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