drivers/regulator/twl-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * twl-regulator.c -- support regulators in twl4030/twl6030 family chips
   4  *
   5  * Copyright (C) 2008 David Brownell
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/string.h>
  10 #include <linux/slab.h>
  11 #include <linux/init.h>
  12 #include <linux/err.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/of.h>
  15 #include <linux/of_device.h>
  16 #include <linux/regulator/driver.h>
  17 #include <linux/regulator/machine.h>
  18 #include <linux/regulator/of_regulator.h>
  19 #include <linux/mfd/twl.h>
  20 #include <linux/delay.h>
  21
  22 /*
  23  * The TWL4030/TW5030/TPS659x0 family chips include power management, a
  24  * USB OTG transceiver, an RTC, ADC, PWM, and lots more.  Some versions
  25  * include an audio codec, battery charger, and more voltage regulators.
  26  * These chips are often used in OMAP-based systems.
  27  *
  28  * This driver implements software-based resource control for various
  29  * voltage regulators.  This is usually augmented with state machine
  30  * based control.
  31  */
  32
  33 struct twlreg_info {
  34         /* start of regulator's PM_RECEIVER control register bank */
  35         u8                      base;
  36
  37         /* twl resource ID, for resource control state machine */
  38         u8                      id;
  39
  40         /* voltage in mV = table[VSEL]; table_len must be a power-of-two */
  41         u8                      table_len;
  42         const u16               *table;
  43
  44         /* State REMAP default configuration */
  45         u8                      remap;
  46
  47         /* used by regulator core */
  48         struct regulator_desc   desc;
  49
  50         /* chip specific features */
  51         unsigned long           features;
  52
  53         /* data passed from board for external get/set voltage */
  54         void                    *data;
  55 };
  56
  57
  58 /* LDO control registers ... offset is from the base of its register bank.
  59  * The first three registers of all power resource banks help hardware to
  60  * manage the various resource groups.
  61  */
  62 /* Common offset in TWL4030/6030 */
  63 #define VREG_GRP                0
  64 /* TWL4030 register offsets */
  65 #define VREG_TYPE               1
  66 #define VREG_REMAP              2
  67 #define VREG_DEDICATED          3       /* LDO control */
  68 #define VREG_VOLTAGE_SMPS_4030  9
  69 /* TWL6030 register offsets */
  70 #define VREG_TRANS              1
  71 #define VREG_STATE              2
  72 #define VREG_VOLTAGE            3
  73 #define VREG_VOLTAGE_SMPS       4
  74
  75 static inline int
  76 twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
  77 {
  78         u8 value;
  79         int status;
  80
  81         status = twl_i2c_read_u8(slave_subgp,
  82                         &value, info->base + offset);
  83         return (status < 0) ? status : value;
  84 }
  85
  86 static inline int
  87 twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset,
  88                                                  u8 value)
  89 {
  90         return twl_i2c_write_u8(slave_subgp,
  91                         value, info->base + offset);
  92 }
  93
  94 /*----------------------------------------------------------------------*/
  95
  96 /* generic power resource operations, which work on all regulators */
  97
  98 static int twlreg_grp(struct regulator_dev *rdev)
  99 {
 100         return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER,
 101                                                                  VREG_GRP);
 102 }
 103
 104 /*
 105  * Enable/disable regulators by joining/leaving the P1 (processor) group.
 106  * We assume nobody else is updating the DEV_GRP registers.
 107  */
 108 /* definition for 4030 family */
 109 #define P3_GRP_4030     BIT(7)          /* "peripherals" */
 110 #define P2_GRP_4030     BIT(6)          /* secondary processor, modem, etc */
 111 #define P1_GRP_4030     BIT(5)          /* CPU/Linux */
 112 /* definition for 6030 family */
 113 #define P3_GRP_6030     BIT(2)          /* secondary processor, modem, etc */
 114 #define P2_GRP_6030     BIT(1)          /* "peripherals" */
 115 #define P1_GRP_6030     BIT(0)          /* CPU/Linux */
 116
 117 static int twl4030reg_is_enabled(struct regulator_dev *rdev)
 118 {
 119         int     state = twlreg_grp(rdev);
 120
 121         if (state < 0)
 122                 return state;
 123
 124         return state & P1_GRP_4030;
 125 }
 126
 127 #define PB_I2C_BUSY     BIT(0)
 128 #define PB_I2C_BWEN     BIT(1)
 129
 130 /* Wait until buffer empty/ready to send a word on power bus. */
 131 static int twl4030_wait_pb_ready(void)
 132 {
 133
 134         int     ret;
 135         int     timeout = 10;
 136         u8      val;
 137
 138         do {
 139                 ret = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
 140                                       TWL4030_PM_MASTER_PB_CFG);
 141                 if (ret < 0)
 142                         return ret;
 143
 144                 if (!(val & PB_I2C_BUSY))
 145                         return 0;
 146
 147                 mdelay(1);
 148                 timeout--;
 149         } while (timeout);
 150
 151         return -ETIMEDOUT;
 152 }
 153
 154 /* Send a word over the powerbus */
 155 static int twl4030_send_pb_msg(unsigned msg)
 156 {
 157         u8      val;
 158         int     ret;
 159
 160         /* save powerbus configuration */
 161         ret = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
 162                               TWL4030_PM_MASTER_PB_CFG);
 163         if (ret < 0)
 164                 return ret;
 165
 166         /* Enable i2c access to powerbus */
 167         ret = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val | PB_I2C_BWEN,
 168                                TWL4030_PM_MASTER_PB_CFG);
 169         if (ret < 0)
 170                 return ret;
 171
 172         ret = twl4030_wait_pb_ready();
 173         if (ret < 0)
 174                 return ret;
 175
 176         ret = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, msg >> 8,
 177                                TWL4030_PM_MASTER_PB_WORD_MSB);
 178         if (ret < 0)
 179                 return ret;
 180
 181         ret = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, msg & 0xff,
 182                                TWL4030_PM_MASTER_PB_WORD_LSB);
 183         if (ret < 0)
 184                 return ret;
 185
 186         ret = twl4030_wait_pb_ready();
 187         if (ret < 0)
 188                 return ret;
 189
 190         /* Restore powerbus configuration */
 191         return twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val,
 192                                 TWL4030_PM_MASTER_PB_CFG);
 193 }
 194
 195 static int twl4030reg_enable(struct regulator_dev *rdev)
 196 {
 197         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 198         int                     grp;
 199
 200         grp = twlreg_grp(rdev);
 201         if (grp < 0)
 202                 return grp;
 203
 204         grp |= P1_GRP_4030;
 205
 206         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
 207 }
 208
 209 static int twl4030reg_disable(struct regulator_dev *rdev)
 210 {
 211         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 212         int                     grp;
 213
 214         grp = twlreg_grp(rdev);
 215         if (grp < 0)
 216                 return grp;
 217
 218         grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030);
 219
 220         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
 221 }
 222
 223 static int twl4030reg_get_status(struct regulator_dev *rdev)
 224 {
 225         int     state = twlreg_grp(rdev);
 226
 227         if (state < 0)
 228                 return state;
 229         state &= 0x0f;
 230
 231         /* assume state != WARM_RESET; we'd not be running...  */
 232         if (!state)
 233                 return REGULATOR_STATUS_OFF;
 234         return (state & BIT(3))
 235                 ? REGULATOR_STATUS_NORMAL
 236                 : REGULATOR_STATUS_STANDBY;
 237 }
 238
 239 static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
 240 {
 241         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 242         unsigned                message;
 243
 244         /* We can only set the mode through state machine commands... */
 245         switch (mode) {
 246         case REGULATOR_MODE_NORMAL:
 247                 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
 248                 break;
 249         case REGULATOR_MODE_STANDBY:
 250                 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
 251                 break;
 252         default:
 253                 return -EINVAL;
 254         }
 255
 256         return twl4030_send_pb_msg(message);
 257 }
 258
 259 static inline unsigned int twl4030reg_map_mode(unsigned int mode)
 260 {
 261         switch (mode) {
 262         case RES_STATE_ACTIVE:
 263                 return REGULATOR_MODE_NORMAL;
 264         case RES_STATE_SLEEP:
 265                 return REGULATOR_MODE_STANDBY;
 266         default:
 267                 return REGULATOR_MODE_INVALID;
 268         }
 269 }
 270
 271 /*----------------------------------------------------------------------*/
 272
 273 /*
 274  * Support for adjustable-voltage LDOs uses a four bit (or less) voltage
 275  * select field in its control register.   We use tables indexed by VSEL
 276  * to record voltages in milliVolts.  (Accuracy is about three percent.)
 277  *
 278  * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
 279  * currently handled by listing two slightly different VAUX2 regulators,
 280  * only one of which will be configured.
 281  *
 282  * VSEL values documented as "TI cannot support these values" are flagged
 283  * in these tables as UNSUP() values; we normally won't assign them.
 284  *
 285  * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
 286  * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
 287  */
 288 #define UNSUP_MASK      0x8000
 289
 290 #define UNSUP(x)        (UNSUP_MASK | (x))
 291 #define IS_UNSUP(info, x)                       \
 292         ((UNSUP_MASK & (x)) &&                  \
 293          !((info)->features & TWL4030_ALLOW_UNSUPPORTED))
 294 #define LDO_MV(x)       (~UNSUP_MASK & (x))
 295
 296
 297 static const u16 VAUX1_VSEL_table[] = {
 298         UNSUP(1500), UNSUP(1800), 2500, 2800,
 299         3000, 3000, 3000, 3000,
 300 };
 301 static const u16 VAUX2_4030_VSEL_table[] = {
 302         UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
 303         1500, 1800, UNSUP(1850), 2500,
 304         UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
 305         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 306 };
 307 static const u16 VAUX2_VSEL_table[] = {
 308         1700, 1700, 1900, 1300,
 309         1500, 1800, 2000, 2500,
 310         2100, 2800, 2200, 2300,
 311         2400, 2400, 2400, 2400,
 312 };
 313 static const u16 VAUX3_VSEL_table[] = {
 314         1500, 1800, 2500, 2800,
 315         3000, 3000, 3000, 3000,
 316 };
 317 static const u16 VAUX4_VSEL_table[] = {
 318         700, 1000, 1200, UNSUP(1300),
 319         1500, 1800, UNSUP(1850), 2500,
 320         UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
 321         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 322 };
 323 static const u16 VMMC1_VSEL_table[] = {
 324         1850, 2850, 3000, 3150,
 325 };
 326 static const u16 VMMC2_VSEL_table[] = {
 327         UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
 328         UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
 329         2600, 2800, 2850, 3000,
 330         3150, 3150, 3150, 3150,
 331 };
 332 static const u16 VPLL1_VSEL_table[] = {
 333         1000, 1200, 1300, 1800,
 334         UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
 335 };
 336 static const u16 VPLL2_VSEL_table[] = {
 337         700, 1000, 1200, 1300,
 338         UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
 339         UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
 340         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 341 };
 342 static const u16 VSIM_VSEL_table[] = {
 343         UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
 344         2800, 3000, 3000, 3000,
 345 };
 346 static const u16 VDAC_VSEL_table[] = {
 347         1200, 1300, 1800, 1800,
 348 };
 349 static const u16 VIO_VSEL_table[] = {
 350         1800, 1850,
 351 };
 352 static const u16 VINTANA2_VSEL_table[] = {
 353         2500, 2750,
 354 };
 355
 356 /* 600mV to 1450mV in 12.5 mV steps */
 357 static const struct linear_range VDD1_ranges[] = {
 358         REGULATOR_LINEAR_RANGE(600000, 0, 68, 12500)
 359 };
 360
 361 /* 600mV to 1450mV in 12.5 mV steps, everything above = 1500mV */
 362 static const struct linear_range VDD2_ranges[] = {
 363         REGULATOR_LINEAR_RANGE(600000, 0, 68, 12500),
 364         REGULATOR_LINEAR_RANGE(1500000, 69, 69, 12500)
 365 };
 366
 367 static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
 368 {
 369         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 370         int                     mV = info->table[index];
 371
 372         return IS_UNSUP(info, mV) ? 0 : (LDO_MV(mV) * 1000);
 373 }
 374
 375 static int
 376 twl4030ldo_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
 377 {
 378         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 379
 380         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE,
 381                             selector);
 382 }
 383
 384 static int twl4030ldo_get_voltage_sel(struct regulator_dev *rdev)
 385 {
 386         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 387         int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE);
 388
 389         if (vsel < 0)
 390                 return vsel;
 391
 392         vsel &= info->table_len - 1;
 393         return vsel;
 394 }
 395
 396 static const struct regulator_ops twl4030ldo_ops = {
 397         .list_voltage   = twl4030ldo_list_voltage,
 398
 399         .set_voltage_sel = twl4030ldo_set_voltage_sel,
 400         .get_voltage_sel = twl4030ldo_get_voltage_sel,
 401
 402         .enable         = twl4030reg_enable,
 403         .disable        = twl4030reg_disable,
 404         .is_enabled     = twl4030reg_is_enabled,
 405
 406         .set_mode       = twl4030reg_set_mode,
 407
 408         .get_status     = twl4030reg_get_status,
 409 };
 410
 411 static int
 412 twl4030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
 413                         unsigned *selector)
 414 {
 415         struct twlreg_info *info = rdev_get_drvdata(rdev);
 416         int vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
 417
 418         twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS_4030, vsel);
 419
 420         return 0;
 421 }
 422
 423 static int twl4030smps_get_voltage(struct regulator_dev *rdev)
 424 {
 425         struct twlreg_info *info = rdev_get_drvdata(rdev);
 426         int vsel;
 427
 428         vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
 429                 VREG_VOLTAGE_SMPS_4030);
 430
 431         return vsel * 12500 + 600000;
 432 }
 433
 434 static const struct regulator_ops twl4030smps_ops = {
 435         .list_voltage   = regulator_list_voltage_linear_range,
 436
 437         .set_voltage    = twl4030smps_set_voltage,
 438         .get_voltage    = twl4030smps_get_voltage,
 439 };
 440
 441 /*----------------------------------------------------------------------*/
 442
 443 static const struct regulator_ops twl4030fixed_ops = {
 444         .list_voltage   = regulator_list_voltage_linear,
 445
 446         .enable         = twl4030reg_enable,
 447         .disable        = twl4030reg_disable,
 448         .is_enabled     = twl4030reg_is_enabled,
 449
 450         .set_mode       = twl4030reg_set_mode,
 451
 452         .get_status     = twl4030reg_get_status,
 453 };
 454
 455 /*----------------------------------------------------------------------*/
 456
 457 #define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) \
 458 static const struct twlreg_info TWL4030_INFO_##label = { \
 459         .base = offset, \
 460         .id = num, \
 461         .table_len = ARRAY_SIZE(label##_VSEL_table), \
 462         .table = label##_VSEL_table, \
 463         .remap = remap_conf, \
 464         .desc = { \
 465                 .name = #label, \
 466                 .id = TWL4030_REG_##label, \
 467                 .n_voltages = ARRAY_SIZE(label##_VSEL_table), \
 468                 .ops = &twl4030ldo_ops, \
 469                 .type = REGULATOR_VOLTAGE, \
 470                 .owner = THIS_MODULE, \
 471                 .enable_time = turnon_delay, \
 472                 .of_map_mode = twl4030reg_map_mode, \
 473                 }, \
 474         }
 475
 476 #define TWL4030_ADJUSTABLE_SMPS(label, offset, num, turnon_delay, remap_conf, \
 477                 n_volt) \
 478 static const struct twlreg_info TWL4030_INFO_##label = { \
 479         .base = offset, \
 480         .id = num, \
 481         .remap = remap_conf, \
 482         .desc = { \
 483                 .name = #label, \
 484                 .id = TWL4030_REG_##label, \
 485                 .ops = &twl4030smps_ops, \
 486                 .type = REGULATOR_VOLTAGE, \
 487                 .owner = THIS_MODULE, \
 488                 .enable_time = turnon_delay, \
 489                 .of_map_mode = twl4030reg_map_mode, \
 490                 .n_voltages = n_volt, \
 491                 .n_linear_ranges = ARRAY_SIZE(label ## _ranges), \
 492                 .linear_ranges = label ## _ranges, \
 493                 }, \
 494         }
 495
 496 #define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
 497                         remap_conf) \
 498 static const struct twlreg_info TWLFIXED_INFO_##label = { \
 499         .base = offset, \
 500         .id = num, \
 501         .remap = remap_conf, \
 502         .desc = { \
 503                 .name = #label, \
 504                 .id = TWL4030##_REG_##label, \
 505                 .n_voltages = 1, \
 506                 .ops = &twl4030fixed_ops, \
 507                 .type = REGULATOR_VOLTAGE, \
 508                 .owner = THIS_MODULE, \
 509                 .min_uV = mVolts * 1000, \
 510                 .enable_time = turnon_delay, \
 511                 .of_map_mode = twl4030reg_map_mode, \
 512                 }, \
 513         }
 514
 515 /*
 516  * We list regulators here if systems need some level of
 517  * software control over them after boot.
 518  */
 519 TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08);
 520 TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08);
 521 TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08);
 522 TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08);
 523 TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08);
 524 TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08);
 525 TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08);
 526 TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00);
 527 TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08);
 528 TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00);
 529 TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08);
 530 TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08);
 531 TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08);
 532 TWL4030_ADJUSTABLE_SMPS(VDD1, 0x55, 15, 1000, 0x08, 68);
 533 TWL4030_ADJUSTABLE_SMPS(VDD2, 0x63, 16, 1000, 0x08, 69);
 534 /* VUSBCP is managed *only* by the USB subchip */
 535 TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08);
 536 TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08);
 537 TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08);
 538 TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08);
 539 TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08);
 540
 541 #define TWL_OF_MATCH(comp, family, label) \
 542         { \
 543                 .compatible = comp, \
 544                 .data = &family##_INFO_##label, \
 545         }
 546
 547 #define TWL4030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL4030, label)
 548 #define TWL6030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6030, label)
 549 #define TWL6032_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6032, label)
 550 #define TWLFIXED_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLFIXED, label)
 551 #define TWLSMPS_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLSMPS, label)
 552
 553 static const struct of_device_id twl_of_match[] = {
 554         TWL4030_OF_MATCH("ti,twl4030-vaux1", VAUX1),
 555         TWL4030_OF_MATCH("ti,twl4030-vaux2", VAUX2_4030),
 556         TWL4030_OF_MATCH("ti,twl5030-vaux2", VAUX2),
 557         TWL4030_OF_MATCH("ti,twl4030-vaux3", VAUX3),
 558         TWL4030_OF_MATCH("ti,twl4030-vaux4", VAUX4),
 559         TWL4030_OF_MATCH("ti,twl4030-vmmc1", VMMC1),
 560         TWL4030_OF_MATCH("ti,twl4030-vmmc2", VMMC2),
 561         TWL4030_OF_MATCH("ti,twl4030-vpll1", VPLL1),
 562         TWL4030_OF_MATCH("ti,twl4030-vpll2", VPLL2),
 563         TWL4030_OF_MATCH("ti,twl4030-vsim", VSIM),
 564         TWL4030_OF_MATCH("ti,twl4030-vdac", VDAC),
 565         TWL4030_OF_MATCH("ti,twl4030-vintana2", VINTANA2),
 566         TWL4030_OF_MATCH("ti,twl4030-vio", VIO),
 567         TWL4030_OF_MATCH("ti,twl4030-vdd1", VDD1),
 568         TWL4030_OF_MATCH("ti,twl4030-vdd2", VDD2),
 569         TWLFIXED_OF_MATCH("ti,twl4030-vintana1", VINTANA1),
 570         TWLFIXED_OF_MATCH("ti,twl4030-vintdig", VINTDIG),
 571         TWLFIXED_OF_MATCH("ti,twl4030-vusb1v5", VUSB1V5),
 572         TWLFIXED_OF_MATCH("ti,twl4030-vusb1v8", VUSB1V8),
 573         TWLFIXED_OF_MATCH("ti,twl4030-vusb3v1", VUSB3V1),
 574         {},
 575 };
 576 MODULE_DEVICE_TABLE(of, twl_of_match);
 577
 578 static int twlreg_probe(struct platform_device *pdev)
 579 {
 580         int id;
 581         struct twlreg_info              *info;
 582         const struct twlreg_info        *template;
 583         struct regulator_init_data      *initdata;
 584         struct regulation_constraints   *c;
 585         struct regulator_dev            *rdev;
 586         struct regulator_config         config = { };
 587
 588         template = of_device_get_match_data(&pdev->dev);
 589         if (!template)
 590                 return -ENODEV;
 591
 592         id = template->desc.id;
 593         initdata = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
 594                                                 &template->desc);
 595         if (!initdata)
 596                 return -EINVAL;
 597
 598         info = devm_kmemdup(&pdev->dev, template, sizeof(*info), GFP_KERNEL);
 599         if (!info)
 600                 return -ENOMEM;
 601
 602         /* Constrain board-specific capabilities according to what
 603          * this driver and the chip itself can actually do.
 604          */
 605         c = &initdata->constraints;
 606         c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
 607         c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
 608                                 | REGULATOR_CHANGE_MODE
 609                                 | REGULATOR_CHANGE_STATUS;
 610         switch (id) {
 611         case TWL4030_REG_VIO:
 612         case TWL4030_REG_VDD1:
 613         case TWL4030_REG_VDD2:
 614         case TWL4030_REG_VPLL1:
 615         case TWL4030_REG_VINTANA1:
 616         case TWL4030_REG_VINTANA2:
 617         case TWL4030_REG_VINTDIG:
 618                 c->always_on = true;
 619                 break;
 620         default:
 621                 break;
 622         }
 623
 624         config.dev = &pdev->dev;
 625         config.init_data = initdata;
 626         config.driver_data = info;
 627         config.of_node = pdev->dev.of_node;
 628
 629         rdev = devm_regulator_register(&pdev->dev, &info->desc, &config);
 630         if (IS_ERR(rdev)) {
 631                 dev_err(&pdev->dev, "can't register %s, %ld\n",
 632                                 info->desc.name, PTR_ERR(rdev));
 633                 return PTR_ERR(rdev);
 634         }
 635         platform_set_drvdata(pdev, rdev);
 636
 637         twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP, info->remap);
 638
 639         /* NOTE:  many regulators support short-circuit IRQs (presentable
 640          * as REGULATOR_OVER_CURRENT notifications?) configured via:
 641          *  - SC_CONFIG
 642          *  - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
 643          *  - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
 644          *  - IT_CONFIG
 645          */
 646
 647         return 0;
 648 }
 649
 650 MODULE_ALIAS("platform:twl4030_reg");
 651
 652 static struct platform_driver twlreg_driver = {
 653         .probe          = twlreg_probe,
 654         /* NOTE: short name, to work around driver model truncation of
 655          * "twl_regulator.12" (and friends) to "twl_regulator.1".
 656          */
 657         .driver  = {
 658                 .name  = "twl4030_reg",
 659                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 660                 .of_match_table = of_match_ptr(twl_of_match),
 661         },
 662 };
 663
 664 static int __init twlreg_init(void)
 665 {
 666         return platform_driver_register(&twlreg_driver);
 667 }
 668 subsys_initcall(twlreg_init);
 669
 670 static void __exit twlreg_exit(void)
 671 {
 672         platform_driver_unregister(&twlreg_driver);
 673 }
 674 module_exit(twlreg_exit)
 675
 676 MODULE_DESCRIPTION("TWL4030 regulator driver");
 677 MODULE_LICENSE("GPL");