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