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 <gg@slimlogic.co.uk>
   7  * Author: Ian Lartey <ian@slimlogic.co.uk>
   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         int     sleep_id;
  37 };
  38
  39 static const struct regulator_linear_range smps_low_ranges[] = {
  40         REGULATOR_LINEAR_RANGE(500000, 0x1, 0x6, 0),
  41         REGULATOR_LINEAR_RANGE(510000, 0x7, 0x79, 10000),
  42         REGULATOR_LINEAR_RANGE(1650000, 0x7A, 0x7f, 0),
  43 };
  44
  45 static const struct regulator_linear_range smps_high_ranges[] = {
  46         REGULATOR_LINEAR_RANGE(1000000, 0x1, 0x6, 0),
  47         REGULATOR_LINEAR_RANGE(1020000, 0x7, 0x79, 20000),
  48         REGULATOR_LINEAR_RANGE(3300000, 0x7A, 0x7f, 0),
  49 };
  50
  51 static const struct regs_info palmas_regs_info[] = {
  52         {
  53                 .name           = "SMPS12",
  54                 .sname          = "smps1-in",
  55                 .vsel_addr      = PALMAS_SMPS12_VOLTAGE,
  56                 .ctrl_addr      = PALMAS_SMPS12_CTRL,
  57                 .tstep_addr     = PALMAS_SMPS12_TSTEP,
  58                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_SMPS12,
  59         },
  60         {
  61                 .name           = "SMPS123",
  62                 .sname          = "smps1-in",
  63                 .vsel_addr      = PALMAS_SMPS12_VOLTAGE,
  64                 .ctrl_addr      = PALMAS_SMPS12_CTRL,
  65                 .tstep_addr     = PALMAS_SMPS12_TSTEP,
  66                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_SMPS12,
  67         },
  68         {
  69                 .name           = "SMPS3",
  70                 .sname          = "smps3-in",
  71                 .vsel_addr      = PALMAS_SMPS3_VOLTAGE,
  72                 .ctrl_addr      = PALMAS_SMPS3_CTRL,
  73                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_SMPS3,
  74         },
  75         {
  76                 .name           = "SMPS45",
  77                 .sname          = "smps4-in",
  78                 .vsel_addr      = PALMAS_SMPS45_VOLTAGE,
  79                 .ctrl_addr      = PALMAS_SMPS45_CTRL,
  80                 .tstep_addr     = PALMAS_SMPS45_TSTEP,
  81                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_SMPS45,
  82         },
  83         {
  84                 .name           = "SMPS457",
  85                 .sname          = "smps4-in",
  86                 .vsel_addr      = PALMAS_SMPS45_VOLTAGE,
  87                 .ctrl_addr      = PALMAS_SMPS45_CTRL,
  88                 .tstep_addr     = PALMAS_SMPS45_TSTEP,
  89                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_SMPS45,
  90         },
  91         {
  92                 .name           = "SMPS6",
  93                 .sname          = "smps6-in",
  94                 .vsel_addr      = PALMAS_SMPS6_VOLTAGE,
  95                 .ctrl_addr      = PALMAS_SMPS6_CTRL,
  96                 .tstep_addr     = PALMAS_SMPS6_TSTEP,
  97                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_SMPS6,
  98         },
  99         {
 100                 .name           = "SMPS7",
 101                 .sname          = "smps7-in",
 102                 .vsel_addr      = PALMAS_SMPS7_VOLTAGE,
 103                 .ctrl_addr      = PALMAS_SMPS7_CTRL,
 104                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_SMPS7,
 105         },
 106         {
 107                 .name           = "SMPS8",
 108                 .sname          = "smps8-in",
 109                 .vsel_addr      = PALMAS_SMPS8_VOLTAGE,
 110                 .ctrl_addr      = PALMAS_SMPS8_CTRL,
 111                 .tstep_addr     = PALMAS_SMPS8_TSTEP,
 112                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_SMPS8,
 113         },
 114         {
 115                 .name           = "SMPS9",
 116                 .sname          = "smps9-in",
 117                 .vsel_addr      = PALMAS_SMPS9_VOLTAGE,
 118                 .ctrl_addr      = PALMAS_SMPS9_CTRL,
 119                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_SMPS9,
 120         },
 121         {
 122                 .name           = "SMPS10_OUT2",
 123                 .sname          = "smps10-in",
 124                 .ctrl_addr      = PALMAS_SMPS10_CTRL,
 125                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_SMPS10,
 126         },
 127         {
 128                 .name           = "SMPS10_OUT1",
 129                 .sname          = "smps10-out2",
 130                 .ctrl_addr      = PALMAS_SMPS10_CTRL,
 131                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_SMPS10,
 132         },
 133         {
 134                 .name           = "LDO1",
 135                 .sname          = "ldo1-in",
 136                 .vsel_addr      = PALMAS_LDO1_VOLTAGE,
 137                 .ctrl_addr      = PALMAS_LDO1_CTRL,
 138                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_LDO1,
 139         },
 140         {
 141                 .name           = "LDO2",
 142                 .sname          = "ldo2-in",
 143                 .vsel_addr      = PALMAS_LDO2_VOLTAGE,
 144                 .ctrl_addr      = PALMAS_LDO2_CTRL,
 145                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_LDO2,
 146         },
 147         {
 148                 .name           = "LDO3",
 149                 .sname          = "ldo3-in",
 150                 .vsel_addr      = PALMAS_LDO3_VOLTAGE,
 151                 .ctrl_addr      = PALMAS_LDO3_CTRL,
 152                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_LDO3,
 153         },
 154         {
 155                 .name           = "LDO4",
 156                 .sname          = "ldo4-in",
 157                 .vsel_addr      = PALMAS_LDO4_VOLTAGE,
 158                 .ctrl_addr      = PALMAS_LDO4_CTRL,
 159                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_LDO4,
 160         },
 161         {
 162                 .name           = "LDO5",
 163                 .sname          = "ldo5-in",
 164                 .vsel_addr      = PALMAS_LDO5_VOLTAGE,
 165                 .ctrl_addr      = PALMAS_LDO5_CTRL,
 166                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_LDO5,
 167         },
 168         {
 169                 .name           = "LDO6",
 170                 .sname          = "ldo6-in",
 171                 .vsel_addr      = PALMAS_LDO6_VOLTAGE,
 172                 .ctrl_addr      = PALMAS_LDO6_CTRL,
 173                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_LDO6,
 174         },
 175         {
 176                 .name           = "LDO7",
 177                 .sname          = "ldo7-in",
 178                 .vsel_addr      = PALMAS_LDO7_VOLTAGE,
 179                 .ctrl_addr      = PALMAS_LDO7_CTRL,
 180                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_LDO7,
 181         },
 182         {
 183                 .name           = "LDO8",
 184                 .sname          = "ldo8-in",
 185                 .vsel_addr      = PALMAS_LDO8_VOLTAGE,
 186                 .ctrl_addr      = PALMAS_LDO8_CTRL,
 187                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_LDO8,
 188         },
 189         {
 190                 .name           = "LDO9",
 191                 .sname          = "ldo9-in",
 192                 .vsel_addr      = PALMAS_LDO9_VOLTAGE,
 193                 .ctrl_addr      = PALMAS_LDO9_CTRL,
 194                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_LDO9,
 195         },
 196         {
 197                 .name           = "LDOLN",
 198                 .sname          = "ldoln-in",
 199                 .vsel_addr      = PALMAS_LDOLN_VOLTAGE,
 200                 .ctrl_addr      = PALMAS_LDOLN_CTRL,
 201                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_LDOLN,
 202         },
 203         {
 204                 .name           = "LDOUSB",
 205                 .sname          = "ldousb-in",
 206                 .vsel_addr      = PALMAS_LDOUSB_VOLTAGE,
 207                 .ctrl_addr      = PALMAS_LDOUSB_CTRL,
 208                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_LDOUSB,
 209         },
 210         {
 211                 .name           = "REGEN1",
 212                 .ctrl_addr      = PALMAS_REGEN1_CTRL,
 213                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_REGEN1,
 214         },
 215         {
 216                 .name           = "REGEN2",
 217                 .ctrl_addr      = PALMAS_REGEN2_CTRL,
 218                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_REGEN2,
 219         },
 220         {
 221                 .name           = "REGEN3",
 222                 .ctrl_addr      = PALMAS_REGEN3_CTRL,
 223                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_REGEN3,
 224         },
 225         {
 226                 .name           = "SYSEN1",
 227                 .ctrl_addr      = PALMAS_SYSEN1_CTRL,
 228                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_SYSEN1,
 229         },
 230         {
 231                 .name           = "SYSEN2",
 232                 .ctrl_addr      = PALMAS_SYSEN2_CTRL,
 233                 .sleep_id       = PALMAS_EXTERNAL_REQSTR_ID_SYSEN2,
 234         },
 235 };
 236
 237 static unsigned int palmas_smps_ramp_delay[4] = {0, 10000, 5000, 2500};
 238
 239 #define SMPS_CTRL_MODE_OFF              0x00
 240 #define SMPS_CTRL_MODE_ON               0x01
 241 #define SMPS_CTRL_MODE_ECO              0x02
 242 #define SMPS_CTRL_MODE_PWM              0x03
 243
 244 #define PALMAS_SMPS_NUM_VOLTAGES        122
 245 #define PALMAS_SMPS10_NUM_VOLTAGES      2
 246 #define PALMAS_LDO_NUM_VOLTAGES         50
 247
 248 #define SMPS10_VSEL                     (1<<3)
 249 #define SMPS10_BOOST_EN                 (1<<2)
 250 #define SMPS10_BYPASS_EN                (1<<1)
 251 #define SMPS10_SWITCH_EN                (1<<0)
 252
 253 #define REGULATOR_SLAVE                 0
 254
 255 static int palmas_smps_read(struct palmas *palmas, unsigned int reg,
 256                 unsigned int *dest)
 257 {
 258         unsigned int addr;
 259
 260         addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
 261
 262         return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
 263 }
 264
 265 static int palmas_smps_write(struct palmas *palmas, unsigned int reg,
 266                 unsigned int value)
 267 {
 268         unsigned int addr;
 269
 270         addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
 271
 272         return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
 273 }
 274
 275 static int palmas_ldo_read(struct palmas *palmas, unsigned int reg,
 276                 unsigned int *dest)
 277 {
 278         unsigned int addr;
 279
 280         addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
 281
 282         return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
 283 }
 284
 285 static int palmas_ldo_write(struct palmas *palmas, unsigned int reg,
 286                 unsigned int value)
 287 {
 288         unsigned int addr;
 289
 290         addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
 291
 292         return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
 293 }
 294
 295 static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode)
 296 {
 297         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 298         int id = rdev_get_id(dev);
 299         unsigned int reg;
 300         bool rail_enable = true;
 301
 302         palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 303         reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 304
 305         if (reg == SMPS_CTRL_MODE_OFF)
 306                 rail_enable = false;
 307
 308         switch (mode) {
 309         case REGULATOR_MODE_NORMAL:
 310                 reg |= SMPS_CTRL_MODE_ON;
 311                 break;
 312         case REGULATOR_MODE_IDLE:
 313                 reg |= SMPS_CTRL_MODE_ECO;
 314                 break;
 315         case REGULATOR_MODE_FAST:
 316                 reg |= SMPS_CTRL_MODE_PWM;
 317                 break;
 318         default:
 319                 return -EINVAL;
 320         }
 321
 322         pmic->current_reg_mode[id] = reg & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 323         if (rail_enable)
 324                 palmas_smps_write(pmic->palmas,
 325                         palmas_regs_info[id].ctrl_addr, reg);
 326         return 0;
 327 }
 328
 329 static unsigned int palmas_get_mode_smps(struct regulator_dev *dev)
 330 {
 331         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 332         int id = rdev_get_id(dev);
 333         unsigned int reg;
 334
 335         reg = pmic->current_reg_mode[id] & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 336
 337         switch (reg) {
 338         case SMPS_CTRL_MODE_ON:
 339                 return REGULATOR_MODE_NORMAL;
 340         case SMPS_CTRL_MODE_ECO:
 341                 return REGULATOR_MODE_IDLE;
 342         case SMPS_CTRL_MODE_PWM:
 343                 return REGULATOR_MODE_FAST;
 344         }
 345
 346         return 0;
 347 }
 348
 349 static int palmas_smps_set_ramp_delay(struct regulator_dev *rdev,
 350                  int ramp_delay)
 351 {
 352         struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
 353         int id = rdev_get_id(rdev);
 354         unsigned int reg = 0;
 355         unsigned int addr = palmas_regs_info[id].tstep_addr;
 356         int ret;
 357
 358         /* SMPS3 and SMPS7 do not have tstep_addr setting */
 359         switch (id) {
 360         case PALMAS_REG_SMPS3:
 361         case PALMAS_REG_SMPS7:
 362                 return 0;
 363         }
 364
 365         if (ramp_delay <= 0)
 366                 reg = 0;
 367         else if (ramp_delay <= 2500)
 368                 reg = 3;
 369         else if (ramp_delay <= 5000)
 370                 reg = 2;
 371         else
 372                 reg = 1;
 373
 374         ret = palmas_smps_write(pmic->palmas, addr, reg);
 375         if (ret < 0) {
 376                 dev_err(pmic->palmas->dev, "TSTEP write failed: %d\n", ret);
 377                 return ret;
 378         }
 379
 380         pmic->ramp_delay[id] = palmas_smps_ramp_delay[reg];
 381         return ret;
 382 }
 383
 384 static struct regulator_ops palmas_ops_smps = {
 385         .is_enabled             = regulator_is_enabled_regmap,
 386         .enable                 = regulator_enable_regmap,
 387         .disable                = regulator_disable_regmap,
 388         .set_mode               = palmas_set_mode_smps,
 389         .get_mode               = palmas_get_mode_smps,
 390         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 391         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 392         .list_voltage           = regulator_list_voltage_linear_range,
 393         .map_voltage            = regulator_map_voltage_linear_range,
 394         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 395         .set_ramp_delay         = palmas_smps_set_ramp_delay,
 396 };
 397
 398 static struct regulator_ops palmas_ops_ext_control_smps = {
 399         .set_mode               = palmas_set_mode_smps,
 400         .get_mode               = palmas_get_mode_smps,
 401         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 402         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 403         .list_voltage           = regulator_list_voltage_linear_range,
 404         .map_voltage            = regulator_map_voltage_linear_range,
 405         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 406         .set_ramp_delay         = palmas_smps_set_ramp_delay,
 407 };
 408
 409 static struct regulator_ops palmas_ops_smps10 = {
 410         .is_enabled             = regulator_is_enabled_regmap,
 411         .enable                 = regulator_enable_regmap,
 412         .disable                = regulator_disable_regmap,
 413         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 414         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 415         .list_voltage           = regulator_list_voltage_linear,
 416         .map_voltage            = regulator_map_voltage_linear,
 417         .set_bypass             = regulator_set_bypass_regmap,
 418         .get_bypass             = regulator_get_bypass_regmap,
 419 };
 420
 421 static int palmas_is_enabled_ldo(struct regulator_dev *dev)
 422 {
 423         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 424         int id = rdev_get_id(dev);
 425         unsigned int reg;
 426
 427         palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 428
 429         reg &= PALMAS_LDO1_CTRL_STATUS;
 430
 431         return !!(reg);
 432 }
 433
 434 static struct regulator_ops palmas_ops_ldo = {
 435         .is_enabled             = palmas_is_enabled_ldo,
 436         .enable                 = regulator_enable_regmap,
 437         .disable                = regulator_disable_regmap,
 438         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 439         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 440         .list_voltage           = regulator_list_voltage_linear,
 441         .map_voltage            = regulator_map_voltage_linear,
 442 };
 443
 444 static struct regulator_ops palmas_ops_ext_control_ldo = {
 445         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 446         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 447         .list_voltage           = regulator_list_voltage_linear,
 448         .map_voltage            = regulator_map_voltage_linear,
 449 };
 450
 451 static struct regulator_ops palmas_ops_extreg = {
 452         .is_enabled             = regulator_is_enabled_regmap,
 453         .enable                 = regulator_enable_regmap,
 454         .disable                = regulator_disable_regmap,
 455 };
 456
 457 static struct regulator_ops palmas_ops_ext_control_extreg = {
 458 };
 459
 460 static int palmas_regulator_config_external(struct palmas *palmas, int id,
 461                 struct palmas_reg_init *reg_init)
 462 {
 463         int sleep_id = palmas_regs_info[id].sleep_id;
 464         int ret;
 465
 466         ret = palmas_ext_control_req_config(palmas, sleep_id,
 467                                         reg_init->roof_floor, true);
 468         if (ret < 0)
 469                 dev_err(palmas->dev,
 470                         "Ext control config for regulator %d failed %d\n",
 471                         id, ret);
 472         return ret;
 473 }
 474
 475 /*
 476  * setup the hardware based sleep configuration of the SMPS/LDO regulators
 477  * from the platform data. This is different to the software based control
 478  * supported by the regulator framework as it is controlled by toggling
 479  * pins on the PMIC such as PREQ, SYSEN, ...
 480  */
 481 static int palmas_smps_init(struct palmas *palmas, int id,
 482                 struct palmas_reg_init *reg_init)
 483 {
 484         unsigned int reg;
 485         unsigned int addr;
 486         int ret;
 487
 488         addr = palmas_regs_info[id].ctrl_addr;
 489
 490         ret = palmas_smps_read(palmas, addr, &reg);
 491         if (ret)
 492                 return ret;
 493
 494         switch (id) {
 495         case PALMAS_REG_SMPS10_OUT1:
 496         case PALMAS_REG_SMPS10_OUT2:
 497                 reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK;
 498                 if (reg_init->mode_sleep)
 499                         reg |= reg_init->mode_sleep <<
 500                                         PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT;
 501                 break;
 502         default:
 503                 if (reg_init->warm_reset)
 504                         reg |= PALMAS_SMPS12_CTRL_WR_S;
 505                 else
 506                         reg &= ~PALMAS_SMPS12_CTRL_WR_S;
 507
 508                 if (reg_init->roof_floor)
 509                         reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
 510                 else
 511                         reg &= ~PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
 512
 513                 reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK;
 514                 if (reg_init->mode_sleep)
 515                         reg |= reg_init->mode_sleep <<
 516                                         PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT;
 517         }
 518
 519         ret = palmas_smps_write(palmas, addr, reg);
 520         if (ret)
 521                 return ret;
 522
 523         if (palmas_regs_info[id].vsel_addr && reg_init->vsel) {
 524                 addr = palmas_regs_info[id].vsel_addr;
 525
 526                 reg = reg_init->vsel;
 527
 528                 ret = palmas_smps_write(palmas, addr, reg);
 529                 if (ret)
 530                         return ret;
 531         }
 532
 533         if (reg_init->roof_floor && (id != PALMAS_REG_SMPS10_OUT1) &&
 534                         (id != PALMAS_REG_SMPS10_OUT2)) {
 535                 /* Enable externally controlled regulator */
 536                 addr = palmas_regs_info[id].ctrl_addr;
 537                 ret = palmas_smps_read(palmas, addr, &reg);
 538                 if (ret < 0)
 539                         return ret;
 540
 541                 if (!(reg & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK)) {
 542                         reg |= SMPS_CTRL_MODE_ON;
 543                         ret = palmas_smps_write(palmas, addr, reg);
 544                         if (ret < 0)
 545                                 return ret;
 546                 }
 547                 return palmas_regulator_config_external(palmas, id, reg_init);
 548         }
 549         return 0;
 550 }
 551
 552 static int palmas_ldo_init(struct palmas *palmas, int id,
 553                 struct palmas_reg_init *reg_init)
 554 {
 555         unsigned int reg;
 556         unsigned int addr;
 557         int ret;
 558
 559         addr = palmas_regs_info[id].ctrl_addr;
 560
 561         ret = palmas_ldo_read(palmas, addr, &reg);
 562         if (ret)
 563                 return ret;
 564
 565         if (reg_init->warm_reset)
 566                 reg |= PALMAS_LDO1_CTRL_WR_S;
 567         else
 568                 reg &= ~PALMAS_LDO1_CTRL_WR_S;
 569
 570         if (reg_init->mode_sleep)
 571                 reg |= PALMAS_LDO1_CTRL_MODE_SLEEP;
 572         else
 573                 reg &= ~PALMAS_LDO1_CTRL_MODE_SLEEP;
 574
 575         ret = palmas_ldo_write(palmas, addr, reg);
 576         if (ret)
 577                 return ret;
 578
 579         if (reg_init->roof_floor) {
 580                 /* Enable externally controlled regulator */
 581                 addr = palmas_regs_info[id].ctrl_addr;
 582                 ret = palmas_update_bits(palmas, PALMAS_LDO_BASE,
 583                                 addr, PALMAS_LDO1_CTRL_MODE_ACTIVE,
 584                                 PALMAS_LDO1_CTRL_MODE_ACTIVE);
 585                 if (ret < 0) {
 586                         dev_err(palmas->dev,
 587                                 "LDO Register 0x%02x update failed %d\n",
 588                                 addr, ret);
 589                         return ret;
 590                 }
 591                 return palmas_regulator_config_external(palmas, id, reg_init);
 592         }
 593         return 0;
 594 }
 595
 596 static int palmas_extreg_init(struct palmas *palmas, int id,
 597                 struct palmas_reg_init *reg_init)
 598 {
 599         unsigned int addr;
 600         int ret;
 601         unsigned int val = 0;
 602
 603         addr = palmas_regs_info[id].ctrl_addr;
 604
 605         if (reg_init->mode_sleep)
 606                 val = PALMAS_REGEN1_CTRL_MODE_SLEEP;
 607
 608         ret = palmas_update_bits(palmas, PALMAS_RESOURCE_BASE,
 609                         addr, PALMAS_REGEN1_CTRL_MODE_SLEEP, val);
 610         if (ret < 0) {
 611                 dev_err(palmas->dev, "Resource reg 0x%02x update failed %d\n",
 612                         addr, ret);
 613                 return ret;
 614         }
 615
 616         if (reg_init->roof_floor) {
 617                 /* Enable externally controlled regulator */
 618                 addr = palmas_regs_info[id].ctrl_addr;
 619                 ret = palmas_update_bits(palmas, PALMAS_RESOURCE_BASE,
 620                                 addr, PALMAS_REGEN1_CTRL_MODE_ACTIVE,
 621                                 PALMAS_REGEN1_CTRL_MODE_ACTIVE);
 622                 if (ret < 0) {
 623                         dev_err(palmas->dev,
 624                                 "Resource Register 0x%02x update failed %d\n",
 625                                 addr, ret);
 626                         return ret;
 627                 }
 628                 return palmas_regulator_config_external(palmas, id, reg_init);
 629         }
 630         return 0;
 631 }
 632
 633 static void palmas_enable_ldo8_track(struct palmas *palmas)
 634 {
 635         unsigned int reg;
 636         unsigned int addr;
 637         int ret;
 638
 639         addr = palmas_regs_info[PALMAS_REG_LDO8].ctrl_addr;
 640
 641         ret = palmas_ldo_read(palmas, addr, &reg);
 642         if (ret) {
 643                 dev_err(palmas->dev, "Error in reading ldo8 control reg\n");
 644                 return;
 645         }
 646
 647         reg |= PALMAS_LDO8_CTRL_LDO_TRACKING_EN;
 648         ret = palmas_ldo_write(palmas, addr, reg);
 649         if (ret < 0) {
 650                 dev_err(palmas->dev, "Error in enabling tracking mode\n");
 651                 return;
 652         }
 653         /*
 654          * When SMPS45 is set to off and LDO8 tracking is enabled, the LDO8
 655          * output is defined by the LDO8_VOLTAGE.VSEL register divided by two,
 656          * and can be set from 0.45 to 1.65 V.
 657          */
 658         addr = palmas_regs_info[PALMAS_REG_LDO8].vsel_addr;
 659         ret = palmas_ldo_read(palmas, addr, &reg);
 660         if (ret) {
 661                 dev_err(palmas->dev, "Error in reading ldo8 voltage reg\n");
 662                 return;
 663         }
 664
 665         reg = (reg << 1) & PALMAS_LDO8_VOLTAGE_VSEL_MASK;
 666         ret = palmas_ldo_write(palmas, addr, reg);
 667         if (ret < 0)
 668                 dev_err(palmas->dev, "Error in setting ldo8 voltage reg\n");
 669
 670         return;
 671 }
 672
 673 static struct of_regulator_match palmas_matches[] = {
 674         { .name = "smps12", },
 675         { .name = "smps123", },
 676         { .name = "smps3", },
 677         { .name = "smps45", },
 678         { .name = "smps457", },
 679         { .name = "smps6", },
 680         { .name = "smps7", },
 681         { .name = "smps8", },
 682         { .name = "smps9", },
 683         { .name = "smps10_out2", },
 684         { .name = "smps10_out1", },
 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_get_child_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                 ret = of_property_read_u32(palmas_matches[idx].of_node,
 741                                               "ti,roof-floor", &prop);
 742                 /* EINVAL: Property not found */
 743                 if (ret != -EINVAL) {
 744                         int econtrol;
 745
 746                         /* use default value, when no value is specified */
 747                         econtrol = PALMAS_EXT_CONTROL_NSLEEP;
 748                         if (!ret) {
 749                                 switch (prop) {
 750                                 case 1:
 751                                         econtrol = PALMAS_EXT_CONTROL_ENABLE1;
 752                                         break;
 753                                 case 2:
 754                                         econtrol = PALMAS_EXT_CONTROL_ENABLE2;
 755                                         break;
 756                                 case 3:
 757                                         econtrol = PALMAS_EXT_CONTROL_NSLEEP;
 758                                         break;
 759                                 default:
 760                                         WARN_ON(1);
 761                                         dev_warn(dev,
 762                                         "%s: Invalid roof-floor option: %u\n",
 763                                              palmas_matches[idx].name, prop);
 764                                         break;
 765                                 }
 766                         }
 767                         pdata->reg_init[idx]->roof_floor = econtrol;
 768                 }
 769
 770                 ret = of_property_read_u32(palmas_matches[idx].of_node,
 771                                 "ti,mode-sleep", &prop);
 772                 if (!ret)
 773                         pdata->reg_init[idx]->mode_sleep = prop;
 774
 775                 ret = of_property_read_bool(palmas_matches[idx].of_node,
 776                                             "ti,smps-range");
 777                 if (ret)
 778                         pdata->reg_init[idx]->vsel =
 779                                 PALMAS_SMPS12_VOLTAGE_RANGE;
 780
 781                 if (idx == PALMAS_REG_LDO8)
 782                         pdata->enable_ldo8_tracking = of_property_read_bool(
 783                                                 palmas_matches[idx].of_node,
 784                                                 "ti,enable-ldo8-tracking");
 785         }
 786
 787         pdata->ldo6_vibrator = of_property_read_bool(node, "ti,ldo6-vibrator");
 788 }
 789
 790
 791 static int palmas_regulators_probe(struct platform_device *pdev)
 792 {
 793         struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
 794         struct palmas_pmic_platform_data *pdata = dev_get_platdata(&pdev->dev);
 795         struct device_node *node = pdev->dev.of_node;
 796         struct regulator_dev *rdev;
 797         struct regulator_config config = { };
 798         struct palmas_pmic *pmic;
 799         struct palmas_reg_init *reg_init;
 800         int id = 0, ret;
 801         unsigned int addr, reg;
 802
 803         if (node && !pdata) {
 804                 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 805
 806                 if (!pdata)
 807                         return -ENOMEM;
 808
 809                 palmas_dt_to_pdata(&pdev->dev, node, pdata);
 810         }
 811
 812         pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
 813         if (!pmic)
 814                 return -ENOMEM;
 815
 816         pmic->dev = &pdev->dev;
 817         pmic->palmas = palmas;
 818         palmas->pmic = pmic;
 819         platform_set_drvdata(pdev, pmic);
 820
 821         ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, &reg);
 822         if (ret)
 823                 return ret;
 824
 825         if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN)
 826                 pmic->smps123 = 1;
 827
 828         if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN)
 829                 pmic->smps457 = 1;
 830
 831         config.regmap = palmas->regmap[REGULATOR_SLAVE];
 832         config.dev = &pdev->dev;
 833         config.driver_data = pmic;
 834
 835         for (id = 0; id < PALMAS_REG_LDO1; id++) {
 836                 bool ramp_delay_support = false;
 837
 838                 /*
 839                  * Miss out regulators which are not available due
 840                  * to slaving configurations.
 841                  */
 842                 switch (id) {
 843                 case PALMAS_REG_SMPS12:
 844                 case PALMAS_REG_SMPS3:
 845                         if (pmic->smps123)
 846                                 continue;
 847                         if (id == PALMAS_REG_SMPS12)
 848                                 ramp_delay_support = true;
 849                         break;
 850                 case PALMAS_REG_SMPS123:
 851                         if (!pmic->smps123)
 852                                 continue;
 853                         ramp_delay_support = true;
 854                         break;
 855                 case PALMAS_REG_SMPS45:
 856                 case PALMAS_REG_SMPS7:
 857                         if (pmic->smps457)
 858                                 continue;
 859                         if (id == PALMAS_REG_SMPS45)
 860                                 ramp_delay_support = true;
 861                         break;
 862                 case PALMAS_REG_SMPS457:
 863                         if (!pmic->smps457)
 864                                 continue;
 865                         ramp_delay_support = true;
 866                         break;
 867                 case PALMAS_REG_SMPS10_OUT1:
 868                 case PALMAS_REG_SMPS10_OUT2:
 869                         if (!PALMAS_PMIC_HAS(palmas, SMPS10_BOOST))
 870                                 continue;
 871                 }
 872
 873                 if ((id == PALMAS_REG_SMPS6) || (id == PALMAS_REG_SMPS8))
 874                         ramp_delay_support = true;
 875
 876                 if (ramp_delay_support) {
 877                         addr = palmas_regs_info[id].tstep_addr;
 878                         ret = palmas_smps_read(pmic->palmas, addr, &reg);
 879                         if (ret < 0) {
 880                                 dev_err(&pdev->dev,
 881                                         "reading TSTEP reg failed: %d\n", ret);
 882                                 return ret;
 883                         }
 884                         pmic->desc[id].ramp_delay =
 885                                         palmas_smps_ramp_delay[reg & 0x3];
 886                         pmic->ramp_delay[id] = pmic->desc[id].ramp_delay;
 887                 }
 888
 889                 /* Initialise sleep/init values from platform data */
 890                 if (pdata && pdata->reg_init[id]) {
 891                         reg_init = pdata->reg_init[id];
 892                         ret = palmas_smps_init(palmas, id, reg_init);
 893                         if (ret)
 894                                 return ret;
 895                 } else {
 896                         reg_init = NULL;
 897                 }
 898
 899                 /* Register the regulators */
 900                 pmic->desc[id].name = palmas_regs_info[id].name;
 901                 pmic->desc[id].id = id;
 902
 903                 switch (id) {
 904                 case PALMAS_REG_SMPS10_OUT1:
 905                 case PALMAS_REG_SMPS10_OUT2:
 906                         pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES;
 907                         pmic->desc[id].ops = &palmas_ops_smps10;
 908                         pmic->desc[id].vsel_reg =
 909                                         PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 910                                                         PALMAS_SMPS10_CTRL);
 911                         pmic->desc[id].vsel_mask = SMPS10_VSEL;
 912                         pmic->desc[id].enable_reg =
 913                                         PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 914                                                         PALMAS_SMPS10_CTRL);
 915                         if (id == PALMAS_REG_SMPS10_OUT1)
 916                                 pmic->desc[id].enable_mask = SMPS10_SWITCH_EN;
 917                         else
 918                                 pmic->desc[id].enable_mask = SMPS10_BOOST_EN;
 919                         pmic->desc[id].bypass_reg =
 920                                         PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 921                                                         PALMAS_SMPS10_CTRL);
 922                         pmic->desc[id].bypass_mask = SMPS10_BYPASS_EN;
 923                         pmic->desc[id].min_uV = 3750000;
 924                         pmic->desc[id].uV_step = 1250000;
 925                         break;
 926                 default:
 927                         /*
 928                          * Read and store the RANGE bit for later use
 929                          * This must be done before regulator is probed,
 930                          * otherwise we error in probe with unsupportable
 931                          * ranges. Read the current smps mode for later use.
 932                          */
 933                         addr = palmas_regs_info[id].vsel_addr;
 934                         pmic->desc[id].n_linear_ranges = 3;
 935
 936                         ret = palmas_smps_read(pmic->palmas, addr, &reg);
 937                         if (ret)
 938                                 return ret;
 939                         if (reg & PALMAS_SMPS12_VOLTAGE_RANGE)
 940                                 pmic->range[id] = 1;
 941                         if (pmic->range[id])
 942                                 pmic->desc[id].linear_ranges = smps_high_ranges;
 943                         else
 944                                 pmic->desc[id].linear_ranges = smps_low_ranges;
 945
 946                         if (reg_init && reg_init->roof_floor)
 947                                 pmic->desc[id].ops =
 948                                                 &palmas_ops_ext_control_smps;
 949                         else
 950                                 pmic->desc[id].ops = &palmas_ops_smps;
 951                         pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES;
 952                         pmic->desc[id].vsel_reg =
 953                                         PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 954                                                 palmas_regs_info[id].vsel_addr);
 955                         pmic->desc[id].vsel_mask =
 956                                         PALMAS_SMPS12_VOLTAGE_VSEL_MASK;
 957
 958                         /* Read the smps mode for later use. */
 959                         addr = palmas_regs_info[id].ctrl_addr;
 960                         ret = palmas_smps_read(pmic->palmas, addr, &reg);
 961                         if (ret)
 962                                 return ret;
 963                         pmic->current_reg_mode[id] = reg &
 964                                         PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 965                 }
 966
 967                 pmic->desc[id].type = REGULATOR_VOLTAGE;
 968                 pmic->desc[id].owner = THIS_MODULE;
 969
 970                 if (pdata)
 971                         config.init_data = pdata->reg_data[id];
 972                 else
 973                         config.init_data = NULL;
 974
 975                 pmic->desc[id].supply_name = palmas_regs_info[id].sname;
 976                 config.of_node = palmas_matches[id].of_node;
 977
 978                 rdev = devm_regulator_register(&pdev->dev, &pmic->desc[id],
 979                                                &config);
 980                 if (IS_ERR(rdev)) {
 981                         dev_err(&pdev->dev,
 982                                 "failed to register %s regulator\n",
 983                                 pdev->name);
 984                         return PTR_ERR(rdev);
 985                 }
 986
 987                 /* Save regulator for cleanup */
 988                 pmic->rdev[id] = rdev;
 989         }
 990
 991         /* Start this loop from the id left from previous loop */
 992         for (; id < PALMAS_NUM_REGS; id++) {
 993                 if (pdata && pdata->reg_init[id])
 994                         reg_init = pdata->reg_init[id];
 995                 else
 996                         reg_init = NULL;
 997
 998                 /* Miss out regulators which are not available due
 999                  * to alternate functions.
1000                  */
1001
1002                 /* Register the regulators */
1003                 pmic->desc[id].name = palmas_regs_info[id].name;
1004                 pmic->desc[id].id = id;
1005                 pmic->desc[id].type = REGULATOR_VOLTAGE;
1006                 pmic->desc[id].owner = THIS_MODULE;
1007
1008                 if (id < PALMAS_REG_REGEN1) {
1009                         pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;
1010                         if (reg_init && reg_init->roof_floor)
1011                                 pmic->desc[id].ops =
1012                                         &palmas_ops_ext_control_ldo;
1013                         else
1014                                 pmic->desc[id].ops = &palmas_ops_ldo;
1015                         pmic->desc[id].min_uV = 900000;
1016                         pmic->desc[id].uV_step = 50000;
1017                         pmic->desc[id].linear_min_sel = 1;
1018                         pmic->desc[id].enable_time = 500;
1019                         pmic->desc[id].vsel_reg =
1020                                         PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
1021                                                 palmas_regs_info[id].vsel_addr);
1022                         pmic->desc[id].vsel_mask =
1023                                         PALMAS_LDO1_VOLTAGE_VSEL_MASK;
1024                         pmic->desc[id].enable_reg =
1025                                         PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
1026                                                 palmas_regs_info[id].ctrl_addr);
1027                         pmic->desc[id].enable_mask =
1028                                         PALMAS_LDO1_CTRL_MODE_ACTIVE;
1029
1030                         /* Check if LDO8 is in tracking mode or not */
1031                         if (pdata && (id == PALMAS_REG_LDO8) &&
1032                                         pdata->enable_ldo8_tracking) {
1033                                 palmas_enable_ldo8_track(palmas);
1034                                 pmic->desc[id].min_uV = 450000;
1035                                 pmic->desc[id].uV_step = 25000;
1036                         }
1037
1038                         /* LOD6 in vibrator mode will have enable time 2000us */
1039                         if (pdata && pdata->ldo6_vibrator &&
1040                                 (id == PALMAS_REG_LDO6))
1041                                 pmic->desc[id].enable_time = 2000;
1042                 } else {
1043                         pmic->desc[id].n_voltages = 1;
1044                         if (reg_init && reg_init->roof_floor)
1045                                 pmic->desc[id].ops =
1046                                         &palmas_ops_ext_control_extreg;
1047                         else
1048                                 pmic->desc[id].ops = &palmas_ops_extreg;
1049                         pmic->desc[id].enable_reg =
1050                                         PALMAS_BASE_TO_REG(PALMAS_RESOURCE_BASE,
1051                                                 palmas_regs_info[id].ctrl_addr);
1052                         pmic->desc[id].enable_mask =
1053                                         PALMAS_REGEN1_CTRL_MODE_ACTIVE;
1054                 }
1055
1056                 if (pdata)
1057                         config.init_data = pdata->reg_data[id];
1058                 else
1059                         config.init_data = NULL;
1060
1061                 pmic->desc[id].supply_name = palmas_regs_info[id].sname;
1062                 config.of_node = palmas_matches[id].of_node;
1063
1064                 rdev = devm_regulator_register(&pdev->dev, &pmic->desc[id],
1065                                                &config);
1066                 if (IS_ERR(rdev)) {
1067                         dev_err(&pdev->dev,
1068                                 "failed to register %s regulator\n",
1069                                 pdev->name);
1070                         return PTR_ERR(rdev);
1071                 }
1072
1073                 /* Save regulator for cleanup */
1074                 pmic->rdev[id] = rdev;
1075
1076                 /* Initialise sleep/init values from platform data */
1077                 if (pdata) {
1078                         reg_init = pdata->reg_init[id];
1079                         if (reg_init) {
1080                                 if (id < PALMAS_REG_REGEN1)
1081                                         ret = palmas_ldo_init(palmas,
1082                                                         id, reg_init);
1083                                 else
1084                                         ret = palmas_extreg_init(palmas,
1085                                                         id, reg_init);
1086                                 if (ret)
1087                                         return ret;
1088                         }
1089                 }
1090         }
1091
1092
1093         return 0;
1094 }
1095
1096 static const struct of_device_id of_palmas_match_tbl[] = {
1097         { .compatible = "ti,palmas-pmic", },
1098         { .compatible = "ti,twl6035-pmic", },
1099         { .compatible = "ti,twl6036-pmic", },
1100         { .compatible = "ti,twl6037-pmic", },
1101         { .compatible = "ti,tps65913-pmic", },
1102         { .compatible = "ti,tps65914-pmic", },
1103         { .compatible = "ti,tps80036-pmic", },
1104         { .compatible = "ti,tps659038-pmic", },
1105         { /* end */ }
1106 };
1107
1108 static struct platform_driver palmas_driver = {
1109         .driver = {
1110                 .name = "palmas-pmic",
1111                 .of_match_table = of_palmas_match_tbl,
1112                 .owner = THIS_MODULE,
1113         },
1114         .probe = palmas_regulators_probe,
1115 };
1116
1117 static int __init palmas_init(void)
1118 {
1119         return platform_driver_register(&palmas_driver);
1120 }
1121 subsys_initcall(palmas_init);
1122
1123 static void __exit palmas_exit(void)
1124 {
1125         platform_driver_unregister(&palmas_driver);
1126 }
1127 module_exit(palmas_exit);
1128
1129 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
1130 MODULE_DESCRIPTION("Palmas voltage regulator driver");
1131 MODULE_LICENSE("GPL");
1132 MODULE_ALIAS("platform:palmas-pmic");
1133 MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);