drivers/regulator/max77802-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // max77802.c - Regulator driver for the Maxim 77802
   4 //
   5 // Copyright (C) 2013-2014 Google, Inc
   6 // Simon Glass <sjg@chromium.org>
   7 //
   8 // Copyright (C) 2012 Samsung Electronics
   9 // Chiwoong Byun <woong.byun@samsung.com>
  10 // Jonghwa Lee <jonghwa3.lee@samsung.com>
  11 //
  12 // This driver is based on max8997.c
  13
  14 #include <linux/kernel.h>
  15 #include <linux/bug.h>
  16 #include <linux/err.h>
  17 #include <linux/gpio.h>
  18 #include <linux/slab.h>
  19 #include <linux/gpio/consumer.h>
  20 #include <linux/module.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/max77686.h>
  26 #include <linux/mfd/max77686-private.h>
  27 #include <dt-bindings/regulator/maxim,max77802.h>
  28
  29 /* Default ramp delay in case it is not manually set */
  30 #define MAX77802_RAMP_DELAY             100000          /* uV/us */
  31
  32 #define MAX77802_OPMODE_SHIFT_LDO       6
  33 #define MAX77802_OPMODE_BUCK234_SHIFT   4
  34 #define MAX77802_OPMODE_MASK            0x3
  35
  36 #define MAX77802_VSEL_MASK              0x3F
  37 #define MAX77802_DVS_VSEL_MASK          0xFF
  38
  39 #define MAX77802_RAMP_RATE_MASK_2BIT    0xC0
  40 #define MAX77802_RAMP_RATE_SHIFT_2BIT   6
  41 #define MAX77802_RAMP_RATE_MASK_4BIT    0xF0
  42 #define MAX77802_RAMP_RATE_SHIFT_4BIT   4
  43
  44 #define MAX77802_STATUS_OFF             0x0
  45 #define MAX77802_OFF_PWRREQ             0x1
  46 #define MAX77802_LP_PWRREQ              0x2
  47
  48 /* MAX77802 has two register formats: 2-bit and 4-bit */
  49 static const unsigned int ramp_table_77802_2bit[] = {
  50         12500,
  51         25000,
  52         50000,
  53         100000,
  54 };
  55
  56 static unsigned int ramp_table_77802_4bit[] = {
  57         1000,   2000,   3030,   4000,
  58         5000,   5880,   7140,   8330,
  59         9090,   10000,  11110,  12500,
  60         16670,  25000,  50000,  100000,
  61 };
  62
  63 struct max77802_regulator_prv {
  64         /* Array indexed by regulator id */
  65         unsigned int opmode[MAX77802_REG_MAX];
  66 };
  67
  68 static inline unsigned int max77802_map_mode(unsigned int mode)
  69 {
  70         return mode == MAX77802_OPMODE_NORMAL ?
  71                 REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY;
  72 }
  73
  74 static int max77802_get_opmode_shift(int id)
  75 {
  76         if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 &&
  77                                      id <= MAX77802_BUCK10))
  78                 return 0;
  79
  80         if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4)
  81                 return MAX77802_OPMODE_BUCK234_SHIFT;
  82
  83         if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35)
  84                 return MAX77802_OPMODE_SHIFT_LDO;
  85
  86         return -EINVAL;
  87 }
  88
  89 /**
  90  * max77802_set_suspend_disable - Disable the regulator during system suspend
  91  * @rdev: regulator to mark as disabled
  92  *
  93  * All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ.
  94  * Configure the regulator so the PMIC will turn it OFF during system suspend.
  95  */
  96 static int max77802_set_suspend_disable(struct regulator_dev *rdev)
  97 {
  98         unsigned int val = MAX77802_OFF_PWRREQ;
  99         struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
 100         int id = rdev_get_id(rdev);
 101         int shift = max77802_get_opmode_shift(id);
 102
 103         max77802->opmode[id] = val;
 104         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 105                                   rdev->desc->enable_mask, val << shift);
 106 }
 107
 108 /*
 109  * Some LDOs support Low Power Mode while the system is running.
 110  *
 111  * LDOs 1, 3, 20, 21.
 112  */
 113 static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode)
 114 {
 115         struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
 116         int id = rdev_get_id(rdev);
 117         unsigned int val;
 118         int shift = max77802_get_opmode_shift(id);
 119
 120         switch (mode) {
 121         case REGULATOR_MODE_STANDBY:
 122                 val = MAX77802_OPMODE_LP;       /* ON in Low Power Mode */
 123                 break;
 124         case REGULATOR_MODE_NORMAL:
 125                 val = MAX77802_OPMODE_NORMAL;   /* ON in Normal Mode */
 126                 break;
 127         default:
 128                 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
 129                          rdev->desc->name, mode);
 130                 return -EINVAL;
 131         }
 132
 133         max77802->opmode[id] = val;
 134         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 135                                   rdev->desc->enable_mask, val << shift);
 136 }
 137
 138 static unsigned max77802_get_mode(struct regulator_dev *rdev)
 139 {
 140         struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
 141         int id = rdev_get_id(rdev);
 142
 143         return max77802_map_mode(max77802->opmode[id]);
 144 }
 145
 146 /**
 147  * max77802_set_suspend_mode - set regulator opmode when the system is suspended
 148  * @rdev: regulator to change mode
 149  * @mode: operating mode to be set
 150  *
 151  * Will set the operating mode for the regulators during system suspend.
 152  * This function is valid for the three different enable control logics:
 153  *
 154  * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35)
 155  * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21)
 156  * Enable Control Logic3 by PWRREQ (LDO 3)
 157  *
 158  * If setting the regulator mode fails, the function only warns but does
 159  * not return an error code to avoid the regulator core to stop setting
 160  * the operating mode for the remaining regulators.
 161  */
 162 static int max77802_set_suspend_mode(struct regulator_dev *rdev,
 163                                      unsigned int mode)
 164 {
 165         struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
 166         int id = rdev_get_id(rdev);
 167         unsigned int val;
 168         int shift = max77802_get_opmode_shift(id);
 169
 170         /*
 171          * If the regulator has been disabled for suspend
 172          * then is invalid to try setting a suspend mode.
 173          */
 174         if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) {
 175                 dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n",
 176                          rdev->desc->name, mode);
 177                 return 0;
 178         }
 179
 180         switch (mode) {
 181         case REGULATOR_MODE_STANDBY:
 182                 /*
 183                  * If the regulator opmode is normal then enable
 184                  * ON in Low Power Mode by PWRREQ. If the mode is
 185                  * already Low Power then no action is required.
 186                  */
 187                 if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL)
 188                         val = MAX77802_LP_PWRREQ;
 189                 else
 190                         return 0;
 191                 break;
 192         case REGULATOR_MODE_NORMAL:
 193                 /*
 194                  * If the regulator operating mode is Low Power then
 195                  * normal is not a valid opmode in suspend. If the
 196                  * mode is already normal then no action is required.
 197                  */
 198                 if (max77802->opmode[id] == MAX77802_OPMODE_LP)
 199                         dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n",
 200                                  rdev->desc->name, mode);
 201                 return 0;
 202         default:
 203                 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
 204                          rdev->desc->name, mode);
 205                 return -EINVAL;
 206         }
 207
 208         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 209                                   rdev->desc->enable_mask, val << shift);
 210 }
 211
 212 static int max77802_enable(struct regulator_dev *rdev)
 213 {
 214         struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
 215         int id = rdev_get_id(rdev);
 216         int shift = max77802_get_opmode_shift(id);
 217
 218         if (max77802->opmode[id] == MAX77802_OFF_PWRREQ)
 219                 max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
 220
 221         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 222                                   rdev->desc->enable_mask,
 223                                   max77802->opmode[id] << shift);
 224 }
 225
 226 static int max77802_find_ramp_value(struct regulator_dev *rdev,
 227                                     const unsigned int limits[], int size,
 228                                     unsigned int ramp_delay)
 229 {
 230         int i;
 231
 232         for (i = 0; i < size; i++) {
 233                 if (ramp_delay <= limits[i])
 234                         return i;
 235         }
 236
 237         /* Use maximum value for no ramp control */
 238         dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n",
 239                  rdev->desc->name, ramp_delay);
 240         return size - 1;
 241 }
 242
 243 /* Used for BUCKs 2-4 */
 244 static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev,
 245                                         int ramp_delay)
 246 {
 247         int id = rdev_get_id(rdev);
 248         unsigned int ramp_value;
 249
 250         if (id > MAX77802_BUCK4) {
 251                 dev_warn(&rdev->dev,
 252                          "%s: regulator: ramp delay not supported\n",
 253                          rdev->desc->name);
 254                 return -EINVAL;
 255         }
 256         ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit,
 257                                 ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay);
 258
 259         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 260                                   MAX77802_RAMP_RATE_MASK_2BIT,
 261                                   ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT);
 262 }
 263
 264 /* For BUCK1, 6 */
 265 static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev,
 266                                             int ramp_delay)
 267 {
 268         unsigned int ramp_value;
 269
 270         ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit,
 271                                 ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay);
 272
 273         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 274                                   MAX77802_RAMP_RATE_MASK_4BIT,
 275                                   ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT);
 276 }
 277
 278 /*
 279  * LDOs 2, 4-19, 22-35
 280  */
 281 static const struct regulator_ops max77802_ldo_ops_logic1 = {
 282         .list_voltage           = regulator_list_voltage_linear,
 283         .map_voltage            = regulator_map_voltage_linear,
 284         .is_enabled             = regulator_is_enabled_regmap,
 285         .enable                 = max77802_enable,
 286         .disable                = regulator_disable_regmap,
 287         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 288         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 289         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 290         .set_suspend_disable    = max77802_set_suspend_disable,
 291         .set_suspend_mode       = max77802_set_suspend_mode,
 292 };
 293
 294 /*
 295  * LDOs 1, 20, 21, 3
 296  */
 297 static const struct regulator_ops max77802_ldo_ops_logic2 = {
 298         .list_voltage           = regulator_list_voltage_linear,
 299         .map_voltage            = regulator_map_voltage_linear,
 300         .is_enabled             = regulator_is_enabled_regmap,
 301         .enable                 = max77802_enable,
 302         .disable                = regulator_disable_regmap,
 303         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 304         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 305         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 306         .set_mode               = max77802_set_mode,
 307         .get_mode               = max77802_get_mode,
 308         .set_suspend_mode       = max77802_set_suspend_mode,
 309 };
 310
 311 /* BUCKS 1, 6 */
 312 static const struct regulator_ops max77802_buck_16_dvs_ops = {
 313         .list_voltage           = regulator_list_voltage_linear,
 314         .map_voltage            = regulator_map_voltage_linear,
 315         .is_enabled             = regulator_is_enabled_regmap,
 316         .enable                 = max77802_enable,
 317         .disable                = regulator_disable_regmap,
 318         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 319         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 320         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 321         .set_ramp_delay         = max77802_set_ramp_delay_4bit,
 322         .set_suspend_disable    = max77802_set_suspend_disable,
 323 };
 324
 325 /* BUCKs 2-4 */
 326 static const struct regulator_ops max77802_buck_234_ops = {
 327         .list_voltage           = regulator_list_voltage_linear,
 328         .map_voltage            = regulator_map_voltage_linear,
 329         .is_enabled             = regulator_is_enabled_regmap,
 330         .enable                 = max77802_enable,
 331         .disable                = regulator_disable_regmap,
 332         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 333         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 334         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 335         .set_ramp_delay         = max77802_set_ramp_delay_2bit,
 336         .set_suspend_disable    = max77802_set_suspend_disable,
 337         .set_suspend_mode       = max77802_set_suspend_mode,
 338 };
 339
 340 /* BUCKs 5, 7-10 */
 341 static const struct regulator_ops max77802_buck_dvs_ops = {
 342         .list_voltage           = regulator_list_voltage_linear,
 343         .map_voltage            = regulator_map_voltage_linear,
 344         .is_enabled             = regulator_is_enabled_regmap,
 345         .enable                 = max77802_enable,
 346         .disable                = regulator_disable_regmap,
 347         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 348         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 349         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 350         .set_ramp_delay         = max77802_set_ramp_delay_2bit,
 351         .set_suspend_disable    = max77802_set_suspend_disable,
 352 };
 353
 354 /* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */
 355 #define regulator_77802_desc_p_ldo(num, supply, log)    {               \
 356         .name           = "LDO"#num,                                    \
 357         .of_match       = of_match_ptr("LDO"#num),                      \
 358         .regulators_node        = of_match_ptr("regulators"),           \
 359         .id             = MAX77802_LDO##num,                            \
 360         .supply_name    = "inl"#supply,                                 \
 361         .ops            = &max77802_ldo_ops_logic##log,                 \
 362         .type           = REGULATOR_VOLTAGE,                            \
 363         .owner          = THIS_MODULE,                                  \
 364         .min_uV         = 800000,                                       \
 365         .uV_step        = 50000,                                        \
 366         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
 367         .n_voltages     = 1 << 6,                                       \
 368         .vsel_reg       = MAX77802_REG_LDO1CTRL1 + num - 1,             \
 369         .vsel_mask      = MAX77802_VSEL_MASK,                           \
 370         .enable_reg     = MAX77802_REG_LDO1CTRL1 + num - 1,             \
 371         .enable_mask    = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
 372         .of_map_mode    = max77802_map_mode,                            \
 373 }
 374
 375 /* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */
 376 #define regulator_77802_desc_n_ldo(num, supply, log)   {                \
 377         .name           = "LDO"#num,                                    \
 378         .of_match       = of_match_ptr("LDO"#num),                      \
 379         .regulators_node        = of_match_ptr("regulators"),           \
 380         .id             = MAX77802_LDO##num,                            \
 381         .supply_name    = "inl"#supply,                                 \
 382         .ops            = &max77802_ldo_ops_logic##log,                 \
 383         .type           = REGULATOR_VOLTAGE,                            \
 384         .owner          = THIS_MODULE,                                  \
 385         .min_uV         = 800000,                                       \
 386         .uV_step        = 25000,                                        \
 387         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
 388         .n_voltages     = 1 << 6,                                       \
 389         .vsel_reg       = MAX77802_REG_LDO1CTRL1 + num - 1,             \
 390         .vsel_mask      = MAX77802_VSEL_MASK,                           \
 391         .enable_reg     = MAX77802_REG_LDO1CTRL1 + num - 1,             \
 392         .enable_mask    = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
 393         .of_map_mode    = max77802_map_mode,                            \
 394 }
 395
 396 /* BUCKs 1, 6 */
 397 #define regulator_77802_desc_16_buck(num)       {               \
 398         .name           = "BUCK"#num,                                   \
 399         .of_match       = of_match_ptr("BUCK"#num),                     \
 400         .regulators_node        = of_match_ptr("regulators"),           \
 401         .id             = MAX77802_BUCK##num,                           \
 402         .supply_name    = "inb"#num,                                    \
 403         .ops            = &max77802_buck_16_dvs_ops,                    \
 404         .type           = REGULATOR_VOLTAGE,                            \
 405         .owner          = THIS_MODULE,                                  \
 406         .min_uV         = 612500,                                       \
 407         .uV_step        = 6250,                                         \
 408         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
 409         .n_voltages     = 1 << 8,                                       \
 410         .vsel_reg       = MAX77802_REG_BUCK ## num ## DVS1,             \
 411         .vsel_mask      = MAX77802_DVS_VSEL_MASK,                       \
 412         .enable_reg     = MAX77802_REG_BUCK ## num ## CTRL,             \
 413         .enable_mask    = MAX77802_OPMODE_MASK,                         \
 414         .of_map_mode    = max77802_map_mode,                            \
 415 }
 416
 417 /* BUCKS 2-4 */
 418 #define regulator_77802_desc_234_buck(num)      {               \
 419         .name           = "BUCK"#num,                                   \
 420         .of_match       = of_match_ptr("BUCK"#num),                     \
 421         .regulators_node        = of_match_ptr("regulators"),           \
 422         .id             = MAX77802_BUCK##num,                           \
 423         .supply_name    = "inb"#num,                                    \
 424         .ops            = &max77802_buck_234_ops,                       \
 425         .type           = REGULATOR_VOLTAGE,                            \
 426         .owner          = THIS_MODULE,                                  \
 427         .min_uV         = 600000,                                       \
 428         .uV_step        = 6250,                                         \
 429         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
 430         .n_voltages     = 0x91,                                         \
 431         .vsel_reg       = MAX77802_REG_BUCK ## num ## DVS1,             \
 432         .vsel_mask      = MAX77802_DVS_VSEL_MASK,                       \
 433         .enable_reg     = MAX77802_REG_BUCK ## num ## CTRL1,            \
 434         .enable_mask    = MAX77802_OPMODE_MASK <<                       \
 435                                 MAX77802_OPMODE_BUCK234_SHIFT,          \
 436         .of_map_mode    = max77802_map_mode,                            \
 437 }
 438
 439 /* BUCK 5 */
 440 #define regulator_77802_desc_buck5(num)         {               \
 441         .name           = "BUCK"#num,                                   \
 442         .of_match       = of_match_ptr("BUCK"#num),                     \
 443         .regulators_node        = of_match_ptr("regulators"),           \
 444         .id             = MAX77802_BUCK##num,                           \
 445         .supply_name    = "inb"#num,                                    \
 446         .ops            = &max77802_buck_dvs_ops,                       \
 447         .type           = REGULATOR_VOLTAGE,                            \
 448         .owner          = THIS_MODULE,                                  \
 449         .min_uV         = 750000,                                       \
 450         .uV_step        = 50000,                                        \
 451         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
 452         .n_voltages     = 1 << 6,                                       \
 453         .vsel_reg       = MAX77802_REG_BUCK5OUT,                        \
 454         .vsel_mask      = MAX77802_VSEL_MASK,                           \
 455         .enable_reg     = MAX77802_REG_BUCK5CTRL,                       \
 456         .enable_mask    = MAX77802_OPMODE_MASK,                         \
 457         .of_map_mode    = max77802_map_mode,                            \
 458 }
 459
 460 /* BUCKs 7-10 */
 461 #define regulator_77802_desc_buck7_10(num)      {               \
 462         .name           = "BUCK"#num,                                   \
 463         .of_match       = of_match_ptr("BUCK"#num),                     \
 464         .regulators_node        = of_match_ptr("regulators"),           \
 465         .id             = MAX77802_BUCK##num,                           \
 466         .supply_name    = "inb"#num,                                    \
 467         .ops            = &max77802_buck_dvs_ops,                       \
 468         .type           = REGULATOR_VOLTAGE,                            \
 469         .owner          = THIS_MODULE,                                  \
 470         .min_uV         = 750000,                                       \
 471         .uV_step        = 50000,                                        \
 472         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
 473         .n_voltages     = 1 << 6,                                       \
 474         .vsel_reg       = MAX77802_REG_BUCK7OUT + (num - 7) * 3,        \
 475         .vsel_mask      = MAX77802_VSEL_MASK,                           \
 476         .enable_reg     = MAX77802_REG_BUCK7CTRL + (num - 7) * 3,       \
 477         .enable_mask    = MAX77802_OPMODE_MASK,                         \
 478         .of_map_mode    = max77802_map_mode,                            \
 479 }
 480
 481 static const struct regulator_desc regulators[] = {
 482         regulator_77802_desc_16_buck(1),
 483         regulator_77802_desc_234_buck(2),
 484         regulator_77802_desc_234_buck(3),
 485         regulator_77802_desc_234_buck(4),
 486         regulator_77802_desc_buck5(5),
 487         regulator_77802_desc_16_buck(6),
 488         regulator_77802_desc_buck7_10(7),
 489         regulator_77802_desc_buck7_10(8),
 490         regulator_77802_desc_buck7_10(9),
 491         regulator_77802_desc_buck7_10(10),
 492         regulator_77802_desc_n_ldo(1, 10, 2),
 493         regulator_77802_desc_n_ldo(2, 10, 1),
 494         regulator_77802_desc_p_ldo(3, 3, 2),
 495         regulator_77802_desc_p_ldo(4, 6, 1),
 496         regulator_77802_desc_p_ldo(5, 3, 1),
 497         regulator_77802_desc_p_ldo(6, 3, 1),
 498         regulator_77802_desc_p_ldo(7, 3, 1),
 499         regulator_77802_desc_n_ldo(8, 1, 1),
 500         regulator_77802_desc_p_ldo(9, 5, 1),
 501         regulator_77802_desc_p_ldo(10, 4, 1),
 502         regulator_77802_desc_p_ldo(11, 4, 1),
 503         regulator_77802_desc_p_ldo(12, 9, 1),
 504         regulator_77802_desc_p_ldo(13, 4, 1),
 505         regulator_77802_desc_p_ldo(14, 4, 1),
 506         regulator_77802_desc_n_ldo(15, 1, 1),
 507         regulator_77802_desc_n_ldo(17, 2, 1),
 508         regulator_77802_desc_p_ldo(18, 7, 1),
 509         regulator_77802_desc_p_ldo(19, 5, 1),
 510         regulator_77802_desc_p_ldo(20, 7, 2),
 511         regulator_77802_desc_p_ldo(21, 6, 2),
 512         regulator_77802_desc_p_ldo(23, 9, 1),
 513         regulator_77802_desc_p_ldo(24, 6, 1),
 514         regulator_77802_desc_p_ldo(25, 9, 1),
 515         regulator_77802_desc_p_ldo(26, 9, 1),
 516         regulator_77802_desc_n_ldo(27, 2, 1),
 517         regulator_77802_desc_p_ldo(28, 7, 1),
 518         regulator_77802_desc_p_ldo(29, 7, 1),
 519         regulator_77802_desc_n_ldo(30, 2, 1),
 520         regulator_77802_desc_p_ldo(32, 9, 1),
 521         regulator_77802_desc_p_ldo(33, 6, 1),
 522         regulator_77802_desc_p_ldo(34, 9, 1),
 523         regulator_77802_desc_n_ldo(35, 2, 1),
 524 };
 525
 526 static int max77802_pmic_probe(struct platform_device *pdev)
 527 {
 528         struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 529         struct max77802_regulator_prv *max77802;
 530         int i, val;
 531         struct regulator_config config = { };
 532
 533         max77802 = devm_kzalloc(&pdev->dev,
 534                                 sizeof(struct max77802_regulator_prv),
 535                                 GFP_KERNEL);
 536         if (!max77802)
 537                 return -ENOMEM;
 538
 539         config.dev = iodev->dev;
 540         config.regmap = iodev->regmap;
 541         config.driver_data = max77802;
 542         platform_set_drvdata(pdev, max77802);
 543
 544         for (i = 0; i < MAX77802_REG_MAX; i++) {
 545                 struct regulator_dev *rdev;
 546                 int id = regulators[i].id;
 547                 int shift = max77802_get_opmode_shift(id);
 548                 int ret;
 549
 550                 ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);
 551                 if (ret < 0) {
 552                         dev_warn(&pdev->dev,
 553                                 "cannot read current mode for %d\n", i);
 554                         val = MAX77802_OPMODE_NORMAL;
 555                 } else {
 556                         val = val >> shift & MAX77802_OPMODE_MASK;
 557                 }
 558
 559                 /*
 560                  * If the regulator is disabled and the system warm rebooted,
 561                  * the hardware reports OFF as the regulator operating mode.
 562                  * Default to operating mode NORMAL in that case.
 563                  */
 564                 if (val == MAX77802_STATUS_OFF)
 565                         max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
 566                 else
 567                         max77802->opmode[id] = val;
 568
 569                 rdev = devm_regulator_register(&pdev->dev,
 570                                                &regulators[i], &config);
 571                 if (IS_ERR(rdev)) {
 572                         ret = PTR_ERR(rdev);
 573                         dev_err(&pdev->dev,
 574                                 "regulator init failed for %d: %d\n", i, ret);
 575                         return ret;
 576                 }
 577         }
 578
 579         return 0;
 580 }
 581
 582 static const struct platform_device_id max77802_pmic_id[] = {
 583         {"max77802-pmic", 0},
 584         { },
 585 };
 586 MODULE_DEVICE_TABLE(platform, max77802_pmic_id);
 587
 588 static struct platform_driver max77802_pmic_driver = {
 589         .driver = {
 590                 .name = "max77802-pmic",
 591         },
 592         .probe = max77802_pmic_probe,
 593         .id_table = max77802_pmic_id,
 594 };
 595
 596 module_platform_driver(max77802_pmic_driver);
 597
 598 MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver");
 599 MODULE_AUTHOR("Simon Glass <sjg@chromium.org>");
 600 MODULE_LICENSE("GPL");