 gpio = lp->pdata->enable_gpio; 719 if (!gpio_is_valid(gpio)) 720 return 0; 721 722 /* Always set enable GPIO high. */ 723 ret = devm_gpio_request_one(lp->dev, gpio, GPIOF_OUT_INIT_HIGH, "LP872X EN"); 724 if (ret) { 725 dev_err(lp->dev, "gpio request err: %d\n", ret); 726 return ret; 727 } 728 729 /* Each chip has a different enable delay. */ 730 if (lp->chipid == LP8720) 731 usleep_range(LP8720_ENABLE_DELAY, 1.5 * LP8720_ENABLE_DELAY); 732 else 733 usleep_range(LP8725_ENABLE_DELAY, 1.5 * LP8725_ENABLE_DELAY); 734 735 return 0; 736 } 737 738 static int lp872x_config(struct lp872x *lp) 739 { 740 struct lp872x_platform_data *pdata = lp->pdata; 741 int ret; 742 743 if (!pdata || !pdata->update_config) 744 goto init_dvs; 745 746 ret = lp872x_write_byte(lp, LP872X_GENERAL_CFG, pdata->general_config); 747 if (ret) 748 return ret; 749 750 init_dvs: 751 return lp872x_init_dvs(lp); 752 } 753 754 static struct regulator_init_data 755 *lp872x_find_regulator_init_data(int id, struct lp872x *lp) 756 { 757 struct lp872x_platform_data *pdata = lp->pdata; 758 int i; 759 760 if (!pdata) 761 return NULL; 762 763 for (i = 0; i < lp->num_regulators; i++) { 764 if (pdata->regulator_data[i].id == id) 765 return pdata->regulator_data[i].init_data; 766 } 767 768 return NULL; 769 } 770 771 static int lp872x_regulator_register(struct lp872x *lp) 772 { 773 const struct regulator_desc *desc; 774 struct regulator_config cfg = { }; 775 struct regulator_dev *rdev; 776 int i; 777 778 for (i = 0; i < lp->num_regulators; i++) { 779 desc = (lp->chipid == LP8720) ? &lp8720_regulator_desc[i] : 780 &lp8725_regulator_desc[i]; 781 782 cfg.dev = lp->dev; 783 cfg.init_data = lp872x_find_regulator_init_data(desc->id, lp); 784 cfg.driver_data = lp; 785 cfg.regmap = lp->regmap; 786 787 rdev = devm_regulator_register(lp->dev, desc, &cfg); 788 if (IS_ERR(rdev)) { 789 dev_err(lp->dev, "regulator register err"); 790 return PTR_ERR(rdev); 791 } 792 } 793 794 return 0; 795 } 796 797 static const struct regmap_config lp872x_regmap_config = { 798 .reg_bits = 8, 799 .val_bits = 8, 800 .max_register = MAX_REGISTERS, 801 }; 802 803 #ifdef CONFIG_OF 804 805 #define LP872X_VALID_OPMODE (REGULATOR_MODE_FAST | REGULATOR_MODE_NORMAL) 806 807 static struct of_regulator_match lp8720_matches[] = { 808 { .name = "ldo1", .driver_data = (void *)LP8720_ID_LDO1, }, 809 { .name = "ldo2", .driver_data = (void *)LP8720_ID_LDO2, }, 810 { .name = "ldo3", .driver_data = (void *)LP8720_ID_LDO3, }, 811 { .name = "ldo4", .driver_data = (void *)LP8720_ID_LDO4, }, 812 { .name = "ldo5", .driver_data = (void *)LP8720_ID_LDO5, }, 813 { .name = "buck", .driver_data = (void *)LP8720_ID_BUCK, }, 814 }; 815 816 static struct of_regulator_match lp8725_matches[] = { 817 { .name = "ldo1", .driver_data = (void *)LP8725_ID_LDO1, }, 818 { .name = "ldo2", .driver_data = (void *)LP8725_ID_LDO2, }, 819 { .name = "ldo3", .driver_data = (void *)LP8725_ID_LDO3, }, 820 { .name = "ldo4", .driver_data = (void *)LP8725_ID_LDO4, }, 821 { .name = "ldo5", .driver_data = (void *)LP8725_ID_LDO5, }, 822 { .name = "lilo1", .driver_data = (void *)LP8725_ID_LILO1, }, 823 { .name = "lilo2", .driver_data = (void *)LP8725_ID_LILO2, }, 824 { .name = "buck1", .driver_data = (void *)LP8725_ID_BUCK1, }, 825 { .name = "buck2", .driver_data = (void *)LP8725_ID_BUCK2, }, 826 }; 827 828 static struct lp872x_platform_data 829 *lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which) 830 { 831 struct device_node *np = dev->of_node; 832 struct lp872x_platform_data *pdata; 833 struct of_regulator_match *match; 834 int num_matches; 835 int count; 836 int i; 837 u8 dvs_state; 838 839 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); 840 if (!pdata) 841 return ERR_PTR(-ENOMEM); 842 843 of_property_read_u8(np, "ti,general-config", &pdata->general_config); 844 if (of_find_property(np, "ti,update-config", NULL)) 845 pdata->update_config = true; 846 847 pdata->dvs = devm_kzalloc(dev, sizeof(struct lp872x_dvs), GFP_KERNEL); 848 if (!pdata->dvs) 849 return ERR_PTR(-ENOMEM); 850 851 pdata->dvs->gpio = of_get_named_gpio(np, "ti,dvs-gpio", 0); 852 of_property_read_u8(np, "ti,dvs-vsel", (u8 *)&pdata->dvs->vsel); 853 of_property_read_u8(np, "ti,dvs-state", &dvs_state); 854 pdata->dvs->init_state = dvs_state ? DVS_HIGH : DVS_LOW; 855 856 pdata->enable_gpio = of_get_named_gpio(np, "enable-gpios", 0); 857 858 if (of_get_child_count(np) == 0) 859 goto out; 860 861 switch (which) { 862 case LP8720: 863 match = lp8720_matches; 864 num_matches = ARRAY_SIZE(lp8720_matches); 865 break; 866 case LP8725: 867 match = lp8725_matches; 868 num_matches = ARRAY_SIZE(lp8725_matches); 869 break; 870 default: 871 goto out; 872 } 873 874 count = of_regulator_match(dev, np, match, num_matches); 875 if (count <= 0) 876 goto out; 877 878 for (i = 0; i < num_matches; i++) { 879 pdata->regulator_data[i].id = 880 (enum lp872x_regulator_id)match[i].driver_data; 881 pdata->regulator_data[i].init_data = match[i].init_data; 882 } 883 out: 884 return pdata; 885 } 886 #else 887 static struct lp872x_platform_data 888 *lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which) 889 { 890 return NULL; 891 } 892 #endif 893 894 static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id) 895 { 896 struct lp872x *lp; 897 struct lp872x_platform_data *pdata; 898 int ret; 899 const int lp872x_num_regulators[] = { 900 [LP8720] = LP8720_NUM_REGULATORS, 901 [LP8725] = LP8725_NUM_REGULATORS, 902 }; 903 904 if (cl->dev.of_node) { 905 pdata = lp872x_populate_pdata_from_dt(&cl->dev, 906 (enum lp872x_id)id->driver_data); 907 if (IS_ERR(pdata)) 908 return PTR_ERR(pdata); 909 } else { 910 pdata = dev_get_platdata(&cl->dev); 911 } 912 913 lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL); 914 if (!lp) 915 return -ENOMEM; 916 917 lp->num_regulators = lp872x_num_regulators[id->driver_data]; 918 919 lp->regmap = devm_regmap_init_i2c(cl, &lp872x_regmap_config); 920 if (IS_ERR(lp->regmap)) { 921 ret = PTR_ERR(lp->regmap); 922 dev_err(&cl->dev, "regmap init i2c err: %d\n", ret); 923 return ret; 924 } 925 926 lp->dev = &cl->dev; 927 lp->pdata = pdata; 928 lp->chipid = id->driver_data; 929 i2c_set_clientdata(cl, lp); 930 931 ret = lp872x_hw_enable(lp); 932 if (ret) 933 return ret; 934 935 ret = lp872x_config(lp); 936 if (ret) 937 return ret; 938 939 return lp872x_regulator_register(lp); 940 } 941 942 static const struct of_device_id lp872x_dt_ids[] = { 943 { .compatible = "ti,lp8720", }, 944 { .compatible = "ti,lp8725", }, 945 { } 946 }; 947 MODULE_DEVICE_TABLE(of, lp872x_dt_ids); 948 949 static const struct i2c_device_id lp872x_ids[] = { 950 {"lp8720", LP8720}, 951 {"lp8725", LP8725}, 952 { } 953 }; 954 MODULE_DEVICE_TABLE(i2c, lp872x_ids); 955 956 static struct i2c_driver lp872x_driver = { 957 .driver = { 958 .name = "lp872x", 959 .of_match_table = of_match_ptr(lp872x_dt_ids), 960 }, 961 .probe = lp872x_probe, 962 .id_table = lp872x_ids, 963 }; 964 965 module_i2c_driver(lp872x_driver); 966 967 MODULE_DESCRIPTION("TI/National Semiconductor LP872x PMU Regulator Driver"); 968 MODULE_AUTHOR("Milo Kim"); 969 MODULE_LICENSE("GPL"); 970