drivers/regulator/lp8788-ldo.c

   1 /*
   2  * TI LP8788 MFD - ldo regulator driver
   3  *
   4  * Copyright 2012 Texas Instruments
   5  *
   6  * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/slab.h>
  16 #include <linux/err.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/regulator/driver.h>
  19 #include <linux/gpio.h>
  20 #include <linux/mfd/lp8788.h>
  21
  22 /* register address */
  23 #define LP8788_EN_LDO_A                 0x0D    /* DLDO 1 ~ 8 */
  24 #define LP8788_EN_LDO_B                 0x0E    /* DLDO 9 ~ 12, ALDO 1 ~ 4 */
  25 #define LP8788_EN_LDO_C                 0x0F    /* ALDO 5 ~ 10 */
  26 #define LP8788_EN_SEL                   0x10
  27 #define LP8788_DLDO1_VOUT               0x2E
  28 #define LP8788_DLDO2_VOUT               0x2F
  29 #define LP8788_DLDO3_VOUT               0x30
  30 #define LP8788_DLDO4_VOUT               0x31
  31 #define LP8788_DLDO5_VOUT               0x32
  32 #define LP8788_DLDO6_VOUT               0x33
  33 #define LP8788_DLDO7_VOUT               0x34
  34 #define LP8788_DLDO8_VOUT               0x35
  35 #define LP8788_DLDO9_VOUT               0x36
  36 #define LP8788_DLDO10_VOUT              0x37
  37 #define LP8788_DLDO11_VOUT              0x38
  38 #define LP8788_DLDO12_VOUT              0x39
  39 #define LP8788_ALDO1_VOUT               0x3A
  40 #define LP8788_ALDO2_VOUT               0x3B
  41 #define LP8788_ALDO3_VOUT               0x3C
  42 #define LP8788_ALDO4_VOUT               0x3D
  43 #define LP8788_ALDO5_VOUT               0x3E
  44 #define LP8788_ALDO6_VOUT               0x3F
  45 #define LP8788_ALDO7_VOUT               0x40
  46 #define LP8788_ALDO8_VOUT               0x41
  47 #define LP8788_ALDO9_VOUT               0x42
  48 #define LP8788_ALDO10_VOUT              0x43
  49 #define LP8788_DLDO1_TIMESTEP           0x44
  50
  51 /* mask/shift bits */
  52 #define LP8788_EN_DLDO1_M               BIT(0)  /* Addr 0Dh ~ 0Fh */
  53 #define LP8788_EN_DLDO2_M               BIT(1)
  54 #define LP8788_EN_DLDO3_M               BIT(2)
  55 #define LP8788_EN_DLDO4_M               BIT(3)
  56 #define LP8788_EN_DLDO5_M               BIT(4)
  57 #define LP8788_EN_DLDO6_M               BIT(5)
  58 #define LP8788_EN_DLDO7_M               BIT(6)
  59 #define LP8788_EN_DLDO8_M               BIT(7)
  60 #define LP8788_EN_DLDO9_M               BIT(0)
  61 #define LP8788_EN_DLDO10_M              BIT(1)
  62 #define LP8788_EN_DLDO11_M              BIT(2)
  63 #define LP8788_EN_DLDO12_M              BIT(3)
  64 #define LP8788_EN_ALDO1_M               BIT(4)
  65 #define LP8788_EN_ALDO2_M               BIT(5)
  66 #define LP8788_EN_ALDO3_M               BIT(6)
  67 #define LP8788_EN_ALDO4_M               BIT(7)
  68 #define LP8788_EN_ALDO5_M               BIT(0)
  69 #define LP8788_EN_ALDO6_M               BIT(1)
  70 #define LP8788_EN_ALDO7_M               BIT(2)
  71 #define LP8788_EN_ALDO8_M               BIT(3)
  72 #define LP8788_EN_ALDO9_M               BIT(4)
  73 #define LP8788_EN_ALDO10_M              BIT(5)
  74 #define LP8788_EN_SEL_DLDO911_M         BIT(0)  /* Addr 10h */
  75 #define LP8788_EN_SEL_DLDO7_M           BIT(1)
  76 #define LP8788_EN_SEL_ALDO7_M           BIT(2)
  77 #define LP8788_EN_SEL_ALDO5_M           BIT(3)
  78 #define LP8788_EN_SEL_ALDO234_M         BIT(4)
  79 #define LP8788_EN_SEL_ALDO1_M           BIT(5)
  80 #define LP8788_VOUT_5BIT_M              0x1F    /* Addr 2Eh ~ 43h */
  81 #define LP8788_VOUT_4BIT_M              0x0F
  82 #define LP8788_VOUT_3BIT_M              0x07
  83 #define LP8788_VOUT_1BIT_M              0x01
  84 #define LP8788_STARTUP_TIME_M           0xF8    /* Addr 44h ~ 59h */
  85 #define LP8788_STARTUP_TIME_S           3
  86
  87 #define ENABLE_TIME_USEC                32
  88 #define ENABLE                          GPIOF_OUT_INIT_HIGH
  89 #define DISABLE                         GPIOF_OUT_INIT_LOW
  90
  91 enum lp8788_ldo_id {
  92         DLDO1,
  93         DLDO2,
  94         DLDO3,
  95         DLDO4,
  96         DLDO5,
  97         DLDO6,
  98         DLDO7,
  99         DLDO8,
 100         DLDO9,
 101         DLDO10,
 102         DLDO11,
 103         DLDO12,
 104         ALDO1,
 105         ALDO2,
 106         ALDO3,
 107         ALDO4,
 108         ALDO5,
 109         ALDO6,
 110         ALDO7,
 111         ALDO8,
 112         ALDO9,
 113         ALDO10,
 114 };
 115
 116 struct lp8788_ldo {
 117         struct lp8788 *lp;
 118         struct regulator_desc *desc;
 119         struct regulator_dev *regulator;
 120         struct lp8788_ldo_enable_pin *en_pin;
 121 };
 122
 123 /* DLDO 1, 2, 3, 9 voltage table */
 124 static const int lp8788_dldo1239_vtbl[] = {
 125         1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000,
 126         2600000, 2700000, 2800000, 2900000, 3000000, 2850000, 2850000, 2850000,
 127         2850000, 2850000, 2850000, 2850000, 2850000, 2850000, 2850000, 2850000,
 128         2850000, 2850000, 2850000, 2850000, 2850000, 2850000, 2850000, 2850000,
 129 };
 130
 131 /* DLDO 4 voltage table */
 132 static const int lp8788_dldo4_vtbl[] = { 1800000, 3000000 };
 133
 134 /* DLDO 5, 7, 8 and ALDO 6 voltage table */
 135 static const int lp8788_dldo578_aldo6_vtbl[] = {
 136         1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000,
 137         2600000, 2700000, 2800000, 2900000, 3000000, 3000000, 3000000, 3000000,
 138 };
 139
 140 /* DLDO 6 voltage table */
 141 static const int lp8788_dldo6_vtbl[] = {
 142         3000000, 3100000, 3200000, 3300000, 3400000, 3500000, 3600000, 3600000,
 143 };
 144
 145 /* DLDO 10, 11 voltage table */
 146 static const int lp8788_dldo1011_vtbl[] = {
 147         1100000, 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000,
 148         1500000, 1500000, 1500000, 1500000, 1500000, 1500000, 1500000, 1500000,
 149 };
 150
 151 /* ALDO 1 voltage table */
 152 static const int lp8788_aldo1_vtbl[] = { 1800000, 2850000 };
 153
 154 /* ALDO 7 voltage table */
 155 static const int lp8788_aldo7_vtbl[] = {
 156         1200000, 1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1800000,
 157 };
 158
 159 static enum lp8788_ldo_id lp8788_dldo_id[] = {
 160         DLDO1,
 161         DLDO2,
 162         DLDO3,
 163         DLDO4,
 164         DLDO5,
 165         DLDO6,
 166         DLDO7,
 167         DLDO8,
 168         DLDO9,
 169         DLDO10,
 170         DLDO11,
 171         DLDO12,
 172 };
 173
 174 static enum lp8788_ldo_id lp8788_aldo_id[] = {
 175         ALDO1,
 176         ALDO2,
 177         ALDO3,
 178         ALDO4,
 179         ALDO5,
 180         ALDO6,
 181         ALDO7,
 182         ALDO8,
 183         ALDO9,
 184         ALDO10,
 185 };
 186
 187 static int lp8788_ldo_enable(struct regulator_dev *rdev)
 188 {
 189         struct lp8788_ldo *ldo = rdev_get_drvdata(rdev);
 190
 191         if (ldo->en_pin) {
 192                 gpio_set_value(ldo->en_pin->gpio, ENABLE);
 193                 return 0;
 194         } else {
 195                 return regulator_enable_regmap(rdev);
 196         }
 197 }
 198
 199 static int lp8788_ldo_disable(struct regulator_dev *rdev)
 200 {
 201         struct lp8788_ldo *ldo = rdev_get_drvdata(rdev);
 202
 203         if (ldo->en_pin) {
 204                 gpio_set_value(ldo->en_pin->gpio, DISABLE);
 205                 return 0;
 206         } else {
 207                 return regulator_disable_regmap(rdev);
 208         }
 209 }
 210
 211 static int lp8788_ldo_is_enabled(struct regulator_dev *rdev)
 212 {
 213         struct lp8788_ldo *ldo = rdev_get_drvdata(rdev);
 214
 215         if (ldo->en_pin)
 216                 return gpio_get_value(ldo->en_pin->gpio) ? 1 : 0;
 217         else
 218                 return regulator_is_enabled_regmap(rdev);
 219 }
 220
 221 static int lp8788_ldo_enable_time(struct regulator_dev *rdev)
 222 {
 223         struct lp8788_ldo *ldo = rdev_get_drvdata(rdev);
 224         enum lp8788_ldo_id id = rdev_get_id(rdev);
 225         u8 val, addr = LP8788_DLDO1_TIMESTEP + id;
 226
 227         if (lp8788_read_byte(ldo->lp, addr, &val))
 228                 return -EINVAL;
 229
 230         val = (val & LP8788_STARTUP_TIME_M) >> LP8788_STARTUP_TIME_S;
 231
 232         return ENABLE_TIME_USEC * val;
 233 }
 234
 235 static int lp8788_ldo_fixed_get_voltage(struct regulator_dev *rdev)
 236 {
 237         enum lp8788_ldo_id id = rdev_get_id(rdev);
 238
 239         switch (id) {
 240         case ALDO2 ... ALDO5:
 241                 return 2850000;
 242         case DLDO12:
 243         case ALDO8 ... ALDO9:
 244                 return 2500000;
 245         case ALDO10:
 246                 return 1100000;
 247         default:
 248                 return -EINVAL;
 249         }
 250 }
 251
 252 static struct regulator_ops lp8788_ldo_voltage_table_ops = {
 253         .list_voltage = regulator_list_voltage_table,
 254         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 255         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 256         .enable = lp8788_ldo_enable,
 257         .disable = lp8788_ldo_disable,
 258         .is_enabled = lp8788_ldo_is_enabled,
 259         .enable_time = lp8788_ldo_enable_time,
 260 };
 261
 262 static struct regulator_ops lp8788_ldo_voltage_fixed_ops = {
 263         .get_voltage = lp8788_ldo_fixed_get_voltage,
 264         .enable = lp8788_ldo_enable,
 265         .disable = lp8788_ldo_disable,
 266         .is_enabled = lp8788_ldo_is_enabled,
 267         .enable_time = lp8788_ldo_enable_time,
 268 };
 269
 270 static struct regulator_desc lp8788_dldo_desc[] = {
 271         {
 272                 .name = "dldo1",
 273                 .id = DLDO1,
 274                 .ops = &lp8788_ldo_voltage_table_ops,
 275                 .n_voltages = ARRAY_SIZE(lp8788_dldo1239_vtbl),
 276                 .volt_table = lp8788_dldo1239_vtbl,
 277                 .type = REGULATOR_VOLTAGE,
 278                 .owner = THIS_MODULE,
 279                 .vsel_reg = LP8788_DLDO1_VOUT,
 280                 .vsel_mask = LP8788_VOUT_5BIT_M,
 281                 .enable_reg = LP8788_EN_LDO_A,
 282                 .enable_mask = LP8788_EN_DLDO1_M,
 283         },
 284         {
 285                 .name = "dldo2",
 286                 .id = DLDO2,
 287                 .ops = &lp8788_ldo_voltage_table_ops,
 288                 .n_voltages = ARRAY_SIZE(lp8788_dldo1239_vtbl),
 289                 .volt_table = lp8788_dldo1239_vtbl,
 290                 .type = REGULATOR_VOLTAGE,
 291                 .owner = THIS_MODULE,
 292                 .vsel_reg = LP8788_DLDO2_VOUT,
 293                 .vsel_mask = LP8788_VOUT_5BIT_M,
 294                 .enable_reg = LP8788_EN_LDO_A,
 295                 .enable_mask = LP8788_EN_DLDO2_M,
 296         },
 297         {
 298                 .name = "dldo3",
 299                 .id = DLDO3,
 300                 .ops = &lp8788_ldo_voltage_table_ops,
 301                 .n_voltages = ARRAY_SIZE(lp8788_dldo1239_vtbl),
 302                 .volt_table = lp8788_dldo1239_vtbl,
 303                 .type = REGULATOR_VOLTAGE,
 304                 .owner = THIS_MODULE,
 305                 .vsel_reg = LP8788_DLDO3_VOUT,
 306                 .vsel_mask = LP8788_VOUT_5BIT_M,
 307                 .enable_reg = LP8788_EN_LDO_A,
 308                 .enable_mask = LP8788_EN_DLDO3_M,
 309         },
 310         {
 311                 .name = "dldo4",
 312                 .id = DLDO4,
 313                 .ops = &lp8788_ldo_voltage_table_ops,
 314                 .n_voltages = ARRAY_SIZE(lp8788_dldo4_vtbl),
 315                 .volt_table = lp8788_dldo4_vtbl,
 316                 .type = REGULATOR_VOLTAGE,
 317                 .owner = THIS_MODULE,
 318                 .vsel_reg = LP8788_DLDO4_VOUT,
 319                 .vsel_mask = LP8788_VOUT_1BIT_M,
 320                 .enable_reg = LP8788_EN_LDO_A,
 321                 .enable_mask = LP8788_EN_DLDO4_M,
 322         },
 323         {
 324                 .name = "dldo5",
 325                 .id = DLDO5,
 326                 .ops = &lp8788_ldo_voltage_table_ops,
 327                 .n_voltages = ARRAY_SIZE(lp8788_dldo578_aldo6_vtbl),
 328                 .volt_table = lp8788_dldo578_aldo6_vtbl,
 329                 .type = REGULATOR_VOLTAGE,
 330                 .owner = THIS_MODULE,
 331                 .vsel_reg = LP8788_DLDO5_VOUT,
 332                 .vsel_mask = LP8788_VOUT_4BIT_M,
 333                 .enable_reg = LP8788_EN_LDO_A,
 334                 .enable_mask = LP8788_EN_DLDO5_M,
 335         },
 336         {
 337                 .name = "dldo6",
 338                 .id = DLDO6,
 339                 .ops = &lp8788_ldo_voltage_table_ops,
 340                 .n_voltages = ARRAY_SIZE(lp8788_dldo6_vtbl),
 341                 .volt_table = lp8788_dldo6_vtbl,
 342                 .type = REGULATOR_VOLTAGE,
 343                 .owner = THIS_MODULE,
 344                 .vsel_reg = LP8788_DLDO6_VOUT,
 345                 .vsel_mask = LP8788_VOUT_3BIT_M,
 346                 .enable_reg = LP8788_EN_LDO_A,
 347                 .enable_mask = LP8788_EN_DLDO6_M,
 348         },
 349         {
 350                 .name = "dldo7",
 351                 .id = DLDO7,
 352                 .ops = &lp8788_ldo_voltage_table_ops,
 353                 .n_voltages = ARRAY_SIZE(lp8788_dldo578_aldo6_vtbl),
 354                 .volt_table = lp8788_dldo578_aldo6_vtbl,
 355                 .type = REGULATOR_VOLTAGE,
 356                 .owner = THIS_MODULE,
 357                 .vsel_reg = LP8788_DLDO7_VOUT,
 358                 .vsel_mask = LP8788_VOUT_4BIT_M,
 359                 .enable_reg = LP8788_EN_LDO_A,
 360                 .enable_mask = LP8788_EN_DLDO7_M,
 361         },
 362         {
 363                 .name = "dldo8",
 364                 .id = DLDO8,
 365                 .ops = &lp8788_ldo_voltage_table_ops,
 366                 .n_voltages = ARRAY_SIZE(lp8788_dldo578_aldo6_vtbl),
 367                 .volt_table = lp8788_dldo578_aldo6_vtbl,
 368                 .type = REGULATOR_VOLTAGE,
 369                 .owner = THIS_MODULE,
 370                 .vsel_reg = LP8788_DLDO8_VOUT,
 371                 .vsel_mask = LP8788_VOUT_4BIT_M,
 372                 .enable_reg = LP8788_EN_LDO_A,
 373                 .enable_mask = LP8788_EN_DLDO8_M,
 374         },
 375         {
 376                 .name = "dldo9",
 377                 .id = DLDO9,
 378                 .ops = &lp8788_ldo_voltage_table_ops,
 379                 .n_voltages = ARRAY_SIZE(lp8788_dldo1239_vtbl),
 380                 .volt_table = lp8788_dldo1239_vtbl,
 381                 .type = REGULATOR_VOLTAGE,
 382                 .owner = THIS_MODULE,
 383                 .vsel_reg = LP8788_DLDO9_VOUT,
 384                 .vsel_mask = LP8788_VOUT_5BIT_M,
 385                 .enable_reg = LP8788_EN_LDO_B,
 386                 .enable_mask = LP8788_EN_DLDO9_M,
 387         },
 388         {
 389                 .name = "dldo10",
 390                 .id = DLDO10,
 391                 .ops = &lp8788_ldo_voltage_table_ops,
 392                 .n_voltages = ARRAY_SIZE(lp8788_dldo1011_vtbl),
 393                 .volt_table = lp8788_dldo1011_vtbl,
 394                 .type = REGULATOR_VOLTAGE,
 395                 .owner = THIS_MODULE,
 396                 .vsel_reg = LP8788_DLDO10_VOUT,
 397                 .vsel_mask = LP8788_VOUT_4BIT_M,
 398                 .enable_reg = LP8788_EN_LDO_B,
 399                 .enable_mask = LP8788_EN_DLDO10_M,
 400         },
 401         {
 402                 .name = "dldo11",
 403                 .id = DLDO11,
 404                 .ops = &lp8788_ldo_voltage_table_ops,
 405                 .n_voltages = ARRAY_SIZE(lp8788_dldo1011_vtbl),
 406                 .volt_table = lp8788_dldo1011_vtbl,
 407                 .type = REGULATOR_VOLTAGE,
 408                 .owner = THIS_MODULE,
 409                 .vsel_reg = LP8788_DLDO11_VOUT,
 410                 .vsel_mask = LP8788_VOUT_4BIT_M,
 411                 .enable_reg = LP8788_EN_LDO_B,
 412                 .enable_mask = LP8788_EN_DLDO11_M,
 413         },
 414         {
 415                 .name = "dldo12",
 416                 .id = DLDO12,
 417                 .ops = &lp8788_ldo_voltage_fixed_ops,
 418                 .n_voltages = 1,
 419                 .type = REGULATOR_VOLTAGE,
 420                 .owner = THIS_MODULE,
 421                 .enable_reg = LP8788_EN_LDO_B,
 422                 .enable_mask = LP8788_EN_DLDO12_M,
 423         },
 424 };
 425
 426 static struct regulator_desc lp8788_aldo_desc[] = {
 427         {
 428                 .name = "aldo1",
 429                 .id = ALDO1,
 430                 .ops = &lp8788_ldo_voltage_table_ops,
 431                 .n_voltages = ARRAY_SIZE(lp8788_aldo1_vtbl),
 432                 .volt_table = lp8788_aldo1_vtbl,
 433                 .type = REGULATOR_VOLTAGE,
 434                 .owner = THIS_MODULE,
 435                 .vsel_reg = LP8788_ALDO1_VOUT,
 436                 .vsel_mask = LP8788_VOUT_1BIT_M,
 437                 .enable_reg = LP8788_EN_LDO_B,
 438                 .enable_mask = LP8788_EN_ALDO1_M,
 439         },
 440         {
 441                 .name = "aldo2",
 442                 .id = ALDO2,
 443                 .ops = &lp8788_ldo_voltage_fixed_ops,
 444                 .n_voltages = 1,
 445                 .type = REGULATOR_VOLTAGE,
 446                 .owner = THIS_MODULE,
 447                 .enable_reg = LP8788_EN_LDO_B,
 448                 .enable_mask = LP8788_EN_ALDO2_M,
 449         },
 450         {
 451                 .name = "aldo3",
 452                 .id = ALDO3,
 453                 .ops = &lp8788_ldo_voltage_fixed_ops,
 454                 .n_voltages = 1,
 455                 .type = REGULATOR_VOLTAGE,
 456                 .owner = THIS_MODULE,
 457                 .enable_reg = LP8788_EN_LDO_B,
 458                 .enable_mask = LP8788_EN_ALDO3_M,
 459         },
 460         {
 461                 .name = "aldo4",
 462                 .id = ALDO4,
 463                 .ops = &lp8788_ldo_voltage_fixed_ops,
 464                 .n_voltages = 1,
 465                 .type = REGULATOR_VOLTAGE,
 466                 .owner = THIS_MODULE,
 467                 .enable_reg = LP8788_EN_LDO_B,
 468                 .enable_mask = LP8788_EN_ALDO4_M,
 469         },
 470         {
 471                 .name = "aldo5",
 472                 .id = ALDO5,
 473                 .ops = &lp8788_ldo_voltage_fixed_ops,
 474                 .n_voltages = 1,
 475                 .type = REGULATOR_VOLTAGE,
 476                 .owner = THIS_MODULE,
 477                 .enable_reg = LP8788_EN_LDO_C,
 478                 .enable_mask = LP8788_EN_ALDO5_M,
 479         },
 480         {
 481                 .name = "aldo6",
 482                 .id = ALDO6,
 483                 .ops = &lp8788_ldo_voltage_table_ops,
 484                 .n_voltages = ARRAY_SIZE(lp8788_dldo578_aldo6_vtbl),
 485                 .volt_table = lp8788_dldo578_aldo6_vtbl,
 486                 .type = REGULATOR_VOLTAGE,
 487                 .owner = THIS_MODULE,
 488                 .vsel_reg = LP8788_ALDO6_VOUT,
 489                 .vsel_mask = LP8788_VOUT_4BIT_M,
 490                 .enable_reg = LP8788_EN_LDO_C,
 491                 .enable_mask = LP8788_EN_ALDO6_M,
 492         },
 493         {
 494                 .name = "aldo7",
 495                 .id = ALDO7,
 496                 .ops = &lp8788_ldo_voltage_table_ops,
 497                 .n_voltages = ARRAY_SIZE(lp8788_aldo7_vtbl),
 498                 .volt_table = lp8788_aldo7_vtbl,
 499                 .type = REGULATOR_VOLTAGE,
 500                 .owner = THIS_MODULE,
 501                 .vsel_reg = LP8788_ALDO7_VOUT,
 502                 .vsel_mask = LP8788_VOUT_3BIT_M,
 503                 .enable_reg = LP8788_EN_LDO_C,
 504                 .enable_mask = LP8788_EN_ALDO7_M,
 505         },
 506         {
 507                 .name = "aldo8",
 508                 .id = ALDO8,
 509                 .ops = &lp8788_ldo_voltage_fixed_ops,
 510                 .n_voltages = 1,
 511                 .type = REGULATOR_VOLTAGE,
 512                 .owner = THIS_MODULE,
 513                 .enable_reg = LP8788_EN_LDO_C,
 514                 .enable_mask = LP8788_EN_ALDO8_M,
 515         },
 516         {
 517                 .name = "aldo9",
 518                 .id = ALDO9,
 519                 .ops = &lp8788_ldo_voltage_fixed_ops,
 520                 .n_voltages = 1,
 521                 .type = REGULATOR_VOLTAGE,
 522                 .owner = THIS_MODULE,
 523                 .enable_reg = LP8788_EN_LDO_C,
 524                 .enable_mask = LP8788_EN_ALDO9_M,
 525         },
 526         {
 527                 .name = "aldo10",
 528                 .id = ALDO10,
 529                 .ops = &lp8788_ldo_voltage_fixed_ops,
 530                 .n_voltages = 1,
 531                 .type = REGULATOR_VOLTAGE,
 532                 .owner = THIS_MODULE,
 533                 .enable_reg = LP8788_EN_LDO_C,
 534                 .enable_mask = LP8788_EN_ALDO10_M,
 535         },
 536 };
 537
 538 static int lp8788_gpio_request_ldo_en(struct platform_device *pdev,
 539                                 struct lp8788_ldo *ldo,
 540                                 enum lp8788_ext_ldo_en_id id)
 541 {
 542         struct device *dev = &pdev->dev;
 543         struct lp8788_ldo_enable_pin *pin = ldo->en_pin;
 544         int ret, gpio, pinstate;
 545         char *name[] = {
 546                 [EN_ALDO1]   = "LP8788_EN_ALDO1",
 547                 [EN_ALDO234] = "LP8788_EN_ALDO234",
 548                 [EN_ALDO5]   = "LP8788_EN_ALDO5",
 549                 [EN_ALDO7]   = "LP8788_EN_ALDO7",
 550                 [EN_DLDO7]   = "LP8788_EN_DLDO7",
 551                 [EN_DLDO911] = "LP8788_EN_DLDO911",
 552         };
 553
 554         gpio = pin->gpio;
 555         if (!gpio_is_valid(gpio)) {
 556                 dev_err(dev, "invalid gpio: %d\n", gpio);
 557                 return -EINVAL;
 558         }
 559
 560         pinstate = pin->init_state;
 561         ret = devm_gpio_request_one(dev, gpio, pinstate, name[id]);
 562         if (ret == -EBUSY) {
 563                 dev_warn(dev, "gpio%d already used\n", gpio);
 564                 return 0;
 565         }
 566
 567         return ret;
 568 }
 569
 570 static int lp8788_config_ldo_enable_mode(struct platform_device *pdev,
 571                                         struct lp8788_ldo *ldo,
 572                                         enum lp8788_ldo_id id)
 573 {
 574         int ret;
 575         struct lp8788 *lp = ldo->lp;
 576         struct lp8788_platform_data *pdata = lp->pdata;
 577         enum lp8788_ext_ldo_en_id enable_id;
 578         u8 en_mask[] = {
 579                 [EN_ALDO1]   = LP8788_EN_SEL_ALDO1_M,
 580                 [EN_ALDO234] = LP8788_EN_SEL_ALDO234_M,
 581                 [EN_ALDO5]   = LP8788_EN_SEL_ALDO5_M,
 582                 [EN_ALDO7]   = LP8788_EN_SEL_ALDO7_M,
 583                 [EN_DLDO7]   = LP8788_EN_SEL_DLDO7_M,
 584                 [EN_DLDO911] = LP8788_EN_SEL_DLDO911_M,
 585         };
 586
 587         switch (id) {
 588         case DLDO7:
 589                 enable_id = EN_DLDO7;
 590                 break;
 591         case DLDO9:
 592         case DLDO11:
 593                 enable_id = EN_DLDO911;
 594                 break;
 595         case ALDO1:
 596                 enable_id = EN_ALDO1;
 597                 break;
 598         case ALDO2 ... ALDO4:
 599                 enable_id = EN_ALDO234;
 600                 break;
 601         case ALDO5:
 602                 enable_id = EN_ALDO5;
 603                 break;
 604         case ALDO7:
 605                 enable_id = EN_ALDO7;
 606                 break;
 607         default:
 608                 return 0;
 609         }
 610
 611         /* if no platform data for ldo pin, then set default enable mode */
 612         if (!pdata || !pdata->ldo_pin || !pdata->ldo_pin[enable_id])
 613                 goto set_default_ldo_enable_mode;
 614
 615         ldo->en_pin = pdata->ldo_pin[enable_id];
 616
 617         ret = lp8788_gpio_request_ldo_en(pdev, ldo, enable_id);
 618         if (ret) {
 619                 ldo->en_pin = NULL;
 620                 goto set_default_ldo_enable_mode;
 621         }
 622
 623         return ret;
 624
 625 set_default_ldo_enable_mode:
 626         return lp8788_update_bits(lp, LP8788_EN_SEL, en_mask[enable_id], 0);
 627 }
 628
 629 static int lp8788_dldo_probe(struct platform_device *pdev)
 630 {
 631         struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent);
 632         int id = pdev->id;
 633         struct lp8788_ldo *ldo;
 634         struct regulator_config cfg = { };
 635         struct regulator_dev *rdev;
 636         int ret;
 637
 638         ldo = devm_kzalloc(&pdev->dev, sizeof(struct lp8788_ldo), GFP_KERNEL);
 639         if (!ldo)
 640                 return -ENOMEM;
 641
 642         ldo->lp = lp;
 643         ret = lp8788_config_ldo_enable_mode(pdev, ldo, lp8788_dldo_id[id]);
 644         if (ret)
 645                 return ret;
 646
 647         cfg.dev = pdev->dev.parent;
 648         cfg.init_data = lp->pdata ? lp->pdata->dldo_data[id] : NULL;
 649         cfg.driver_data = ldo;
 650         cfg.regmap = lp->regmap;
 651
 652         rdev = regulator_register(&lp8788_dldo_desc[id], &cfg);
 653         if (IS_ERR(rdev)) {
 654                 ret = PTR_ERR(rdev);
 655                 dev_err(&pdev->dev, "DLDO%d regulator register err = %d\n",
 656                                 id + 1, ret);
 657                 return ret;
 658         }
 659
 660         ldo->regulator = rdev;
 661         platform_set_drvdata(pdev, ldo);
 662
 663         return 0;
 664 }
 665
 666 static int lp8788_dldo_remove(struct platform_device *pdev)
 667 {
 668         struct lp8788_ldo *ldo = platform_get_drvdata(pdev);
 669
 670         platform_set_drvdata(pdev, NULL);
 671         regulator_unregister(ldo->regulator);
 672
 673         return 0;
 674 }
 675
 676 static struct platform_driver lp8788_dldo_driver = {
 677         .probe = lp8788_dldo_probe,
 678         .remove = lp8788_dldo_remove,
 679         .driver = {
 680                 .name = LP8788_DEV_DLDO,
 681                 .owner = THIS_MODULE,
 682         },
 683 };
 684
 685 static int lp8788_aldo_probe(struct platform_device *pdev)
 686 {
 687         struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent);
 688         int id = pdev->id;
 689         struct lp8788_ldo *ldo;
 690         struct regulator_config cfg = { };
 691         struct regulator_dev *rdev;
 692         int ret;
 693
 694         ldo = devm_kzalloc(&pdev->dev, sizeof(struct lp8788_ldo), GFP_KERNEL);
 695         if (!ldo)
 696                 return -ENOMEM;
 697
 698         ldo->lp = lp;
 699         ret = lp8788_config_ldo_enable_mode(pdev, ldo, lp8788_aldo_id[id]);
 700         if (ret)
 701                 return ret;
 702
 703         cfg.dev = pdev->dev.parent;
 704         cfg.init_data = lp->pdata ? lp->pdata->aldo_data[id] : NULL;
 705         cfg.driver_data = ldo;
 706         cfg.regmap = lp->regmap;
 707
 708         rdev = regulator_register(&lp8788_aldo_desc[id], &cfg);
 709         if (IS_ERR(rdev)) {
 710                 ret = PTR_ERR(rdev);
 711                 dev_err(&pdev->dev, "ALDO%d regulator register err = %d\n",
 712                                 id + 1, ret);
 713                 return ret;
 714         }
 715
 716         ldo->regulator = rdev;
 717         platform_set_drvdata(pdev, ldo);
 718
 719         return 0;
 720 }
 721
 722 static int lp8788_aldo_remove(struct platform_device *pdev)
 723 {
 724         struct lp8788_ldo *ldo = platform_get_drvdata(pdev);
 725
 726         platform_set_drvdata(pdev, NULL);
 727         regulator_unregister(ldo->regulator);
 728
 729         return 0;
 730 }
 731
 732 static struct platform_driver lp8788_aldo_driver = {
 733         .probe = lp8788_aldo_probe,
 734         .remove = lp8788_aldo_remove,
 735         .driver = {
 736                 .name = LP8788_DEV_ALDO,
 737                 .owner = THIS_MODULE,
 738         },
 739 };
 740
 741 static int __init lp8788_ldo_init(void)
 742 {
 743         int ret;
 744
 745         ret = platform_driver_register(&lp8788_dldo_driver);
 746         if (ret)
 747                 return ret;
 748
 749         return platform_driver_register(&lp8788_aldo_driver);
 750 }
 751 subsys_initcall(lp8788_ldo_init);
 752
 753 static void __exit lp8788_ldo_exit(void)
 754 {
 755         platform_driver_unregister(&lp8788_aldo_driver);
 756         platform_driver_unregister(&lp8788_dldo_driver);
 757 }
 758 module_exit(lp8788_ldo_exit);
 759
 760 MODULE_DESCRIPTION("TI LP8788 LDO Driver");
 761 MODULE_AUTHOR("Milo Kim");
 762 MODULE_LICENSE("GPL");
 763 MODULE_ALIAS("platform:lp8788-dldo");
 764 MODULE_ALIAS("platform:lp8788-aldo");