linux/drivers/regulator/tps65910-regulator.c
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   1/*
   2 * tps65910.c  --  TI tps65910
   3 *
   4 * Copyright 2010 Texas Instruments Inc.
   5 *
   6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
   7 * Author: Jorge Eduardo Candelaria <jedu@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/gpio.h>
  25#include <linux/mfd/tps65910.h>
  26#include <linux/regulator/of_regulator.h>
  27
  28#define TPS65910_SUPPLY_STATE_ENABLED   0x1
  29#define EXT_SLEEP_CONTROL (TPS65910_SLEEP_CONTROL_EXT_INPUT_EN1 |       \
  30                        TPS65910_SLEEP_CONTROL_EXT_INPUT_EN2 |          \
  31                        TPS65910_SLEEP_CONTROL_EXT_INPUT_EN3 |          \
  32                        TPS65911_SLEEP_CONTROL_EXT_INPUT_SLEEP)
  33
  34/* supported VIO voltages in microvolts */
  35static const unsigned int VIO_VSEL_table[] = {
  36        1500000, 1800000, 2500000, 3300000,
  37};
  38
  39/* VSEL tables for TPS65910 specific LDOs and dcdc's */
  40
  41/* supported VRTC voltages in microvolts */
  42static const unsigned int VRTC_VSEL_table[] = {
  43        1800000,
  44};
  45
  46/* supported VDD3 voltages in microvolts */
  47static const unsigned int VDD3_VSEL_table[] = {
  48        5000000,
  49};
  50
  51/* supported VDIG1 voltages in microvolts */
  52static const unsigned int VDIG1_VSEL_table[] = {
  53        1200000, 1500000, 1800000, 2700000,
  54};
  55
  56/* supported VDIG2 voltages in microvolts */
  57static const unsigned int VDIG2_VSEL_table[] = {
  58        1000000, 1100000, 1200000, 1800000,
  59};
  60
  61/* supported VPLL voltages in microvolts */
  62static const unsigned int VPLL_VSEL_table[] = {
  63        1000000, 1100000, 1800000, 2500000,
  64};
  65
  66/* supported VDAC voltages in microvolts */
  67static const unsigned int VDAC_VSEL_table[] = {
  68        1800000, 2600000, 2800000, 2850000,
  69};
  70
  71/* supported VAUX1 voltages in microvolts */
  72static const unsigned int VAUX1_VSEL_table[] = {
  73        1800000, 2500000, 2800000, 2850000,
  74};
  75
  76/* supported VAUX2 voltages in microvolts */
  77static const unsigned int VAUX2_VSEL_table[] = {
  78        1800000, 2800000, 2900000, 3300000,
  79};
  80
  81/* supported VAUX33 voltages in microvolts */
  82static const unsigned int VAUX33_VSEL_table[] = {
  83        1800000, 2000000, 2800000, 3300000,
  84};
  85
  86/* supported VMMC voltages in microvolts */
  87static const unsigned int VMMC_VSEL_table[] = {
  88        1800000, 2800000, 3000000, 3300000,
  89};
  90
  91struct tps_info {
  92        const char *name;
  93        const char *vin_name;
  94        u8 n_voltages;
  95        const unsigned int *voltage_table;
  96        int enable_time_us;
  97};
  98
  99static struct tps_info tps65910_regs[] = {
 100        {
 101                .name = "vrtc",
 102                .vin_name = "vcc7",
 103                .n_voltages = ARRAY_SIZE(VRTC_VSEL_table),
 104                .voltage_table = VRTC_VSEL_table,
 105                .enable_time_us = 2200,
 106        },
 107        {
 108                .name = "vio",
 109                .vin_name = "vccio",
 110                .n_voltages = ARRAY_SIZE(VIO_VSEL_table),
 111                .voltage_table = VIO_VSEL_table,
 112                .enable_time_us = 350,
 113        },
 114        {
 115                .name = "vdd1",
 116                .vin_name = "vcc1",
 117                .enable_time_us = 350,
 118        },
 119        {
 120                .name = "vdd2",
 121                .vin_name = "vcc2",
 122                .enable_time_us = 350,
 123        },
 124        {
 125                .name = "vdd3",
 126                .n_voltages = ARRAY_SIZE(VDD3_VSEL_table),
 127                .voltage_table = VDD3_VSEL_table,
 128                .enable_time_us = 200,
 129        },
 130        {
 131                .name = "vdig1",
 132                .vin_name = "vcc6",
 133                .n_voltages = ARRAY_SIZE(VDIG1_VSEL_table),
 134                .voltage_table = VDIG1_VSEL_table,
 135                .enable_time_us = 100,
 136        },
 137        {
 138                .name = "vdig2",
 139                .vin_name = "vcc6",
 140                .n_voltages = ARRAY_SIZE(VDIG2_VSEL_table),
 141                .voltage_table = VDIG2_VSEL_table,
 142                .enable_time_us = 100,
 143        },
 144        {
 145                .name = "vpll",
 146                .vin_name = "vcc5",
 147                .n_voltages = ARRAY_SIZE(VPLL_VSEL_table),
 148                .voltage_table = VPLL_VSEL_table,
 149                .enable_time_us = 100,
 150        },
 151        {
 152                .name = "vdac",
 153                .vin_name = "vcc5",
 154                .n_voltages = ARRAY_SIZE(VDAC_VSEL_table),
 155                .voltage_table = VDAC_VSEL_table,
 156                .enable_time_us = 100,
 157        },
 158        {
 159                .name = "vaux1",
 160                .vin_name = "vcc4",
 161                .n_voltages = ARRAY_SIZE(VAUX1_VSEL_table),
 162                .voltage_table = VAUX1_VSEL_table,
 163                .enable_time_us = 100,
 164        },
 165        {
 166                .name = "vaux2",
 167                .vin_name = "vcc4",
 168                .n_voltages = ARRAY_SIZE(VAUX2_VSEL_table),
 169                .voltage_table = VAUX2_VSEL_table,
 170                .enable_time_us = 100,
 171        },
 172        {
 173                .name = "vaux33",
 174                .vin_name = "vcc3",
 175                .n_voltages = ARRAY_SIZE(VAUX33_VSEL_table),
 176                .voltage_table = VAUX33_VSEL_table,
 177                .enable_time_us = 100,
 178        },
 179        {
 180                .name = "vmmc",
 181                .vin_name = "vcc3",
 182                .n_voltages = ARRAY_SIZE(VMMC_VSEL_table),
 183                .voltage_table = VMMC_VSEL_table,
 184                .enable_time_us = 100,
 185        },
 186};
 187
 188static struct tps_info tps65911_regs[] = {
 189        {
 190                .name = "vrtc",
 191                .vin_name = "vcc7",
 192                .enable_time_us = 2200,
 193        },
 194        {
 195                .name = "vio",
 196                .vin_name = "vccio",
 197                .n_voltages = ARRAY_SIZE(VIO_VSEL_table),
 198                .voltage_table = VIO_VSEL_table,
 199                .enable_time_us = 350,
 200        },
 201        {
 202                .name = "vdd1",
 203                .vin_name = "vcc1",
 204                .n_voltages = 0x4C,
 205                .enable_time_us = 350,
 206        },
 207        {
 208                .name = "vdd2",
 209                .vin_name = "vcc2",
 210                .n_voltages = 0x4C,
 211                .enable_time_us = 350,
 212        },
 213        {
 214                .name = "vddctrl",
 215                .n_voltages = 0x44,
 216                .enable_time_us = 900,
 217        },
 218        {
 219                .name = "ldo1",
 220                .vin_name = "vcc6",
 221                .n_voltages = 0x33,
 222                .enable_time_us = 420,
 223        },
 224        {
 225                .name = "ldo2",
 226                .vin_name = "vcc6",
 227                .n_voltages = 0x33,
 228                .enable_time_us = 420,
 229        },
 230        {
 231                .name = "ldo3",
 232                .vin_name = "vcc5",
 233                .n_voltages = 0x1A,
 234                .enable_time_us = 230,
 235        },
 236        {
 237                .name = "ldo4",
 238                .vin_name = "vcc5",
 239                .n_voltages = 0x33,
 240                .enable_time_us = 230,
 241        },
 242        {
 243                .name = "ldo5",
 244                .vin_name = "vcc4",
 245                .n_voltages = 0x1A,
 246                .enable_time_us = 230,
 247        },
 248        {
 249                .name = "ldo6",
 250                .vin_name = "vcc3",
 251                .n_voltages = 0x1A,
 252                .enable_time_us = 230,
 253        },
 254        {
 255                .name = "ldo7",
 256                .vin_name = "vcc3",
 257                .n_voltages = 0x1A,
 258                .enable_time_us = 230,
 259        },
 260        {
 261                .name = "ldo8",
 262                .vin_name = "vcc3",
 263                .n_voltages = 0x1A,
 264                .enable_time_us = 230,
 265        },
 266};
 267
 268#define EXT_CONTROL_REG_BITS(id, regs_offs, bits) (((regs_offs) << 8) | (bits))
 269static unsigned int tps65910_ext_sleep_control[] = {
 270        0,
 271        EXT_CONTROL_REG_BITS(VIO,    1, 0),
 272        EXT_CONTROL_REG_BITS(VDD1,   1, 1),
 273        EXT_CONTROL_REG_BITS(VDD2,   1, 2),
 274        EXT_CONTROL_REG_BITS(VDD3,   1, 3),
 275        EXT_CONTROL_REG_BITS(VDIG1,  0, 1),
 276        EXT_CONTROL_REG_BITS(VDIG2,  0, 2),
 277        EXT_CONTROL_REG_BITS(VPLL,   0, 6),
 278        EXT_CONTROL_REG_BITS(VDAC,   0, 7),
 279        EXT_CONTROL_REG_BITS(VAUX1,  0, 3),
 280        EXT_CONTROL_REG_BITS(VAUX2,  0, 4),
 281        EXT_CONTROL_REG_BITS(VAUX33, 0, 5),
 282        EXT_CONTROL_REG_BITS(VMMC,   0, 0),
 283};
 284
 285static unsigned int tps65911_ext_sleep_control[] = {
 286        0,
 287        EXT_CONTROL_REG_BITS(VIO,     1, 0),
 288        EXT_CONTROL_REG_BITS(VDD1,    1, 1),
 289        EXT_CONTROL_REG_BITS(VDD2,    1, 2),
 290        EXT_CONTROL_REG_BITS(VDDCTRL, 1, 3),
 291        EXT_CONTROL_REG_BITS(LDO1,    0, 1),
 292        EXT_CONTROL_REG_BITS(LDO2,    0, 2),
 293        EXT_CONTROL_REG_BITS(LDO3,    0, 7),
 294        EXT_CONTROL_REG_BITS(LDO4,    0, 6),
 295        EXT_CONTROL_REG_BITS(LDO5,    0, 3),
 296        EXT_CONTROL_REG_BITS(LDO6,    0, 0),
 297        EXT_CONTROL_REG_BITS(LDO7,    0, 5),
 298        EXT_CONTROL_REG_BITS(LDO8,    0, 4),
 299};
 300
 301struct tps65910_reg {
 302        struct regulator_desc *desc;
 303        struct tps65910 *mfd;
 304        struct regulator_dev **rdev;
 305        struct tps_info **info;
 306        int num_regulators;
 307        int mode;
 308        int  (*get_ctrl_reg)(int);
 309        unsigned int *ext_sleep_control;
 310        unsigned int board_ext_control[TPS65910_NUM_REGS];
 311};
 312
 313static int tps65910_get_ctrl_register(int id)
 314{
 315        switch (id) {
 316        case TPS65910_REG_VRTC:
 317                return TPS65910_VRTC;
 318        case TPS65910_REG_VIO:
 319                return TPS65910_VIO;
 320        case TPS65910_REG_VDD1:
 321                return TPS65910_VDD1;
 322        case TPS65910_REG_VDD2:
 323                return TPS65910_VDD2;
 324        case TPS65910_REG_VDD3:
 325                return TPS65910_VDD3;
 326        case TPS65910_REG_VDIG1:
 327                return TPS65910_VDIG1;
 328        case TPS65910_REG_VDIG2:
 329                return TPS65910_VDIG2;
 330        case TPS65910_REG_VPLL:
 331                return TPS65910_VPLL;
 332        case TPS65910_REG_VDAC:
 333                return TPS65910_VDAC;
 334        case TPS65910_REG_VAUX1:
 335                return TPS65910_VAUX1;
 336        case TPS65910_REG_VAUX2:
 337                return TPS65910_VAUX2;
 338        case TPS65910_REG_VAUX33:
 339                return TPS65910_VAUX33;
 340        case TPS65910_REG_VMMC:
 341                return TPS65910_VMMC;
 342        default:
 343                return -EINVAL;
 344        }
 345}
 346
 347static int tps65911_get_ctrl_register(int id)
 348{
 349        switch (id) {
 350        case TPS65910_REG_VRTC:
 351                return TPS65910_VRTC;
 352        case TPS65910_REG_VIO:
 353                return TPS65910_VIO;
 354        case TPS65910_REG_VDD1:
 355                return TPS65910_VDD1;
 356        case TPS65910_REG_VDD2:
 357                return TPS65910_VDD2;
 358        case TPS65911_REG_VDDCTRL:
 359                return TPS65911_VDDCTRL;
 360        case TPS65911_REG_LDO1:
 361                return TPS65911_LDO1;
 362        case TPS65911_REG_LDO2:
 363                return TPS65911_LDO2;
 364        case TPS65911_REG_LDO3:
 365                return TPS65911_LDO3;
 366        case TPS65911_REG_LDO4:
 367                return TPS65911_LDO4;
 368        case TPS65911_REG_LDO5:
 369                return TPS65911_LDO5;
 370        case TPS65911_REG_LDO6:
 371                return TPS65911_LDO6;
 372        case TPS65911_REG_LDO7:
 373                return TPS65911_LDO7;
 374        case TPS65911_REG_LDO8:
 375                return TPS65911_LDO8;
 376        default:
 377                return -EINVAL;
 378        }
 379}
 380
 381static int tps65910_set_mode(struct regulator_dev *dev, unsigned int mode)
 382{
 383        struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 384        struct tps65910 *mfd = pmic->mfd;
 385        int reg, value, id = rdev_get_id(dev);
 386
 387        reg = pmic->get_ctrl_reg(id);
 388        if (reg < 0)
 389                return reg;
 390
 391        switch (mode) {
 392        case REGULATOR_MODE_NORMAL:
 393                return tps65910_reg_update_bits(pmic->mfd, reg,
 394                                                LDO_ST_MODE_BIT | LDO_ST_ON_BIT,
 395                                                LDO_ST_ON_BIT);
 396        case REGULATOR_MODE_IDLE:
 397                value = LDO_ST_ON_BIT | LDO_ST_MODE_BIT;
 398                return tps65910_reg_set_bits(mfd, reg, value);
 399        case REGULATOR_MODE_STANDBY:
 400                return tps65910_reg_clear_bits(mfd, reg, LDO_ST_ON_BIT);
 401        }
 402
 403        return -EINVAL;
 404}
 405
 406static unsigned int tps65910_get_mode(struct regulator_dev *dev)
 407{
 408        struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 409        int ret, reg, value, id = rdev_get_id(dev);
 410
 411        reg = pmic->get_ctrl_reg(id);
 412        if (reg < 0)
 413                return reg;
 414
 415        ret = tps65910_reg_read(pmic->mfd, reg, &value);
 416        if (ret < 0)
 417                return ret;
 418
 419        if (!(value & LDO_ST_ON_BIT))
 420                return REGULATOR_MODE_STANDBY;
 421        else if (value & LDO_ST_MODE_BIT)
 422                return REGULATOR_MODE_IDLE;
 423        else
 424                return REGULATOR_MODE_NORMAL;
 425}
 426
 427static int tps65910_get_voltage_dcdc_sel(struct regulator_dev *dev)
 428{
 429        struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 430        int ret, id = rdev_get_id(dev);
 431        int opvsel = 0, srvsel = 0, vselmax = 0, mult = 0, sr = 0;
 432
 433        switch (id) {
 434        case TPS65910_REG_VDD1:
 435                ret = tps65910_reg_read(pmic->mfd, TPS65910_VDD1_OP, &opvsel);
 436                if (ret < 0)
 437                        return ret;
 438                ret = tps65910_reg_read(pmic->mfd, TPS65910_VDD1, &mult);
 439                if (ret < 0)
 440                        return ret;
 441                mult = (mult & VDD1_VGAIN_SEL_MASK) >> VDD1_VGAIN_SEL_SHIFT;
 442                ret = tps65910_reg_read(pmic->mfd, TPS65910_VDD1_SR, &srvsel);
 443                if (ret < 0)
 444                        return ret;
 445                sr = opvsel & VDD1_OP_CMD_MASK;
 446                opvsel &= VDD1_OP_SEL_MASK;
 447                srvsel &= VDD1_SR_SEL_MASK;
 448                vselmax = 75;
 449                break;
 450        case TPS65910_REG_VDD2:
 451                ret = tps65910_reg_read(pmic->mfd, TPS65910_VDD2_OP, &opvsel);
 452                if (ret < 0)
 453                        return ret;
 454                ret = tps65910_reg_read(pmic->mfd, TPS65910_VDD2, &mult);
 455                if (ret < 0)
 456                        return ret;
 457                mult = (mult & VDD2_VGAIN_SEL_MASK) >> VDD2_VGAIN_SEL_SHIFT;
 458                ret = tps65910_reg_read(pmic->mfd, TPS65910_VDD2_SR, &srvsel);
 459                if (ret < 0)
 460                        return ret;
 461                sr = opvsel & VDD2_OP_CMD_MASK;
 462                opvsel &= VDD2_OP_SEL_MASK;
 463                srvsel &= VDD2_SR_SEL_MASK;
 464                vselmax = 75;
 465                break;
 466        case TPS65911_REG_VDDCTRL:
 467                ret = tps65910_reg_read(pmic->mfd, TPS65911_VDDCTRL_OP,
 468                                        &opvsel);
 469                if (ret < 0)
 470                        return ret;
 471                ret = tps65910_reg_read(pmic->mfd, TPS65911_VDDCTRL_SR,
 472                                        &srvsel);
 473                if (ret < 0)
 474                        return ret;
 475                sr = opvsel & VDDCTRL_OP_CMD_MASK;
 476                opvsel &= VDDCTRL_OP_SEL_MASK;
 477                srvsel &= VDDCTRL_SR_SEL_MASK;
 478                vselmax = 64;
 479                break;
 480        }
 481
 482        /* multiplier 0 == 1 but 2,3 normal */
 483        if (!mult)
 484                mult=1;
 485
 486        if (sr) {
 487                /* normalise to valid range */
 488                if (srvsel < 3)
 489                        srvsel = 3;
 490                if (srvsel > vselmax)
 491                        srvsel = vselmax;
 492                return srvsel - 3;
 493        } else {
 494
 495                /* normalise to valid range*/
 496                if (opvsel < 3)
 497                        opvsel = 3;
 498                if (opvsel > vselmax)
 499                        opvsel = vselmax;
 500                return opvsel - 3;
 501        }
 502        return -EINVAL;
 503}
 504
 505static int tps65910_get_voltage_sel(struct regulator_dev *dev)
 506{
 507        struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 508        int ret, reg, value, id = rdev_get_id(dev);
 509
 510        reg = pmic->get_ctrl_reg(id);
 511        if (reg < 0)
 512                return reg;
 513
 514        ret = tps65910_reg_read(pmic->mfd, reg, &value);
 515        if (ret < 0)
 516                return ret;
 517
 518        switch (id) {
 519        case TPS65910_REG_VIO:
 520        case TPS65910_REG_VDIG1:
 521        case TPS65910_REG_VDIG2:
 522        case TPS65910_REG_VPLL:
 523        case TPS65910_REG_VDAC:
 524        case TPS65910_REG_VAUX1:
 525        case TPS65910_REG_VAUX2:
 526        case TPS65910_REG_VAUX33:
 527        case TPS65910_REG_VMMC:
 528                value &= LDO_SEL_MASK;
 529                value >>= LDO_SEL_SHIFT;
 530                break;
 531        default:
 532                return -EINVAL;
 533        }
 534
 535        return value;
 536}
 537
 538static int tps65910_get_voltage_vdd3(struct regulator_dev *dev)
 539{
 540        return dev->desc->volt_table[0];
 541}
 542
 543static int tps65911_get_voltage_sel(struct regulator_dev *dev)
 544{
 545        struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 546        int ret, id = rdev_get_id(dev);
 547        unsigned int value, reg;
 548
 549        reg = pmic->get_ctrl_reg(id);
 550
 551        ret = tps65910_reg_read(pmic->mfd, reg, &value);
 552        if (ret < 0)
 553                return ret;
 554
 555        switch (id) {
 556        case TPS65911_REG_LDO1:
 557        case TPS65911_REG_LDO2:
 558        case TPS65911_REG_LDO4:
 559                value &= LDO1_SEL_MASK;
 560                value >>= LDO_SEL_SHIFT;
 561                break;
 562        case TPS65911_REG_LDO3:
 563        case TPS65911_REG_LDO5:
 564        case TPS65911_REG_LDO6:
 565        case TPS65911_REG_LDO7:
 566        case TPS65911_REG_LDO8:
 567                value &= LDO3_SEL_MASK;
 568                value >>= LDO_SEL_SHIFT;
 569                break;
 570        case TPS65910_REG_VIO:
 571                value &= LDO_SEL_MASK;
 572                value >>= LDO_SEL_SHIFT;
 573                break;
 574        default:
 575                return -EINVAL;
 576        }
 577
 578        return value;
 579}
 580
 581static int tps65910_set_voltage_dcdc_sel(struct regulator_dev *dev,
 582                                         unsigned selector)
 583{
 584        struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 585        int id = rdev_get_id(dev), vsel;
 586        int dcdc_mult = 0;
 587
 588        switch (id) {
 589        case TPS65910_REG_VDD1:
 590                dcdc_mult = (selector / VDD1_2_NUM_VOLT_FINE) + 1;
 591                if (dcdc_mult == 1)
 592                        dcdc_mult--;
 593                vsel = (selector % VDD1_2_NUM_VOLT_FINE) + 3;
 594
 595                tps65910_reg_update_bits(pmic->mfd, TPS65910_VDD1,
 596                                         VDD1_VGAIN_SEL_MASK,
 597                                         dcdc_mult << VDD1_VGAIN_SEL_SHIFT);
 598                tps65910_reg_write(pmic->mfd, TPS65910_VDD1_OP, vsel);
 599                break;
 600        case TPS65910_REG_VDD2:
 601                dcdc_mult = (selector / VDD1_2_NUM_VOLT_FINE) + 1;
 602                if (dcdc_mult == 1)
 603                        dcdc_mult--;
 604                vsel = (selector % VDD1_2_NUM_VOLT_FINE) + 3;
 605
 606                tps65910_reg_update_bits(pmic->mfd, TPS65910_VDD2,
 607                                         VDD1_VGAIN_SEL_MASK,
 608                                         dcdc_mult << VDD2_VGAIN_SEL_SHIFT);
 609                tps65910_reg_write(pmic->mfd, TPS65910_VDD2_OP, vsel);
 610                break;
 611        case TPS65911_REG_VDDCTRL:
 612                vsel = selector + 3;
 613                tps65910_reg_write(pmic->mfd, TPS65911_VDDCTRL_OP, vsel);
 614        }
 615
 616        return 0;
 617}
 618
 619static int tps65910_set_voltage_sel(struct regulator_dev *dev,
 620                                    unsigned selector)
 621{
 622        struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 623        int reg, id = rdev_get_id(dev);
 624
 625        reg = pmic->get_ctrl_reg(id);
 626        if (reg < 0)
 627                return reg;
 628
 629        switch (id) {
 630        case TPS65910_REG_VIO:
 631        case TPS65910_REG_VDIG1:
 632        case TPS65910_REG_VDIG2:
 633        case TPS65910_REG_VPLL:
 634        case TPS65910_REG_VDAC:
 635        case TPS65910_REG_VAUX1:
 636        case TPS65910_REG_VAUX2:
 637        case TPS65910_REG_VAUX33:
 638        case TPS65910_REG_VMMC:
 639                return tps65910_reg_update_bits(pmic->mfd, reg, LDO_SEL_MASK,
 640                                                selector << LDO_SEL_SHIFT);
 641        }
 642
 643        return -EINVAL;
 644}
 645
 646static int tps65911_set_voltage_sel(struct regulator_dev *dev,
 647                                    unsigned selector)
 648{
 649        struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 650        int reg, id = rdev_get_id(dev);
 651
 652        reg = pmic->get_ctrl_reg(id);
 653        if (reg < 0)
 654                return reg;
 655
 656        switch (id) {
 657        case TPS65911_REG_LDO1:
 658        case TPS65911_REG_LDO2:
 659        case TPS65911_REG_LDO4:
 660                return tps65910_reg_update_bits(pmic->mfd, reg, LDO1_SEL_MASK,
 661                                                selector << LDO_SEL_SHIFT);
 662        case TPS65911_REG_LDO3:
 663        case TPS65911_REG_LDO5:
 664        case TPS65911_REG_LDO6:
 665        case TPS65911_REG_LDO7:
 666        case TPS65911_REG_LDO8:
 667                return tps65910_reg_update_bits(pmic->mfd, reg, LDO3_SEL_MASK,
 668                                                selector << LDO_SEL_SHIFT);
 669        case TPS65910_REG_VIO:
 670                return tps65910_reg_update_bits(pmic->mfd, reg, LDO_SEL_MASK,
 671                                                selector << LDO_SEL_SHIFT);
 672        }
 673
 674        return -EINVAL;
 675}
 676
 677
 678static int tps65910_list_voltage_dcdc(struct regulator_dev *dev,
 679                                        unsigned selector)
 680{
 681        int volt, mult = 1, id = rdev_get_id(dev);
 682
 683        switch (id) {
 684        case TPS65910_REG_VDD1:
 685        case TPS65910_REG_VDD2:
 686                mult = (selector / VDD1_2_NUM_VOLT_FINE) + 1;
 687                volt = VDD1_2_MIN_VOLT +
 688                                (selector % VDD1_2_NUM_VOLT_FINE) * VDD1_2_OFFSET;
 689                break;
 690        case TPS65911_REG_VDDCTRL:
 691                volt = VDDCTRL_MIN_VOLT + (selector * VDDCTRL_OFFSET);
 692                break;
 693        default:
 694                BUG();
 695                return -EINVAL;
 696        }
 697
 698        return  volt * 100 * mult;
 699}
 700
 701static int tps65911_list_voltage(struct regulator_dev *dev, unsigned selector)
 702{
 703        struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 704        int step_mv = 0, id = rdev_get_id(dev);
 705
 706        switch(id) {
 707        case TPS65911_REG_LDO1:
 708        case TPS65911_REG_LDO2:
 709        case TPS65911_REG_LDO4:
 710                /* The first 5 values of the selector correspond to 1V */
 711                if (selector < 5)
 712                        selector = 0;
 713                else
 714                        selector -= 4;
 715
 716                step_mv = 50;
 717                break;
 718        case TPS65911_REG_LDO3:
 719        case TPS65911_REG_LDO5:
 720        case TPS65911_REG_LDO6:
 721        case TPS65911_REG_LDO7:
 722        case TPS65911_REG_LDO8:
 723                /* The first 3 values of the selector correspond to 1V */
 724                if (selector < 3)
 725                        selector = 0;
 726                else
 727                        selector -= 2;
 728
 729                step_mv = 100;
 730                break;
 731        case TPS65910_REG_VIO:
 732                return pmic->info[id]->voltage_table[selector];
 733        default:
 734                return -EINVAL;
 735        }
 736
 737        return (LDO_MIN_VOLT + selector * step_mv) * 1000;
 738}
 739
 740/* Regulator ops (except VRTC) */
 741static struct regulator_ops tps65910_ops_dcdc = {
 742        .is_enabled             = regulator_is_enabled_regmap,
 743        .enable                 = regulator_enable_regmap,
 744        .disable                = regulator_disable_regmap,
 745        .set_mode               = tps65910_set_mode,
 746        .get_mode               = tps65910_get_mode,
 747        .get_voltage_sel        = tps65910_get_voltage_dcdc_sel,
 748        .set_voltage_sel        = tps65910_set_voltage_dcdc_sel,
 749        .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 750        .list_voltage           = tps65910_list_voltage_dcdc,
 751        .map_voltage            = regulator_map_voltage_ascend,
 752};
 753
 754static struct regulator_ops tps65910_ops_vdd3 = {
 755        .is_enabled             = regulator_is_enabled_regmap,
 756        .enable                 = regulator_enable_regmap,
 757        .disable                = regulator_disable_regmap,
 758        .set_mode               = tps65910_set_mode,
 759        .get_mode               = tps65910_get_mode,
 760        .get_voltage            = tps65910_get_voltage_vdd3,
 761        .list_voltage           = regulator_list_voltage_table,
 762        .map_voltage            = regulator_map_voltage_ascend,
 763};
 764
 765static struct regulator_ops tps65910_ops = {
 766        .is_enabled             = regulator_is_enabled_regmap,
 767        .enable                 = regulator_enable_regmap,
 768        .disable                = regulator_disable_regmap,
 769        .set_mode               = tps65910_set_mode,
 770        .get_mode               = tps65910_get_mode,
 771        .get_voltage_sel        = tps65910_get_voltage_sel,
 772        .set_voltage_sel        = tps65910_set_voltage_sel,
 773        .list_voltage           = regulator_list_voltage_table,
 774        .map_voltage            = regulator_map_voltage_ascend,
 775};
 776
 777static struct regulator_ops tps65911_ops = {
 778        .is_enabled             = regulator_is_enabled_regmap,
 779        .enable                 = regulator_enable_regmap,
 780        .disable                = regulator_disable_regmap,
 781        .set_mode               = tps65910_set_mode,
 782        .get_mode               = tps65910_get_mode,
 783        .get_voltage_sel        = tps65911_get_voltage_sel,
 784        .set_voltage_sel        = tps65911_set_voltage_sel,
 785        .list_voltage           = tps65911_list_voltage,
 786        .map_voltage            = regulator_map_voltage_ascend,
 787};
 788
 789static int tps65910_set_ext_sleep_config(struct tps65910_reg *pmic,
 790                int id, int ext_sleep_config)
 791{
 792        struct tps65910 *mfd = pmic->mfd;
 793        u8 regoffs = (pmic->ext_sleep_control[id] >> 8) & 0xFF;
 794        u8 bit_pos = (1 << pmic->ext_sleep_control[id] & 0xFF);
 795        int ret;
 796
 797        /*
 798         * Regulator can not be control from multiple external input EN1, EN2
 799         * and EN3 together.
 800         */
 801        if (ext_sleep_config & EXT_SLEEP_CONTROL) {
 802                int en_count;
 803                en_count = ((ext_sleep_config &
 804                                TPS65910_SLEEP_CONTROL_EXT_INPUT_EN1) != 0);
 805                en_count += ((ext_sleep_config &
 806                                TPS65910_SLEEP_CONTROL_EXT_INPUT_EN2) != 0);
 807                en_count += ((ext_sleep_config &
 808                                TPS65910_SLEEP_CONTROL_EXT_INPUT_EN3) != 0);
 809                en_count += ((ext_sleep_config &
 810                                TPS65911_SLEEP_CONTROL_EXT_INPUT_SLEEP) != 0);
 811                if (en_count > 1) {
 812                        dev_err(mfd->dev,
 813                                "External sleep control flag is not proper\n");
 814                        return -EINVAL;
 815                }
 816        }
 817
 818        pmic->board_ext_control[id] = ext_sleep_config;
 819
 820        /* External EN1 control */
 821        if (ext_sleep_config & TPS65910_SLEEP_CONTROL_EXT_INPUT_EN1)
 822                ret = tps65910_reg_set_bits(mfd,
 823                                TPS65910_EN1_LDO_ASS + regoffs, bit_pos);
 824        else
 825                ret = tps65910_reg_clear_bits(mfd,
 826                                TPS65910_EN1_LDO_ASS + regoffs, bit_pos);
 827        if (ret < 0) {
 828                dev_err(mfd->dev,
 829                        "Error in configuring external control EN1\n");
 830                return ret;
 831        }
 832
 833        /* External EN2 control */
 834        if (ext_sleep_config & TPS65910_SLEEP_CONTROL_EXT_INPUT_EN2)
 835                ret = tps65910_reg_set_bits(mfd,
 836                                TPS65910_EN2_LDO_ASS + regoffs, bit_pos);
 837        else
 838                ret = tps65910_reg_clear_bits(mfd,
 839                                TPS65910_EN2_LDO_ASS + regoffs, bit_pos);
 840        if (ret < 0) {
 841                dev_err(mfd->dev,
 842                        "Error in configuring external control EN2\n");
 843                return ret;
 844        }
 845
 846        /* External EN3 control for TPS65910 LDO only */
 847        if ((tps65910_chip_id(mfd) == TPS65910) &&
 848                        (id >= TPS65910_REG_VDIG1)) {
 849                if (ext_sleep_config & TPS65910_SLEEP_CONTROL_EXT_INPUT_EN3)
 850                        ret = tps65910_reg_set_bits(mfd,
 851                                TPS65910_EN3_LDO_ASS + regoffs, bit_pos);
 852                else
 853                        ret = tps65910_reg_clear_bits(mfd,
 854                                TPS65910_EN3_LDO_ASS + regoffs, bit_pos);
 855                if (ret < 0) {
 856                        dev_err(mfd->dev,
 857                                "Error in configuring external control EN3\n");
 858                        return ret;
 859                }
 860        }
 861
 862        /* Return if no external control is selected */
 863        if (!(ext_sleep_config & EXT_SLEEP_CONTROL)) {
 864                /* Clear all sleep controls */
 865                ret = tps65910_reg_clear_bits(mfd,
 866                        TPS65910_SLEEP_KEEP_LDO_ON + regoffs, bit_pos);
 867                if (!ret)
 868                        ret = tps65910_reg_clear_bits(mfd,
 869                                TPS65910_SLEEP_SET_LDO_OFF + regoffs, bit_pos);
 870                if (ret < 0)
 871                        dev_err(mfd->dev,
 872                                "Error in configuring SLEEP register\n");
 873                return ret;
 874        }
 875
 876        /*
 877         * For regulator that has separate operational and sleep register make
 878         * sure that operational is used and clear sleep register to turn
 879         * regulator off when external control is inactive
 880         */
 881        if ((id == TPS65910_REG_VDD1) ||
 882                (id == TPS65910_REG_VDD2) ||
 883                        ((id == TPS65911_REG_VDDCTRL) &&
 884                                (tps65910_chip_id(mfd) == TPS65911))) {
 885                int op_reg_add = pmic->get_ctrl_reg(id) + 1;
 886                int sr_reg_add = pmic->get_ctrl_reg(id) + 2;
 887                int opvsel, srvsel;
 888
 889                ret = tps65910_reg_read(pmic->mfd, op_reg_add, &opvsel);
 890                if (ret < 0)
 891                        return ret;
 892                ret = tps65910_reg_read(pmic->mfd, sr_reg_add, &srvsel);
 893                if (ret < 0)
 894                        return ret;
 895
 896                if (opvsel & VDD1_OP_CMD_MASK) {
 897                        u8 reg_val = srvsel & VDD1_OP_SEL_MASK;
 898
 899                        ret = tps65910_reg_write(pmic->mfd, op_reg_add,
 900                                                 reg_val);
 901                        if (ret < 0) {
 902                                dev_err(mfd->dev,
 903                                        "Error in configuring op register\n");
 904                                return ret;
 905                        }
 906                }
 907                ret = tps65910_reg_write(pmic->mfd, sr_reg_add, 0);
 908                if (ret < 0) {
 909                        dev_err(mfd->dev, "Error in settting sr register\n");
 910                        return ret;
 911                }
 912        }
 913
 914        ret = tps65910_reg_clear_bits(mfd,
 915                        TPS65910_SLEEP_KEEP_LDO_ON + regoffs, bit_pos);
 916        if (!ret) {
 917                if (ext_sleep_config & TPS65911_SLEEP_CONTROL_EXT_INPUT_SLEEP)
 918                        ret = tps65910_reg_set_bits(mfd,
 919                                TPS65910_SLEEP_SET_LDO_OFF + regoffs, bit_pos);
 920                else
 921                        ret = tps65910_reg_clear_bits(mfd,
 922                                TPS65910_SLEEP_SET_LDO_OFF + regoffs, bit_pos);
 923        }
 924        if (ret < 0)
 925                dev_err(mfd->dev,
 926                        "Error in configuring SLEEP register\n");
 927
 928        return ret;
 929}
 930
 931#ifdef CONFIG_OF
 932
 933static struct of_regulator_match tps65910_matches[] = {
 934        { .name = "vrtc",       .driver_data = (void *) &tps65910_regs[0] },
 935        { .name = "vio",        .driver_data = (void *) &tps65910_regs[1] },
 936        { .name = "vdd1",       .driver_data = (void *) &tps65910_regs[2] },
 937        { .name = "vdd2",       .driver_data = (void *) &tps65910_regs[3] },
 938        { .name = "vdd3",       .driver_data = (void *) &tps65910_regs[4] },
 939        { .name = "vdig1",      .driver_data = (void *) &tps65910_regs[5] },
 940        { .name = "vdig2",      .driver_data = (void *) &tps65910_regs[6] },
 941        { .name = "vpll",       .driver_data = (void *) &tps65910_regs[7] },
 942        { .name = "vdac",       .driver_data = (void *) &tps65910_regs[8] },
 943        { .name = "vaux1",      .driver_data = (void *) &tps65910_regs[9] },
 944        { .name = "vaux2",      .driver_data = (void *) &tps65910_regs[10] },
 945        { .name = "vaux33",     .driver_data = (void *) &tps65910_regs[11] },
 946        { .name = "vmmc",       .driver_data = (void *) &tps65910_regs[12] },
 947};
 948
 949static struct of_regulator_match tps65911_matches[] = {
 950        { .name = "vrtc",       .driver_data = (void *) &tps65911_regs[0] },
 951        { .name = "vio",        .driver_data = (void *) &tps65911_regs[1] },
 952        { .name = "vdd1",       .driver_data = (void *) &tps65911_regs[2] },
 953        { .name = "vdd2",       .driver_data = (void *) &tps65911_regs[3] },
 954        { .name = "vddctrl",    .driver_data = (void *) &tps65911_regs[4] },
 955        { .name = "ldo1",       .driver_data = (void *) &tps65911_regs[5] },
 956        { .name = "ldo2",       .driver_data = (void *) &tps65911_regs[6] },
 957        { .name = "ldo3",       .driver_data = (void *) &tps65911_regs[7] },
 958        { .name = "ldo4",       .driver_data = (void *) &tps65911_regs[8] },
 959        { .name = "ldo5",       .driver_data = (void *) &tps65911_regs[9] },
 960        { .name = "ldo6",       .driver_data = (void *) &tps65911_regs[10] },
 961        { .name = "ldo7",       .driver_data = (void *) &tps65911_regs[11] },
 962        { .name = "ldo8",       .driver_data = (void *) &tps65911_regs[12] },
 963};
 964
 965static struct tps65910_board *tps65910_parse_dt_reg_data(
 966                struct platform_device *pdev,
 967                struct of_regulator_match **tps65910_reg_matches)
 968{
 969        struct tps65910_board *pmic_plat_data;
 970        struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent);
 971        struct device_node *np, *regulators;
 972        struct of_regulator_match *matches;
 973        unsigned int prop;
 974        int idx = 0, ret, count;
 975
 976        pmic_plat_data = devm_kzalloc(&pdev->dev, sizeof(*pmic_plat_data),
 977                                        GFP_KERNEL);
 978
 979        if (!pmic_plat_data) {
 980                dev_err(&pdev->dev, "Failure to alloc pdata for regulators.\n");
 981                return NULL;
 982        }
 983
 984        np = of_node_get(pdev->dev.parent->of_node);
 985        regulators = of_find_node_by_name(np, "regulators");
 986        if (!regulators) {
 987                dev_err(&pdev->dev, "regulator node not found\n");
 988                return NULL;
 989        }
 990
 991        switch (tps65910_chip_id(tps65910)) {
 992        case TPS65910:
 993                count = ARRAY_SIZE(tps65910_matches);
 994                matches = tps65910_matches;
 995                break;
 996        case TPS65911:
 997                count = ARRAY_SIZE(tps65911_matches);
 998                matches = tps65911_matches;
 999                break;
1000        default:
1001                of_node_put(regulators);
1002                dev_err(&pdev->dev, "Invalid tps chip version\n");
1003                return NULL;
1004        }
1005
1006        ret = of_regulator_match(&pdev->dev, regulators, matches, count);
1007        of_node_put(regulators);
1008        if (ret < 0) {
1009                dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
1010                        ret);
1011                return NULL;
1012        }
1013
1014        *tps65910_reg_matches = matches;
1015
1016        for (idx = 0; idx < count; idx++) {
1017                if (!matches[idx].init_data || !matches[idx].of_node)
1018                        continue;
1019
1020                pmic_plat_data->tps65910_pmic_init_data[idx] =
1021                                                        matches[idx].init_data;
1022
1023                ret = of_property_read_u32(matches[idx].of_node,
1024                                "ti,regulator-ext-sleep-control", &prop);
1025                if (!ret)
1026                        pmic_plat_data->regulator_ext_sleep_control[idx] = prop;
1027
1028        }
1029
1030        return pmic_plat_data;
1031}
1032#else
1033static inline struct tps65910_board *tps65910_parse_dt_reg_data(
1034                        struct platform_device *pdev,
1035                        struct of_regulator_match **tps65910_reg_matches)
1036{
1037        *tps65910_reg_matches = NULL;
1038        return NULL;
1039}
1040#endif
1041
1042static int tps65910_probe(struct platform_device *pdev)
1043{
1044        struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent);
1045        struct regulator_config config = { };
1046        struct tps_info *info;
1047        struct regulator_init_data *reg_data;
1048        struct regulator_dev *rdev;
1049        struct tps65910_reg *pmic;
1050        struct tps65910_board *pmic_plat_data;
1051        struct of_regulator_match *tps65910_reg_matches = NULL;
1052        int i, err;
1053
1054        pmic_plat_data = dev_get_platdata(tps65910->dev);
1055        if (!pmic_plat_data && tps65910->dev->of_node)
1056                pmic_plat_data = tps65910_parse_dt_reg_data(pdev,
1057                                                &tps65910_reg_matches);
1058
1059        if (!pmic_plat_data) {
1060                dev_err(&pdev->dev, "Platform data not found\n");
1061                return -EINVAL;
1062        }
1063
1064        pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
1065        if (!pmic) {
1066                dev_err(&pdev->dev, "Memory allocation failed for pmic\n");
1067                return -ENOMEM;
1068        }
1069
1070        pmic->mfd = tps65910;
1071        platform_set_drvdata(pdev, pmic);
1072
1073        /* Give control of all register to control port */
1074        tps65910_reg_set_bits(pmic->mfd, TPS65910_DEVCTRL,
1075                                DEVCTRL_SR_CTL_I2C_SEL_MASK);
1076
1077        switch(tps65910_chip_id(tps65910)) {
1078        case TPS65910:
1079                pmic->get_ctrl_reg = &tps65910_get_ctrl_register;
1080                pmic->num_regulators = ARRAY_SIZE(tps65910_regs);
1081                pmic->ext_sleep_control = tps65910_ext_sleep_control;
1082                info = tps65910_regs;
1083                break;
1084        case TPS65911:
1085                pmic->get_ctrl_reg = &tps65911_get_ctrl_register;
1086                pmic->num_regulators = ARRAY_SIZE(tps65911_regs);
1087                pmic->ext_sleep_control = tps65911_ext_sleep_control;
1088                info = tps65911_regs;
1089                break;
1090        default:
1091                dev_err(&pdev->dev, "Invalid tps chip version\n");
1092                return -ENODEV;
1093        }
1094
1095        pmic->desc = devm_kzalloc(&pdev->dev, pmic->num_regulators *
1096                        sizeof(struct regulator_desc), GFP_KERNEL);
1097        if (!pmic->desc) {
1098                dev_err(&pdev->dev, "Memory alloc fails for desc\n");
1099                return -ENOMEM;
1100        }
1101
1102        pmic->info = devm_kzalloc(&pdev->dev, pmic->num_regulators *
1103                        sizeof(struct tps_info *), GFP_KERNEL);
1104        if (!pmic->info) {
1105                dev_err(&pdev->dev, "Memory alloc fails for info\n");
1106                return -ENOMEM;
1107        }
1108
1109        pmic->rdev = devm_kzalloc(&pdev->dev, pmic->num_regulators *
1110                        sizeof(struct regulator_dev *), GFP_KERNEL);
1111        if (!pmic->rdev) {
1112                dev_err(&pdev->dev, "Memory alloc fails for rdev\n");
1113                return -ENOMEM;
1114        }
1115
1116        for (i = 0; i < pmic->num_regulators && i < TPS65910_NUM_REGS;
1117                        i++, info++) {
1118
1119                reg_data = pmic_plat_data->tps65910_pmic_init_data[i];
1120
1121                /* Regulator API handles empty constraints but not NULL
1122                 * constraints */
1123                if (!reg_data)
1124                        continue;
1125
1126                /* Register the regulators */
1127                pmic->info[i] = info;
1128
1129                pmic->desc[i].name = info->name;
1130                pmic->desc[i].supply_name = info->vin_name;
1131                pmic->desc[i].id = i;
1132                pmic->desc[i].n_voltages = info->n_voltages;
1133                pmic->desc[i].enable_time = info->enable_time_us;
1134
1135                if (i == TPS65910_REG_VDD1 || i == TPS65910_REG_VDD2) {
1136                        pmic->desc[i].ops = &tps65910_ops_dcdc;
1137                        pmic->desc[i].n_voltages = VDD1_2_NUM_VOLT_FINE *
1138                                                        VDD1_2_NUM_VOLT_COARSE;
1139                        pmic->desc[i].ramp_delay = 12500;
1140                } else if (i == TPS65910_REG_VDD3) {
1141                        if (tps65910_chip_id(tps65910) == TPS65910) {
1142                                pmic->desc[i].ops = &tps65910_ops_vdd3;
1143                                pmic->desc[i].volt_table = info->voltage_table;
1144                        } else {
1145                                pmic->desc[i].ops = &tps65910_ops_dcdc;
1146                                pmic->desc[i].ramp_delay = 5000;
1147                        }
1148                } else {
1149                        if (tps65910_chip_id(tps65910) == TPS65910) {
1150                                pmic->desc[i].ops = &tps65910_ops;
1151                                pmic->desc[i].volt_table = info->voltage_table;
1152                        } else {
1153                                pmic->desc[i].ops = &tps65911_ops;
1154                        }
1155                }
1156
1157                err = tps65910_set_ext_sleep_config(pmic, i,
1158                                pmic_plat_data->regulator_ext_sleep_control[i]);
1159                /*
1160                 * Failing on regulator for configuring externally control
1161                 * is not a serious issue, just throw warning.
1162                 */
1163                if (err < 0)
1164                        dev_warn(tps65910->dev,
1165                                "Failed to initialise ext control config\n");
1166
1167                pmic->desc[i].type = REGULATOR_VOLTAGE;
1168                pmic->desc[i].owner = THIS_MODULE;
1169                pmic->desc[i].enable_reg = pmic->get_ctrl_reg(i);
1170                pmic->desc[i].enable_mask = TPS65910_SUPPLY_STATE_ENABLED;
1171
1172                config.dev = tps65910->dev;
1173                config.init_data = reg_data;
1174                config.driver_data = pmic;
1175                config.regmap = tps65910->regmap;
1176
1177                if (tps65910_reg_matches)
1178                        config.of_node = tps65910_reg_matches[i].of_node;
1179
1180                rdev = regulator_register(&pmic->desc[i], &config);
1181                if (IS_ERR(rdev)) {
1182                        dev_err(tps65910->dev,
1183                                "failed to register %s regulator\n",
1184                                pdev->name);
1185                        err = PTR_ERR(rdev);
1186                        goto err_unregister_regulator;
1187                }
1188
1189                /* Save regulator for cleanup */
1190                pmic->rdev[i] = rdev;
1191        }
1192        return 0;
1193
1194err_unregister_regulator:
1195        while (--i >= 0)
1196                regulator_unregister(pmic->rdev[i]);
1197        return err;
1198}
1199
1200static int tps65910_remove(struct platform_device *pdev)
1201{
1202        struct tps65910_reg *pmic = platform_get_drvdata(pdev);
1203        int i;
1204
1205        for (i = 0; i < pmic->num_regulators; i++)
1206                regulator_unregister(pmic->rdev[i]);
1207
1208        return 0;
1209}
1210
1211static void tps65910_shutdown(struct platform_device *pdev)
1212{
1213        struct tps65910_reg *pmic = platform_get_drvdata(pdev);
1214        int i;
1215
1216        /*
1217         * Before bootloader jumps to kernel, it makes sure that required
1218         * external control signals are in desired state so that given rails
1219         * can be configure accordingly.
1220         * If rails are configured to be controlled from external control
1221         * then before shutting down/rebooting the system, the external
1222         * control configuration need to be remove from the rails so that
1223         * its output will be available as per register programming even
1224         * if external controls are removed. This is require when the POR
1225         * value of the control signals are not in active state and before
1226         * bootloader initializes it, the system requires the rail output
1227         * to be active for booting.
1228         */
1229        for (i = 0; i < pmic->num_regulators; i++) {
1230                int err;
1231                if (!pmic->rdev[i])
1232                        continue;
1233
1234                err = tps65910_set_ext_sleep_config(pmic, i, 0);
1235                if (err < 0)
1236                        dev_err(&pdev->dev,
1237                                "Error in clearing external control\n");
1238        }
1239}
1240
1241static struct platform_driver tps65910_driver = {
1242        .driver = {
1243                .name = "tps65910-pmic",
1244                .owner = THIS_MODULE,
1245        },
1246        .probe = tps65910_probe,
1247        .remove = tps65910_remove,
1248        .shutdown = tps65910_shutdown,
1249};
1250
1251static int __init tps65910_init(void)
1252{
1253        return platform_driver_register(&tps65910_driver);
1254}
1255subsys_initcall(tps65910_init);
1256
1257static void __exit tps65910_cleanup(void)
1258{
1259        platform_driver_unregister(&tps65910_driver);
1260}
1261module_exit(tps65910_cleanup);
1262
1263MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
1264MODULE_DESCRIPTION("TPS65910/TPS65911 voltage regulator driver");
1265MODULE_LICENSE("GPL v2");
1266MODULE_ALIAS("platform:tps65910-pmic");
1267
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