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 struct s2mps11_info {
  29         unsigned int rdev_num;
  30         int ramp_delay2;
  31         int ramp_delay34;
  32         int ramp_delay5;
  33         int ramp_delay16;
  34         int ramp_delay7810;
  35         int ramp_delay9;
  36 };
  37
  38 static int get_ramp_delay(int ramp_delay)
  39 {
  40         unsigned char cnt = 0;
  41
  42         ramp_delay /= 6250;
  43
  44         while (true) {
  45                 ramp_delay = ramp_delay >> 1;
  46                 if (ramp_delay == 0)
  47                         break;
  48                 cnt++;
  49         }
  50
  51         if (cnt > 3)
  52                 cnt = 3;
  53
  54         return cnt;
  55 }
  56
  57 static int s2mps11_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
  58                                    unsigned int old_selector,
  59                                    unsigned int new_selector)
  60 {
  61         struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
  62         unsigned int ramp_delay = 0;
  63         int old_volt, new_volt;
  64
  65         switch (rdev->desc->id) {
  66         case S2MPS11_BUCK2:
  67                 ramp_delay = s2mps11->ramp_delay2;
  68                 break;
  69         case S2MPS11_BUCK3:
  70         case S2MPS11_BUCK4:
  71                 ramp_delay = s2mps11->ramp_delay34;
  72                 break;
  73         case S2MPS11_BUCK5:
  74                 ramp_delay = s2mps11->ramp_delay5;
  75                 break;
  76         case S2MPS11_BUCK6:
  77         case S2MPS11_BUCK1:
  78                 ramp_delay = s2mps11->ramp_delay16;
  79                 break;
  80         case S2MPS11_BUCK7:
  81         case S2MPS11_BUCK8:
  82         case S2MPS11_BUCK10:
  83                 ramp_delay = s2mps11->ramp_delay7810;
  84                 break;
  85         case S2MPS11_BUCK9:
  86                 ramp_delay = s2mps11->ramp_delay9;
  87         }
  88
  89         if (ramp_delay == 0)
  90                 ramp_delay = rdev->desc->ramp_delay;
  91
  92         old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector);
  93         new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector);
  94
  95         return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay);
  96 }
  97
  98 static int s2mps11_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
  99 {
 100         struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
 101         unsigned int ramp_val, ramp_shift, ramp_reg = S2MPS11_REG_RAMP_BUCK;
 102         unsigned int ramp_enable = 1, enable_shift = 0;
 103         int ret;
 104
 105         switch (rdev->desc->id) {
 106         case S2MPS11_BUCK1:
 107                 if (ramp_delay > s2mps11->ramp_delay16)
 108                         s2mps11->ramp_delay16 = ramp_delay;
 109                 else
 110                         ramp_delay = s2mps11->ramp_delay16;
 111
 112                 ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT;
 113                 break;
 114         case S2MPS11_BUCK2:
 115                 enable_shift = S2MPS11_BUCK2_RAMP_EN_SHIFT;
 116                 if (!ramp_delay) {
 117                         ramp_enable = 0;
 118                         break;
 119                 }
 120
 121                 s2mps11->ramp_delay2 = ramp_delay;
 122                 ramp_shift = S2MPS11_BUCK2_RAMP_SHIFT;
 123                 ramp_reg = S2MPS11_REG_RAMP;
 124                 break;
 125         case S2MPS11_BUCK3:
 126                 enable_shift = S2MPS11_BUCK3_RAMP_EN_SHIFT;
 127                 if (!ramp_delay) {
 128                         ramp_enable = 0;
 129                         break;
 130                 }
 131
 132                 if (ramp_delay > s2mps11->ramp_delay34)
 133                         s2mps11->ramp_delay34 = ramp_delay;
 134                 else
 135                         ramp_delay = s2mps11->ramp_delay34;
 136
 137                 ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
 138                 ramp_reg = S2MPS11_REG_RAMP;
 139                 break;
 140         case S2MPS11_BUCK4:
 141                 enable_shift = S2MPS11_BUCK4_RAMP_EN_SHIFT;
 142                 if (!ramp_delay) {
 143                         ramp_enable = 0;
 144                         break;
 145                 }
 146
 147                 if (ramp_delay > s2mps11->ramp_delay34)
 148                         s2mps11->ramp_delay34 = ramp_delay;
 149                 else
 150                         ramp_delay = s2mps11->ramp_delay34;
 151
 152                 ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
 153                 ramp_reg = S2MPS11_REG_RAMP;
 154                 break;
 155         case S2MPS11_BUCK5:
 156                 s2mps11->ramp_delay5 = ramp_delay;
 157                 ramp_shift = S2MPS11_BUCK5_RAMP_SHIFT;
 158                 break;
 159         case S2MPS11_BUCK6:
 160                 enable_shift = S2MPS11_BUCK6_RAMP_EN_SHIFT;
 161                 if (!ramp_delay) {
 162                         ramp_enable = 0;
 163                         break;
 164                 }
 165
 166                 if (ramp_delay > s2mps11->ramp_delay16)
 167                         s2mps11->ramp_delay16 = ramp_delay;
 168                 else
 169                         ramp_delay = s2mps11->ramp_delay16;
 170
 171                 ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT;
 172                 break;
 173         case S2MPS11_BUCK7:
 174         case S2MPS11_BUCK8:
 175         case S2MPS11_BUCK10:
 176                 if (ramp_delay > s2mps11->ramp_delay7810)
 177                         s2mps11->ramp_delay7810 = ramp_delay;
 178                 else
 179                         ramp_delay = s2mps11->ramp_delay7810;
 180
 181                 ramp_shift = S2MPS11_BUCK7810_RAMP_SHIFT;
 182                 break;
 183         case S2MPS11_BUCK9:
 184                 s2mps11->ramp_delay9 = ramp_delay;
 185                 ramp_shift = S2MPS11_BUCK9_RAMP_SHIFT;
 186                 break;
 187         default:
 188                 return 0;
 189         }
 190
 191         if (!ramp_enable)
 192                 goto ramp_disable;
 193
 194         if (enable_shift) {
 195                 ret = regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
 196                                         1 << enable_shift, 1 << enable_shift);
 197                 if (ret) {
 198                         dev_err(&rdev->dev, "failed to enable ramp rate\n");
 199                         return ret;
 200                 }
 201         }
 202
 203         ramp_val = get_ramp_delay(ramp_delay);
 204
 205         return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
 206                                   ramp_val << ramp_shift);
 207
 208 ramp_disable:
 209         return regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
 210                                   1 << enable_shift, 0);
 211 }
 212
 213 static struct regulator_ops s2mps11_ldo_ops = {
 214         .list_voltage           = regulator_list_voltage_linear,
 215         .map_voltage            = regulator_map_voltage_linear,
 216         .is_enabled             = regulator_is_enabled_regmap,
 217         .enable                 = regulator_enable_regmap,
 218         .disable                = regulator_disable_regmap,
 219         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 220         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 221         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 222 };
 223
 224 static struct regulator_ops s2mps11_buck_ops = {
 225         .list_voltage           = regulator_list_voltage_linear,
 226         .map_voltage            = regulator_map_voltage_linear,
 227         .is_enabled             = regulator_is_enabled_regmap,
 228         .enable                 = regulator_enable_regmap,
 229         .disable                = regulator_disable_regmap,
 230         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 231         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 232         .set_voltage_time_sel   = s2mps11_regulator_set_voltage_time_sel,
 233         .set_ramp_delay         = s2mps11_set_ramp_delay,
 234 };
 235
 236 #define regulator_desc_ldo1(num)        {               \
 237         .name           = "LDO"#num,                    \
 238         .id             = S2MPS11_LDO##num,             \
 239         .ops            = &s2mps11_ldo_ops,             \
 240         .type           = REGULATOR_VOLTAGE,            \
 241         .owner          = THIS_MODULE,                  \
 242         .min_uV         = S2MPS11_LDO_MIN,              \
 243         .uV_step        = S2MPS11_LDO_STEP1,            \
 244         .n_voltages     = S2MPS11_LDO_N_VOLTAGES,       \
 245         .vsel_reg       = S2MPS11_REG_L1CTRL + num - 1, \
 246         .vsel_mask      = S2MPS11_LDO_VSEL_MASK,        \
 247         .enable_reg     = S2MPS11_REG_L1CTRL + num - 1, \
 248         .enable_mask    = S2MPS11_ENABLE_MASK           \
 249 }
 250 #define regulator_desc_ldo2(num)        {               \
 251         .name           = "LDO"#num,                    \
 252         .id             = S2MPS11_LDO##num,             \
 253         .ops            = &s2mps11_ldo_ops,             \
 254         .type           = REGULATOR_VOLTAGE,            \
 255         .owner          = THIS_MODULE,                  \
 256         .min_uV         = S2MPS11_LDO_MIN,              \
 257         .uV_step        = S2MPS11_LDO_STEP2,            \
 258         .n_voltages     = S2MPS11_LDO_N_VOLTAGES,       \
 259         .vsel_reg       = S2MPS11_REG_L1CTRL + num - 1, \
 260         .vsel_mask      = S2MPS11_LDO_VSEL_MASK,        \
 261         .enable_reg     = S2MPS11_REG_L1CTRL + num - 1, \
 262         .enable_mask    = S2MPS11_ENABLE_MASK           \
 263 }
 264
 265 #define regulator_desc_buck1_4(num)     {                       \
 266         .name           = "BUCK"#num,                           \
 267         .id             = S2MPS11_BUCK##num,                    \
 268         .ops            = &s2mps11_buck_ops,                    \
 269         .type           = REGULATOR_VOLTAGE,                    \
 270         .owner          = THIS_MODULE,                          \
 271         .min_uV         = S2MPS11_BUCK_MIN1,                    \
 272         .uV_step        = S2MPS11_BUCK_STEP1,                   \
 273         .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 274         .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 275         .vsel_reg       = S2MPS11_REG_B1CTRL2 + (num - 1) * 2,  \
 276         .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 277         .enable_reg     = S2MPS11_REG_B1CTRL1 + (num - 1) * 2,  \
 278         .enable_mask    = S2MPS11_ENABLE_MASK                   \
 279 }
 280
 281 #define regulator_desc_buck5    {                               \
 282         .name           = "BUCK5",                              \
 283         .id             = S2MPS11_BUCK5,                        \
 284         .ops            = &s2mps11_buck_ops,                    \
 285         .type           = REGULATOR_VOLTAGE,                    \
 286         .owner          = THIS_MODULE,                          \
 287         .min_uV         = S2MPS11_BUCK_MIN1,                    \
 288         .uV_step        = S2MPS11_BUCK_STEP1,                   \
 289         .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 290         .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 291         .vsel_reg       = S2MPS11_REG_B5CTRL2,                  \
 292         .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 293         .enable_reg     = S2MPS11_REG_B5CTRL1,                  \
 294         .enable_mask    = S2MPS11_ENABLE_MASK                   \
 295 }
 296
 297 #define regulator_desc_buck6_8(num)     {                       \
 298         .name           = "BUCK"#num,                           \
 299         .id             = S2MPS11_BUCK##num,                    \
 300         .ops            = &s2mps11_buck_ops,                    \
 301         .type           = REGULATOR_VOLTAGE,                    \
 302         .owner          = THIS_MODULE,                          \
 303         .min_uV         = S2MPS11_BUCK_MIN1,                    \
 304         .uV_step        = S2MPS11_BUCK_STEP1,                   \
 305         .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 306         .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 307         .vsel_reg       = S2MPS11_REG_B6CTRL2 + (num - 6) * 2,  \
 308         .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 309         .enable_reg     = S2MPS11_REG_B6CTRL1 + (num - 6) * 2,  \
 310         .enable_mask    = S2MPS11_ENABLE_MASK                   \
 311 }
 312
 313 #define regulator_desc_buck9    {                               \
 314         .name           = "BUCK9",                              \
 315         .id             = S2MPS11_BUCK9,                        \
 316         .ops            = &s2mps11_buck_ops,                    \
 317         .type           = REGULATOR_VOLTAGE,                    \
 318         .owner          = THIS_MODULE,                          \
 319         .min_uV         = S2MPS11_BUCK_MIN3,                    \
 320         .uV_step        = S2MPS11_BUCK_STEP3,                   \
 321         .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 322         .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 323         .vsel_reg       = S2MPS11_REG_B9CTRL2,                  \
 324         .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 325         .enable_reg     = S2MPS11_REG_B9CTRL1,                  \
 326         .enable_mask    = S2MPS11_ENABLE_MASK                   \
 327 }
 328
 329 #define regulator_desc_buck10   {                               \
 330         .name           = "BUCK10",                             \
 331         .id             = S2MPS11_BUCK10,                       \
 332         .ops            = &s2mps11_buck_ops,                    \
 333         .type           = REGULATOR_VOLTAGE,                    \
 334         .owner          = THIS_MODULE,                          \
 335         .min_uV         = S2MPS11_BUCK_MIN2,                    \
 336         .uV_step        = S2MPS11_BUCK_STEP2,                   \
 337         .n_voltages     = S2MPS11_BUCK_N_VOLTAGES,              \
 338         .ramp_delay     = S2MPS11_RAMP_DELAY,                   \
 339         .vsel_reg       = S2MPS11_REG_B10CTRL2,                 \
 340         .vsel_mask      = S2MPS11_BUCK_VSEL_MASK,               \
 341         .enable_reg     = S2MPS11_REG_B10CTRL1,                 \
 342         .enable_mask    = S2MPS11_ENABLE_MASK                   \
 343 }
 344
 345 static const struct regulator_desc s2mps11_regulators[] = {
 346         regulator_desc_ldo2(1),
 347         regulator_desc_ldo1(2),
 348         regulator_desc_ldo1(3),
 349         regulator_desc_ldo1(4),
 350         regulator_desc_ldo1(5),
 351         regulator_desc_ldo2(6),
 352         regulator_desc_ldo1(7),
 353         regulator_desc_ldo1(8),
 354         regulator_desc_ldo1(9),
 355         regulator_desc_ldo1(10),
 356         regulator_desc_ldo2(11),
 357         regulator_desc_ldo1(12),
 358         regulator_desc_ldo1(13),
 359         regulator_desc_ldo1(14),
 360         regulator_desc_ldo1(15),
 361         regulator_desc_ldo1(16),
 362         regulator_desc_ldo1(17),
 363         regulator_desc_ldo1(18),
 364         regulator_desc_ldo1(19),
 365         regulator_desc_ldo1(20),
 366         regulator_desc_ldo1(21),
 367         regulator_desc_ldo2(22),
 368         regulator_desc_ldo2(23),
 369         regulator_desc_ldo1(24),
 370         regulator_desc_ldo1(25),
 371         regulator_desc_ldo1(26),
 372         regulator_desc_ldo2(27),
 373         regulator_desc_ldo1(28),
 374         regulator_desc_ldo1(29),
 375         regulator_desc_ldo1(30),
 376         regulator_desc_ldo1(31),
 377         regulator_desc_ldo1(32),
 378         regulator_desc_ldo1(33),
 379         regulator_desc_ldo1(34),
 380         regulator_desc_ldo1(35),
 381         regulator_desc_ldo1(36),
 382         regulator_desc_ldo1(37),
 383         regulator_desc_ldo1(38),
 384         regulator_desc_buck1_4(1),
 385         regulator_desc_buck1_4(2),
 386         regulator_desc_buck1_4(3),
 387         regulator_desc_buck1_4(4),
 388         regulator_desc_buck5,
 389         regulator_desc_buck6_8(6),
 390         regulator_desc_buck6_8(7),
 391         regulator_desc_buck6_8(8),
 392         regulator_desc_buck9,
 393         regulator_desc_buck10,
 394 };
 395
 396 static int s2mps11_pmic_probe(struct platform_device *pdev)
 397 {
 398         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 399         struct sec_platform_data *pdata = iodev->pdata;
 400         struct of_regulator_match *rdata = NULL;
 401         struct device_node *reg_np = NULL;
 402         struct regulator_config config = { };
 403         struct s2mps11_info *s2mps11;
 404         int i, ret = 0;
 405         const struct regulator_desc *regulators;
 406         enum sec_device_type dev_type;
 407
 408         s2mps11 = devm_kzalloc(&pdev->dev, sizeof(struct s2mps11_info),
 409                                 GFP_KERNEL);
 410         if (!s2mps11)
 411                 return -ENOMEM;
 412
 413         dev_type = platform_get_device_id(pdev)->driver_data;
 414         switch (dev_type) {
 415         case S2MPS11X:
 416                 s2mps11->rdev_num = ARRAY_SIZE(s2mps11_regulators);
 417                 regulators = s2mps11_regulators;
 418                 break;
 419         default:
 420                 dev_err(&pdev->dev, "Invalid device type: %u\n", dev_type);
 421                 return -EINVAL;
 422         };
 423
 424         if (!iodev->dev->of_node) {
 425                 if (pdata) {
 426                         goto common_reg;
 427                 } else {
 428                         dev_err(pdev->dev.parent,
 429                                 "Platform data or DT node not supplied\n");
 430                         return -ENODEV;
 431                 }
 432         }
 433
 434         rdata = kzalloc(sizeof(*rdata) * s2mps11->rdev_num, GFP_KERNEL);
 435         if (!rdata)
 436                 return -ENOMEM;
 437
 438         for (i = 0; i < s2mps11->rdev_num; i++)
 439                 rdata[i].name = regulators[i].name;
 440
 441         reg_np = of_find_node_by_name(iodev->dev->of_node, "regulators");
 442         if (!reg_np) {
 443                 dev_err(&pdev->dev, "could not find regulators sub-node\n");
 444                 ret = -EINVAL;
 445                 goto out;
 446         }
 447
 448         of_regulator_match(&pdev->dev, reg_np, rdata, s2mps11->rdev_num);
 449
 450 common_reg:
 451         platform_set_drvdata(pdev, s2mps11);
 452
 453         config.dev = &pdev->dev;
 454         config.regmap = iodev->regmap_pmic;
 455         config.driver_data = s2mps11;
 456         for (i = 0; i < s2mps11->rdev_num; i++) {
 457                 struct regulator_dev *regulator;
 458
 459                 if (!reg_np) {
 460                         config.init_data = pdata->regulators[i].initdata;
 461                         config.of_node = pdata->regulators[i].reg_node;
 462                 } else {
 463                         config.init_data = rdata[i].init_data;
 464                         config.of_node = rdata[i].of_node;
 465                 }
 466
 467                 regulator = devm_regulator_register(&pdev->dev,
 468                                                 &regulators[i], &config);
 469                 if (IS_ERR(regulator)) {
 470                         ret = PTR_ERR(regulator);
 471                         dev_err(&pdev->dev, "regulator init failed for %d\n",
 472                                 i);
 473                         goto out;
 474                 }
 475         }
 476
 477 out:
 478         kfree(rdata);
 479
 480         return ret;
 481 }
 482
 483 static const struct platform_device_id s2mps11_pmic_id[] = {
 484         { "s2mps11-pmic", S2MPS11X},
 485         { },
 486 };
 487 MODULE_DEVICE_TABLE(platform, s2mps11_pmic_id);
 488
 489 static struct platform_driver s2mps11_pmic_driver = {
 490         .driver = {
 491                 .name = "s2mps11-pmic",
 492                 .owner = THIS_MODULE,
 493         },
 494         .probe = s2mps11_pmic_probe,
 495         .id_table = s2mps11_pmic_id,
 496 };
 497
 498 static int __init s2mps11_pmic_init(void)
 499 {
 500         return platform_driver_register(&s2mps11_pmic_driver);
 501 }
 502 subsys_initcall(s2mps11_pmic_init);
 503
 504 static void __exit s2mps11_pmic_exit(void)
 505 {
 506         platform_driver_unregister(&s2mps11_pmic_driver);
 507 }
 508 module_exit(s2mps11_pmic_exit);
 509
 510 /* Module information */
 511 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
 512 MODULE_DESCRIPTION("SAMSUNG S2MPS11 Regulator Driver");
 513 MODULE_LICENSE("GPL");