linux/drivers/regulator/palmas-regulator.c
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   1/*
   2 * Driver for Regulator part of Palmas PMIC Chips
   3 *
   4 * Copyright 2011-2013 Texas Instruments Inc.
   5 *
   6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
   7 * Author: Ian Lartey <ian@slimlogic.co.uk>
   8 *
   9 *  This program is free software; you can redistribute it and/or modify it
  10 *  under  the terms of the GNU General  Public License as published by the
  11 *  Free Software Foundation;  either version 2 of the License, or (at your
  12 *  option) any later version.
  13 *
  14 */
  15
  16#include <linux/kernel.h>
  17#include <linux/module.h>
  18#include <linux/init.h>
  19#include <linux/err.h>
  20#include <linux/platform_device.h>
  21#include <linux/regulator/driver.h>
  22#include <linux/regulator/machine.h>
  23#include <linux/slab.h>
  24#include <linux/regmap.h>
  25#include <linux/mfd/palmas.h>
  26#include <linux/of.h>
  27#include <linux/of_platform.h>
  28#include <linux/regulator/of_regulator.h>
  29
  30struct regs_info {
  31        char    *name;
  32        char    *sname;
  33        u8      vsel_addr;
  34        u8      ctrl_addr;
  35        u8      tstep_addr;
  36};
  37
  38static const struct regs_info palmas_regs_info[] = {
  39        {
  40                .name           = "SMPS12",
  41                .sname          = "smps1-in",
  42                .vsel_addr      = PALMAS_SMPS12_VOLTAGE,
  43                .ctrl_addr      = PALMAS_SMPS12_CTRL,
  44                .tstep_addr     = PALMAS_SMPS12_TSTEP,
  45        },
  46        {
  47                .name           = "SMPS123",
  48                .sname          = "smps1-in",
  49                .vsel_addr      = PALMAS_SMPS12_VOLTAGE,
  50                .ctrl_addr      = PALMAS_SMPS12_CTRL,
  51                .tstep_addr     = PALMAS_SMPS12_TSTEP,
  52        },
  53        {
  54                .name           = "SMPS3",
  55                .sname          = "smps3-in",
  56                .vsel_addr      = PALMAS_SMPS3_VOLTAGE,
  57                .ctrl_addr      = PALMAS_SMPS3_CTRL,
  58        },
  59        {
  60                .name           = "SMPS45",
  61                .sname          = "smps4-in",
  62                .vsel_addr      = PALMAS_SMPS45_VOLTAGE,
  63                .ctrl_addr      = PALMAS_SMPS45_CTRL,
  64                .tstep_addr     = PALMAS_SMPS45_TSTEP,
  65        },
  66        {
  67                .name           = "SMPS457",
  68                .sname          = "smps4-in",
  69                .vsel_addr      = PALMAS_SMPS45_VOLTAGE,
  70                .ctrl_addr      = PALMAS_SMPS45_CTRL,
  71                .tstep_addr     = PALMAS_SMPS45_TSTEP,
  72        },
  73        {
  74                .name           = "SMPS6",
  75                .sname          = "smps6-in",
  76                .vsel_addr      = PALMAS_SMPS6_VOLTAGE,
  77                .ctrl_addr      = PALMAS_SMPS6_CTRL,
  78                .tstep_addr     = PALMAS_SMPS6_TSTEP,
  79        },
  80        {
  81                .name           = "SMPS7",
  82                .sname          = "smps7-in",
  83                .vsel_addr      = PALMAS_SMPS7_VOLTAGE,
  84                .ctrl_addr      = PALMAS_SMPS7_CTRL,
  85        },
  86        {
  87                .name           = "SMPS8",
  88                .sname          = "smps8-in",
  89                .vsel_addr      = PALMAS_SMPS8_VOLTAGE,
  90                .ctrl_addr      = PALMAS_SMPS8_CTRL,
  91                .tstep_addr     = PALMAS_SMPS8_TSTEP,
  92        },
  93        {
  94                .name           = "SMPS9",
  95                .sname          = "smps9-in",
  96                .vsel_addr      = PALMAS_SMPS9_VOLTAGE,
  97                .ctrl_addr      = PALMAS_SMPS9_CTRL,
  98        },
  99        {
 100                .name           = "SMPS10_OUT2",
 101                .sname          = "smps10-in",
 102                .ctrl_addr      = PALMAS_SMPS10_CTRL,
 103        },
 104        {
 105                .name           = "SMPS10_OUT1",
 106                .sname          = "smps10-out2",
 107                .ctrl_addr      = PALMAS_SMPS10_CTRL,
 108        },
 109        {
 110                .name           = "LDO1",
 111                .sname          = "ldo1-in",
 112                .vsel_addr      = PALMAS_LDO1_VOLTAGE,
 113                .ctrl_addr      = PALMAS_LDO1_CTRL,
 114        },
 115        {
 116                .name           = "LDO2",
 117                .sname          = "ldo2-in",
 118                .vsel_addr      = PALMAS_LDO2_VOLTAGE,
 119                .ctrl_addr      = PALMAS_LDO2_CTRL,
 120        },
 121        {
 122                .name           = "LDO3",
 123                .sname          = "ldo3-in",
 124                .vsel_addr      = PALMAS_LDO3_VOLTAGE,
 125                .ctrl_addr      = PALMAS_LDO3_CTRL,
 126        },
 127        {
 128                .name           = "LDO4",
 129                .sname          = "ldo4-in",
 130                .vsel_addr      = PALMAS_LDO4_VOLTAGE,
 131                .ctrl_addr      = PALMAS_LDO4_CTRL,
 132        },
 133        {
 134                .name           = "LDO5",
 135                .sname          = "ldo5-in",
 136                .vsel_addr      = PALMAS_LDO5_VOLTAGE,
 137                .ctrl_addr      = PALMAS_LDO5_CTRL,
 138        },
 139        {
 140                .name           = "LDO6",
 141                .sname          = "ldo6-in",
 142                .vsel_addr      = PALMAS_LDO6_VOLTAGE,
 143                .ctrl_addr      = PALMAS_LDO6_CTRL,
 144        },
 145        {
 146                .name           = "LDO7",
 147                .sname          = "ldo7-in",
 148                .vsel_addr      = PALMAS_LDO7_VOLTAGE,
 149                .ctrl_addr      = PALMAS_LDO7_CTRL,
 150        },
 151        {
 152                .name           = "LDO8",
 153                .sname          = "ldo8-in",
 154                .vsel_addr      = PALMAS_LDO8_VOLTAGE,
 155                .ctrl_addr      = PALMAS_LDO8_CTRL,
 156        },
 157        {
 158                .name           = "LDO9",
 159                .sname          = "ldo9-in",
 160                .vsel_addr      = PALMAS_LDO9_VOLTAGE,
 161                .ctrl_addr      = PALMAS_LDO9_CTRL,
 162        },
 163        {
 164                .name           = "LDOLN",
 165                .sname          = "ldoln-in",
 166                .vsel_addr      = PALMAS_LDOLN_VOLTAGE,
 167                .ctrl_addr      = PALMAS_LDOLN_CTRL,
 168        },
 169        {
 170                .name           = "LDOUSB",
 171                .sname          = "ldousb-in",
 172                .vsel_addr      = PALMAS_LDOUSB_VOLTAGE,
 173                .ctrl_addr      = PALMAS_LDOUSB_CTRL,
 174        },
 175        {
 176                .name           = "REGEN1",
 177                .ctrl_addr      = PALMAS_REGEN1_CTRL,
 178        },
 179        {
 180                .name           = "REGEN2",
 181                .ctrl_addr      = PALMAS_REGEN2_CTRL,
 182        },
 183        {
 184                .name           = "REGEN3",
 185                .ctrl_addr      = PALMAS_REGEN3_CTRL,
 186        },
 187        {
 188                .name           = "SYSEN1",
 189                .ctrl_addr      = PALMAS_SYSEN1_CTRL,
 190        },
 191        {
 192                .name           = "SYSEN2",
 193                .ctrl_addr      = PALMAS_SYSEN2_CTRL,
 194        },
 195};
 196
 197static unsigned int palmas_smps_ramp_delay[4] = {0, 10000, 5000, 2500};
 198
 199#define SMPS_CTRL_MODE_OFF              0x00
 200#define SMPS_CTRL_MODE_ON               0x01
 201#define SMPS_CTRL_MODE_ECO              0x02
 202#define SMPS_CTRL_MODE_PWM              0x03
 203
 204#define PALMAS_SMPS_NUM_VOLTAGES        122
 205#define PALMAS_SMPS10_NUM_VOLTAGES      2
 206#define PALMAS_LDO_NUM_VOLTAGES         50
 207
 208#define SMPS10_VSEL                     (1<<3)
 209#define SMPS10_BOOST_EN                 (1<<2)
 210#define SMPS10_BYPASS_EN                (1<<1)
 211#define SMPS10_SWITCH_EN                (1<<0)
 212
 213#define REGULATOR_SLAVE                 0
 214
 215static int palmas_smps_read(struct palmas *palmas, unsigned int reg,
 216                unsigned int *dest)
 217{
 218        unsigned int addr;
 219
 220        addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
 221
 222        return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
 223}
 224
 225static int palmas_smps_write(struct palmas *palmas, unsigned int reg,
 226                unsigned int value)
 227{
 228        unsigned int addr;
 229
 230        addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
 231
 232        return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
 233}
 234
 235static int palmas_ldo_read(struct palmas *palmas, unsigned int reg,
 236                unsigned int *dest)
 237{
 238        unsigned int addr;
 239
 240        addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
 241
 242        return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
 243}
 244
 245static int palmas_ldo_write(struct palmas *palmas, unsigned int reg,
 246                unsigned int value)
 247{
 248        unsigned int addr;
 249
 250        addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
 251
 252        return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
 253}
 254
 255static int palmas_is_enabled_smps(struct regulator_dev *dev)
 256{
 257        struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 258        int id = rdev_get_id(dev);
 259        unsigned int reg;
 260
 261        palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 262
 263        reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
 264        reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
 265
 266        return !!(reg);
 267}
 268
 269static int palmas_enable_smps(struct regulator_dev *dev)
 270{
 271        struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 272        int id = rdev_get_id(dev);
 273        unsigned int reg;
 274
 275        palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 276
 277        reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 278        if (pmic->current_reg_mode[id])
 279                reg |= pmic->current_reg_mode[id];
 280        else
 281                reg |= SMPS_CTRL_MODE_ON;
 282
 283        palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
 284
 285        return 0;
 286}
 287
 288static int palmas_disable_smps(struct regulator_dev *dev)
 289{
 290        struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 291        int id = rdev_get_id(dev);
 292        unsigned int reg;
 293
 294        palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 295
 296        reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 297
 298        palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
 299
 300        return 0;
 301}
 302
 303static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode)
 304{
 305        struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 306        int id = rdev_get_id(dev);
 307        unsigned int reg;
 308        bool rail_enable = true;
 309
 310        palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 311        reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 312
 313        if (reg == SMPS_CTRL_MODE_OFF)
 314                rail_enable = false;
 315
 316        switch (mode) {
 317        case REGULATOR_MODE_NORMAL:
 318                reg |= SMPS_CTRL_MODE_ON;
 319                break;
 320        case REGULATOR_MODE_IDLE:
 321                reg |= SMPS_CTRL_MODE_ECO;
 322                break;
 323        case REGULATOR_MODE_FAST:
 324                reg |= SMPS_CTRL_MODE_PWM;
 325                break;
 326        default:
 327                return -EINVAL;
 328        }
 329
 330        pmic->current_reg_mode[id] = reg & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 331        if (rail_enable)
 332                palmas_smps_write(pmic->palmas,
 333                        palmas_regs_info[id].ctrl_addr, reg);
 334        return 0;
 335}
 336
 337static unsigned int palmas_get_mode_smps(struct regulator_dev *dev)
 338{
 339        struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 340        int id = rdev_get_id(dev);
 341        unsigned int reg;
 342
 343        reg = pmic->current_reg_mode[id] & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 344
 345        switch (reg) {
 346        case SMPS_CTRL_MODE_ON:
 347                return REGULATOR_MODE_NORMAL;
 348        case SMPS_CTRL_MODE_ECO:
 349                return REGULATOR_MODE_IDLE;
 350        case SMPS_CTRL_MODE_PWM:
 351                return REGULATOR_MODE_FAST;
 352        }
 353
 354        return 0;
 355}
 356
 357static int palmas_list_voltage_smps(struct regulator_dev *dev,
 358                                        unsigned selector)
 359{
 360        struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 361        int id = rdev_get_id(dev);
 362        int mult = 1;
 363
 364        /* Read the multiplier set in VSEL register to return
 365         * the correct voltage.
 366         */
 367        if (pmic->range[id])
 368                mult = 2;
 369
 370        if (selector == 0)
 371                return 0;
 372        else if (selector < 6)
 373                return 500000 * mult;
 374        else
 375                /* Voltage is linear mapping starting from selector 6,
 376                 * volt = (0.49V + ((selector - 5) * 0.01V)) * RANGE
 377                 * RANGE is either x1 or x2
 378                 */
 379                return (490000 + ((selector - 5) * 10000)) * mult;
 380}
 381
 382static int palmas_map_voltage_smps(struct regulator_dev *rdev,
 383                int min_uV, int max_uV)
 384{
 385        struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
 386        int id = rdev_get_id(rdev);
 387        int ret, voltage;
 388
 389        if (min_uV == 0)
 390                return 0;
 391
 392        if (pmic->range[id]) { /* RANGE is x2 */
 393                if (min_uV < 1000000)
 394                        min_uV = 1000000;
 395                ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 6;
 396        } else {                /* RANGE is x1 */
 397                if (min_uV < 500000)
 398                        min_uV = 500000;
 399                ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 6;
 400        }
 401
 402        /* Map back into a voltage to verify we're still in bounds */
 403        voltage = palmas_list_voltage_smps(rdev, ret);
 404        if (voltage < min_uV || voltage > max_uV)
 405                return -EINVAL;
 406
 407        return ret;
 408}
 409
 410static int palma_smps_set_voltage_smps_time_sel(struct regulator_dev *rdev,
 411        unsigned int old_selector, unsigned int new_selector)
 412{
 413        struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
 414        int id = rdev_get_id(rdev);
 415        int old_uv, new_uv;
 416        unsigned int ramp_delay = pmic->ramp_delay[id];
 417
 418        if (!ramp_delay)
 419                return 0;
 420
 421        old_uv = palmas_list_voltage_smps(rdev, old_selector);
 422        if (old_uv < 0)
 423                return old_uv;
 424
 425        new_uv = palmas_list_voltage_smps(rdev, new_selector);
 426        if (new_uv < 0)
 427                return new_uv;
 428
 429        return DIV_ROUND_UP(abs(old_uv - new_uv), ramp_delay);
 430}
 431
 432static int palmas_smps_set_ramp_delay(struct regulator_dev *rdev,
 433                 int ramp_delay)
 434{
 435        struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
 436        int id = rdev_get_id(rdev);
 437        unsigned int reg = 0;
 438        unsigned int addr = palmas_regs_info[id].tstep_addr;
 439        int ret;
 440
 441        /* SMPS3 and SMPS7 do not have tstep_addr setting */
 442        switch (id) {
 443        case PALMAS_REG_SMPS3:
 444        case PALMAS_REG_SMPS7:
 445                return 0;
 446        }
 447
 448        if (ramp_delay <= 0)
 449                reg = 0;
 450        else if (ramp_delay <= 2500)
 451                reg = 3;
 452        else if (ramp_delay <= 5000)
 453                reg = 2;
 454        else
 455                reg = 1;
 456
 457        ret = palmas_smps_write(pmic->palmas, addr, reg);
 458        if (ret < 0) {
 459                dev_err(pmic->palmas->dev, "TSTEP write failed: %d\n", ret);
 460                return ret;
 461        }
 462
 463        pmic->ramp_delay[id] = palmas_smps_ramp_delay[reg];
 464        return ret;
 465}
 466
 467static struct regulator_ops palmas_ops_smps = {
 468        .is_enabled             = palmas_is_enabled_smps,
 469        .enable                 = palmas_enable_smps,
 470        .disable                = palmas_disable_smps,
 471        .set_mode               = palmas_set_mode_smps,
 472        .get_mode               = palmas_get_mode_smps,
 473        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 474        .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 475        .list_voltage           = palmas_list_voltage_smps,
 476        .map_voltage            = palmas_map_voltage_smps,
 477        .set_voltage_time_sel   = palma_smps_set_voltage_smps_time_sel,
 478        .set_ramp_delay         = palmas_smps_set_ramp_delay,
 479};
 480
 481static struct regulator_ops palmas_ops_smps10 = {
 482        .is_enabled             = regulator_is_enabled_regmap,
 483        .enable                 = regulator_enable_regmap,
 484        .disable                = regulator_disable_regmap,
 485        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 486        .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 487        .list_voltage           = regulator_list_voltage_linear,
 488        .map_voltage            = regulator_map_voltage_linear,
 489        .set_bypass             = regulator_set_bypass_regmap,
 490        .get_bypass             = regulator_get_bypass_regmap,
 491};
 492
 493static int palmas_is_enabled_ldo(struct regulator_dev *dev)
 494{
 495        struct palmas_pmic *pmic = rdev_get_drvdata(dev);
 496        int id = rdev_get_id(dev);
 497        unsigned int reg;
 498
 499        palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 500
 501        reg &= PALMAS_LDO1_CTRL_STATUS;
 502
 503        return !!(reg);
 504}
 505
 506static struct regulator_ops palmas_ops_ldo = {
 507        .is_enabled             = palmas_is_enabled_ldo,
 508        .enable                 = regulator_enable_regmap,
 509        .disable                = regulator_disable_regmap,
 510        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 511        .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 512        .list_voltage           = regulator_list_voltage_linear,
 513        .map_voltage            = regulator_map_voltage_linear,
 514};
 515
 516static struct regulator_ops palmas_ops_extreg = {
 517        .is_enabled             = regulator_is_enabled_regmap,
 518        .enable                 = regulator_enable_regmap,
 519        .disable                = regulator_disable_regmap,
 520};
 521
 522/*
 523 * setup the hardware based sleep configuration of the SMPS/LDO regulators
 524 * from the platform data. This is different to the software based control
 525 * supported by the regulator framework as it is controlled by toggling
 526 * pins on the PMIC such as PREQ, SYSEN, ...
 527 */
 528static int palmas_smps_init(struct palmas *palmas, int id,
 529                struct palmas_reg_init *reg_init)
 530{
 531        unsigned int reg;
 532        unsigned int addr;
 533        int ret;
 534
 535        addr = palmas_regs_info[id].ctrl_addr;
 536
 537        ret = palmas_smps_read(palmas, addr, &reg);
 538        if (ret)
 539                return ret;
 540
 541        switch (id) {
 542        case PALMAS_REG_SMPS10_OUT1:
 543        case PALMAS_REG_SMPS10_OUT2:
 544                reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK;
 545                if (reg_init->mode_sleep)
 546                        reg |= reg_init->mode_sleep <<
 547                                        PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT;
 548                break;
 549        default:
 550                if (reg_init->warm_reset)
 551                        reg |= PALMAS_SMPS12_CTRL_WR_S;
 552                else
 553                        reg &= ~PALMAS_SMPS12_CTRL_WR_S;
 554
 555                if (reg_init->roof_floor)
 556                        reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
 557                else
 558                        reg &= ~PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
 559
 560                reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK;
 561                if (reg_init->mode_sleep)
 562                        reg |= reg_init->mode_sleep <<
 563                                        PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT;
 564        }
 565
 566        ret = palmas_smps_write(palmas, addr, reg);
 567        if (ret)
 568                return ret;
 569
 570        if (palmas_regs_info[id].vsel_addr && reg_init->vsel) {
 571                addr = palmas_regs_info[id].vsel_addr;
 572
 573                reg = reg_init->vsel;
 574
 575                ret = palmas_smps_write(palmas, addr, reg);
 576                if (ret)
 577                        return ret;
 578        }
 579
 580
 581        return 0;
 582}
 583
 584static int palmas_ldo_init(struct palmas *palmas, int id,
 585                struct palmas_reg_init *reg_init)
 586{
 587        unsigned int reg;
 588        unsigned int addr;
 589        int ret;
 590
 591        addr = palmas_regs_info[id].ctrl_addr;
 592
 593        ret = palmas_ldo_read(palmas, addr, &reg);
 594        if (ret)
 595                return ret;
 596
 597        if (reg_init->warm_reset)
 598                reg |= PALMAS_LDO1_CTRL_WR_S;
 599        else
 600                reg &= ~PALMAS_LDO1_CTRL_WR_S;
 601
 602        if (reg_init->mode_sleep)
 603                reg |= PALMAS_LDO1_CTRL_MODE_SLEEP;
 604        else
 605                reg &= ~PALMAS_LDO1_CTRL_MODE_SLEEP;
 606
 607        ret = palmas_ldo_write(palmas, addr, reg);
 608        if (ret)
 609                return ret;
 610
 611        return 0;
 612}
 613
 614static int palmas_extreg_init(struct palmas *palmas, int id,
 615                struct palmas_reg_init *reg_init)
 616{
 617        unsigned int addr;
 618        int ret;
 619        unsigned int val = 0;
 620
 621        addr = palmas_regs_info[id].ctrl_addr;
 622
 623        if (reg_init->mode_sleep)
 624                val = PALMAS_REGEN1_CTRL_MODE_SLEEP;
 625
 626        ret = palmas_update_bits(palmas, PALMAS_RESOURCE_BASE,
 627                        addr, PALMAS_REGEN1_CTRL_MODE_SLEEP, val);
 628        if (ret < 0) {
 629                dev_err(palmas->dev, "Resource reg 0x%02x update failed %d\n",
 630                        addr, ret);
 631                return ret;
 632        }
 633        return 0;
 634}
 635
 636static void palmas_enable_ldo8_track(struct palmas *palmas)
 637{
 638        unsigned int reg;
 639        unsigned int addr;
 640        int ret;
 641
 642        addr = palmas_regs_info[PALMAS_REG_LDO8].ctrl_addr;
 643
 644        ret = palmas_ldo_read(palmas, addr, &reg);
 645        if (ret) {
 646                dev_err(palmas->dev, "Error in reading ldo8 control reg\n");
 647                return;
 648        }
 649
 650        reg |= PALMAS_LDO8_CTRL_LDO_TRACKING_EN;
 651        ret = palmas_ldo_write(palmas, addr, reg);
 652        if (ret < 0) {
 653                dev_err(palmas->dev, "Error in enabling tracking mode\n");
 654                return;
 655        }
 656        /*
 657         * When SMPS45 is set to off and LDO8 tracking is enabled, the LDO8
 658         * output is defined by the LDO8_VOLTAGE.VSEL register divided by two,
 659         * and can be set from 0.45 to 1.65 V.
 660         */
 661        addr = palmas_regs_info[PALMAS_REG_LDO8].vsel_addr;
 662        ret = palmas_ldo_read(palmas, addr, &reg);
 663        if (ret) {
 664                dev_err(palmas->dev, "Error in reading ldo8 voltage reg\n");
 665                return;
 666        }
 667
 668        reg = (reg << 1) & PALMAS_LDO8_VOLTAGE_VSEL_MASK;
 669        ret = palmas_ldo_write(palmas, addr, reg);
 670        if (ret < 0)
 671                dev_err(palmas->dev, "Error in setting ldo8 voltage reg\n");
 672
 673        return;
 674}
 675
 676static struct of_regulator_match palmas_matches[] = {
 677        { .name = "smps12", },
 678        { .name = "smps123", },
 679        { .name = "smps3", },
 680        { .name = "smps45", },
 681        { .name = "smps457", },
 682        { .name = "smps6", },
 683        { .name = "smps7", },
 684        { .name = "smps8", },
 685        { .name = "smps9", },
 686        { .name = "smps10_out2", },
 687        { .name = "smps10_out1", },
 688        { .name = "ldo1", },
 689        { .name = "ldo2", },
 690        { .name = "ldo3", },
 691        { .name = "ldo4", },
 692        { .name = "ldo5", },
 693        { .name = "ldo6", },
 694        { .name = "ldo7", },
 695        { .name = "ldo8", },
 696        { .name = "ldo9", },
 697        { .name = "ldoln", },
 698        { .name = "ldousb", },
 699        { .name = "regen1", },
 700        { .name = "regen2", },
 701        { .name = "regen3", },
 702        { .name = "sysen1", },
 703        { .name = "sysen2", },
 704};
 705
 706static void palmas_dt_to_pdata(struct device *dev,
 707                struct device_node *node,
 708                struct palmas_pmic_platform_data *pdata)
 709{
 710        struct device_node *regulators;
 711        u32 prop;
 712        int idx, ret;
 713
 714        node = of_node_get(node);
 715        regulators = of_find_node_by_name(node, "regulators");
 716        if (!regulators) {
 717                dev_info(dev, "regulator node not found\n");
 718                return;
 719        }
 720
 721        ret = of_regulator_match(dev, regulators, palmas_matches,
 722                        PALMAS_NUM_REGS);
 723        of_node_put(regulators);
 724        if (ret < 0) {
 725                dev_err(dev, "Error parsing regulator init data: %d\n", ret);
 726                return;
 727        }
 728
 729        for (idx = 0; idx < PALMAS_NUM_REGS; idx++) {
 730                if (!palmas_matches[idx].init_data ||
 731                                !palmas_matches[idx].of_node)
 732                        continue;
 733
 734                pdata->reg_data[idx] = palmas_matches[idx].init_data;
 735
 736                pdata->reg_init[idx] = devm_kzalloc(dev,
 737                                sizeof(struct palmas_reg_init), GFP_KERNEL);
 738
 739                pdata->reg_init[idx]->warm_reset =
 740                        of_property_read_bool(palmas_matches[idx].of_node,
 741                                             "ti,warm-reset");
 742
 743                pdata->reg_init[idx]->roof_floor =
 744                        of_property_read_bool(palmas_matches[idx].of_node,
 745                                              "ti,roof-floor");
 746
 747                ret = of_property_read_u32(palmas_matches[idx].of_node,
 748                                "ti,mode-sleep", &prop);
 749                if (!ret)
 750                        pdata->reg_init[idx]->mode_sleep = prop;
 751
 752                ret = of_property_read_bool(palmas_matches[idx].of_node,
 753                                            "ti,smps-range");
 754                if (ret)
 755                        pdata->reg_init[idx]->vsel =
 756                                PALMAS_SMPS12_VOLTAGE_RANGE;
 757
 758                if (idx == PALMAS_REG_LDO8)
 759                        pdata->enable_ldo8_tracking = of_property_read_bool(
 760                                                palmas_matches[idx].of_node,
 761                                                "ti,enable-ldo8-tracking");
 762        }
 763
 764        pdata->ldo6_vibrator = of_property_read_bool(node, "ti,ldo6-vibrator");
 765}
 766
 767
 768static int palmas_regulators_probe(struct platform_device *pdev)
 769{
 770        struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
 771        struct palmas_pmic_platform_data *pdata = dev_get_platdata(&pdev->dev);
 772        struct device_node *node = pdev->dev.of_node;
 773        struct regulator_dev *rdev;
 774        struct regulator_config config = { };
 775        struct palmas_pmic *pmic;
 776        struct palmas_reg_init *reg_init;
 777        int id = 0, ret;
 778        unsigned int addr, reg;
 779
 780        if (node && !pdata) {
 781                pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 782
 783                if (!pdata)
 784                        return -ENOMEM;
 785
 786                palmas_dt_to_pdata(&pdev->dev, node, pdata);
 787        }
 788
 789        pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
 790        if (!pmic)
 791                return -ENOMEM;
 792
 793        pmic->dev = &pdev->dev;
 794        pmic->palmas = palmas;
 795        palmas->pmic = pmic;
 796        platform_set_drvdata(pdev, pmic);
 797
 798        ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, &reg);
 799        if (ret)
 800                return ret;
 801
 802        if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN)
 803                pmic->smps123 = 1;
 804
 805        if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN)
 806                pmic->smps457 = 1;
 807
 808        config.regmap = palmas->regmap[REGULATOR_SLAVE];
 809        config.dev = &pdev->dev;
 810        config.driver_data = pmic;
 811
 812        for (id = 0; id < PALMAS_REG_LDO1; id++) {
 813                bool ramp_delay_support = false;
 814
 815                /*
 816                 * Miss out regulators which are not available due
 817                 * to slaving configurations.
 818                 */
 819                switch (id) {
 820                case PALMAS_REG_SMPS12:
 821                case PALMAS_REG_SMPS3:
 822                        if (pmic->smps123)
 823                                continue;
 824                        if (id == PALMAS_REG_SMPS12)
 825                                ramp_delay_support = true;
 826                        break;
 827                case PALMAS_REG_SMPS123:
 828                        if (!pmic->smps123)
 829                                continue;
 830                        ramp_delay_support = true;
 831                        break;
 832                case PALMAS_REG_SMPS45:
 833                case PALMAS_REG_SMPS7:
 834                        if (pmic->smps457)
 835                                continue;
 836                        if (id == PALMAS_REG_SMPS45)
 837                                ramp_delay_support = true;
 838                        break;
 839                case PALMAS_REG_SMPS457:
 840                        if (!pmic->smps457)
 841                                continue;
 842                        ramp_delay_support = true;
 843                        break;
 844                case PALMAS_REG_SMPS10_OUT1:
 845                case PALMAS_REG_SMPS10_OUT2:
 846                        if (!PALMAS_PMIC_HAS(palmas, SMPS10_BOOST))
 847                                continue;
 848                }
 849
 850                if ((id == PALMAS_REG_SMPS6) || (id == PALMAS_REG_SMPS8))
 851                        ramp_delay_support = true;
 852
 853                if (ramp_delay_support) {
 854                        addr = palmas_regs_info[id].tstep_addr;
 855                        ret = palmas_smps_read(pmic->palmas, addr, &reg);
 856                        if (ret < 0) {
 857                                dev_err(&pdev->dev,
 858                                        "reading TSTEP reg failed: %d\n", ret);
 859                                goto err_unregister_regulator;
 860                        }
 861                        pmic->desc[id].ramp_delay =
 862                                        palmas_smps_ramp_delay[reg & 0x3];
 863                        pmic->ramp_delay[id] = pmic->desc[id].ramp_delay;
 864                }
 865
 866                /* Initialise sleep/init values from platform data */
 867                if (pdata && pdata->reg_init[id]) {
 868                        reg_init = pdata->reg_init[id];
 869                        ret = palmas_smps_init(palmas, id, reg_init);
 870                        if (ret)
 871                                goto err_unregister_regulator;
 872                }
 873
 874                /* Register the regulators */
 875                pmic->desc[id].name = palmas_regs_info[id].name;
 876                pmic->desc[id].id = id;
 877
 878                switch (id) {
 879                case PALMAS_REG_SMPS10_OUT1:
 880                case PALMAS_REG_SMPS10_OUT2:
 881                        pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES;
 882                        pmic->desc[id].ops = &palmas_ops_smps10;
 883                        pmic->desc[id].vsel_reg =
 884                                        PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 885                                                        PALMAS_SMPS10_CTRL);
 886                        pmic->desc[id].vsel_mask = SMPS10_VSEL;
 887                        pmic->desc[id].enable_reg =
 888                                        PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 889                                                        PALMAS_SMPS10_CTRL);
 890                        if (id == PALMAS_REG_SMPS10_OUT1)
 891                                pmic->desc[id].enable_mask = SMPS10_SWITCH_EN;
 892                        else
 893                                pmic->desc[id].enable_mask = SMPS10_BOOST_EN;
 894                        pmic->desc[id].bypass_reg =
 895                                        PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 896                                                        PALMAS_SMPS10_CTRL);
 897                        pmic->desc[id].bypass_mask = SMPS10_BYPASS_EN;
 898                        pmic->desc[id].min_uV = 3750000;
 899                        pmic->desc[id].uV_step = 1250000;
 900                        break;
 901                default:
 902                        /*
 903                         * Read and store the RANGE bit for later use
 904                         * This must be done before regulator is probed,
 905                         * otherwise we error in probe with unsupportable
 906                         * ranges. Read the current smps mode for later use.
 907                         */
 908                        addr = palmas_regs_info[id].vsel_addr;
 909
 910                        ret = palmas_smps_read(pmic->palmas, addr, &reg);
 911                        if (ret)
 912                                goto err_unregister_regulator;
 913                        if (reg & PALMAS_SMPS12_VOLTAGE_RANGE)
 914                                pmic->range[id] = 1;
 915
 916                        pmic->desc[id].ops = &palmas_ops_smps;
 917                        pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES;
 918                        pmic->desc[id].vsel_reg =
 919                                        PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 920                                                palmas_regs_info[id].vsel_addr);
 921                        pmic->desc[id].vsel_mask =
 922                                        PALMAS_SMPS12_VOLTAGE_VSEL_MASK;
 923
 924                        /* Read the smps mode for later use. */
 925                        addr = palmas_regs_info[id].ctrl_addr;
 926                        ret = palmas_smps_read(pmic->palmas, addr, &reg);
 927                        if (ret)
 928                                goto err_unregister_regulator;
 929                        pmic->current_reg_mode[id] = reg &
 930                                        PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 931                }
 932
 933                pmic->desc[id].type = REGULATOR_VOLTAGE;
 934                pmic->desc[id].owner = THIS_MODULE;
 935
 936                if (pdata)
 937                        config.init_data = pdata->reg_data[id];
 938                else
 939                        config.init_data = NULL;
 940
 941                pmic->desc[id].supply_name = palmas_regs_info[id].sname;
 942                config.of_node = palmas_matches[id].of_node;
 943
 944                rdev = regulator_register(&pmic->desc[id], &config);
 945                if (IS_ERR(rdev)) {
 946                        dev_err(&pdev->dev,
 947                                "failed to register %s regulator\n",
 948                                pdev->name);
 949                        ret = PTR_ERR(rdev);
 950                        goto err_unregister_regulator;
 951                }
 952
 953                /* Save regulator for cleanup */
 954                pmic->rdev[id] = rdev;
 955        }
 956
 957        /* Start this loop from the id left from previous loop */
 958        for (; id < PALMAS_NUM_REGS; id++) {
 959
 960                /* Miss out regulators which are not available due
 961                 * to alternate functions.
 962                 */
 963
 964                /* Register the regulators */
 965                pmic->desc[id].name = palmas_regs_info[id].name;
 966                pmic->desc[id].id = id;
 967                pmic->desc[id].type = REGULATOR_VOLTAGE;
 968                pmic->desc[id].owner = THIS_MODULE;
 969
 970                if (id < PALMAS_REG_REGEN1) {
 971                        pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;
 972                        pmic->desc[id].ops = &palmas_ops_ldo;
 973                        pmic->desc[id].min_uV = 900000;
 974                        pmic->desc[id].uV_step = 50000;
 975                        pmic->desc[id].linear_min_sel = 1;
 976                        pmic->desc[id].enable_time = 500;
 977                        pmic->desc[id].vsel_reg =
 978                                        PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
 979                                                palmas_regs_info[id].vsel_addr);
 980                        pmic->desc[id].vsel_mask =
 981                                        PALMAS_LDO1_VOLTAGE_VSEL_MASK;
 982                        pmic->desc[id].enable_reg =
 983                                        PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
 984                                                palmas_regs_info[id].ctrl_addr);
 985                        pmic->desc[id].enable_mask =
 986                                        PALMAS_LDO1_CTRL_MODE_ACTIVE;
 987
 988                        /* Check if LDO8 is in tracking mode or not */
 989                        if (pdata && (id == PALMAS_REG_LDO8) &&
 990                                        pdata->enable_ldo8_tracking) {
 991                                palmas_enable_ldo8_track(palmas);
 992                                pmic->desc[id].min_uV = 450000;
 993                                pmic->desc[id].uV_step = 25000;
 994                        }
 995
 996                        /* LOD6 in vibrator mode will have enable time 2000us */
 997                        if (pdata && pdata->ldo6_vibrator &&
 998                                (id == PALMAS_REG_LDO6))
 999                                pmic->desc[id].enable_time = 2000;
1000                } else {
1001                        pmic->desc[id].n_voltages = 1;
1002                        pmic->desc[id].ops = &palmas_ops_extreg;
1003                        pmic->desc[id].enable_reg =
1004                                        PALMAS_BASE_TO_REG(PALMAS_RESOURCE_BASE,
1005                                                palmas_regs_info[id].ctrl_addr);
1006                        pmic->desc[id].enable_mask =
1007                                        PALMAS_REGEN1_CTRL_MODE_ACTIVE;
1008                }
1009
1010                if (pdata)
1011                        config.init_data = pdata->reg_data[id];
1012                else
1013                        config.init_data = NULL;
1014
1015                pmic->desc[id].supply_name = palmas_regs_info[id].sname;
1016                config.of_node = palmas_matches[id].of_node;
1017
1018                rdev = regulator_register(&pmic->desc[id], &config);
1019                if (IS_ERR(rdev)) {
1020                        dev_err(&pdev->dev,
1021                                "failed to register %s regulator\n",
1022                                pdev->name);
1023                        ret = PTR_ERR(rdev);
1024                        goto err_unregister_regulator;
1025                }
1026
1027                /* Save regulator for cleanup */
1028                pmic->rdev[id] = rdev;
1029
1030                /* Initialise sleep/init values from platform data */
1031                if (pdata) {
1032                        reg_init = pdata->reg_init[id];
1033                        if (reg_init) {
1034                                if (id < PALMAS_REG_REGEN1)
1035                                        ret = palmas_ldo_init(palmas,
1036                                                        id, reg_init);
1037                                else
1038                                        ret = palmas_extreg_init(palmas,
1039                                                        id, reg_init);
1040                                if (ret) {
1041                                        regulator_unregister(pmic->rdev[id]);
1042                                        goto err_unregister_regulator;
1043                                }
1044                        }
1045                }
1046        }
1047
1048
1049        return 0;
1050
1051err_unregister_regulator:
1052        while (--id >= 0)
1053                regulator_unregister(pmic->rdev[id]);
1054        return ret;
1055}
1056
1057static int palmas_regulators_remove(struct platform_device *pdev)
1058{
1059        struct palmas_pmic *pmic = platform_get_drvdata(pdev);
1060        int id;
1061
1062        for (id = 0; id < PALMAS_NUM_REGS; id++)
1063                regulator_unregister(pmic->rdev[id]);
1064        return 0;
1065}
1066
1067static struct of_device_id of_palmas_match_tbl[] = {
1068        { .compatible = "ti,palmas-pmic", },
1069        { .compatible = "ti,twl6035-pmic", },
1070        { .compatible = "ti,twl6036-pmic", },
1071        { .compatible = "ti,twl6037-pmic", },
1072        { .compatible = "ti,tps65913-pmic", },
1073        { .compatible = "ti,tps65914-pmic", },
1074        { .compatible = "ti,tps80036-pmic", },
1075        { .compatible = "ti,tps659038-pmic", },
1076        { /* end */ }
1077};
1078
1079static struct platform_driver palmas_driver = {
1080        .driver = {
1081                .name = "palmas-pmic",
1082                .of_match_table = of_palmas_match_tbl,
1083                .owner = THIS_MODULE,
1084        },
1085        .probe = palmas_regulators_probe,
1086        .remove = palmas_regulators_remove,
1087};
1088
1089static int __init palmas_init(void)
1090{
1091        return platform_driver_register(&palmas_driver);
1092}
1093subsys_initcall(palmas_init);
1094
1095static void __exit palmas_exit(void)
1096{
1097        platform_driver_unregister(&palmas_driver);
1098}
1099module_exit(palmas_exit);
1100
1101MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
1102MODULE_DESCRIPTION("Palmas voltage regulator driver");
1103MODULE_LICENSE("GPL");
1104MODULE_ALIAS("platform:palmas-pmic");
1105MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);
1106
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