drivers/regulator/s2mps11.c

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