kernel/drivers/regulator/max77802.c

   1 /*
   2  * max77802.c - Regulator driver for the Maxim 77802
   3  *
   4  * Copyright (C) 2013-2014 Google, Inc
   5  * Simon Glass <sjg@chromium.org>
   6  *
   7  * Copyright (C) 2012 Samsung Electronics
   8  * Chiwoong Byun <woong.byun@smasung.com>
   9  * Jonghwa Lee <jonghwa3.lee@samsung.com>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * This driver is based on max8997.c
  22  */
  23
  24 #include <linux/kernel.h>
  25 #include <linux/bug.h>
  26 #include <linux/err.h>
  27 #include <linux/gpio.h>
  28 #include <linux/slab.h>
  29 #include <linux/gpio/consumer.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/regulator/driver.h>
  32 #include <linux/regulator/machine.h>
  33 #include <linux/regulator/of_regulator.h>
  34 #include <linux/mfd/max77686.h>
  35 #include <linux/mfd/max77686-private.h>
  36 #include <dt-bindings/regulator/maxim,max77802.h>
  37
  38 /* Default ramp delay in case it is not manually set */
  39 #define MAX77802_RAMP_DELAY             100000          /* uV/us */
  40
  41 #define MAX77802_OPMODE_SHIFT_LDO       6
  42 #define MAX77802_OPMODE_BUCK234_SHIFT   4
  43 #define MAX77802_OPMODE_MASK            0x3
  44
  45 #define MAX77802_VSEL_MASK              0x3F
  46 #define MAX77802_DVS_VSEL_MASK          0xFF
  47
  48 #define MAX77802_RAMP_RATE_MASK_2BIT    0xC0
  49 #define MAX77802_RAMP_RATE_SHIFT_2BIT   6
  50 #define MAX77802_RAMP_RATE_MASK_4BIT    0xF0
  51 #define MAX77802_RAMP_RATE_SHIFT_4BIT   4
  52
  53 #define MAX77802_STATUS_OFF             0x0
  54 #define MAX77802_OFF_PWRREQ             0x1
  55 #define MAX77802_LP_PWRREQ              0x2
  56
  57 /* MAX77802 has two register formats: 2-bit and 4-bit */
  58 static const unsigned int ramp_table_77802_2bit[] = {
  59         12500,
  60         25000,
  61         50000,
  62         100000,
  63 };
  64
  65 static unsigned int ramp_table_77802_4bit[] = {
  66         1000,   2000,   3030,   4000,
  67         5000,   5880,   7140,   8330,
  68         9090,   10000,  11110,  12500,
  69         16670,  25000,  50000,  100000,
  70 };
  71
  72 struct max77802_regulator_prv {
  73         /* Array indexed by regulator id */
  74         unsigned int opmode[MAX77802_REG_MAX];
  75 };
  76
  77 static inline unsigned int max77802_map_mode(unsigned int mode)
  78 {
  79         return mode == MAX77802_OPMODE_NORMAL ?
  80                 REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY;
  81 }
  82
  83 static int max77802_get_opmode_shift(int id)
  84 {
  85         if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 &&
  86                                      id <= MAX77802_BUCK10))
  87                 return 0;
  88
  89         if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4)
  90                 return MAX77802_OPMODE_BUCK234_SHIFT;
  91
  92         if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35)
  93                 return MAX77802_OPMODE_SHIFT_LDO;
  94
  95         return -EINVAL;
  96 }
  97
  98 /**
  99  * max77802_set_suspend_disable - Disable the regulator during system suspend
 100  * @rdev: regulator to mark as disabled
 101  *
 102  * All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ.
 103  * Configure the regulator so the PMIC will turn it OFF during system suspend.
 104  */
 105 static int max77802_set_suspend_disable(struct regulator_dev *rdev)
 106 {
 107         unsigned int val = MAX77802_OFF_PWRREQ;
 108         struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
 109         int id = rdev_get_id(rdev);
 110         int shift = max77802_get_opmode_shift(id);
 111
 112         max77802->opmode[id] = val;
 113         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 114                                   rdev->desc->enable_mask, val << shift);
 115 }
 116
 117 /*
 118  * Some LDOs support Low Power Mode while the system is running.
 119  *
 120  * LDOs 1, 3, 20, 21.
 121  */
 122 static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode)
 123 {
 124         struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
 125         int id = rdev_get_id(rdev);
 126         unsigned int val;
 127         int shift = max77802_get_opmode_shift(id);
 128
 129         switch (mode) {
 130         case REGULATOR_MODE_STANDBY:
 131                 val = MAX77802_OPMODE_LP;       /* ON in Low Power Mode */
 132                 break;
 133         case REGULATOR_MODE_NORMAL:
 134                 val = MAX77802_OPMODE_NORMAL;   /* ON in Normal Mode */
 135                 break;
 136         default:
 137                 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
 138                          rdev->desc->name, mode);
 139                 return -EINVAL;
 140         }
 141
 142         max77802->opmode[id] = val;
 143         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 144                                   rdev->desc->enable_mask, val << shift);
 145 }
 146
 147 static unsigned max77802_get_mode(struct regulator_dev *rdev)
 148 {
 149         struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
 150         int id = rdev_get_id(rdev);
 151
 152         return max77802_map_mode(max77802->opmode[id]);
 153 }
 154
 155 /**
 156  * max77802_set_suspend_mode - set regulator opmode when the system is suspended
 157  * @rdev: regulator to change mode
 158  * @mode: operating mode to be set
 159  *
 160  * Will set the operating mode for the regulators during system suspend.
 161  * This function is valid for the three different enable control logics:
 162  *
 163  * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35)
 164  * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21)
 165  * Enable Control Logic3 by PWRREQ (LDO 3)
 166  *
 167  * If setting the regulator mode fails, the function only warns but does
 168  * not return an error code to avoid the regulator core to stop setting
 169  * the operating mode for the remaining regulators.
 170  */
 171 static int max77802_set_suspend_mode(struct regulator_dev *rdev,
 172                                      unsigned int mode)
 173 {
 174         struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
 175         int id = rdev_get_id(rdev);
 176         unsigned int val;
 177         int shift = max77802_get_opmode_shift(id);
 178
 179         /*
 180          * If the regulator has been disabled for suspend
 181          * then is invalid to try setting a suspend mode.
 182          */
 183         if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) {
 184                 dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n",
 185                          rdev->desc->name, mode);
 186                 return 0;
 187         }
 188
 189         switch (mode) {
 190         case REGULATOR_MODE_STANDBY:
 191                 /*
 192                  * If the regulator opmode is normal then enable
 193                  * ON in Low Power Mode by PWRREQ. If the mode is
 194                  * already Low Power then no action is required.
 195                  */
 196                 if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL)
 197                         val = MAX77802_LP_PWRREQ;
 198                 else
 199                         return 0;
 200                 break;
 201         case REGULATOR_MODE_NORMAL:
 202                 /*
 203                  * If the regulator operating mode is Low Power then
 204                  * normal is not a valid opmode in suspend. If the
 205                  * mode is already normal then no action is required.
 206                  */
 207                 if (max77802->opmode[id] == MAX77802_OPMODE_LP)
 208                         dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n",
 209                                  rdev->desc->name, mode);
 210                 return 0;
 211         default:
 212                 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
 213                          rdev->desc->name, mode);
 214                 return -EINVAL;
 215         }
 216
 217         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 218                                   rdev->desc->enable_mask, val << shift);
 219 }
 220
 221 static int max77802_enable(struct regulator_dev *rdev)
 222 {
 223         struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
 224         int id = rdev_get_id(rdev);
 225         int shift = max77802_get_opmode_shift(id);
 226
 227         if (max77802->opmode[id] == MAX77802_OFF_PWRREQ)
 228                 max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
 229
 230         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 231                                   rdev->desc->enable_mask,
 232                                   max77802->opmode[id] << shift);
 233 }
 234
 235 static int max77802_find_ramp_value(struct regulator_dev *rdev,
 236                                     const unsigned int limits[], int size,
 237                                     unsigned int ramp_delay)
 238 {
 239         int i;
 240
 241         for (i = 0; i < size; i++) {
 242                 if (ramp_delay <= limits[i])
 243                         return i;
 244         }
 245
 246         /* Use maximum value for no ramp control */
 247         dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n",
 248                  rdev->desc->name, ramp_delay);
 249         return size - 1;
 250 }
 251
 252 /* Used for BUCKs 2-4 */
 253 static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev,
 254                                         int ramp_delay)
 255 {
 256         int id = rdev_get_id(rdev);
 257         unsigned int ramp_value;
 258
 259         if (id > MAX77802_BUCK4) {
 260                         dev_warn(&rdev->dev,
 261                                  "%s: regulator: ramp delay not supported\n",
 262                                  rdev->desc->name);
 263                 return -EINVAL;
 264         }
 265         ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit,
 266                                 ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay);
 267
 268         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 269                                   MAX77802_RAMP_RATE_MASK_2BIT,
 270                                   ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT);
 271 }
 272
 273 /* For BUCK1, 6 */
 274 static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev,
 275                                             int ramp_delay)
 276 {
 277         unsigned int ramp_value;
 278
 279         ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit,
 280                                 ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay);
 281
 282         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 283                                   MAX77802_RAMP_RATE_MASK_4BIT,
 284                                   ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT);
 285 }
 286
 287 /*
 288  * LDOs 2, 4-19, 22-35
 289  */
 290 static struct regulator_ops max77802_ldo_ops_logic1 = {
 291         .list_voltage           = regulator_list_voltage_linear,
 292         .map_voltage            = regulator_map_voltage_linear,
 293         .is_enabled             = regulator_is_enabled_regmap,
 294         .enable                 = max77802_enable,
 295         .disable                = regulator_disable_regmap,
 296         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 297         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 298         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 299         .set_suspend_disable    = max77802_set_suspend_disable,
 300         .set_suspend_mode       = max77802_set_suspend_mode,
 301 };
 302
 303 /*
 304  * LDOs 1, 20, 21, 3
 305  */
 306 static struct regulator_ops max77802_ldo_ops_logic2 = {
 307         .list_voltage           = regulator_list_voltage_linear,
 308         .map_voltage            = regulator_map_voltage_linear,
 309         .is_enabled             = regulator_is_enabled_regmap,
 310         .enable                 = max77802_enable,
 311         .disable                = regulator_disable_regmap,
 312         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 313         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 314         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 315         .set_mode               = max77802_set_mode,
 316         .get_mode               = max77802_get_mode,
 317         .set_suspend_mode       = max77802_set_suspend_mode,
 318 };
 319
 320 /* BUCKS 1, 6 */
 321 static struct regulator_ops max77802_buck_16_dvs_ops = {
 322         .list_voltage           = regulator_list_voltage_linear,
 323         .map_voltage            = regulator_map_voltage_linear,
 324         .is_enabled             = regulator_is_enabled_regmap,
 325         .enable                 = max77802_enable,
 326         .disable                = regulator_disable_regmap,
 327         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 328         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 329         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 330         .set_ramp_delay         = max77802_set_ramp_delay_4bit,
 331         .set_suspend_disable    = max77802_set_suspend_disable,
 332 };
 333
 334 /* BUCKs 2-4 */
 335 static struct regulator_ops max77802_buck_234_ops = {
 336         .list_voltage           = regulator_list_voltage_linear,
 337         .map_voltage            = regulator_map_voltage_linear,
 338         .is_enabled             = regulator_is_enabled_regmap,
 339         .enable                 = max77802_enable,
 340         .disable                = regulator_disable_regmap,
 341         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 342         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 343         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 344         .set_ramp_delay         = max77802_set_ramp_delay_2bit,
 345         .set_suspend_disable    = max77802_set_suspend_disable,
 346         .set_suspend_mode       = max77802_set_suspend_mode,
 347 };
 348
 349 /* BUCKs 5, 7-10 */
 350 static struct regulator_ops max77802_buck_dvs_ops = {
 351         .list_voltage           = regulator_list_voltage_linear,
 352         .map_voltage            = regulator_map_voltage_linear,
 353         .is_enabled             = regulator_is_enabled_regmap,
 354         .enable                 = max77802_enable,
 355         .disable                = regulator_disable_regmap,
 356         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 357         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 358         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 359         .set_ramp_delay         = max77802_set_ramp_delay_2bit,
 360         .set_suspend_disable    = max77802_set_suspend_disable,
 361 };
 362
 363 /* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */
 364 #define regulator_77802_desc_p_ldo(num, supply, log)    {               \
 365         .name           = "LDO"#num,                                    \
 366         .of_match       = of_match_ptr("LDO"#num),                      \
 367         .regulators_node        = of_match_ptr("regulators"),           \
 368         .id             = MAX77802_LDO##num,                            \
 369         .supply_name    = "inl"#supply,                                 \
 370         .ops            = &max77802_ldo_ops_logic##log,                 \
 371         .type           = REGULATOR_VOLTAGE,                            \
 372         .owner          = THIS_MODULE,                                  \
 373         .min_uV         = 800000,                                       \
 374         .uV_step        = 50000,                                        \
 375         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
 376         .n_voltages     = 1 << 6,                                       \
 377         .vsel_reg       = MAX77802_REG_LDO1CTRL1 + num - 1,             \
 378         .vsel_mask      = MAX77802_VSEL_MASK,                           \
 379         .enable_reg     = MAX77802_REG_LDO1CTRL1 + num - 1,             \
 380         .enable_mask    = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
 381         .of_map_mode    = max77802_map_mode,                            \
 382 }
 383
 384 /* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */
 385 #define regulator_77802_desc_n_ldo(num, supply, log)   {                \
 386         .name           = "LDO"#num,                                    \
 387         .of_match       = of_match_ptr("LDO"#num),                      \
 388         .regulators_node        = of_match_ptr("regulators"),           \
 389         .id             = MAX77802_LDO##num,                            \
 390         .supply_name    = "inl"#supply,                                 \
 391         .ops            = &max77802_ldo_ops_logic##log,                 \
 392         .type           = REGULATOR_VOLTAGE,                            \
 393         .owner          = THIS_MODULE,                                  \
 394         .min_uV         = 800000,                                       \
 395         .uV_step        = 25000,                                        \
 396         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
 397         .n_voltages     = 1 << 6,                                       \
 398         .vsel_reg       = MAX77802_REG_LDO1CTRL1 + num - 1,             \
 399         .vsel_mask      = MAX77802_VSEL_MASK,                           \
 400         .enable_reg     = MAX77802_REG_LDO1CTRL1 + num - 1,             \
 401         .enable_mask    = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
 402         .of_map_mode    = max77802_map_mode,                            \
 403 }
 404
 405 /* BUCKs 1, 6 */
 406 #define regulator_77802_desc_16_buck(num)       {               \
 407         .name           = "BUCK"#num,                                   \
 408         .of_match       = of_match_ptr("BUCK"#num),                     \
 409         .regulators_node        = of_match_ptr("regulators"),           \
 410         .id             = MAX77802_BUCK##num,                           \
 411         .supply_name    = "inb"#num,                                    \
 412         .ops            = &max77802_buck_16_dvs_ops,                    \
 413         .type           = REGULATOR_VOLTAGE,                            \
 414         .owner          = THIS_MODULE,                                  \
 415         .min_uV         = 612500,                                       \
 416         .uV_step        = 6250,                                         \
 417         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
 418         .n_voltages     = 1 << 8,                                       \
 419         .vsel_reg       = MAX77802_REG_BUCK ## num ## DVS1,             \
 420         .vsel_mask      = MAX77802_DVS_VSEL_MASK,                       \
 421         .enable_reg     = MAX77802_REG_BUCK ## num ## CTRL,             \
 422         .enable_mask    = MAX77802_OPMODE_MASK,                         \
 423         .of_map_mode    = max77802_map_mode,                            \
 424 }
 425
 426 /* BUCKS 2-4 */
 427 #define regulator_77802_desc_234_buck(num)      {               \
 428         .name           = "BUCK"#num,                                   \
 429         .of_match       = of_match_ptr("BUCK"#num),                     \
 430         .regulators_node        = of_match_ptr("regulators"),           \
 431         .id             = MAX77802_BUCK##num,                           \
 432         .supply_name    = "inb"#num,                                    \
 433         .ops            = &max77802_buck_234_ops,                       \
 434         .type           = REGULATOR_VOLTAGE,                            \
 435         .owner          = THIS_MODULE,                                  \
 436         .min_uV         = 600000,                                       \
 437         .uV_step        = 6250,                                         \
 438         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
 439         .n_voltages     = 0x91,                                         \
 440         .vsel_reg       = MAX77802_REG_BUCK ## num ## DVS1,             \
 441         .vsel_mask      = MAX77802_DVS_VSEL_MASK,                       \
 442         .enable_reg     = MAX77802_REG_BUCK ## num ## CTRL1,            \
 443         .enable_mask    = MAX77802_OPMODE_MASK <<                       \
 444                                 MAX77802_OPMODE_BUCK234_SHIFT,          \
 445         .of_map_mode    = max77802_map_mode,                            \
 446 }
 447
 448 /* BUCK 5 */
 449 #define regulator_77802_desc_buck5(num)         {               \
 450         .name           = "BUCK"#num,                                   \
 451         .of_match       = of_match_ptr("BUCK"#num),                     \
 452         .regulators_node        = of_match_ptr("regulators"),           \
 453         .id             = MAX77802_BUCK##num,                           \
 454         .supply_name    = "inb"#num,                                    \
 455         .ops            = &max77802_buck_dvs_ops,                       \
 456         .type           = REGULATOR_VOLTAGE,                            \
 457         .owner          = THIS_MODULE,                                  \
 458         .min_uV         = 750000,                                       \
 459         .uV_step        = 50000,                                        \
 460         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
 461         .n_voltages     = 1 << 6,                                       \
 462         .vsel_reg       = MAX77802_REG_BUCK5OUT,                        \
 463         .vsel_mask      = MAX77802_VSEL_MASK,                           \
 464         .enable_reg     = MAX77802_REG_BUCK5CTRL,                       \
 465         .enable_mask    = MAX77802_OPMODE_MASK,                         \
 466         .of_map_mode    = max77802_map_mode,                            \
 467 }
 468
 469 /* BUCKs 7-10 */
 470 #define regulator_77802_desc_buck7_10(num)      {               \
 471         .name           = "BUCK"#num,                                   \
 472         .of_match       = of_match_ptr("BUCK"#num),                     \
 473         .regulators_node        = of_match_ptr("regulators"),           \
 474         .id             = MAX77802_BUCK##num,                           \
 475         .supply_name    = "inb"#num,                                    \
 476         .ops            = &max77802_buck_dvs_ops,                       \
 477         .type           = REGULATOR_VOLTAGE,                            \
 478         .owner          = THIS_MODULE,                                  \
 479         .min_uV         = 750000,                                       \
 480         .uV_step        = 50000,                                        \
 481         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
 482         .n_voltages     = 1 << 6,                                       \
 483         .vsel_reg       = MAX77802_REG_BUCK7OUT + (num - 7) * 3,        \
 484         .vsel_mask      = MAX77802_VSEL_MASK,                           \
 485         .enable_reg     = MAX77802_REG_BUCK7CTRL + (num - 7) * 3,       \
 486         .enable_mask    = MAX77802_OPMODE_MASK,                         \
 487         .of_map_mode    = max77802_map_mode,                            \
 488 }
 489
 490 static const struct regulator_desc regulators[] = {
 491         regulator_77802_desc_16_buck(1),
 492         regulator_77802_desc_234_buck(2),
 493         regulator_77802_desc_234_buck(3),
 494         regulator_77802_desc_234_buck(4),
 495         regulator_77802_desc_buck5(5),
 496         regulator_77802_desc_16_buck(6),
 497         regulator_77802_desc_buck7_10(7),
 498         regulator_77802_desc_buck7_10(8),
 499         regulator_77802_desc_buck7_10(9),
 500         regulator_77802_desc_buck7_10(10),
 501         regulator_77802_desc_n_ldo(1, 10, 2),
 502         regulator_77802_desc_n_ldo(2, 10, 1),
 503         regulator_77802_desc_p_ldo(3, 3, 2),
 504         regulator_77802_desc_p_ldo(4, 6, 1),
 505         regulator_77802_desc_p_ldo(5, 3, 1),
 506         regulator_77802_desc_p_ldo(6, 3, 1),
 507         regulator_77802_desc_p_ldo(7, 3, 1),
 508         regulator_77802_desc_n_ldo(8, 1, 1),
 509         regulator_77802_desc_p_ldo(9, 5, 1),
 510         regulator_77802_desc_p_ldo(10, 4, 1),
 511         regulator_77802_desc_p_ldo(11, 4, 1),
 512         regulator_77802_desc_p_ldo(12, 9, 1),
 513         regulator_77802_desc_p_ldo(13, 4, 1),
 514         regulator_77802_desc_p_ldo(14, 4, 1),
 515         regulator_77802_desc_n_ldo(15, 1, 1),
 516         regulator_77802_desc_n_ldo(17, 2, 1),
 517         regulator_77802_desc_p_ldo(18, 7, 1),
 518         regulator_77802_desc_p_ldo(19, 5, 1),
 519         regulator_77802_desc_p_ldo(20, 7, 2),
 520         regulator_77802_desc_p_ldo(21, 6, 2),
 521         regulator_77802_desc_p_ldo(23, 9, 1),
 522         regulator_77802_desc_p_ldo(24, 6, 1),
 523         regulator_77802_desc_p_ldo(25, 9, 1),
 524         regulator_77802_desc_p_ldo(26, 9, 1),
 525         regulator_77802_desc_n_ldo(27, 2, 1),
 526         regulator_77802_desc_p_ldo(28, 7, 1),
 527         regulator_77802_desc_p_ldo(29, 7, 1),
 528         regulator_77802_desc_n_ldo(30, 2, 1),
 529         regulator_77802_desc_p_ldo(32, 9, 1),
 530         regulator_77802_desc_p_ldo(33, 6, 1),
 531         regulator_77802_desc_p_ldo(34, 9, 1),
 532         regulator_77802_desc_n_ldo(35, 2, 1),
 533 };
 534
 535 static int max77802_pmic_probe(struct platform_device *pdev)
 536 {
 537         struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 538         struct max77802_regulator_prv *max77802;
 539         int i, val;
 540         struct regulator_config config = { };
 541
 542         max77802 = devm_kzalloc(&pdev->dev,
 543                                 sizeof(struct max77802_regulator_prv),
 544                                 GFP_KERNEL);
 545         if (!max77802)
 546                 return -ENOMEM;
 547
 548         config.dev = iodev->dev;
 549         config.regmap = iodev->regmap;
 550         config.driver_data = max77802;
 551         platform_set_drvdata(pdev, max77802);
 552
 553         for (i = 0; i < MAX77802_REG_MAX; i++) {
 554                 struct regulator_dev *rdev;
 555                 int id = regulators[i].id;
 556                 int shift = max77802_get_opmode_shift(id);
 557                 int ret;
 558
 559                 ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);
 560                 if (ret < 0) {
 561                         dev_warn(&pdev->dev,
 562                                 "cannot read current mode for %d\n", i);
 563                         val = MAX77802_OPMODE_NORMAL;
 564                 } else {
 565                         val = val >> shift & MAX77802_OPMODE_MASK;
 566                 }
 567
 568                 /*
 569                  * If the regulator is disabled and the system warm rebooted,
 570                  * the hardware reports OFF as the regulator operating mode.
 571                  * Default to operating mode NORMAL in that case.
 572                  */
 573                 if (val == MAX77802_STATUS_OFF)
 574                         max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
 575                 else
 576                         max77802->opmode[id] = val;
 577
 578                 rdev = devm_regulator_register(&pdev->dev,
 579                                                &regulators[i], &config);
 580                 if (IS_ERR(rdev)) {
 581                         ret = PTR_ERR(rdev);
 582                         dev_err(&pdev->dev,
 583                                 "regulator init failed for %d: %d\n", i, ret);
 584                         return ret;
 585                 }
 586         }
 587
 588         return 0;
 589 }
 590
 591 static const struct platform_device_id max77802_pmic_id[] = {
 592         {"max77802-pmic", 0},
 593         { },
 594 };
 595 MODULE_DEVICE_TABLE(platform, max77802_pmic_id);
 596
 597 static struct platform_driver max77802_pmic_driver = {
 598         .driver = {
 599                 .name = "max77802-pmic",
 600         },
 601         .probe = max77802_pmic_probe,
 602         .id_table = max77802_pmic_id,
 603 };
 604
 605 module_platform_driver(max77802_pmic_driver);
 606
 607 MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver");
 608 MODULE_AUTHOR("Simon Glass <sjg@chromium.org>");
 609 MODULE_LICENSE("GPL");