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/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
  25 struct 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
  41 static 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
  56 static 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
  67 static 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
 187 static 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
 238 static 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;
 307 err:
 308         for (i = 0; i < S2MPS11_REGULATOR_MAX; i++)
 309                 regulator_unregister(s2mps11->rdev[i]);
 310
 311         return ret;
 312 }
 313
 314 static 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
 325 static const struct platform_device_id s2mps11_pmic_id[] = {
 326         { "s2mps11-pmic", 0},
 327         { },
 328 };
 329 MODULE_DEVICE_TABLE(platform, s2mps11_pmic_id);
 330
 331 static 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
 341 static int __init s2mps11_pmic_init(void)
 342 {
 343         return platform_driver_register(&s2mps11_pmic_driver);
 344 }
 345 subsys_initcall(s2mps11_pmic_init);
 346
 347 static void __exit s2mps11_pmic_exit(void)
 348 {
 349         platform_driver_unregister(&s2mps11_pmic_driver);
 350 }
 351 module_exit(s2mps11_pmic_exit);
 352
 353 /* Module information */
 354 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
 355 MODULE_DESCRIPTION("SAMSUNG S2MPS11 Regulator Driver");
 356 MODULE_LICENSE("GPL");