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/of.h>
  20 #include <linux/regmap.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/regulator/driver.h>
  23 #include <linux/regulator/machine.h>
  24 #include <linux/regulator/of_regulator.h>
  25 #include <linux/mfd/samsung/core.h>
  26 #include <linux/mfd/samsung/s2mps11.h>
  27
  28 #define S2MPS11_REGULATOR_CNT ARRAY_SIZE(regulators)
  29
  30 struct s2mps11_info {
  31         struct regulator_dev *rdev[S2MPS11_REGULATOR_MAX];
  32
  33         int ramp_delay2;
  34         int ramp_delay34;
  35         int ramp_delay5;
  36         int ramp_delay16;
  37         int ramp_delay7810;
  38         int ramp_delay9;
  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
  54         if (cnt > 3)
  55                 cnt = 3;
  56
  57         return cnt;
  58 }
  59
  60 static int s2mps11_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
  61                                    unsigned int old_selector,
  62                                    unsigned int new_selector)
  63 {
  64         struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
  65         unsigned int ramp_delay = 0;
  66         int old_volt, new_volt;
  67
  68         switch (rdev->desc->id) {
  69         case S2MPS11_BUCK2:
  70                 ramp_delay = s2mps11->ramp_delay2;
  71                 break;
  72         case S2MPS11_BUCK3:
  73         case S2MPS11_BUCK4:
  74                 ramp_delay = s2mps11->ramp_delay34;
  75                 break;
  76         case S2MPS11_BUCK5:
  77                 ramp_delay = s2mps11->ramp_delay5;
  78                 break;
  79         case S2MPS11_BUCK6:
  80         case S2MPS11_BUCK1:
  81                 ramp_delay = s2mps11->ramp_delay16;
  82                 break;
  83         case S2MPS11_BUCK7:
  84         case S2MPS11_BUCK8:
  85         case S2MPS11_BUCK10:
  86                 ramp_delay = s2mps11->ramp_delay7810;
  87                 break;
  88         case S2MPS11_BUCK9:
  89                 ramp_delay = s2mps11->ramp_delay9;
  90         }
  91
  92         if (ramp_delay == 0)
  93                 ramp_delay = rdev->desc->ramp_delay;
  94
  95         old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector);
  96         new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector);
  97
  98         return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay);
  99 }
 100
 101 static int s2mps11_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 102 {
 103         struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
 104         unsigned int ramp_val, ramp_shift, ramp_reg = S2MPS11_REG_RAMP_BUCK;
 105         unsigned int ramp_enable = 1, enable_shift = 0;
 106         int ret;
 107
 108         switch (rdev->desc->id) {
 109         case S2MPS11_BUCK1:
 110                 if (ramp_delay > s2mps11->ramp_delay16)
 111                         s2mps11->ramp_delay16 = ramp_delay;
 112                 else
 113                         ramp_delay = s2mps11->ramp_delay16;
 114
 115                 ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT;
 116                 break;
 117         case S2MPS11_BUCK2:
 118                 enable_shift = S2MPS11_BUCK2_RAMP_EN_SHIFT;
 119                 if (!ramp_delay) {
 120                         ramp_enable = 0;
 121                         break;
 122                 }
 123
 124                 s2mps11->ramp_delay2 = ramp_delay;
 125                 ramp_shift = S2MPS11_BUCK2_RAMP_SHIFT;
 126                 ramp_reg = S2MPS11_REG_RAMP;
 127                 break;
 128         case S2MPS11_BUCK3:
 129                 enable_shift = S2MPS11_BUCK3_RAMP_EN_SHIFT;
 130                 if (!ramp_delay) {
 131                         ramp_enable = 0;
 132                         break;
 133                 }
 134
 135                 if (ramp_delay > s2mps11->ramp_delay34)
 136                         s2mps11->ramp_delay34 = ramp_delay;
 137                 else
 138                         ramp_delay = s2mps11->ramp_delay34;
 139
 140                 ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
 141                 ramp_reg = S2MPS11_REG_RAMP;
 142                 break;
 143         case S2MPS11_BUCK4:
 144                 enable_shift = S2MPS11_BUCK4_RAMP_EN_SHIFT;
 145                 if (!ramp_delay) {
 146                         ramp_enable = 0;
 147                         break;
 148                 }
 149
 150                 if (ramp_delay > s2mps11->ramp_delay34)
 151                         s2mps11->ramp_delay34 = ramp_delay;
 152                 else
 153                         ramp_delay = s2mps11->ramp_delay34;
 154
 155                 ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
 156                 ramp_reg = S2MPS11_REG_RAMP;
 157                 break;
 158         case S2MPS11_BUCK5:
 159                 s2mps11->ramp_delay5 = ramp_delay;
 160                 ramp_shift = S2MPS11_BUCK5_RAMP_SHIFT;
 161                 break;
 162         case S2MPS11_BUCK6:
 163                 enable_shift = S2MPS11_BUCK6_RAMP_EN_SHIFT;
 164                 if (!ramp_delay) {
 165                         ramp_enable = 0;
 166                         break;
 167                 }
 168
 169                 if (ramp_delay > s2mps11->ramp_delay16)
 170                         s2mps11->ramp_delay16 = ramp_delay;
 171                 else
 172                         ramp_delay = s2mps11->ramp_delay16;
 173
 174                 ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT;
 175                 break;
 176         case S2MPS11_BUCK7:
 177         case S2MPS11_BUCK8:
 178         case S2MPS11_BUCK10:
 179                 if (ramp_delay > s2mps11->ramp_delay7810)
 180                         s2mps11->ramp_delay7810 = ramp_delay;
 181                 else
 182                         ramp_delay = s2mps11->ramp_delay7810;
 183
 184                 ramp_shift = S2MPS11_BUCK7810_RAMP_SHIFT;
 185                 break;
 186         case S2MPS11_BUCK9:
 187                 s2mps11->ramp_delay9 = ramp_delay;
 188                 ramp_shift = S2MPS11_BUCK9_RAMP_SHIFT;
 189                 break;
 190         default:
 191                 return 0;
 192         }
 193
 194         if (!ramp_enable)
 195                 goto ramp_disable;
 196
 197         if (enable_shift) {
 198                 ret = regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
 199                                         1 << enable_shift, 1 << enable_shift);
 200                 if (ret) {
 201                         dev_err(&rdev->dev, "failed to enable ramp rate\n");
 202                         return ret;
 203                 }
 204         }
 205
 206         ramp_val = get_ramp_delay(ramp_delay);
 207
 208         return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
 209                                   ramp_val << ramp_shift);
 210
 211 ramp_disable:
 212         return regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
 213                                   1 << enable_shift, 0);
 214 }
 215
 216 static struct regulator_ops s2mps11_ldo_ops = {
 217         .list_voltage           = regulator_list_voltage_linear,
 218         .map_voltage            = regulator_map_voltage_linear,
 219         .is_enabled             = regulator_is_enabled_regmap,
 220         .enable                 = regulator_enable_regmap,
 221         .disable                = regulator_disable_regmap,
 222         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 223         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 224         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 225 };
 226
 227 static struct regulator_ops s2mps11_buck_ops = {
 228         .list_voltage           = regulator_list_voltage_linear,
 229         .map_voltage            = regulator_map_voltage_linear,
 230         .is_enabled             = regulator_is_enabled_regmap,
 231         .enable                 = regulator_enable_regmap,
 232         .disable                = regulator_disable_regmap,
 233         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 234         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 235         .set_voltage_time_sel   = s2mps11_regulator_set_voltage_time_sel,
 236         .set_ramp_delay         = s2mps11_set_ramp_delay,
 237 };
 238
 239 #define regulator_desc_ldo1(num)        {               \
 240         .name           = "LDO"#num,                    \
 241         .id             = S2MPS11_LDO##num,             \
 242         .ops            = &s2mps11_ldo_ops,             \
 243         .type           = REGULATOR_VOLTAGE,            \
 244         .owner          = THIS_MODULE,                  \
 245         .min_uV         = S2MPS11_LDO_MIN,              \
 246         .uV_step        = S2MPS11_LDO_STEP1,            \
 247         .n_voltages     = S2MPS11_LDO_N_VOLTAGES,       \
 248         .vsel_reg       = S2MPS11_REG_L1CTRL + num - 1, \
 249         .vsel_mask      = S2MPS11_LDO_VSEL_MASK,        \
 250         .enable_reg     = S2MPS11_REG_L1CTRL + num - 1, \
 251         .enable_mask    = S2MPS11_ENABLE_MASK           \
 252 }
 253 #define regulator_desc_ldo2(num)        {               \
 254         .name           = "LDO"#num,                    \
 255         .id             = S2MPS11_LDO##num,             \
 256         .ops            = &s2mps11_ldo_ops,             \
 257         .type           = REGULATOR_VOLTAGE,            \
 258         .owner          = THIS_MODULE,                  \
 259         .min_uV         = S2MPS11_LDO_MIN,              \
 260         .uV_step        = S2MPS11_LDO_STEP2,            \
 261         .n_voltages     = S2MPS11_LDO_N_VOLTAGES,       \
 262         .vsel_reg       = S2MPS11_REG_L1CTRL + num - 1, \
 263         .vsel_mask      = S2MPS11_LDO_VSEL_MASK,        \
 264         .enable_reg     = S2MPS11_REG_L1CTRL + num - 1, \
 265         .enable_mask    = S2MPS11_ENABLE_MASK           \
 266 }
 267
 268 #define regulator_desc_buck1_4(num)     {                       \
 269         .name           = "BUCK"#num,                           \
 270         .id             = S2MPS11_BUCK##num,                    \
 271         .ops            = &s2mps11_buck_ops,                    \
 272         .type           = REGULATOR_VOLTAGE,                    \
 273         .owner          = THIS_MODULE,                          \
 274         .min_uV         = S2MPS11_BUCK_MIN1,                    \
 275         .uV_step        = S2MPS11_BUCK_STEP1,                   \
 276         .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 277         .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 278         .vsel_reg       = S2MPS11_REG_B1CTRL2 + (num - 1) * 2,  \
 279         .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 280         .enable_reg     = S2MPS11_REG_B1CTRL1 + (num - 1) * 2,  \
 281         .enable_mask    = S2MPS11_ENABLE_MASK                   \
 282 }
 283
 284 #define regulator_desc_buck5    {                               \
 285         .name           = "BUCK5",                              \
 286         .id             = S2MPS11_BUCK5,                        \
 287         .ops            = &s2mps11_buck_ops,                    \
 288         .type           = REGULATOR_VOLTAGE,                    \
 289         .owner          = THIS_MODULE,                          \
 290         .min_uV         = S2MPS11_BUCK_MIN1,                    \
 291         .uV_step        = S2MPS11_BUCK_STEP1,                   \
 292         .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 293         .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 294         .vsel_reg       = S2MPS11_REG_B5CTRL2,                  \
 295         .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 296         .enable_reg     = S2MPS11_REG_B5CTRL1,                  \
 297         .enable_mask    = S2MPS11_ENABLE_MASK                   \
 298 }
 299
 300 #define regulator_desc_buck6_8(num)     {                       \
 301         .name           = "BUCK"#num,                           \
 302         .id             = S2MPS11_BUCK##num,                    \
 303         .ops            = &s2mps11_buck_ops,                    \
 304         .type           = REGULATOR_VOLTAGE,                    \
 305         .owner          = THIS_MODULE,                          \
 306         .min_uV         = S2MPS11_BUCK_MIN1,                    \
 307         .uV_step        = S2MPS11_BUCK_STEP1,                   \
 308         .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 309         .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 310         .vsel_reg       = S2MPS11_REG_B6CTRL2 + (num - 6) * 2,  \
 311         .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 312         .enable_reg     = S2MPS11_REG_B6CTRL1 + (num - 6) * 2,  \
 313         .enable_mask    = S2MPS11_ENABLE_MASK                   \
 314 }
 315
 316 #define regulator_desc_buck9    {                               \
 317         .name           = "BUCK9",                              \
 318         .id             = S2MPS11_BUCK9,                        \
 319         .ops            = &s2mps11_buck_ops,                    \
 320         .type           = REGULATOR_VOLTAGE,                    \
 321         .owner          = THIS_MODULE,                          \
 322         .min_uV         = S2MPS11_BUCK_MIN3,                    \
 323         .uV_step        = S2MPS11_BUCK_STEP3,                   \
 324         .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 325         .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 326         .vsel_reg       = S2MPS11_REG_B9CTRL2,                  \
 327         .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 328         .enable_reg     = S2MPS11_REG_B9CTRL1,                  \
 329         .enable_mask    = S2MPS11_ENABLE_MASK                   \
 330 }
 331
 332 #define regulator_desc_buck10   {                               \
 333         .name           = "BUCK10",                             \
 334         .id             = S2MPS11_BUCK10,                       \
 335         .ops            = &s2mps11_buck_ops,                    \
 336         .type           = REGULATOR_VOLTAGE,                    \
 337         .owner          = THIS_MODULE,                          \
 338         .min_uV         = S2MPS11_BUCK_MIN2,                    \
 339         .uV_step        = S2MPS11_BUCK_STEP2,                   \
 340         .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 341         .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 342         .vsel_reg       = S2MPS11_REG_B10CTRL2,                 \
 343         .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 344         .enable_reg     = S2MPS11_REG_B10CTRL1,                 \
 345         .enable_mask    = S2MPS11_ENABLE_MASK                   \
 346 }
 347
 348 static struct regulator_desc regulators[] = {
 349         regulator_desc_ldo2(1),
 350         regulator_desc_ldo1(2),
 351         regulator_desc_ldo1(3),
 352         regulator_desc_ldo1(4),
 353         regulator_desc_ldo1(5),
 354         regulator_desc_ldo2(6),
 355         regulator_desc_ldo1(7),
 356         regulator_desc_ldo1(8),
 357         regulator_desc_ldo1(9),
 358         regulator_desc_ldo1(10),
 359         regulator_desc_ldo2(11),
 360         regulator_desc_ldo1(12),
 361         regulator_desc_ldo1(13),
 362         regulator_desc_ldo1(14),
 363         regulator_desc_ldo1(15),
 364         regulator_desc_ldo1(16),
 365         regulator_desc_ldo1(17),
 366         regulator_desc_ldo1(18),
 367         regulator_desc_ldo1(19),
 368         regulator_desc_ldo1(20),
 369         regulator_desc_ldo1(21),
 370         regulator_desc_ldo2(22),
 371         regulator_desc_ldo2(23),
 372         regulator_desc_ldo1(24),
 373         regulator_desc_ldo1(25),
 374         regulator_desc_ldo1(26),
 375         regulator_desc_ldo2(27),
 376         regulator_desc_ldo1(28),
 377         regulator_desc_ldo1(29),
 378         regulator_desc_ldo1(30),
 379         regulator_desc_ldo1(31),
 380         regulator_desc_ldo1(32),
 381         regulator_desc_ldo1(33),
 382         regulator_desc_ldo1(34),
 383         regulator_desc_ldo1(35),
 384         regulator_desc_ldo1(36),
 385         regulator_desc_ldo1(37),
 386         regulator_desc_ldo1(38),
 387         regulator_desc_buck1_4(1),
 388         regulator_desc_buck1_4(2),
 389         regulator_desc_buck1_4(3),
 390         regulator_desc_buck1_4(4),
 391         regulator_desc_buck5,
 392         regulator_desc_buck6_8(6),
 393         regulator_desc_buck6_8(7),
 394         regulator_desc_buck6_8(8),
 395         regulator_desc_buck9,
 396         regulator_desc_buck10,
 397 };
 398
 399 static int s2mps11_pmic_probe(struct platform_device *pdev)
 400 {
 401         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 402         struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
 403         struct of_regulator_match rdata[S2MPS11_REGULATOR_MAX];
 404         struct device_node *reg_np = NULL;
 405         struct regulator_config config = { };
 406         struct s2mps11_info *s2mps11;
 407         int i, ret;
 408
 409         s2mps11 = devm_kzalloc(&pdev->dev, sizeof(struct s2mps11_info),
 410                                 GFP_KERNEL);
 411         if (!s2mps11)
 412                 return -ENOMEM;
 413
 414         if (!iodev->dev->of_node) {
 415                 if (pdata) {
 416                         goto common_reg;
 417                 } else {
 418                         dev_err(pdev->dev.parent,
 419                                 "Platform data or DT node not supplied\n");
 420                         return -ENODEV;
 421                 }
 422         }
 423
 424         for (i = 0; i < S2MPS11_REGULATOR_CNT; i++)
 425                 rdata[i].name = regulators[i].name;
 426
 427         reg_np = of_find_node_by_name(iodev->dev->of_node, "regulators");
 428         if (!reg_np) {
 429                 dev_err(&pdev->dev, "could not find regulators sub-node\n");
 430                 return -EINVAL;
 431         }
 432
 433         of_regulator_match(&pdev->dev, reg_np, rdata, S2MPS11_REGULATOR_MAX);
 434
 435 common_reg:
 436         platform_set_drvdata(pdev, s2mps11);
 437
 438         config.dev = &pdev->dev;
 439         config.regmap = iodev->regmap_pmic;
 440         config.driver_data = s2mps11;
 441         for (i = 0; i < S2MPS11_REGULATOR_MAX; i++) {
 442                 if (!reg_np) {
 443                         config.init_data = pdata->regulators[i].initdata;
 444                 } else {
 445                         config.init_data = rdata[i].init_data;
 446                         config.of_node = rdata[i].of_node;
 447                 }
 448
 449                 s2mps11->rdev[i] = devm_regulator_register(&pdev->dev,
 450                                                 &regulators[i], &config);
 451                 if (IS_ERR(s2mps11->rdev[i])) {
 452                         ret = PTR_ERR(s2mps11->rdev[i]);
 453                         dev_err(&pdev->dev, "regulator init failed for %d\n",
 454                                 i);
 455                         return ret;
 456                 }
 457         }
 458
 459         return 0;
 460 }
 461
 462 static const struct platform_device_id s2mps11_pmic_id[] = {
 463         { "s2mps11-pmic", 0},
 464         { },
 465 };
 466 MODULE_DEVICE_TABLE(platform, s2mps11_pmic_id);
 467
 468 static struct platform_driver s2mps11_pmic_driver = {
 469         .driver = {
 470                 .name = "s2mps11-pmic",
 471                 .owner = THIS_MODULE,
 472         },
 473         .probe = s2mps11_pmic_probe,
 474         .id_table = s2mps11_pmic_id,
 475 };
 476
 477 static int __init s2mps11_pmic_init(void)
 478 {
 479         return platform_driver_register(&s2mps11_pmic_driver);
 480 }
 481 subsys_initcall(s2mps11_pmic_init);
 482
 483 static void __exit s2mps11_pmic_exit(void)
 484 {
 485         platform_driver_unregister(&s2mps11_pmic_driver);
 486 }
 487 module_exit(s2mps11_pmic_exit);
 488
 489 /* Module information */
 490 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
 491 MODULE_DESCRIPTION("SAMSUNG S2MPS11 Regulator Driver");
 492 MODULE_LICENSE("GPL");