linux/drivers/regulator/s2mps11.c
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   1/*
   2 * s2mps11.c
   3 *
   4 * Copyright (c) 2012 Samsung Electronics Co., Ltd
   5 *              http://www.samsung.com
   6 *
   7 *  This program is free software; you can redistribute  it and/or modify it
   8 *  under  the terms of  the GNU General  Public License as published by the
   9 *  Free Software Foundation;  either version 2 of the  License, or (at your
  10 *  option) any later version.
  11 *
  12 */
  13
  14#include <linux/bug.h>
  15#include <linux/err.h>
  16#include <linux/gpio.h>
  17#include <linux/slab.h>
  18#include <linux/module.h>
  19#include <linux/platform_device.h>
  20#include <linux/regulator/driver.h>
  21#include <linux/regulator/machine.h>
  22#include <linux/mfd/samsung/core.h>
  23#include <linux/mfd/samsung/s2mps11.h>
  24
  25struct s2mps11_info {
  26        struct regulator_dev *rdev[S2MPS11_REGULATOR_MAX];
  27
  28        int ramp_delay2;
  29        int ramp_delay34;
  30        int ramp_delay5;
  31        int ramp_delay16;
  32        int ramp_delay7810;
  33        int ramp_delay9;
  34
  35        bool buck6_ramp;
  36        bool buck2_ramp;
  37        bool buck3_ramp;
  38        bool buck4_ramp;
  39};
  40
  41static int get_ramp_delay(int ramp_delay)
  42{
  43        unsigned char cnt = 0;
  44
  45        ramp_delay /= 6250;
  46
  47        while (true) {
  48                ramp_delay = ramp_delay >> 1;
  49                if (ramp_delay == 0)
  50                        break;
  51                cnt++;
  52        }
  53        return cnt;
  54}
  55
  56static struct regulator_ops s2mps11_ldo_ops = {
  57        .list_voltage           = regulator_list_voltage_linear,
  58        .map_voltage            = regulator_map_voltage_linear,
  59        .is_enabled             = regulator_is_enabled_regmap,
  60        .enable                 = regulator_enable_regmap,
  61        .disable                = regulator_disable_regmap,
  62        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
  63        .set_voltage_sel        = regulator_set_voltage_sel_regmap,
  64        .set_voltage_time_sel   = regulator_set_voltage_time_sel,
  65};
  66
  67static struct regulator_ops s2mps11_buck_ops = {
  68        .list_voltage           = regulator_list_voltage_linear,
  69        .map_voltage            = regulator_map_voltage_linear,
  70        .is_enabled             = regulator_is_enabled_regmap,
  71        .enable                 = regulator_enable_regmap,
  72        .disable                = regulator_disable_regmap,
  73        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
  74        .set_voltage_sel        = regulator_set_voltage_sel_regmap,
  75        .set_voltage_time_sel   = regulator_set_voltage_time_sel,
  76};
  77
  78#define regulator_desc_ldo1(num)        {               \
  79        .name           = "LDO"#num,                    \
  80        .id             = S2MPS11_LDO##num,             \
  81        .ops            = &s2mps11_ldo_ops,             \
  82        .type           = REGULATOR_VOLTAGE,            \
  83        .owner          = THIS_MODULE,                  \
  84        .min_uV         = S2MPS11_LDO_MIN,              \
  85        .uV_step        = S2MPS11_LDO_STEP1,            \
  86        .n_voltages     = S2MPS11_LDO_N_VOLTAGES,       \
  87        .vsel_reg       = S2MPS11_REG_L1CTRL + num - 1, \
  88        .vsel_mask      = S2MPS11_LDO_VSEL_MASK,        \
  89        .enable_reg     = S2MPS11_REG_L1CTRL + num - 1, \
  90        .enable_mask    = S2MPS11_ENABLE_MASK           \
  91}
  92#define regulator_desc_ldo2(num)        {               \
  93        .name           = "LDO"#num,                    \
  94        .id             = S2MPS11_LDO##num,             \
  95        .ops            = &s2mps11_ldo_ops,             \
  96        .type           = REGULATOR_VOLTAGE,            \
  97        .owner          = THIS_MODULE,                  \
  98        .min_uV         = S2MPS11_LDO_MIN,              \
  99        .uV_step        = S2MPS11_LDO_STEP2,            \
 100        .n_voltages     = S2MPS11_LDO_N_VOLTAGES,       \
 101        .vsel_reg       = S2MPS11_REG_L1CTRL + num - 1, \
 102        .vsel_mask      = S2MPS11_LDO_VSEL_MASK,        \
 103        .enable_reg     = S2MPS11_REG_L1CTRL + num - 1, \
 104        .enable_mask    = S2MPS11_ENABLE_MASK           \
 105}
 106
 107#define regulator_desc_buck1_4(num)     {                       \
 108        .name           = "BUCK"#num,                           \
 109        .id             = S2MPS11_BUCK##num,                    \
 110        .ops            = &s2mps11_buck_ops,                    \
 111        .type           = REGULATOR_VOLTAGE,                    \
 112        .owner          = THIS_MODULE,                          \
 113        .min_uV         = S2MPS11_BUCK_MIN1,                    \
 114        .uV_step        = S2MPS11_BUCK_STEP1,                   \
 115        .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 116        .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 117        .vsel_reg       = S2MPS11_REG_B1CTRL2 + (num - 1) * 2,  \
 118        .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 119        .enable_reg     = S2MPS11_REG_B1CTRL1 + (num - 1) * 2,  \
 120        .enable_mask    = S2MPS11_ENABLE_MASK                   \
 121}
 122
 123#define regulator_desc_buck5    {                               \
 124        .name           = "BUCK5",                              \
 125        .id             = S2MPS11_BUCK5,                        \
 126        .ops            = &s2mps11_buck_ops,                    \
 127        .type           = REGULATOR_VOLTAGE,                    \
 128        .owner          = THIS_MODULE,                          \
 129        .min_uV         = S2MPS11_BUCK_MIN1,                    \
 130        .uV_step        = S2MPS11_BUCK_STEP1,                   \
 131        .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 132        .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 133        .vsel_reg       = S2MPS11_REG_B5CTRL2,                  \
 134        .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 135        .enable_reg     = S2MPS11_REG_B5CTRL1,                  \
 136        .enable_mask    = S2MPS11_ENABLE_MASK                   \
 137}
 138
 139#define regulator_desc_buck6_8(num)     {                       \
 140        .name           = "BUCK"#num,                           \
 141        .id             = S2MPS11_BUCK##num,                    \
 142        .ops            = &s2mps11_buck_ops,                    \
 143        .type           = REGULATOR_VOLTAGE,                    \
 144        .owner          = THIS_MODULE,                          \
 145        .min_uV         = S2MPS11_BUCK_MIN1,                    \
 146        .uV_step        = S2MPS11_BUCK_STEP1,                   \
 147        .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 148        .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 149        .vsel_reg       = S2MPS11_REG_B6CTRL2 + (num - 6) * 2,  \
 150        .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 151        .enable_reg     = S2MPS11_REG_B6CTRL1 + (num - 6) * 2,  \
 152        .enable_mask    = S2MPS11_ENABLE_MASK                   \
 153}
 154
 155#define regulator_desc_buck9    {                               \
 156        .name           = "BUCK9",                              \
 157        .id             = S2MPS11_BUCK9,                        \
 158        .ops            = &s2mps11_buck_ops,                    \
 159        .type           = REGULATOR_VOLTAGE,                    \
 160        .owner          = THIS_MODULE,                          \
 161        .min_uV         = S2MPS11_BUCK_MIN3,                    \
 162        .uV_step        = S2MPS11_BUCK_STEP3,                   \
 163        .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 164        .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 165        .vsel_reg       = S2MPS11_REG_B9CTRL2,                  \
 166        .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 167        .enable_reg     = S2MPS11_REG_B9CTRL1,                  \
 168        .enable_mask    = S2MPS11_ENABLE_MASK                   \
 169}
 170
 171#define regulator_desc_buck10   {                               \
 172        .name           = "BUCK10",                             \
 173        .id             = S2MPS11_BUCK10,                       \
 174        .ops            = &s2mps11_buck_ops,                    \
 175        .type           = REGULATOR_VOLTAGE,                    \
 176        .owner          = THIS_MODULE,                          \
 177        .min_uV         = S2MPS11_BUCK_MIN2,                    \
 178        .uV_step        = S2MPS11_BUCK_STEP2,                   \
 179        .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 180        .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 181        .vsel_reg       = S2MPS11_REG_B10CTRL2,                 \
 182        .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 183        .enable_reg     = S2MPS11_REG_B10CTRL1,                 \
 184        .enable_mask    = S2MPS11_ENABLE_MASK                   \
 185}
 186
 187static struct regulator_desc regulators[] = {
 188        regulator_desc_ldo2(1),
 189        regulator_desc_ldo1(2),
 190        regulator_desc_ldo1(3),
 191        regulator_desc_ldo1(4),
 192        regulator_desc_ldo1(5),
 193        regulator_desc_ldo2(6),
 194        regulator_desc_ldo1(7),
 195        regulator_desc_ldo1(8),
 196        regulator_desc_ldo1(9),
 197        regulator_desc_ldo1(10),
 198        regulator_desc_ldo2(11),
 199        regulator_desc_ldo1(12),
 200        regulator_desc_ldo1(13),
 201        regulator_desc_ldo1(14),
 202        regulator_desc_ldo1(15),
 203        regulator_desc_ldo1(16),
 204        regulator_desc_ldo1(17),
 205        regulator_desc_ldo1(18),
 206        regulator_desc_ldo1(19),
 207        regulator_desc_ldo1(20),
 208        regulator_desc_ldo1(21),
 209        regulator_desc_ldo2(22),
 210        regulator_desc_ldo2(23),
 211        regulator_desc_ldo1(24),
 212        regulator_desc_ldo1(25),
 213        regulator_desc_ldo1(26),
 214        regulator_desc_ldo2(27),
 215        regulator_desc_ldo1(28),
 216        regulator_desc_ldo1(29),
 217        regulator_desc_ldo1(30),
 218        regulator_desc_ldo1(31),
 219        regulator_desc_ldo1(32),
 220        regulator_desc_ldo1(33),
 221        regulator_desc_ldo1(34),
 222        regulator_desc_ldo1(35),
 223        regulator_desc_ldo1(36),
 224        regulator_desc_ldo1(37),
 225        regulator_desc_ldo1(38),
 226        regulator_desc_buck1_4(1),
 227        regulator_desc_buck1_4(2),
 228        regulator_desc_buck1_4(3),
 229        regulator_desc_buck1_4(4),
 230        regulator_desc_buck5,
 231        regulator_desc_buck6_8(6),
 232        regulator_desc_buck6_8(7),
 233        regulator_desc_buck6_8(8),
 234        regulator_desc_buck9,
 235        regulator_desc_buck10,
 236};
 237
 238static int s2mps11_pmic_probe(struct platform_device *pdev)
 239{
 240        struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 241        struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
 242        struct regulator_config config = { };
 243        struct s2mps11_info *s2mps11;
 244        int i, ret;
 245        unsigned char ramp_enable, ramp_reg = 0;
 246
 247        if (!pdata) {
 248                dev_err(pdev->dev.parent, "Platform data not supplied\n");
 249                return -ENODEV;
 250        }
 251
 252        s2mps11 = devm_kzalloc(&pdev->dev, sizeof(struct s2mps11_info),
 253                                GFP_KERNEL);
 254        if (!s2mps11)
 255                return -ENOMEM;
 256
 257        platform_set_drvdata(pdev, s2mps11);
 258
 259        s2mps11->ramp_delay2 = pdata->buck2_ramp_delay;
 260        s2mps11->ramp_delay34 = pdata->buck34_ramp_delay;
 261        s2mps11->ramp_delay5 = pdata->buck5_ramp_delay;
 262        s2mps11->ramp_delay16 = pdata->buck16_ramp_delay;
 263        s2mps11->ramp_delay7810 = pdata->buck7810_ramp_delay;
 264        s2mps11->ramp_delay9 = pdata->buck9_ramp_delay;
 265
 266        s2mps11->buck6_ramp = pdata->buck6_ramp_enable;
 267        s2mps11->buck2_ramp = pdata->buck2_ramp_enable;
 268        s2mps11->buck3_ramp = pdata->buck3_ramp_enable;
 269        s2mps11->buck4_ramp = pdata->buck4_ramp_enable;
 270
 271        ramp_enable = (s2mps11->buck2_ramp << 3) | (s2mps11->buck3_ramp << 2) |
 272                (s2mps11->buck4_ramp << 1) | s2mps11->buck6_ramp ;
 273
 274        if (ramp_enable) {
 275                if (s2mps11->buck2_ramp)
 276                        ramp_reg |= get_ramp_delay(s2mps11->ramp_delay2) << 6;
 277                if (s2mps11->buck3_ramp || s2mps11->buck4_ramp)
 278                        ramp_reg |= get_ramp_delay(s2mps11->ramp_delay34) << 4;
 279                sec_reg_write(iodev, S2MPS11_REG_RAMP, ramp_reg | ramp_enable);
 280        }
 281
 282        ramp_reg &= 0x00;
 283        ramp_reg |= get_ramp_delay(s2mps11->ramp_delay5) << 6;
 284        ramp_reg |= get_ramp_delay(s2mps11->ramp_delay16) << 4;
 285        ramp_reg |= get_ramp_delay(s2mps11->ramp_delay7810) << 2;
 286        ramp_reg |= get_ramp_delay(s2mps11->ramp_delay9);
 287        sec_reg_write(iodev, S2MPS11_REG_RAMP_BUCK, ramp_reg);
 288
 289        for (i = 0; i < S2MPS11_REGULATOR_MAX; i++) {
 290
 291                config.dev = &pdev->dev;
 292                config.regmap = iodev->regmap;
 293                config.init_data = pdata->regulators[i].initdata;
 294                config.driver_data = s2mps11;
 295
 296                s2mps11->rdev[i] = regulator_register(&regulators[i], &config);
 297                if (IS_ERR(s2mps11->rdev[i])) {
 298                        ret = PTR_ERR(s2mps11->rdev[i]);
 299                        dev_err(&pdev->dev, "regulator init failed for %d\n",
 300                                i);
 301                        s2mps11->rdev[i] = NULL;
 302                        goto err;
 303                }
 304        }
 305
 306        return 0;
 307err:
 308        for (i = 0; i < S2MPS11_REGULATOR_MAX; i++)
 309                regulator_unregister(s2mps11->rdev[i]);
 310
 311        return ret;
 312}
 313
 314static int s2mps11_pmic_remove(struct platform_device *pdev)
 315{
 316        struct s2mps11_info *s2mps11 = platform_get_drvdata(pdev);
 317        int i;
 318
 319        for (i = 0; i < S2MPS11_REGULATOR_MAX; i++)
 320                regulator_unregister(s2mps11->rdev[i]);
 321
 322        return 0;
 323}
 324
 325static const struct platform_device_id s2mps11_pmic_id[] = {
 326        { "s2mps11-pmic", 0},
 327        { },
 328};
 329MODULE_DEVICE_TABLE(platform, s2mps11_pmic_id);
 330
 331static struct platform_driver s2mps11_pmic_driver = {
 332        .driver = {
 333                .name = "s2mps11-pmic",
 334                .owner = THIS_MODULE,
 335        },
 336        .probe = s2mps11_pmic_probe,
 337        .remove = s2mps11_pmic_remove,
 338        .id_table = s2mps11_pmic_id,
 339};
 340
 341static int __init s2mps11_pmic_init(void)
 342{
 343        return platform_driver_register(&s2mps11_pmic_driver);
 344}
 345subsys_initcall(s2mps11_pmic_init);
 346
 347static void __exit s2mps11_pmic_exit(void)
 348{
 349        platform_driver_unregister(&s2mps11_pmic_driver);
 350}
 351module_exit(s2mps11_pmic_exit);
 352
 353/* Module information */
 354MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
 355MODULE_DESCRIPTION("SAMSUNG S2MPS11 Regulator Driver");
 356MODULE_LICENSE("GPL");
 357
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