drivers/regulator/palmas-regulator.c

   1 /*
   2  * Driver for Regulator part of Palmas PMIC Chips
   3  *
   4  * Copyright 2011-2013 Texas Instruments Inc.
   5  *
   6  * Author: Graeme Gregory <[email protected]>
   7  * Author: Ian Lartey <[email protected]>
   8  *
   9  *  This program is free software; you can redistribute it and/or modify it
  10  *  under  the terms of the GNU General  Public License as published by the
  11  *  Free Software Foundation;  either version 2 of the License, or (at your
  12  *  option) any later version.
  13  *
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/err.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/regulator/driver.h>
  22 #include <linux/regulator/machine.h>
  23 #include <linux/slab.h>
  24 #include <linux/regmap.h>
  25 #include <linux/mfd/palmas.h>
  26 #include <linux/of.h>
  27 #include <linux/of_platform.h>
  28 #include <linux/regulator/of_regulator.h>
  29
  30 struct regs_info {
  31         char    *name;
  32         char    *sname;
  33         u8      vsel_addr;
  34         u8      ctrl_addr;
  35         u8      tstep_addr;
  36 };
  37
  38 static const struct regs_info palmas_regs_info[] = {
  39         {
  40                 .name           = "SMPS12",
  41                 .sname          = "smps1-in",
  42                 .vsel_addr      = PALMAS_SMPS12_VOLTAGE,
  43                 .ctrl_addr      = PALMAS_SMPS12_CTRL,
  44                 .tstep_addr     = PALMAS_SMPS12_TSTEP,
  45         },
  46         {
  47                 .name           = "SMPS123",
  48                 .sname          = "smps1-in",
  49                 .vsel_addr      = PALMAS_SMPS12_VOLTAGE,
  50                 .ctrl_addr      = PALMAS_SMPS12_CTRL,
  51                 .tstep_addr     = PALMAS_SMPS12_TSTEP,
  52         },
  53         {
  54                 .name           = "SMPS3",
  55                 .sname          = "smps3-in",
  56                 .vsel_addr      = PALMAS_SMPS3_VOLTAGE,
  57                 .ctrl_addr      = PALMAS_SMPS3_CTRL,
  58         },
  59         {
  60                 .name           = "SMPS45",
  61                 .sname          = "smps4-in",
  62                 .vsel_addr      = PALMAS_SMPS45_VOLTAGE,
  63                 .ctrl_addr      = PALMAS_SMPS45_CTRL,
  64                 .tstep_addr     = PALMAS_SMPS45_TSTEP,
  65         },
  66         {
  67                 .name           = "SMPS457",
  68                 .sname          = "smps4-in",
  69                 .vsel_addr      = PALMAS_SMPS45_VOLTAGE,
  70                 .ctrl_addr      = PALMAS_SMPS45_CTRL,
  71                 .tstep_addr     = PALMAS_SMPS45_TSTEP,
  72         },
  73         {
  74                 .name           = "SMPS6",
  75                 .sname          = "smps6-in",
  76                 .vsel_addr      = PALMAS_SMPS6_VOLTAGE,
  77                 .ctrl_addr      = PALMAS_SMPS6_CTRL,
  78                 .tstep_addr     = PALMAS_SMPS6_TSTEP,
  79         },
  80         {
  81                 .name           = "SMPS7",
  82                 .sname          = "smps7-in",
  83                 .vsel_addr      = PALMAS_SMPS7_VOLTAGE,
  84                 .ctrl_addr      = PALMAS_SMPS7_CTRL,
  85         },
  86         {
  87                 .name           = "SMPS8",
  88                 .sname          = "smps8-in",
  89                 .vsel_addr      = PALMAS_SMPS8_VOLTAGE,
  90                 .ctrl_addr      = PALMAS_SMPS8_CTRL,
  91                 .tstep_addr     = PALMAS_SMPS8_TSTEP,
  92         },
  93         {
  94                 .name           = "SMPS9",
  95                 .sname          = "smps9-in",
  96                 .vsel_addr      = PALMAS_SMPS9_VOLTAGE,
  97                 .ctrl_addr      = PALMAS_SMPS9_CTRL,
  98         },
  99         {
 100                 .name           = "SMPS10",
 101                 .sname          = "smps10-in",
 102                 .ctrl_addr      = PALMAS_SMPS10_CTRL,
 103         },
 104         {
 105                 .name           = "LDO1",
 106                 .sname          = "ldo1-in",
 107                 .vsel_addr      = PALMAS_LDO1_VOLTAGE,
 108                 .ctrl_addr      = PALMAS_LDO1_CTRL,
 109         },
 110         {
 111                 .name           = "LDO2",
 112                 .sname          = "ldo2-in",
 113                 .vsel_addr      = PALMAS_LDO2_VOLTAGE,
 114                 .ctrl_addr      = PALMAS_LDO2_CTRL,
 115         },
 116         {
 117                 .name           = "LDO3",
 118                 .sname          = "ldo3-in",
 119                 .vsel_addr      = PALMAS_LDO3_VOLTAGE,
 120                 .ctrl_addr      = PALMAS_LDO3_CTRL,
 121         },
 122         {
 123                 .name           = "LDO4",
 124                 .sname          = "ldo4-in",
 125                 .vsel_addr      = PALMAS_LDO4_VOLTAGE,
 126                 .ctrl_addr      = PALMAS_LDO4_CTRL,
 127         },
 128         {
 129                 .name           = "LDO5",
 130                 .sname          = "ldo5-in",
 131                 .vsel_addr      = PALMAS_LDO5_VOLTAGE,
 132                 .ctrl_addr      = PALMAS_LDO5_CTRL,
 133         },
 134         {
 135                 .name           = "LDO6",
 136                 .sname          = "ldo6-in",
 137                 .vsel_addr      = PALMAS_LDO6_VOLTAGE,
 138                 .ctrl_addr      = PALMAS_LDO6_CTRL,
 139         },
 140         {
 141                 .name           = "LDO7",
 142                 .sname          = "ldo7-in",
 143                 .vsel_addr      = PALMAS_LDO7_VOLTAGE,
 144                 .ctrl_addr      = PALMAS_LDO7_CTRL,
 145         },
 146         {
 147                 .name           = "LDO8",
 148                 .sname          = "ldo8-in",
 149                 .vsel_addr      = PALMAS_LDO8_VOLTAGE,
 150                 .ctrl_addr      = PALMAS_LDO8_CTRL,
 151         },
 152         {
 153                 .name           = "LDO9",
 154                 .sname          = "ldo9-in",
 155                 .vsel_addr      = PALMAS_LDO9_VOLTAGE,
 156                 .ctrl_addr      = PALMAS_LDO9_CTRL,
 157         },
 158         {
 159                 .name           = "LDOLN",
 160                 .sname          = "ldoln-in",
 161                 .vsel_addr      = PALMAS_LDOLN_VOLTAGE,
 162                 .ctrl_addr      = PALMAS_LDOLN_CTRL,
 163         },
 164         {
 165                 .name           = "LDOUSB",
 166                 .sname          = "ldousb-in",
 167                 .vsel_addr      = PALMAS_LDOUSB_VOLTAGE,
 168                 .ctrl_addr      = PALMAS_LDOUSB_CTRL,
 169         },
 170         {
 171                 .name           = "REGEN1",
 172                 .ctrl_addr      = PALMAS_REGEN1_CTRL,
 173         },
 174         {
 175                 .name           = "REGEN2",
 176                 .ctrl_addr      = PALMAS_REGEN2_CTRL,
 177         },
 178         {
 179                 .name           = "REGEN3",
 180                 .ctrl_addr      = PALMAS_REGEN3_CTRL,
 181         },
 182         {
 183                 .name           = "SYSEN1",
 184                 .ctrl_addr      = PALMAS_SYSEN1_CTRL,
 185         },
 186         {
 187                 .name           = "SYSEN2",
 188                 .ctrl_addr      = PALMAS_SYSEN2_CTRL,
 189         },
 190 };
 191
 192 static unsigned int palmas_smps_ramp_delay[4] = {0, 10000, 5000, 2500};
 193
 194 #define SMPS_CTRL_MODE_OFF              0x00
 195 #define SMPS_CTRL_MODE_ON               0x01
 196 #define SMPS_CTRL_MODE_ECO              0x02
 197 #define SMPS_CTRL_MODE_PWM              0x03
 198
 199 /* These values are derived from the data sheet. And are the number of steps
 200  * where there is a voltage change, the ranges at beginning and end of register
 201  * max/min values where there are no change are ommitted.
 202  *
 203  * So they are basically (maxV-minV)/stepV
 204  */
 205 #define PALMAS_SMPS_NUM_VOLTAGES        117
 206 #define PALMAS_SMPS10_NUM_VOLTAGES      2
 207 #define PALMAS_LDO_NUM_VOLTAGES         50
 208
 209 #define SMPS10_VSEL                     (1<<3)
 210 #define SMPS10_BOOST_EN                 (1<<2)
 211 #define SMPS10_BYPASS_EN                (1<<1)
 212 #define SMPS10_SWITCH_EN                (1<<0)
 213
 214 #define REGULATOR_SLAVE                 0
 215
 216 static int palmas_smps_read(struct palmas *palmas, unsigned int reg,
 217                 unsigned int *dest)
 218 {
 219         unsigned int addr;
 220
 221         addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
 222
 223         return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
 224 }
 225
 226 static int palmas_smps_write(struct palmas *palmas, unsigned int reg,
 227                 unsigned int value)
 228 {
 229         unsigned int addr;
 230
 231         addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
 232
 233         return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
 234 }
 235
 236 static int palmas_ldo_read(struct palmas *palmas, unsigned int reg,
 237                 unsigned int *dest)
 238 {
 239         unsigned int addr;
 240
 241         addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
 242
 243         return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
 244 }
 245
 246 static int palmas_ldo_write(struct palmas *palmas, unsigned int reg,
 247                 unsigned int value)
 248 {
 249         unsigned int addr;
 250
 251         addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
 252
 253         return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
 254 }
 255
 256 static int palmas_is_enabled_smps(struct regulator_dev *dev)
 257 {
 258         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 259         int id = rdev_get_id(dev);
 260         unsigned int reg;
 261
 262         palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 263
 264         reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
 265         reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
 266
 267         return !!(reg);
 268 }
 269
 270 static int palmas_enable_smps(struct regulator_dev *dev)
 271 {
 272         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 273         int id = rdev_get_id(dev);
 274         unsigned int reg;
 275
 276         palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 277
 278         reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 279         if (pmic->current_reg_mode[id])
 280                 reg |= pmic->current_reg_mode[id];
 281         else
 282                 reg |= SMPS_CTRL_MODE_ON;
 283
 284         palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
 285
 286         return 0;
 287 }
 288
 289 static int palmas_disable_smps(struct regulator_dev *dev)
 290 {
 291         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 292         int id = rdev_get_id(dev);
 293         unsigned int reg;
 294
 295         palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 296
 297         reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 298
 299         palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
 300
 301         return 0;
 302 }
 303
 304 static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode)
 305 {
 306         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 307         int id = rdev_get_id(dev);
 308         unsigned int reg;
 309         bool rail_enable = true;
 310
 311         palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 312         reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 313
 314         if (reg == SMPS_CTRL_MODE_OFF)
 315                 rail_enable = false;
 316
 317         switch (mode) {
 318         case REGULATOR_MODE_NORMAL:
 319                 reg |= SMPS_CTRL_MODE_ON;
 320                 break;
 321         case REGULATOR_MODE_IDLE:
 322                 reg |= SMPS_CTRL_MODE_ECO;
 323                 break;
 324         case REGULATOR_MODE_FAST:
 325                 reg |= SMPS_CTRL_MODE_PWM;
 326                 break;
 327         default:
 328                 return -EINVAL;
 329         }
 330
 331         pmic->current_reg_mode[id] = reg & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 332         if (rail_enable)
 333                 palmas_smps_write(pmic->palmas,
 334                         palmas_regs_info[id].ctrl_addr, reg);
 335         return 0;
 336 }
 337
 338 static unsigned int palmas_get_mode_smps(struct regulator_dev *dev)
 339 {
 340         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 341         int id = rdev_get_id(dev);
 342         unsigned int reg;
 343
 344         reg = pmic->current_reg_mode[id] & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 345
 346         switch (reg) {
 347         case SMPS_CTRL_MODE_ON:
 348                 return REGULATOR_MODE_NORMAL;
 349         case SMPS_CTRL_MODE_ECO:
 350                 return REGULATOR_MODE_IDLE;
 351         case SMPS_CTRL_MODE_PWM:
 352                 return REGULATOR_MODE_FAST;
 353         }
 354
 355         return 0;
 356 }
 357
 358 static int palmas_list_voltage_smps(struct regulator_dev *dev,
 359                                         unsigned selector)
 360 {
 361         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 362         int id = rdev_get_id(dev);
 363         int mult = 1;
 364
 365         /* Read the multiplier set in VSEL register to return
 366          * the correct voltage.
 367          */
 368         if (pmic->range[id])
 369                 mult = 2;
 370
 371         if (selector == 0)
 372                 return 0;
 373         else if (selector < 6)
 374                 return 500000 * mult;
 375         else
 376                 /* Voltage is linear mapping starting from selector 6,
 377                  * volt = (0.49V + ((selector - 5) * 0.01V)) * RANGE
 378                  * RANGE is either x1 or x2
 379                  */
 380                 return (490000 + ((selector - 5) * 10000)) * mult;
 381 }
 382
 383 static int palmas_map_voltage_smps(struct regulator_dev *rdev,
 384                 int min_uV, int max_uV)
 385 {
 386         struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
 387         int id = rdev_get_id(rdev);
 388         int ret, voltage;
 389
 390         if (min_uV == 0)
 391                 return 0;
 392
 393         if (pmic->range[id]) { /* RANGE is x2 */
 394                 if (min_uV < 1000000)
 395                         min_uV = 1000000;
 396                 ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 6;
 397         } else {                /* RANGE is x1 */
 398                 if (min_uV < 500000)
 399                         min_uV = 500000;
 400                 ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 6;
 401         }
 402
 403         /* Map back into a voltage to verify we're still in bounds */
 404         voltage = palmas_list_voltage_smps(rdev, ret);
 405         if (voltage < min_uV || voltage > max_uV)
 406                 return -EINVAL;
 407
 408         return ret;
 409 }
 410
 411 static int palma_smps_set_voltage_smps_time_sel(struct regulator_dev *rdev,
 412         unsigned int old_selector, unsigned int new_selector)
 413 {
 414         struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
 415         int id = rdev_get_id(rdev);
 416         int old_uv, new_uv;
 417         unsigned int ramp_delay = pmic->ramp_delay[id];
 418
 419         if (!ramp_delay)
 420                 return 0;
 421
 422         old_uv = palmas_list_voltage_smps(rdev, old_selector);
 423         if (old_uv < 0)
 424                 return old_uv;
 425
 426         new_uv = palmas_list_voltage_smps(rdev, new_selector);
 427         if (new_uv < 0)
 428                 return new_uv;
 429
 430         return DIV_ROUND_UP(abs(old_uv - new_uv), ramp_delay);
 431 }
 432
 433 static int palmas_smps_set_ramp_delay(struct regulator_dev *rdev,
 434                  int ramp_delay)
 435 {
 436         struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
 437         int id = rdev_get_id(rdev);
 438         unsigned int reg = 0;
 439         unsigned int addr = palmas_regs_info[id].tstep_addr;
 440         int ret;
 441
 442         /* SMPS3 and SMPS7 do not have tstep_addr setting */
 443         switch (id) {
 444         case PALMAS_REG_SMPS3:
 445         case PALMAS_REG_SMPS7:
 446                 return 0;
 447         }
 448
 449         if (ramp_delay <= 0)
 450                 reg = 0;
 451         else if (ramp_delay <= 2500)
 452                 reg = 3;
 453         else if (ramp_delay <= 5000)
 454                 reg = 2;
 455         else
 456                 reg = 1;
 457
 458         ret = palmas_smps_write(pmic->palmas, addr, reg);
 459         if (ret < 0) {
 460                 dev_err(pmic->palmas->dev, "TSTEP write failed: %d\n", ret);
 461                 return ret;
 462         }
 463
 464         pmic->ramp_delay[id] = palmas_smps_ramp_delay[reg];
 465         return ret;
 466 }
 467
 468 static struct regulator_ops palmas_ops_smps = {
 469         .is_enabled             = palmas_is_enabled_smps,
 470         .enable                 = palmas_enable_smps,
 471         .disable                = palmas_disable_smps,
 472         .set_mode               = palmas_set_mode_smps,
 473         .get_mode               = palmas_get_mode_smps,
 474         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 475         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 476         .list_voltage           = palmas_list_voltage_smps,
 477         .map_voltage            = palmas_map_voltage_smps,
 478         .set_voltage_time_sel   = palma_smps_set_voltage_smps_time_sel,
 479         .set_ramp_delay         = palmas_smps_set_ramp_delay,
 480 };
 481
 482 static struct regulator_ops palmas_ops_smps10 = {
 483         .is_enabled             = regulator_is_enabled_regmap,
 484         .enable                 = regulator_enable_regmap,
 485         .disable                = regulator_disable_regmap,
 486         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 487         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 488         .list_voltage           = regulator_list_voltage_linear,
 489         .map_voltage            = regulator_map_voltage_linear,
 490 };
 491
 492 static int palmas_is_enabled_ldo(struct regulator_dev *dev)
 493 {
 494         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 495         int id = rdev_get_id(dev);
 496         unsigned int reg;
 497
 498         palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 499
 500         reg &= PALMAS_LDO1_CTRL_STATUS;
 501
 502         return !!(reg);
 503 }
 504
 505 static struct regulator_ops palmas_ops_ldo = {
 506         .is_enabled             = palmas_is_enabled_ldo,
 507         .enable                 = regulator_enable_regmap,
 508         .disable                = regulator_disable_regmap,
 509         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 510         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 511         .list_voltage           = regulator_list_voltage_linear,
 512         .map_voltage            = regulator_map_voltage_linear,
 513 };
 514
 515 static struct regulator_ops palmas_ops_extreg = {
 516         .is_enabled             = regulator_is_enabled_regmap,
 517         .enable                 = regulator_enable_regmap,
 518         .disable                = regulator_disable_regmap,
 519 };
 520
 521 /*
 522  * setup the hardware based sleep configuration of the SMPS/LDO regulators
 523  * from the platform data. This is different to the software based control
 524  * supported by the regulator framework as it is controlled by toggling
 525  * pins on the PMIC such as PREQ, SYSEN, ...
 526  */
 527 static int palmas_smps_init(struct palmas *palmas, int id,
 528                 struct palmas_reg_init *reg_init)
 529 {
 530         unsigned int reg;
 531         unsigned int addr;
 532         int ret;
 533
 534         addr = palmas_regs_info[id].ctrl_addr;
 535
 536         ret = palmas_smps_read(palmas, addr, &reg);
 537         if (ret)
 538                 return ret;
 539
 540         switch (id) {
 541         case PALMAS_REG_SMPS10:
 542                 reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK;
 543                 if (reg_init->mode_sleep)
 544                         reg |= reg_init->mode_sleep <<
 545                                         PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT;
 546                 break;
 547         default:
 548                 if (reg_init->warm_reset)
 549                         reg |= PALMAS_SMPS12_CTRL_WR_S;
 550                 else
 551                         reg &= ~PALMAS_SMPS12_CTRL_WR_S;
 552
 553                 if (reg_init->roof_floor)
 554                         reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
 555                 else
 556                         reg &= ~PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
 557
 558                 reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK;
 559                 if (reg_init->mode_sleep)
 560                         reg |= reg_init->mode_sleep <<
 561                                         PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT;
 562         }
 563
 564         ret = palmas_smps_write(palmas, addr, reg);
 565         if (ret)
 566                 return ret;
 567
 568         if (palmas_regs_info[id].vsel_addr && reg_init->vsel) {
 569                 addr = palmas_regs_info[id].vsel_addr;
 570
 571                 reg = reg_init->vsel;
 572
 573                 ret = palmas_smps_write(palmas, addr, reg);
 574                 if (ret)
 575                         return ret;
 576         }
 577
 578
 579         return 0;
 580 }
 581
 582 static int palmas_ldo_init(struct palmas *palmas, int id,
 583                 struct palmas_reg_init *reg_init)
 584 {
 585         unsigned int reg;
 586         unsigned int addr;
 587         int ret;
 588
 589         addr = palmas_regs_info[id].ctrl_addr;
 590
 591         ret = palmas_ldo_read(palmas, addr, &reg);
 592         if (ret)
 593                 return ret;
 594
 595         if (reg_init->warm_reset)
 596                 reg |= PALMAS_LDO1_CTRL_WR_S;
 597         else
 598                 reg &= ~PALMAS_LDO1_CTRL_WR_S;
 599
 600         if (reg_init->mode_sleep)
 601                 reg |= PALMAS_LDO1_CTRL_MODE_SLEEP;
 602         else
 603                 reg &= ~PALMAS_LDO1_CTRL_MODE_SLEEP;
 604
 605         ret = palmas_ldo_write(palmas, addr, reg);
 606         if (ret)
 607                 return ret;
 608
 609         return 0;
 610 }
 611
 612 static int palmas_extreg_init(struct palmas *palmas, int id,
 613                 struct palmas_reg_init *reg_init)
 614 {
 615         unsigned int addr;
 616         int ret;
 617         unsigned int val = 0;
 618
 619         addr = palmas_regs_info[id].ctrl_addr;
 620
 621         if (reg_init->mode_sleep)
 622                 val = PALMAS_REGEN1_CTRL_MODE_SLEEP;
 623
 624         ret = palmas_update_bits(palmas, PALMAS_RESOURCE_BASE,
 625                         addr, PALMAS_REGEN1_CTRL_MODE_SLEEP, val);
 626         if (ret < 0) {
 627                 dev_err(palmas->dev, "Resource reg 0x%02x update failed %d\n",
 628                         addr, ret);
 629                 return ret;
 630         }
 631         return 0;
 632 }
 633
 634 static void palmas_enable_ldo8_track(struct palmas *palmas)
 635 {
 636         unsigned int reg;
 637         unsigned int addr;
 638         int ret;
 639
 640         addr = palmas_regs_info[PALMAS_REG_LDO8].ctrl_addr;
 641
 642         ret = palmas_ldo_read(palmas, addr, &reg);
 643         if (ret) {
 644                 dev_err(palmas->dev, "Error in reading ldo8 control reg\n");
 645                 return;
 646         }
 647
 648         reg |= PALMAS_LDO8_CTRL_LDO_TRACKING_EN;
 649         ret = palmas_ldo_write(palmas, addr, reg);
 650         if (ret < 0) {
 651                 dev_err(palmas->dev, "Error in enabling tracking mode\n");
 652                 return;
 653         }
 654         /*
 655          * When SMPS45 is set to off and LDO8 tracking is enabled, the LDO8
 656          * output is defined by the LDO8_VOLTAGE.VSEL register divided by two,
 657          * and can be set from 0.45 to 1.65 V.
 658          */
 659         addr = palmas_regs_info[PALMAS_REG_LDO8].vsel_addr;
 660         ret = palmas_ldo_read(palmas, addr, &reg);
 661         if (ret) {
 662                 dev_err(palmas->dev, "Error in reading ldo8 voltage reg\n");
 663                 return;
 664         }
 665
 666         reg = (reg << 1) & PALMAS_LDO8_VOLTAGE_VSEL_MASK;
 667         ret = palmas_ldo_write(palmas, addr, reg);
 668         if (ret < 0)
 669                 dev_err(palmas->dev, "Error in setting ldo8 voltage reg\n");
 670
 671         return;
 672 }
 673
 674 static struct of_regulator_match palmas_matches[] = {
 675         { .name = "smps12", },
 676         { .name = "smps123", },
 677         { .name = "smps3", },
 678         { .name = "smps45", },
 679         { .name = "smps457", },
 680         { .name = "smps6", },
 681         { .name = "smps7", },
 682         { .name = "smps8", },
 683         { .name = "smps9", },
 684         { .name = "smps10", },
 685         { .name = "ldo1", },
 686         { .name = "ldo2", },
 687         { .name = "ldo3", },
 688         { .name = "ldo4", },
 689         { .name = "ldo5", },
 690         { .name = "ldo6", },
 691         { .name = "ldo7", },
 692         { .name = "ldo8", },
 693         { .name = "ldo9", },
 694         { .name = "ldoln", },
 695         { .name = "ldousb", },
 696         { .name = "regen1", },
 697         { .name = "regen2", },
 698         { .name = "regen3", },
 699         { .name = "sysen1", },
 700         { .name = "sysen2", },
 701 };
 702
 703 static void palmas_dt_to_pdata(struct device *dev,
 704                 struct device_node *node,
 705                 struct palmas_pmic_platform_data *pdata)
 706 {
 707         struct device_node *regulators;
 708         u32 prop;
 709         int idx, ret;
 710
 711         node = of_node_get(node);
 712         regulators = of_find_node_by_name(node, "regulators");
 713         if (!regulators) {
 714                 dev_info(dev, "regulator node not found\n");
 715                 return;
 716         }
 717
 718         ret = of_regulator_match(dev, regulators, palmas_matches,
 719                         PALMAS_NUM_REGS);
 720         of_node_put(regulators);
 721         if (ret < 0) {
 722                 dev_err(dev, "Error parsing regulator init data: %d\n", ret);
 723                 return;
 724         }
 725
 726         for (idx = 0; idx < PALMAS_NUM_REGS; idx++) {
 727                 if (!palmas_matches[idx].init_data ||
 728                                 !palmas_matches[idx].of_node)
 729                         continue;
 730
 731                 pdata->reg_data[idx] = palmas_matches[idx].init_data;
 732
 733                 pdata->reg_init[idx] = devm_kzalloc(dev,
 734                                 sizeof(struct palmas_reg_init), GFP_KERNEL);
 735
 736                 pdata->reg_init[idx]->warm_reset =
 737                         of_property_read_bool(palmas_matches[idx].of_node,
 738                                              "ti,warm-reset");
 739
 740                 pdata->reg_init[idx]->roof_floor =
 741                         of_property_read_bool(palmas_matches[idx].of_node,
 742                                               "ti,roof-floor");
 743
 744                 ret = of_property_read_u32(palmas_matches[idx].of_node,
 745                                 "ti,mode-sleep", &prop);
 746                 if (!ret)
 747                         pdata->reg_init[idx]->mode_sleep = prop;
 748
 749                 ret = of_property_read_bool(palmas_matches[idx].of_node,
 750                                             "ti,smps-range");
 751                 if (ret)
 752                         pdata->reg_init[idx]->vsel =
 753                                 PALMAS_SMPS12_VOLTAGE_RANGE;
 754
 755                 if (idx == PALMAS_REG_LDO8)
 756                         pdata->enable_ldo8_tracking = of_property_read_bool(
 757                                                 palmas_matches[idx].of_node,
 758                                                 "ti,enable-ldo8-tracking");
 759         }
 760
 761         pdata->ldo6_vibrator = of_property_read_bool(node, "ti,ldo6-vibrator");
 762 }
 763
 764
 765 static int palmas_regulators_probe(struct platform_device *pdev)
 766 {
 767         struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
 768         struct palmas_pmic_platform_data *pdata = pdev->dev.platform_data;
 769         struct device_node *node = pdev->dev.of_node;
 770         struct regulator_dev *rdev;
 771         struct regulator_config config = { };
 772         struct palmas_pmic *pmic;
 773         struct palmas_reg_init *reg_init;
 774         int id = 0, ret;
 775         unsigned int addr, reg;
 776
 777         if (node && !pdata) {
 778                 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 779
 780                 if (!pdata)
 781                         return -ENOMEM;
 782
 783                 palmas_dt_to_pdata(&pdev->dev, node, pdata);
 784         }
 785
 786         pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
 787         if (!pmic)
 788                 return -ENOMEM;
 789
 790         pmic->dev = &pdev->dev;
 791         pmic->palmas = palmas;
 792         palmas->pmic = pmic;
 793         platform_set_drvdata(pdev, pmic);
 794
 795         ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, &reg);
 796         if (ret)
 797                 return ret;
 798
 799         if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN)
 800                 pmic->smps123 = 1;
 801
 802         if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN)
 803                 pmic->smps457 = 1;
 804
 805         config.regmap = palmas->regmap[REGULATOR_SLAVE];
 806         config.dev = &pdev->dev;
 807         config.driver_data = pmic;
 808
 809         for (id = 0; id < PALMAS_REG_LDO1; id++) {
 810                 bool ramp_delay_support = false;
 811
 812                 /*
 813                  * Miss out regulators which are not available due
 814                  * to slaving configurations.
 815                  */
 816                 switch (id) {
 817                 case PALMAS_REG_SMPS12:
 818                 case PALMAS_REG_SMPS3:
 819                         if (pmic->smps123)
 820                                 continue;
 821                         if (id == PALMAS_REG_SMPS12)
 822                                 ramp_delay_support = true;
 823                         break;
 824                 case PALMAS_REG_SMPS123:
 825                         if (!pmic->smps123)
 826                                 continue;
 827                         ramp_delay_support = true;
 828                         break;
 829                 case PALMAS_REG_SMPS45:
 830                 case PALMAS_REG_SMPS7:
 831                         if (pmic->smps457)
 832                                 continue;
 833                         if (id == PALMAS_REG_SMPS45)
 834                                 ramp_delay_support = true;
 835                         break;
 836                 case PALMAS_REG_SMPS457:
 837                         if (!pmic->smps457)
 838                                 continue;
 839                         ramp_delay_support = true;
 840                         break;
 841                 }
 842
 843                 if ((id == PALMAS_REG_SMPS6) || (id == PALMAS_REG_SMPS8))
 844                         ramp_delay_support = true;
 845
 846                 if (ramp_delay_support) {
 847                         addr = palmas_regs_info[id].tstep_addr;
 848                         ret = palmas_smps_read(pmic->palmas, addr, &reg);
 849                         if (ret < 0) {
 850                                 dev_err(&pdev->dev,
 851                                         "reading TSTEP reg failed: %d\n", ret);
 852                                 goto err_unregister_regulator;
 853                         }
 854                         pmic->desc[id].ramp_delay =
 855                                         palmas_smps_ramp_delay[reg & 0x3];
 856                         pmic->ramp_delay[id] = pmic->desc[id].ramp_delay;
 857                 }
 858
 859                 /* Initialise sleep/init values from platform data */
 860                 if (pdata && pdata->reg_init[id]) {
 861                         reg_init = pdata->reg_init[id];
 862                         ret = palmas_smps_init(palmas, id, reg_init);
 863                         if (ret)
 864                                 goto err_unregister_regulator;
 865                 }
 866
 867                 /* Register the regulators */
 868                 pmic->desc[id].name = palmas_regs_info[id].name;
 869                 pmic->desc[id].id = id;
 870
 871                 switch (id) {
 872                 case PALMAS_REG_SMPS10:
 873                         pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES;
 874                         pmic->desc[id].ops = &palmas_ops_smps10;
 875                         pmic->desc[id].vsel_reg =
 876                                         PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 877                                                         PALMAS_SMPS10_CTRL);
 878                         pmic->desc[id].vsel_mask = SMPS10_VSEL;
 879                         pmic->desc[id].enable_reg =
 880                                         PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 881                                                         PALMAS_SMPS10_CTRL);
 882                         pmic->desc[id].enable_mask = SMPS10_BOOST_EN;
 883                         pmic->desc[id].min_uV = 3750000;
 884                         pmic->desc[id].uV_step = 1250000;
 885                         break;
 886                 default:
 887                         /*
 888                          * Read and store the RANGE bit for later use
 889                          * This must be done before regulator is probed,
 890                          * otherwise we error in probe with unsupportable
 891                          * ranges. Read the current smps mode for later use.
 892                          */
 893                         addr = palmas_regs_info[id].vsel_addr;
 894
 895                         ret = palmas_smps_read(pmic->palmas, addr, &reg);
 896                         if (ret)
 897                                 goto err_unregister_regulator;
 898                         if (reg & PALMAS_SMPS12_VOLTAGE_RANGE)
 899                                 pmic->range[id] = 1;
 900
 901                         pmic->desc[id].ops = &palmas_ops_smps;
 902                         pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES;
 903                         pmic->desc[id].vsel_reg =
 904                                         PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 905                                                 palmas_regs_info[id].vsel_addr);
 906                         pmic->desc[id].vsel_mask =
 907                                         PALMAS_SMPS12_VOLTAGE_VSEL_MASK;
 908
 909                         /* Read the smps mode for later use. */
 910                         addr = palmas_regs_info[id].ctrl_addr;
 911                         ret = palmas_smps_read(pmic->palmas, addr, &reg);
 912                         if (ret)
 913                                 goto err_unregister_regulator;
 914                         pmic->current_reg_mode[id] = reg &
 915                                         PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 916                 }
 917
 918                 pmic->desc[id].type = REGULATOR_VOLTAGE;
 919                 pmic->desc[id].owner = THIS_MODULE;
 920
 921                 if (pdata)
 922                         config.init_data = pdata->reg_data[id];
 923                 else
 924                         config.init_data = NULL;
 925
 926                 pmic->desc[id].supply_name = palmas_regs_info[id].sname;
 927                 config.of_node = palmas_matches[id].of_node;
 928
 929                 rdev = regulator_register(&pmic->desc[id], &config);
 930                 if (IS_ERR(rdev)) {
 931                         dev_err(&pdev->dev,
 932                                 "failed to register %s regulator\n",
 933                                 pdev->name);
 934                         ret = PTR_ERR(rdev);
 935                         goto err_unregister_regulator;
 936                 }
 937
 938                 /* Save regulator for cleanup */
 939                 pmic->rdev[id] = rdev;
 940         }
 941
 942         /* Start this loop from the id left from previous loop */
 943         for (; id < PALMAS_NUM_REGS; id++) {
 944
 945                 /* Miss out regulators which are not available due
 946                  * to alternate functions.
 947                  */
 948
 949                 /* Register the regulators */
 950                 pmic->desc[id].name = palmas_regs_info[id].name;
 951                 pmic->desc[id].id = id;
 952                 pmic->desc[id].type = REGULATOR_VOLTAGE;
 953                 pmic->desc[id].owner = THIS_MODULE;
 954
 955                 if (id < PALMAS_REG_REGEN1) {
 956                         pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;
 957                         pmic->desc[id].ops = &palmas_ops_ldo;
 958                         pmic->desc[id].min_uV = 900000;
 959                         pmic->desc[id].uV_step = 50000;
 960                         pmic->desc[id].linear_min_sel = 1;
 961                         pmic->desc[id].vsel_reg =
 962                                         PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
 963                                                 palmas_regs_info[id].vsel_addr);
 964                         pmic->desc[id].vsel_mask =
 965                                         PALMAS_LDO1_VOLTAGE_VSEL_MASK;
 966                         pmic->desc[id].enable_reg =
 967                                         PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
 968                                                 palmas_regs_info[id].ctrl_addr);
 969                         pmic->desc[id].enable_mask =
 970                                         PALMAS_LDO1_CTRL_MODE_ACTIVE;
 971
 972                         /* Check if LDO8 is in tracking mode or not */
 973                         if (pdata && (id == PALMAS_REG_LDO8) &&
 974                                         pdata->enable_ldo8_tracking) {
 975                                 palmas_enable_ldo8_track(palmas);
 976                                 pmic->desc[id].min_uV = 450000;
 977                                 pmic->desc[id].uV_step = 25000;
 978                         }
 979                 } else {
 980                         pmic->desc[id].n_voltages = 1;
 981                         pmic->desc[id].ops = &palmas_ops_extreg;
 982                         pmic->desc[id].enable_reg =
 983                                         PALMAS_BASE_TO_REG(PALMAS_RESOURCE_BASE,
 984                                                 palmas_regs_info[id].ctrl_addr);
 985                         pmic->desc[id].enable_mask =
 986                                         PALMAS_REGEN1_CTRL_MODE_ACTIVE;
 987                 }
 988
 989                 if (pdata)
 990                         config.init_data = pdata->reg_data[id];
 991                 else
 992                         config.init_data = NULL;
 993
 994                 pmic->desc[id].supply_name = palmas_regs_info[id].sname;
 995                 config.of_node = palmas_matches[id].of_node;
 996
 997                 rdev = regulator_register(&pmic->desc[id], &config);
 998                 if (IS_ERR(rdev)) {
 999                         dev_err(&pdev->dev,
1000                                 "failed to register %s regulator\n",
1001                                 pdev->name);
1002                         ret = PTR_ERR(rdev);
1003                         goto err_unregister_regulator;
1004                 }
1005
1006                 /* Save regulator for cleanup */
1007                 pmic->rdev[id] = rdev;
1008
1009                 /* Initialise sleep/init values from platform data */
1010                 if (pdata) {
1011                         reg_init = pdata->reg_init[id];
1012                         if (reg_init) {
1013                                 if (id < PALMAS_REG_REGEN1)
1014                                         ret = palmas_ldo_init(palmas,
1015                                                         id, reg_init);
1016                                 else
1017                                         ret = palmas_extreg_init(palmas,
1018                                                         id, reg_init);
1019                                 if (ret) {
1020                                         regulator_unregister(pmic->rdev[id]);
1021                                         goto err_unregister_regulator;
1022                                 }
1023                         }
1024                 }
1025         }
1026
1027
1028         return 0;
1029
1030 err_unregister_regulator:
1031         while (--id >= 0)
1032                 regulator_unregister(pmic->rdev[id]);
1033         return ret;
1034 }
1035
1036 static int palmas_regulators_remove(struct platform_device *pdev)
1037 {
1038         struct palmas_pmic *pmic = platform_get_drvdata(pdev);
1039         int id;
1040
1041         for (id = 0; id < PALMAS_NUM_REGS; id++)
1042                 regulator_unregister(pmic->rdev[id]);
1043         return 0;
1044 }
1045
1046 static struct of_device_id of_palmas_match_tbl[] = {
1047         { .compatible = "ti,palmas-pmic", },
1048         { .compatible = "ti,twl6035-pmic", },
1049         { .compatible = "ti,twl6036-pmic", },
1050         { .compatible = "ti,twl6037-pmic", },
1051         { .compatible = "ti,tps65913-pmic", },
1052         { .compatible = "ti,tps65914-pmic", },
1053         { .compatible = "ti,tps80036-pmic", },
1054         { /* end */ }
1055 };
1056
1057 static struct platform_driver palmas_driver = {
1058         .driver = {
1059                 .name = "palmas-pmic",
1060                 .of_match_table = of_palmas_match_tbl,
1061                 .owner = THIS_MODULE,
1062         },
1063         .probe = palmas_regulators_probe,
1064         .remove = palmas_regulators_remove,
1065 };
1066
1067 static int __init palmas_init(void)
1068 {
1069         return platform_driver_register(&palmas_driver);
1070 }
1071 subsys_initcall(palmas_init);
1072
1073 static void __exit palmas_exit(void)
1074 {
1075         platform_driver_unregister(&palmas_driver);
1076 }
1077 module_exit(palmas_exit);
1078
1079 MODULE_AUTHOR("Graeme Gregory <[email protected]>");
1080 MODULE_DESCRIPTION("Palmas voltage regulator driver");
1081 MODULE_LICENSE("GPL");
1082 MODULE_ALIAS("platform:palmas-pmic");
1083 MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);