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         int ramp_delay2;
  32         int ramp_delay34;
  33         int ramp_delay5;
  34         int ramp_delay16;
  35         int ramp_delay7810;
  36         int ramp_delay9;
  37 };
  38
  39 static int get_ramp_delay(int ramp_delay)
  40 {
  41         unsigned char cnt = 0;
  42
  43         ramp_delay /= 6250;
  44
  45         while (true) {
  46                 ramp_delay = ramp_delay >> 1;
  47                 if (ramp_delay == 0)
  48                         break;
  49                 cnt++;
  50         }
  51
  52         if (cnt > 3)
  53                 cnt = 3;
  54
  55         return cnt;
  56 }
  57
  58 static int s2mps11_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
  59                                    unsigned int old_selector,
  60                                    unsigned int new_selector)
  61 {
  62         struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
  63         unsigned int ramp_delay = 0;
  64         int old_volt, new_volt;
  65
  66         switch (rdev->desc->id) {
  67         case S2MPS11_BUCK2:
  68                 ramp_delay = s2mps11->ramp_delay2;
  69                 break;
  70         case S2MPS11_BUCK3:
  71         case S2MPS11_BUCK4:
  72                 ramp_delay = s2mps11->ramp_delay34;
  73                 break;
  74         case S2MPS11_BUCK5:
  75                 ramp_delay = s2mps11->ramp_delay5;
  76                 break;
  77         case S2MPS11_BUCK6:
  78         case S2MPS11_BUCK1:
  79                 ramp_delay = s2mps11->ramp_delay16;
  80                 break;
  81         case S2MPS11_BUCK7:
  82         case S2MPS11_BUCK8:
  83         case S2MPS11_BUCK10:
  84                 ramp_delay = s2mps11->ramp_delay7810;
  85                 break;
  86         case S2MPS11_BUCK9:
  87                 ramp_delay = s2mps11->ramp_delay9;
  88         }
  89
  90         if (ramp_delay == 0)
  91                 ramp_delay = rdev->desc->ramp_delay;
  92
  93         old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector);
  94         new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector);
  95
  96         return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay);
  97 }
  98
  99 static int s2mps11_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 100 {
 101         struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
 102         unsigned int ramp_val, ramp_shift, ramp_reg = S2MPS11_REG_RAMP_BUCK;
 103         unsigned int ramp_enable = 1, enable_shift = 0;
 104         int ret;
 105
 106         switch (rdev->desc->id) {
 107         case S2MPS11_BUCK1:
 108                 if (ramp_delay > s2mps11->ramp_delay16)
 109                         s2mps11->ramp_delay16 = ramp_delay;
 110                 else
 111                         ramp_delay = s2mps11->ramp_delay16;
 112
 113                 ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT;
 114                 break;
 115         case S2MPS11_BUCK2:
 116                 enable_shift = S2MPS11_BUCK2_RAMP_EN_SHIFT;
 117                 if (!ramp_delay) {
 118                         ramp_enable = 0;
 119                         break;
 120                 }
 121
 122                 s2mps11->ramp_delay2 = ramp_delay;
 123                 ramp_shift = S2MPS11_BUCK2_RAMP_SHIFT;
 124                 ramp_reg = S2MPS11_REG_RAMP;
 125                 break;
 126         case S2MPS11_BUCK3:
 127                 enable_shift = S2MPS11_BUCK3_RAMP_EN_SHIFT;
 128                 if (!ramp_delay) {
 129                         ramp_enable = 0;
 130                         break;
 131                 }
 132
 133                 if (ramp_delay > s2mps11->ramp_delay34)
 134                         s2mps11->ramp_delay34 = ramp_delay;
 135                 else
 136                         ramp_delay = s2mps11->ramp_delay34;
 137
 138                 ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
 139                 ramp_reg = S2MPS11_REG_RAMP;
 140                 break;
 141         case S2MPS11_BUCK4:
 142                 enable_shift = S2MPS11_BUCK4_RAMP_EN_SHIFT;
 143                 if (!ramp_delay) {
 144                         ramp_enable = 0;
 145                         break;
 146                 }
 147
 148                 if (ramp_delay > s2mps11->ramp_delay34)
 149                         s2mps11->ramp_delay34 = ramp_delay;
 150                 else
 151                         ramp_delay = s2mps11->ramp_delay34;
 152
 153                 ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
 154                 ramp_reg = S2MPS11_REG_RAMP;
 155                 break;
 156         case S2MPS11_BUCK5:
 157                 s2mps11->ramp_delay5 = ramp_delay;
 158                 ramp_shift = S2MPS11_BUCK5_RAMP_SHIFT;
 159                 break;
 160         case S2MPS11_BUCK6:
 161                 enable_shift = S2MPS11_BUCK6_RAMP_EN_SHIFT;
 162                 if (!ramp_delay) {
 163                         ramp_enable = 0;
 164                         break;
 165                 }
 166
 167                 if (ramp_delay > s2mps11->ramp_delay16)
 168                         s2mps11->ramp_delay16 = ramp_delay;
 169                 else
 170                         ramp_delay = s2mps11->ramp_delay16;
 171
 172                 ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT;
 173                 break;
 174         case S2MPS11_BUCK7:
 175         case S2MPS11_BUCK8:
 176         case S2MPS11_BUCK10:
 177                 if (ramp_delay > s2mps11->ramp_delay7810)
 178                         s2mps11->ramp_delay7810 = ramp_delay;
 179                 else
 180                         ramp_delay = s2mps11->ramp_delay7810;
 181
 182                 ramp_shift = S2MPS11_BUCK7810_RAMP_SHIFT;
 183                 break;
 184         case S2MPS11_BUCK9:
 185                 s2mps11->ramp_delay9 = ramp_delay;
 186                 ramp_shift = S2MPS11_BUCK9_RAMP_SHIFT;
 187                 break;
 188         default:
 189                 return 0;
 190         }
 191
 192         if (!ramp_enable)
 193                 goto ramp_disable;
 194
 195         if (enable_shift) {
 196                 ret = regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
 197                                         1 << enable_shift, 1 << enable_shift);
 198                 if (ret) {
 199                         dev_err(&rdev->dev, "failed to enable ramp rate\n");
 200                         return ret;
 201                 }
 202         }
 203
 204         ramp_val = get_ramp_delay(ramp_delay);
 205
 206         return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
 207                                   ramp_val << ramp_shift);
 208
 209 ramp_disable:
 210         return regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
 211                                   1 << enable_shift, 0);
 212 }
 213
 214 static struct regulator_ops s2mps11_ldo_ops = {
 215         .list_voltage           = regulator_list_voltage_linear,
 216         .map_voltage            = regulator_map_voltage_linear,
 217         .is_enabled             = regulator_is_enabled_regmap,
 218         .enable                 = regulator_enable_regmap,
 219         .disable                = regulator_disable_regmap,
 220         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 221         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 222         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 223 };
 224
 225 static struct regulator_ops s2mps11_buck_ops = {
 226         .list_voltage           = regulator_list_voltage_linear,
 227         .map_voltage            = regulator_map_voltage_linear,
 228         .is_enabled             = regulator_is_enabled_regmap,
 229         .enable                 = regulator_enable_regmap,
 230         .disable                = regulator_disable_regmap,
 231         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 232         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 233         .set_voltage_time_sel   = s2mps11_regulator_set_voltage_time_sel,
 234         .set_ramp_delay         = s2mps11_set_ramp_delay,
 235 };
 236
 237 #define regulator_desc_ldo1(num)        {               \
 238         .name           = "LDO"#num,                    \
 239         .id             = S2MPS11_LDO##num,             \
 240         .ops            = &s2mps11_ldo_ops,             \
 241         .type           = REGULATOR_VOLTAGE,            \
 242         .owner          = THIS_MODULE,                  \
 243         .min_uV         = S2MPS11_LDO_MIN,              \
 244         .uV_step        = S2MPS11_LDO_STEP1,            \
 245         .n_voltages     = S2MPS11_LDO_N_VOLTAGES,       \
 246         .vsel_reg       = S2MPS11_REG_L1CTRL + num - 1, \
 247         .vsel_mask      = S2MPS11_LDO_VSEL_MASK,        \
 248         .enable_reg     = S2MPS11_REG_L1CTRL + num - 1, \
 249         .enable_mask    = S2MPS11_ENABLE_MASK           \
 250 }
 251 #define regulator_desc_ldo2(num)        {               \
 252         .name           = "LDO"#num,                    \
 253         .id             = S2MPS11_LDO##num,             \
 254         .ops            = &s2mps11_ldo_ops,             \
 255         .type           = REGULATOR_VOLTAGE,            \
 256         .owner          = THIS_MODULE,                  \
 257         .min_uV         = S2MPS11_LDO_MIN,              \
 258         .uV_step        = S2MPS11_LDO_STEP2,            \
 259         .n_voltages     = S2MPS11_LDO_N_VOLTAGES,       \
 260         .vsel_reg       = S2MPS11_REG_L1CTRL + num - 1, \
 261         .vsel_mask      = S2MPS11_LDO_VSEL_MASK,        \
 262         .enable_reg     = S2MPS11_REG_L1CTRL + num - 1, \
 263         .enable_mask    = S2MPS11_ENABLE_MASK           \
 264 }
 265
 266 #define regulator_desc_buck1_4(num)     {                       \
 267         .name           = "BUCK"#num,                           \
 268         .id             = S2MPS11_BUCK##num,                    \
 269         .ops            = &s2mps11_buck_ops,                    \
 270         .type           = REGULATOR_VOLTAGE,                    \
 271         .owner          = THIS_MODULE,                          \
 272         .min_uV         = S2MPS11_BUCK_MIN1,                    \
 273         .uV_step        = S2MPS11_BUCK_STEP1,                   \
 274         .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 275         .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 276         .vsel_reg       = S2MPS11_REG_B1CTRL2 + (num - 1) * 2,  \
 277         .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 278         .enable_reg     = S2MPS11_REG_B1CTRL1 + (num - 1) * 2,  \
 279         .enable_mask    = S2MPS11_ENABLE_MASK                   \
 280 }
 281
 282 #define regulator_desc_buck5    {                               \
 283         .name           = "BUCK5",                              \
 284         .id             = S2MPS11_BUCK5,                        \
 285         .ops            = &s2mps11_buck_ops,                    \
 286         .type           = REGULATOR_VOLTAGE,                    \
 287         .owner          = THIS_MODULE,                          \
 288         .min_uV         = S2MPS11_BUCK_MIN1,                    \
 289         .uV_step        = S2MPS11_BUCK_STEP1,                   \
 290         .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 291         .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 292         .vsel_reg       = S2MPS11_REG_B5CTRL2,                  \
 293         .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 294         .enable_reg     = S2MPS11_REG_B5CTRL1,                  \
 295         .enable_mask    = S2MPS11_ENABLE_MASK                   \
 296 }
 297
 298 #define regulator_desc_buck6_8(num)     {                       \
 299         .name           = "BUCK"#num,                           \
 300         .id             = S2MPS11_BUCK##num,                    \
 301         .ops            = &s2mps11_buck_ops,                    \
 302         .type           = REGULATOR_VOLTAGE,                    \
 303         .owner          = THIS_MODULE,                          \
 304         .min_uV         = S2MPS11_BUCK_MIN1,                    \
 305         .uV_step        = S2MPS11_BUCK_STEP1,                   \
 306         .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 307         .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 308         .vsel_reg       = S2MPS11_REG_B6CTRL2 + (num - 6) * 2,  \
 309         .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 310         .enable_reg     = S2MPS11_REG_B6CTRL1 + (num - 6) * 2,  \
 311         .enable_mask    = S2MPS11_ENABLE_MASK                   \
 312 }
 313
 314 #define regulator_desc_buck9    {                               \
 315         .name           = "BUCK9",                              \
 316         .id             = S2MPS11_BUCK9,                        \
 317         .ops            = &s2mps11_buck_ops,                    \
 318         .type           = REGULATOR_VOLTAGE,                    \
 319         .owner          = THIS_MODULE,                          \
 320         .min_uV         = S2MPS11_BUCK_MIN3,                    \
 321         .uV_step        = S2MPS11_BUCK_STEP3,                   \
 322         .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 323         .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 324         .vsel_reg       = S2MPS11_REG_B9CTRL2,                  \
 325         .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 326         .enable_reg     = S2MPS11_REG_B9CTRL1,                  \
 327         .enable_mask    = S2MPS11_ENABLE_MASK                   \
 328 }
 329
 330 #define regulator_desc_buck10   {                               \
 331         .name           = "BUCK10",                             \
 332         .id             = S2MPS11_BUCK10,                       \
 333         .ops            = &s2mps11_buck_ops,                    \
 334         .type           = REGULATOR_VOLTAGE,                    \
 335         .owner          = THIS_MODULE,                          \
 336         .min_uV         = S2MPS11_BUCK_MIN2,                    \
 337         .uV_step        = S2MPS11_BUCK_STEP2,                   \
 338         .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 339         .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 340         .vsel_reg       = S2MPS11_REG_B10CTRL2,                 \
 341         .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 342         .enable_reg     = S2MPS11_REG_B10CTRL1,                 \
 343         .enable_mask    = S2MPS11_ENABLE_MASK                   \
 344 }
 345
 346 static const struct regulator_desc regulators[] = {
 347         regulator_desc_ldo2(1),
 348         regulator_desc_ldo1(2),
 349         regulator_desc_ldo1(3),
 350         regulator_desc_ldo1(4),
 351         regulator_desc_ldo1(5),
 352         regulator_desc_ldo2(6),
 353         regulator_desc_ldo1(7),
 354         regulator_desc_ldo1(8),
 355         regulator_desc_ldo1(9),
 356         regulator_desc_ldo1(10),
 357         regulator_desc_ldo2(11),
 358         regulator_desc_ldo1(12),
 359         regulator_desc_ldo1(13),
 360         regulator_desc_ldo1(14),
 361         regulator_desc_ldo1(15),
 362         regulator_desc_ldo1(16),
 363         regulator_desc_ldo1(17),
 364         regulator_desc_ldo1(18),
 365         regulator_desc_ldo1(19),
 366         regulator_desc_ldo1(20),
 367         regulator_desc_ldo1(21),
 368         regulator_desc_ldo2(22),
 369         regulator_desc_ldo2(23),
 370         regulator_desc_ldo1(24),
 371         regulator_desc_ldo1(25),
 372         regulator_desc_ldo1(26),
 373         regulator_desc_ldo2(27),
 374         regulator_desc_ldo1(28),
 375         regulator_desc_ldo1(29),
 376         regulator_desc_ldo1(30),
 377         regulator_desc_ldo1(31),
 378         regulator_desc_ldo1(32),
 379         regulator_desc_ldo1(33),
 380         regulator_desc_ldo1(34),
 381         regulator_desc_ldo1(35),
 382         regulator_desc_ldo1(36),
 383         regulator_desc_ldo1(37),
 384         regulator_desc_ldo1(38),
 385         regulator_desc_buck1_4(1),
 386         regulator_desc_buck1_4(2),
 387         regulator_desc_buck1_4(3),
 388         regulator_desc_buck1_4(4),
 389         regulator_desc_buck5,
 390         regulator_desc_buck6_8(6),
 391         regulator_desc_buck6_8(7),
 392         regulator_desc_buck6_8(8),
 393         regulator_desc_buck9,
 394         regulator_desc_buck10,
 395 };
 396
 397 static int s2mps11_pmic_probe(struct platform_device *pdev)
 398 {
 399         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 400         struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
 401         struct of_regulator_match rdata[S2MPS11_REGULATOR_MAX];
 402         struct device_node *reg_np = NULL;
 403         struct regulator_config config = { };
 404         struct s2mps11_info *s2mps11;
 405         int i, ret;
 406
 407         s2mps11 = devm_kzalloc(&pdev->dev, sizeof(struct s2mps11_info),
 408                                 GFP_KERNEL);
 409         if (!s2mps11)
 410                 return -ENOMEM;
 411
 412         if (!iodev->dev->of_node) {
 413                 if (pdata) {
 414                         goto common_reg;
 415                 } else {
 416                         dev_err(pdev->dev.parent,
 417                                 "Platform data or DT node not supplied\n");
 418                         return -ENODEV;
 419                 }
 420         }
 421
 422         for (i = 0; i < S2MPS11_REGULATOR_CNT; i++)
 423                 rdata[i].name = regulators[i].name;
 424
 425         reg_np = of_find_node_by_name(iodev->dev->of_node, "regulators");
 426         if (!reg_np) {
 427                 dev_err(&pdev->dev, "could not find regulators sub-node\n");
 428                 return -EINVAL;
 429         }
 430
 431         of_regulator_match(&pdev->dev, reg_np, rdata, S2MPS11_REGULATOR_MAX);
 432
 433 common_reg:
 434         platform_set_drvdata(pdev, s2mps11);
 435
 436         config.dev = &pdev->dev;
 437         config.regmap = iodev->regmap_pmic;
 438         config.driver_data = s2mps11;
 439         for (i = 0; i < S2MPS11_REGULATOR_MAX; i++) {
 440                 struct regulator_dev *regulator;
 441
 442                 if (!reg_np) {
 443                         config.init_data = pdata->regulators[i].initdata;
 444                         config.of_node = pdata->regulators[i].reg_node;
 445                 } else {
 446                         config.init_data = rdata[i].init_data;
 447                         config.of_node = rdata[i].of_node;
 448                 }
 449
 450                 regulator = devm_regulator_register(&pdev->dev,
 451                                                 &regulators[i], &config);
 452                 if (IS_ERR(regulator)) {
 453                         ret = PTR_ERR(regulator);
 454                         dev_err(&pdev->dev, "regulator init failed for %d\n",
 455                                 i);
 456                         return ret;
 457                 }
 458         }
 459
 460         return 0;
 461 }
 462
 463 static const struct platform_device_id s2mps11_pmic_id[] = {
 464         { "s2mps11-pmic", 0},
 465         { },
 466 };
 467 MODULE_DEVICE_TABLE(platform, s2mps11_pmic_id);
 468
 469 static struct platform_driver s2mps11_pmic_driver = {
 470         .driver = {
 471                 .name = "s2mps11-pmic",
 472                 .owner = THIS_MODULE,
 473         },
 474         .probe = s2mps11_pmic_probe,
 475         .id_table = s2mps11_pmic_id,
 476 };
 477
 478 static int __init s2mps11_pmic_init(void)
 479 {
 480         return platform_driver_register(&s2mps11_pmic_driver);
 481 }
 482 subsys_initcall(s2mps11_pmic_init);
 483
 484 static void __exit s2mps11_pmic_exit(void)
 485 {
 486         platform_driver_unregister(&s2mps11_pmic_driver);
 487 }
 488 module_exit(s2mps11_pmic_exit);
 489
 490 /* Module information */
 491 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
 492 MODULE_DESCRIPTION("SAMSUNG S2MPS11 Regulator Driver");
 493 MODULE_LICENSE("GPL");