drivers/regulator/qcom_spmi-regulator.c

   1 /*
   2  * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 and
   6  * only version 2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/delay.h>
  16 #include <linux/err.h>
  17 #include <linux/kernel.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/bitops.h>
  20 #include <linux/slab.h>
  21 #include <linux/of.h>
  22 #include <linux/of_device.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/ktime.h>
  25 #include <linux/regulator/driver.h>
  26 #include <linux/regmap.h>
  27 #include <linux/list.h>
  28
  29 /* Pin control enable input pins. */
  30 #define SPMI_REGULATOR_PIN_CTRL_ENABLE_NONE             0x00
  31 #define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN0              0x01
  32 #define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN1              0x02
  33 #define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN2              0x04
  34 #define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN3              0x08
  35 #define SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT       0x10
  36
  37 /* Pin control high power mode input pins. */
  38 #define SPMI_REGULATOR_PIN_CTRL_HPM_NONE                0x00
  39 #define SPMI_REGULATOR_PIN_CTRL_HPM_EN0                 0x01
  40 #define SPMI_REGULATOR_PIN_CTRL_HPM_EN1                 0x02
  41 #define SPMI_REGULATOR_PIN_CTRL_HPM_EN2                 0x04
  42 #define SPMI_REGULATOR_PIN_CTRL_HPM_EN3                 0x08
  43 #define SPMI_REGULATOR_PIN_CTRL_HPM_SLEEP_B             0x10
  44 #define SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT          0x20
  45
  46 /*
  47  * Used with enable parameters to specify that hardware default register values
  48  * should be left unaltered.
  49  */
  50 #define SPMI_REGULATOR_USE_HW_DEFAULT                   2
  51
  52 /* Soft start strength of a voltage switch type regulator */
  53 enum spmi_vs_soft_start_str {
  54         SPMI_VS_SOFT_START_STR_0P05_UA = 0,
  55         SPMI_VS_SOFT_START_STR_0P25_UA,
  56         SPMI_VS_SOFT_START_STR_0P55_UA,
  57         SPMI_VS_SOFT_START_STR_0P75_UA,
  58         SPMI_VS_SOFT_START_STR_HW_DEFAULT,
  59 };
  60
  61 /**
  62  * struct spmi_regulator_init_data - spmi-regulator initialization data
  63  * @pin_ctrl_enable:        Bit mask specifying which hardware pins should be
  64  *                              used to enable the regulator, if any
  65  *                          Value should be an ORing of
  66  *                              SPMI_REGULATOR_PIN_CTRL_ENABLE_* constants.  If
  67  *                              the bit specified by
  68  *                              SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT is
  69  *                              set, then pin control enable hardware registers
  70  *                              will not be modified.
  71  * @pin_ctrl_hpm:           Bit mask specifying which hardware pins should be
  72  *                              used to force the regulator into high power
  73  *                              mode, if any
  74  *                          Value should be an ORing of
  75  *                              SPMI_REGULATOR_PIN_CTRL_HPM_* constants.  If
  76  *                              the bit specified by
  77  *                              SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT is
  78  *                              set, then pin control mode hardware registers
  79  *                              will not be modified.
  80  * @vs_soft_start_strength: This parameter sets the soft start strength for
  81  *                              voltage switch type regulators.  Its value
  82  *                              should be one of SPMI_VS_SOFT_START_STR_*.  If
  83  *                              its value is SPMI_VS_SOFT_START_STR_HW_DEFAULT,
  84  *                              then the soft start strength will be left at its
  85  *                              default hardware value.
  86  */
  87 struct spmi_regulator_init_data {
  88         unsigned                                pin_ctrl_enable;
  89         unsigned                                pin_ctrl_hpm;
  90         enum spmi_vs_soft_start_str             vs_soft_start_strength;
  91 };
  92
  93 /* These types correspond to unique register layouts. */
  94 enum spmi_regulator_logical_type {
  95         SPMI_REGULATOR_LOGICAL_TYPE_SMPS,
  96         SPMI_REGULATOR_LOGICAL_TYPE_LDO,
  97         SPMI_REGULATOR_LOGICAL_TYPE_VS,
  98         SPMI_REGULATOR_LOGICAL_TYPE_BOOST,
  99         SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS,
 100         SPMI_REGULATOR_LOGICAL_TYPE_BOOST_BYP,
 101         SPMI_REGULATOR_LOGICAL_TYPE_LN_LDO,
 102         SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS,
 103         SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS,
 104         SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO,
 105 };
 106
 107 enum spmi_regulator_type {
 108         SPMI_REGULATOR_TYPE_BUCK                = 0x03,
 109         SPMI_REGULATOR_TYPE_LDO                 = 0x04,
 110         SPMI_REGULATOR_TYPE_VS                  = 0x05,
 111         SPMI_REGULATOR_TYPE_BOOST               = 0x1b,
 112         SPMI_REGULATOR_TYPE_FTS                 = 0x1c,
 113         SPMI_REGULATOR_TYPE_BOOST_BYP           = 0x1f,
 114         SPMI_REGULATOR_TYPE_ULT_LDO             = 0x21,
 115         SPMI_REGULATOR_TYPE_ULT_BUCK            = 0x22,
 116 };
 117
 118 enum spmi_regulator_subtype {
 119         SPMI_REGULATOR_SUBTYPE_GP_CTL           = 0x08,
 120         SPMI_REGULATOR_SUBTYPE_RF_CTL           = 0x09,
 121         SPMI_REGULATOR_SUBTYPE_N50              = 0x01,
 122         SPMI_REGULATOR_SUBTYPE_N150             = 0x02,
 123         SPMI_REGULATOR_SUBTYPE_N300             = 0x03,
 124         SPMI_REGULATOR_SUBTYPE_N600             = 0x04,
 125         SPMI_REGULATOR_SUBTYPE_N1200            = 0x05,
 126         SPMI_REGULATOR_SUBTYPE_N600_ST          = 0x06,
 127         SPMI_REGULATOR_SUBTYPE_N1200_ST         = 0x07,
 128         SPMI_REGULATOR_SUBTYPE_N900_ST          = 0x14,
 129         SPMI_REGULATOR_SUBTYPE_N300_ST          = 0x15,
 130         SPMI_REGULATOR_SUBTYPE_P50              = 0x08,
 131         SPMI_REGULATOR_SUBTYPE_P150             = 0x09,
 132         SPMI_REGULATOR_SUBTYPE_P300             = 0x0a,
 133         SPMI_REGULATOR_SUBTYPE_P600             = 0x0b,
 134         SPMI_REGULATOR_SUBTYPE_P1200            = 0x0c,
 135         SPMI_REGULATOR_SUBTYPE_LN               = 0x10,
 136         SPMI_REGULATOR_SUBTYPE_LV_P50           = 0x28,
 137         SPMI_REGULATOR_SUBTYPE_LV_P150          = 0x29,
 138         SPMI_REGULATOR_SUBTYPE_LV_P300          = 0x2a,
 139         SPMI_REGULATOR_SUBTYPE_LV_P600          = 0x2b,
 140         SPMI_REGULATOR_SUBTYPE_LV_P1200         = 0x2c,
 141         SPMI_REGULATOR_SUBTYPE_LV_P450          = 0x2d,
 142         SPMI_REGULATOR_SUBTYPE_LV100            = 0x01,
 143         SPMI_REGULATOR_SUBTYPE_LV300            = 0x02,
 144         SPMI_REGULATOR_SUBTYPE_MV300            = 0x08,
 145         SPMI_REGULATOR_SUBTYPE_MV500            = 0x09,
 146         SPMI_REGULATOR_SUBTYPE_HDMI             = 0x10,
 147         SPMI_REGULATOR_SUBTYPE_OTG              = 0x11,
 148         SPMI_REGULATOR_SUBTYPE_5V_BOOST         = 0x01,
 149         SPMI_REGULATOR_SUBTYPE_FTS_CTL          = 0x08,
 150         SPMI_REGULATOR_SUBTYPE_FTS2p5_CTL       = 0x09,
 151         SPMI_REGULATOR_SUBTYPE_BB_2A            = 0x01,
 152         SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL1      = 0x0d,
 153         SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL2      = 0x0e,
 154         SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL3      = 0x0f,
 155         SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL4      = 0x10,
 156 };
 157
 158 enum spmi_common_regulator_registers {
 159         SPMI_COMMON_REG_DIG_MAJOR_REV           = 0x01,
 160         SPMI_COMMON_REG_TYPE                    = 0x04,
 161         SPMI_COMMON_REG_SUBTYPE                 = 0x05,
 162         SPMI_COMMON_REG_VOLTAGE_RANGE           = 0x40,
 163         SPMI_COMMON_REG_VOLTAGE_SET             = 0x41,
 164         SPMI_COMMON_REG_MODE                    = 0x45,
 165         SPMI_COMMON_REG_ENABLE                  = 0x46,
 166         SPMI_COMMON_REG_PULL_DOWN               = 0x48,
 167         SPMI_COMMON_REG_SOFT_START              = 0x4c,
 168         SPMI_COMMON_REG_STEP_CTRL               = 0x61,
 169 };
 170
 171 enum spmi_vs_registers {
 172         SPMI_VS_REG_OCP                         = 0x4a,
 173         SPMI_VS_REG_SOFT_START                  = 0x4c,
 174 };
 175
 176 enum spmi_boost_registers {
 177         SPMI_BOOST_REG_CURRENT_LIMIT            = 0x4a,
 178 };
 179
 180 enum spmi_boost_byp_registers {
 181         SPMI_BOOST_BYP_REG_CURRENT_LIMIT        = 0x4b,
 182 };
 183
 184 /* Used for indexing into ctrl_reg.  These are offets from 0x40 */
 185 enum spmi_common_control_register_index {
 186         SPMI_COMMON_IDX_VOLTAGE_RANGE           = 0,
 187         SPMI_COMMON_IDX_VOLTAGE_SET             = 1,
 188         SPMI_COMMON_IDX_MODE                    = 5,
 189         SPMI_COMMON_IDX_ENABLE                  = 6,
 190 };
 191
 192 /* Common regulator control register layout */
 193 #define SPMI_COMMON_ENABLE_MASK                 0x80
 194 #define SPMI_COMMON_ENABLE                      0x80
 195 #define SPMI_COMMON_DISABLE                     0x00
 196 #define SPMI_COMMON_ENABLE_FOLLOW_HW_EN3_MASK   0x08
 197 #define SPMI_COMMON_ENABLE_FOLLOW_HW_EN2_MASK   0x04
 198 #define SPMI_COMMON_ENABLE_FOLLOW_HW_EN1_MASK   0x02
 199 #define SPMI_COMMON_ENABLE_FOLLOW_HW_EN0_MASK   0x01
 200 #define SPMI_COMMON_ENABLE_FOLLOW_ALL_MASK      0x0f
 201
 202 /* Common regulator mode register layout */
 203 #define SPMI_COMMON_MODE_HPM_MASK               0x80
 204 #define SPMI_COMMON_MODE_AUTO_MASK              0x40
 205 #define SPMI_COMMON_MODE_BYPASS_MASK            0x20
 206 #define SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK      0x10
 207 #define SPMI_COMMON_MODE_FOLLOW_HW_EN3_MASK     0x08
 208 #define SPMI_COMMON_MODE_FOLLOW_HW_EN2_MASK     0x04
 209 #define SPMI_COMMON_MODE_FOLLOW_HW_EN1_MASK     0x02
 210 #define SPMI_COMMON_MODE_FOLLOW_HW_EN0_MASK     0x01
 211 #define SPMI_COMMON_MODE_FOLLOW_ALL_MASK        0x1f
 212
 213 /* Common regulator pull down control register layout */
 214 #define SPMI_COMMON_PULL_DOWN_ENABLE_MASK       0x80
 215
 216 /* LDO regulator current limit control register layout */
 217 #define SPMI_LDO_CURRENT_LIMIT_ENABLE_MASK      0x80
 218
 219 /* LDO regulator soft start control register layout */
 220 #define SPMI_LDO_SOFT_START_ENABLE_MASK         0x80
 221
 222 /* VS regulator over current protection control register layout */
 223 #define SPMI_VS_OCP_OVERRIDE                    0x01
 224 #define SPMI_VS_OCP_NO_OVERRIDE                 0x00
 225
 226 /* VS regulator soft start control register layout */
 227 #define SPMI_VS_SOFT_START_ENABLE_MASK          0x80
 228 #define SPMI_VS_SOFT_START_SEL_MASK             0x03
 229
 230 /* Boost regulator current limit control register layout */
 231 #define SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK    0x80
 232 #define SPMI_BOOST_CURRENT_LIMIT_MASK           0x07
 233
 234 #define SPMI_VS_OCP_DEFAULT_MAX_RETRIES         10
 235 #define SPMI_VS_OCP_DEFAULT_RETRY_DELAY_MS      30
 236 #define SPMI_VS_OCP_FALL_DELAY_US               90
 237 #define SPMI_VS_OCP_FAULT_DELAY_US              20000
 238
 239 #define SPMI_FTSMPS_STEP_CTRL_STEP_MASK         0x18
 240 #define SPMI_FTSMPS_STEP_CTRL_STEP_SHIFT        3
 241 #define SPMI_FTSMPS_STEP_CTRL_DELAY_MASK        0x07
 242 #define SPMI_FTSMPS_STEP_CTRL_DELAY_SHIFT       0
 243
 244 /* Clock rate in kHz of the FTSMPS regulator reference clock. */
 245 #define SPMI_FTSMPS_CLOCK_RATE          19200
 246
 247 /* Minimum voltage stepper delay for each step. */
 248 #define SPMI_FTSMPS_STEP_DELAY          8
 249 #define SPMI_DEFAULT_STEP_DELAY         20
 250
 251 /*
 252  * The ratio SPMI_FTSMPS_STEP_MARGIN_NUM/SPMI_FTSMPS_STEP_MARGIN_DEN is used to
 253  * adjust the step rate in order to account for oscillator variance.
 254  */
 255 #define SPMI_FTSMPS_STEP_MARGIN_NUM     4
 256 #define SPMI_FTSMPS_STEP_MARGIN_DEN     5
 257
 258 /* VSET value to decide the range of ULT SMPS */
 259 #define ULT_SMPS_RANGE_SPLIT 0x60
 260
 261 /**
 262  * struct spmi_voltage_range - regulator set point voltage mapping description
 263  * @min_uV:             Minimum programmable output voltage resulting from
 264  *                      set point register value 0x00
 265  * @max_uV:             Maximum programmable output voltage
 266  * @step_uV:            Output voltage increase resulting from the set point
 267  *                      register value increasing by 1
 268  * @set_point_min_uV:   Minimum allowed voltage
 269  * @set_point_max_uV:   Maximum allowed voltage.  This may be tweaked in order
 270  *                      to pick which range should be used in the case of
 271  *                      overlapping set points.
 272  * @n_voltages:         Number of preferred voltage set points present in this
 273  *                      range
 274  * @range_sel:          Voltage range register value corresponding to this range
 275  *
 276  * The following relationships must be true for the values used in this struct:
 277  * (max_uV - min_uV) % step_uV == 0
 278  * (set_point_min_uV - min_uV) % step_uV == 0*
 279  * (set_point_max_uV - min_uV) % step_uV == 0*
 280  * n_voltages = (set_point_max_uV - set_point_min_uV) / step_uV + 1
 281  *
 282  * *Note, set_point_min_uV == set_point_max_uV == 0 is allowed in order to
 283  * specify that the voltage range has meaning, but is not preferred.
 284  */
 285 struct spmi_voltage_range {
 286         int                                     min_uV;
 287         int                                     max_uV;
 288         int                                     step_uV;
 289         int                                     set_point_min_uV;
 290         int                                     set_point_max_uV;
 291         unsigned                                n_voltages;
 292         u8                                      range_sel;
 293 };
 294
 295 /*
 296  * The ranges specified in the spmi_voltage_set_points struct must be listed
 297  * so that range[i].set_point_max_uV < range[i+1].set_point_min_uV.
 298  */
 299 struct spmi_voltage_set_points {
 300         struct spmi_voltage_range               *range;
 301         int                                     count;
 302         unsigned                                n_voltages;
 303 };
 304
 305 struct spmi_regulator {
 306         struct regulator_desc                   desc;
 307         struct device                           *dev;
 308         struct delayed_work                     ocp_work;
 309         struct regmap                           *regmap;
 310         struct spmi_voltage_set_points          *set_points;
 311         enum spmi_regulator_logical_type        logical_type;
 312         int                                     ocp_irq;
 313         int                                     ocp_count;
 314         int                                     ocp_max_retries;
 315         int                                     ocp_retry_delay_ms;
 316         int                                     hpm_min_load;
 317         int                                     slew_rate;
 318         ktime_t                                 vs_enable_time;
 319         u16                                     base;
 320         struct list_head                        node;
 321 };
 322
 323 struct spmi_regulator_mapping {
 324         enum spmi_regulator_type                type;
 325         enum spmi_regulator_subtype             subtype;
 326         enum spmi_regulator_logical_type        logical_type;
 327         u32                                     revision_min;
 328         u32                                     revision_max;
 329         struct regulator_ops                    *ops;
 330         struct spmi_voltage_set_points          *set_points;
 331         int                                     hpm_min_load;
 332 };
 333
 334 struct spmi_regulator_data {
 335         const char                      *name;
 336         u16                             base;
 337         const char                      *supply;
 338         const char                      *ocp;
 339         u16                             force_type;
 340 };
 341
 342 #define SPMI_VREG(_type, _subtype, _dig_major_min, _dig_major_max, \
 343                       _logical_type, _ops_val, _set_points_val, _hpm_min_load) \
 344         { \
 345                 .type           = SPMI_REGULATOR_TYPE_##_type, \
 346                 .subtype        = SPMI_REGULATOR_SUBTYPE_##_subtype, \
 347                 .revision_min   = _dig_major_min, \
 348                 .revision_max   = _dig_major_max, \
 349                 .logical_type   = SPMI_REGULATOR_LOGICAL_TYPE_##_logical_type, \
 350                 .ops            = &spmi_##_ops_val##_ops, \
 351                 .set_points     = &_set_points_val##_set_points, \
 352                 .hpm_min_load   = _hpm_min_load, \
 353         }
 354
 355 #define SPMI_VREG_VS(_subtype, _dig_major_min, _dig_major_max) \
 356         { \
 357                 .type           = SPMI_REGULATOR_TYPE_VS, \
 358                 .subtype        = SPMI_REGULATOR_SUBTYPE_##_subtype, \
 359                 .revision_min   = _dig_major_min, \
 360                 .revision_max   = _dig_major_max, \
 361                 .logical_type   = SPMI_REGULATOR_LOGICAL_TYPE_VS, \
 362                 .ops            = &spmi_vs_ops, \
 363         }
 364
 365 #define SPMI_VOLTAGE_RANGE(_range_sel, _min_uV, _set_point_min_uV, \
 366                         _set_point_max_uV, _max_uV, _step_uV) \
 367         { \
 368                 .min_uV                 = _min_uV, \
 369                 .max_uV                 = _max_uV, \
 370                 .set_point_min_uV       = _set_point_min_uV, \
 371                 .set_point_max_uV       = _set_point_max_uV, \
 372                 .step_uV                = _step_uV, \
 373                 .range_sel              = _range_sel, \
 374         }
 375
 376 #define DEFINE_SPMI_SET_POINTS(name) \
 377 struct spmi_voltage_set_points name##_set_points = { \
 378         .range  = name##_ranges, \
 379         .count  = ARRAY_SIZE(name##_ranges), \
 380 }
 381
 382 /*
 383  * These tables contain the physically available PMIC regulator voltage setpoint
 384  * ranges.  Where two ranges overlap in hardware, one of the ranges is trimmed
 385  * to ensure that the setpoints available to software are monotonically
 386  * increasing and unique.  The set_voltage callback functions expect these
 387  * properties to hold.
 388  */
 389 static struct spmi_voltage_range pldo_ranges[] = {
 390         SPMI_VOLTAGE_RANGE(2,  750000,  750000, 1537500, 1537500, 12500),
 391         SPMI_VOLTAGE_RANGE(3, 1500000, 1550000, 3075000, 3075000, 25000),
 392         SPMI_VOLTAGE_RANGE(4, 1750000, 3100000, 4900000, 4900000, 50000),
 393 };
 394
 395 static struct spmi_voltage_range nldo1_ranges[] = {
 396         SPMI_VOLTAGE_RANGE(2,  750000,  750000, 1537500, 1537500, 12500),
 397 };
 398
 399 static struct spmi_voltage_range nldo2_ranges[] = {
 400         SPMI_VOLTAGE_RANGE(0,  375000,       0,       0, 1537500, 12500),
 401         SPMI_VOLTAGE_RANGE(1,  375000,  375000,  768750,  768750,  6250),
 402         SPMI_VOLTAGE_RANGE(2,  750000,  775000, 1537500, 1537500, 12500),
 403 };
 404
 405 static struct spmi_voltage_range nldo3_ranges[] = {
 406         SPMI_VOLTAGE_RANGE(0,  375000,  375000, 1537500, 1537500, 12500),
 407         SPMI_VOLTAGE_RANGE(1,  375000,       0,       0, 1537500, 12500),
 408         SPMI_VOLTAGE_RANGE(2,  750000,       0,       0, 1537500, 12500),
 409 };
 410
 411 static struct spmi_voltage_range ln_ldo_ranges[] = {
 412         SPMI_VOLTAGE_RANGE(1,  690000,  690000, 1110000, 1110000, 60000),
 413         SPMI_VOLTAGE_RANGE(0, 1380000, 1380000, 2220000, 2220000, 120000),
 414 };
 415
 416 static struct spmi_voltage_range smps_ranges[] = {
 417         SPMI_VOLTAGE_RANGE(0,  375000,  375000, 1562500, 1562500, 12500),
 418         SPMI_VOLTAGE_RANGE(1, 1550000, 1575000, 3125000, 3125000, 25000),
 419 };
 420
 421 static struct spmi_voltage_range ftsmps_ranges[] = {
 422         SPMI_VOLTAGE_RANGE(0,       0,  350000, 1275000, 1275000,  5000),
 423         SPMI_VOLTAGE_RANGE(1,       0, 1280000, 2040000, 2040000, 10000),
 424 };
 425
 426 static struct spmi_voltage_range ftsmps2p5_ranges[] = {
 427         SPMI_VOLTAGE_RANGE(0,   80000,  350000, 1355000, 1355000,  5000),
 428         SPMI_VOLTAGE_RANGE(1,  160000, 1360000, 2200000, 2200000, 10000),
 429 };
 430
 431 static struct spmi_voltage_range boost_ranges[] = {
 432         SPMI_VOLTAGE_RANGE(0, 4000000, 4000000, 5550000, 5550000, 50000),
 433 };
 434
 435 static struct spmi_voltage_range boost_byp_ranges[] = {
 436         SPMI_VOLTAGE_RANGE(0, 2500000, 2500000, 5200000, 5650000, 50000),
 437 };
 438
 439 static struct spmi_voltage_range ult_lo_smps_ranges[] = {
 440         SPMI_VOLTAGE_RANGE(0,  375000,  375000, 1562500, 1562500, 12500),
 441         SPMI_VOLTAGE_RANGE(1,  750000,       0,       0, 1525000, 25000),
 442 };
 443
 444 static struct spmi_voltage_range ult_ho_smps_ranges[] = {
 445         SPMI_VOLTAGE_RANGE(0, 1550000, 1550000, 2325000, 2325000, 25000),
 446 };
 447
 448 static struct spmi_voltage_range ult_nldo_ranges[] = {
 449         SPMI_VOLTAGE_RANGE(0,  375000,  375000, 1537500, 1537500, 12500),
 450 };
 451
 452 static struct spmi_voltage_range ult_pldo_ranges[] = {
 453         SPMI_VOLTAGE_RANGE(0, 1750000, 1750000, 3337500, 3337500, 12500),
 454 };
 455
 456 static DEFINE_SPMI_SET_POINTS(pldo);
 457 static DEFINE_SPMI_SET_POINTS(nldo1);
 458 static DEFINE_SPMI_SET_POINTS(nldo2);
 459 static DEFINE_SPMI_SET_POINTS(nldo3);
 460 static DEFINE_SPMI_SET_POINTS(ln_ldo);
 461 static DEFINE_SPMI_SET_POINTS(smps);
 462 static DEFINE_SPMI_SET_POINTS(ftsmps);
 463 static DEFINE_SPMI_SET_POINTS(ftsmps2p5);
 464 static DEFINE_SPMI_SET_POINTS(boost);
 465 static DEFINE_SPMI_SET_POINTS(boost_byp);
 466 static DEFINE_SPMI_SET_POINTS(ult_lo_smps);
 467 static DEFINE_SPMI_SET_POINTS(ult_ho_smps);
 468 static DEFINE_SPMI_SET_POINTS(ult_nldo);
 469 static DEFINE_SPMI_SET_POINTS(ult_pldo);
 470
 471 static inline int spmi_vreg_read(struct spmi_regulator *vreg, u16 addr, u8 *buf,
 472                                  int len)
 473 {
 474         return regmap_bulk_read(vreg->regmap, vreg->base + addr, buf, len);
 475 }
 476
 477 static inline int spmi_vreg_write(struct spmi_regulator *vreg, u16 addr,
 478                                 u8 *buf, int len)
 479 {
 480         return regmap_bulk_write(vreg->regmap, vreg->base + addr, buf, len);
 481 }
 482
 483 static int spmi_vreg_update_bits(struct spmi_regulator *vreg, u16 addr, u8 val,
 484                 u8 mask)
 485 {
 486         return regmap_update_bits(vreg->regmap, vreg->base + addr, mask, val);
 487 }
 488
 489 static int spmi_regulator_common_is_enabled(struct regulator_dev *rdev)
 490 {
 491         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 492         u8 reg;
 493
 494         spmi_vreg_read(vreg, SPMI_COMMON_REG_ENABLE, &reg, 1);
 495
 496         return (reg & SPMI_COMMON_ENABLE_MASK) == SPMI_COMMON_ENABLE;
 497 }
 498
 499 static int spmi_regulator_common_enable(struct regulator_dev *rdev)
 500 {
 501         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 502
 503         return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
 504                 SPMI_COMMON_ENABLE, SPMI_COMMON_ENABLE_MASK);
 505 }
 506
 507 static int spmi_regulator_vs_enable(struct regulator_dev *rdev)
 508 {
 509         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 510
 511         if (vreg->ocp_irq) {
 512                 vreg->ocp_count = 0;
 513                 vreg->vs_enable_time = ktime_get();
 514         }
 515
 516         return spmi_regulator_common_enable(rdev);
 517 }
 518
 519 static int spmi_regulator_vs_ocp(struct regulator_dev *rdev)
 520 {
 521         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 522         u8 reg = SPMI_VS_OCP_OVERRIDE;
 523
 524         return spmi_vreg_write(vreg, SPMI_VS_REG_OCP, &reg, 1);
 525 }
 526
 527 static int spmi_regulator_common_disable(struct regulator_dev *rdev)
 528 {
 529         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 530
 531         return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
 532                 SPMI_COMMON_DISABLE, SPMI_COMMON_ENABLE_MASK);
 533 }
 534
 535 static int spmi_regulator_select_voltage(struct spmi_regulator *vreg,
 536                                          int min_uV, int max_uV)
 537 {
 538         const struct spmi_voltage_range *range;
 539         int uV = min_uV;
 540         int lim_min_uV, lim_max_uV, i, range_id, range_max_uV;
 541         int selector, voltage_sel;
 542
 543         /* Check if request voltage is outside of physically settable range. */
 544         lim_min_uV = vreg->set_points->range[0].set_point_min_uV;
 545         lim_max_uV =
 546           vreg->set_points->range[vreg->set_points->count - 1].set_point_max_uV;
 547
 548         if (uV < lim_min_uV && max_uV >= lim_min_uV)
 549                 uV = lim_min_uV;
 550
 551         if (uV < lim_min_uV || uV > lim_max_uV) {
 552                 dev_err(vreg->dev,
 553                         "request v=[%d, %d] is outside possible v=[%d, %d]\n",
 554                          min_uV, max_uV, lim_min_uV, lim_max_uV);
 555                 return -EINVAL;
 556         }
 557
 558         /* Find the range which uV is inside of. */
 559         for (i = vreg->set_points->count - 1; i > 0; i--) {
 560                 range_max_uV = vreg->set_points->range[i - 1].set_point_max_uV;
 561                 if (uV > range_max_uV && range_max_uV > 0)
 562                         break;
 563         }
 564
 565         range_id = i;
 566         range = &vreg->set_points->range[range_id];
 567
 568         /*
 569          * Force uV to be an allowed set point by applying a ceiling function to
 570          * the uV value.
 571          */
 572         voltage_sel = DIV_ROUND_UP(uV - range->min_uV, range->step_uV);
 573         uV = voltage_sel * range->step_uV + range->min_uV;
 574
 575         if (uV > max_uV) {
 576                 dev_err(vreg->dev,
 577                         "request v=[%d, %d] cannot be met by any set point; "
 578                         "next set point: %d\n",
 579                         min_uV, max_uV, uV);
 580                 return -EINVAL;
 581         }
 582
 583         selector = 0;
 584         for (i = 0; i < range_id; i++)
 585                 selector += vreg->set_points->range[i].n_voltages;
 586         selector += (uV - range->set_point_min_uV) / range->step_uV;
 587
 588         return selector;
 589 }
 590
 591 static int spmi_sw_selector_to_hw(struct spmi_regulator *vreg,
 592                                   unsigned selector, u8 *range_sel,
 593                                   u8 *voltage_sel)
 594 {
 595         const struct spmi_voltage_range *range, *end;
 596         unsigned offset;
 597
 598         range = vreg->set_points->range;
 599         end = range + vreg->set_points->count;
 600
 601         for (; range < end; range++) {
 602                 if (selector < range->n_voltages) {
 603                         /*
 604                          * hardware selectors between set point min and real
 605                          * min are invalid so we ignore them
 606                          */
 607                         offset = range->set_point_min_uV - range->min_uV;
 608                         offset /= range->step_uV;
 609                         *voltage_sel = selector + offset;
 610                         *range_sel = range->range_sel;
 611                         return 0;
 612                 }
 613
 614                 selector -= range->n_voltages;
 615         }
 616
 617         return -EINVAL;
 618 }
 619
 620 static int spmi_hw_selector_to_sw(struct spmi_regulator *vreg, u8 hw_sel,
 621                                   const struct spmi_voltage_range *range)
 622 {
 623         unsigned sw_sel = 0;
 624         unsigned offset, max_hw_sel;
 625         const struct spmi_voltage_range *r = vreg->set_points->range;
 626         const struct spmi_voltage_range *end = r + vreg->set_points->count;
 627
 628         for (; r < end; r++) {
 629                 if (r == range && range->n_voltages) {
 630                         /*
 631                          * hardware selectors between set point min and real
 632                          * min and between set point max and real max are
 633                          * invalid so we return an error if they're
 634                          * programmed into the hardware
 635                          */
 636                         offset = range->set_point_min_uV - range->min_uV;
 637                         offset /= range->step_uV;
 638                         if (hw_sel < offset)
 639                                 return -EINVAL;
 640
 641                         max_hw_sel = range->set_point_max_uV - range->min_uV;
 642                         max_hw_sel /= range->step_uV;
 643                         if (hw_sel > max_hw_sel)
 644                                 return -EINVAL;
 645
 646                         return sw_sel + hw_sel - offset;
 647                 }
 648                 sw_sel += r->n_voltages;
 649         }
 650
 651         return -EINVAL;
 652 }
 653
 654 static const struct spmi_voltage_range *
 655 spmi_regulator_find_range(struct spmi_regulator *vreg)
 656 {
 657         u8 range_sel;
 658         const struct spmi_voltage_range *range, *end;
 659
 660         range = vreg->set_points->range;
 661         end = range + vreg->set_points->count;
 662
 663         spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, &range_sel, 1);
 664
 665         for (; range < end; range++)
 666                 if (range->range_sel == range_sel)
 667                         return range;
 668
 669         return NULL;
 670 }
 671
 672 static int spmi_regulator_select_voltage_same_range(struct spmi_regulator *vreg,
 673                 int min_uV, int max_uV)
 674 {
 675         const struct spmi_voltage_range *range;
 676         int uV = min_uV;
 677         int i, selector;
 678
 679         range = spmi_regulator_find_range(vreg);
 680         if (!range)
 681                 goto different_range;
 682
 683         if (uV < range->min_uV && max_uV >= range->min_uV)
 684                 uV = range->min_uV;
 685
 686         if (uV < range->min_uV || uV > range->max_uV) {
 687                 /* Current range doesn't support the requested voltage. */
 688                 goto different_range;
 689         }
 690
 691         /*
 692          * Force uV to be an allowed set point by applying a ceiling function to
 693          * the uV value.
 694          */
 695         uV = DIV_ROUND_UP(uV - range->min_uV, range->step_uV);
 696         uV = uV * range->step_uV + range->min_uV;
 697
 698         if (uV > max_uV) {
 699                 /*
 700                  * No set point in the current voltage range is within the
 701                  * requested min_uV to max_uV range.
 702                  */
 703                 goto different_range;
 704         }
 705
 706         selector = 0;
 707         for (i = 0; i < vreg->set_points->count; i++) {
 708                 if (uV >= vreg->set_points->range[i].set_point_min_uV
 709                     && uV <= vreg->set_points->range[i].set_point_max_uV) {
 710                         selector +=
 711                             (uV - vreg->set_points->range[i].set_point_min_uV)
 712                                 / vreg->set_points->range[i].step_uV;
 713                         break;
 714                 }
 715
 716                 selector += vreg->set_points->range[i].n_voltages;
 717         }
 718
 719         if (selector >= vreg->set_points->n_voltages)
 720                 goto different_range;
 721
 722         return selector;
 723
 724 different_range:
 725         return spmi_regulator_select_voltage(vreg, min_uV, max_uV);
 726 }
 727
 728 static int spmi_regulator_common_map_voltage(struct regulator_dev *rdev,
 729                                              int min_uV, int max_uV)
 730 {
 731         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 732
 733         /*
 734          * Favor staying in the current voltage range if possible.  This avoids
 735          * voltage spikes that occur when changing the voltage range.
 736          */
 737         return spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV);
 738 }
 739
 740 static int
 741 spmi_regulator_common_set_voltage(struct regulator_dev *rdev, unsigned selector)
 742 {
 743         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 744         int ret;
 745         u8 buf[2];
 746         u8 range_sel, voltage_sel;
 747
 748         ret = spmi_sw_selector_to_hw(vreg, selector, &range_sel, &voltage_sel);
 749         if (ret)
 750                 return ret;
 751
 752         buf[0] = range_sel;
 753         buf[1] = voltage_sel;
 754         return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, buf, 2);
 755 }
 756
 757 static int spmi_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
 758                 unsigned int old_selector, unsigned int new_selector)
 759 {
 760         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 761         const struct spmi_voltage_range *range;
 762         int diff_uV;
 763
 764         range = spmi_regulator_find_range(vreg);
 765         if (!range)
 766                 return -EINVAL;
 767
 768         diff_uV = abs(new_selector - old_selector) * range->step_uV;
 769
 770         return DIV_ROUND_UP(diff_uV, vreg->slew_rate);
 771 }
 772
 773 static int spmi_regulator_common_get_voltage(struct regulator_dev *rdev)
 774 {
 775         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 776         const struct spmi_voltage_range *range;
 777         u8 voltage_sel;
 778
 779         spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
 780
 781         range = spmi_regulator_find_range(vreg);
 782         if (!range)
 783                 return -EINVAL;
 784
 785         return spmi_hw_selector_to_sw(vreg, voltage_sel, range);
 786 }
 787
 788 static int spmi_regulator_single_map_voltage(struct regulator_dev *rdev,
 789                 int min_uV, int max_uV)
 790 {
 791         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 792
 793         return spmi_regulator_select_voltage(vreg, min_uV, max_uV);
 794 }
 795
 796 static int spmi_regulator_single_range_set_voltage(struct regulator_dev *rdev,
 797                                                    unsigned selector)
 798 {
 799         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 800         u8 sel = selector;
 801
 802         /*
 803          * Certain types of regulators do not have a range select register so
 804          * only voltage set register needs to be written.
 805          */
 806         return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &sel, 1);
 807 }
 808
 809 static int spmi_regulator_single_range_get_voltage(struct regulator_dev *rdev)
 810 {
 811         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 812         u8 selector;
 813         int ret;
 814
 815         ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &selector, 1);
 816         if (ret)
 817                 return ret;
 818
 819         return selector;
 820 }
 821
 822 static int spmi_regulator_ult_lo_smps_set_voltage(struct regulator_dev *rdev,
 823                                                   unsigned selector)
 824 {
 825         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 826         int ret;
 827         u8 range_sel, voltage_sel;
 828
 829         ret = spmi_sw_selector_to_hw(vreg, selector, &range_sel, &voltage_sel);
 830         if (ret)
 831                 return ret;
 832
 833         /*
 834          * Calculate VSET based on range
 835          * In case of range 0: voltage_sel is a 7 bit value, can be written
 836          *                      witout any modification.
 837          * In case of range 1: voltage_sel is a 5 bit value, bits[7-5] set to
 838          *                      [011].
 839          */
 840         if (range_sel == 1)
 841                 voltage_sel |= ULT_SMPS_RANGE_SPLIT;
 842
 843         return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_VOLTAGE_SET,
 844                                      voltage_sel, 0xff);
 845 }
 846
 847 static int spmi_regulator_ult_lo_smps_get_voltage(struct regulator_dev *rdev)
 848 {
 849         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 850         const struct spmi_voltage_range *range;
 851         u8 voltage_sel;
 852
 853         spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
 854
 855         range = spmi_regulator_find_range(vreg);
 856         if (!range)
 857                 return -EINVAL;
 858
 859         if (range->range_sel == 1)
 860                 voltage_sel &= ~ULT_SMPS_RANGE_SPLIT;
 861
 862         return spmi_hw_selector_to_sw(vreg, voltage_sel, range);
 863 }
 864
 865 static int spmi_regulator_common_list_voltage(struct regulator_dev *rdev,
 866                         unsigned selector)
 867 {
 868         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 869         int uV = 0;
 870         int i;
 871
 872         if (selector >= vreg->set_points->n_voltages)
 873                 return 0;
 874
 875         for (i = 0; i < vreg->set_points->count; i++) {
 876                 if (selector < vreg->set_points->range[i].n_voltages) {
 877                         uV = selector * vreg->set_points->range[i].step_uV
 878                                 + vreg->set_points->range[i].set_point_min_uV;
 879                         break;
 880                 }
 881
 882                 selector -= vreg->set_points->range[i].n_voltages;
 883         }
 884
 885         return uV;
 886 }
 887
 888 static int
 889 spmi_regulator_common_set_bypass(struct regulator_dev *rdev, bool enable)
 890 {
 891         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 892         u8 mask = SPMI_COMMON_MODE_BYPASS_MASK;
 893         u8 val = 0;
 894
 895         if (enable)
 896                 val = mask;
 897
 898         return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
 899 }
 900
 901 static int
 902 spmi_regulator_common_get_bypass(struct regulator_dev *rdev, bool *enable)
 903 {
 904         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 905         u8 val;
 906         int ret;
 907
 908         ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, &val, 1);
 909         *enable = val & SPMI_COMMON_MODE_BYPASS_MASK;
 910
 911         return ret;
 912 }
 913
 914 static unsigned int spmi_regulator_common_get_mode(struct regulator_dev *rdev)
 915 {
 916         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 917         u8 reg;
 918
 919         spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, &reg, 1);
 920
 921         if (reg & SPMI_COMMON_MODE_HPM_MASK)
 922                 return REGULATOR_MODE_NORMAL;
 923
 924         if (reg & SPMI_COMMON_MODE_AUTO_MASK)
 925                 return REGULATOR_MODE_FAST;
 926
 927         return REGULATOR_MODE_IDLE;
 928 }
 929
 930 static int
 931 spmi_regulator_common_set_mode(struct regulator_dev *rdev, unsigned int mode)
 932 {
 933         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 934         u8 mask = SPMI_COMMON_MODE_HPM_MASK | SPMI_COMMON_MODE_AUTO_MASK;
 935         u8 val = 0;
 936
 937         if (mode == REGULATOR_MODE_NORMAL)
 938                 val = SPMI_COMMON_MODE_HPM_MASK;
 939         else if (mode == REGULATOR_MODE_FAST)
 940                 val = SPMI_COMMON_MODE_AUTO_MASK;
 941
 942         return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
 943 }
 944
 945 static int
 946 spmi_regulator_common_set_load(struct regulator_dev *rdev, int load_uA)
 947 {
 948         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 949         unsigned int mode;
 950
 951         if (load_uA >= vreg->hpm_min_load)
 952                 mode = REGULATOR_MODE_NORMAL;
 953         else
 954                 mode = REGULATOR_MODE_IDLE;
 955
 956         return spmi_regulator_common_set_mode(rdev, mode);
 957 }
 958
 959 static int spmi_regulator_common_set_pull_down(struct regulator_dev *rdev)
 960 {
 961         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 962         unsigned int mask = SPMI_COMMON_PULL_DOWN_ENABLE_MASK;
 963
 964         return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_PULL_DOWN,
 965                                      mask, mask);
 966 }
 967
 968 static int spmi_regulator_common_set_soft_start(struct regulator_dev *rdev)
 969 {
 970         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 971         unsigned int mask = SPMI_LDO_SOFT_START_ENABLE_MASK;
 972
 973         return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_SOFT_START,
 974                                      mask, mask);
 975 }
 976
 977 static int spmi_regulator_set_ilim(struct regulator_dev *rdev, int ilim_uA)
 978 {
 979         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
 980         enum spmi_regulator_logical_type type = vreg->logical_type;
 981         unsigned int current_reg;
 982         u8 reg;
 983         u8 mask = SPMI_BOOST_CURRENT_LIMIT_MASK |
 984                   SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK;
 985         int max = (SPMI_BOOST_CURRENT_LIMIT_MASK + 1) * 500;
 986
 987         if (type == SPMI_REGULATOR_LOGICAL_TYPE_BOOST)
 988                 current_reg = SPMI_BOOST_REG_CURRENT_LIMIT;
 989         else
 990                 current_reg = SPMI_BOOST_BYP_REG_CURRENT_LIMIT;
 991
 992         if (ilim_uA > max || ilim_uA <= 0)
 993                 return -EINVAL;
 994
 995         reg = (ilim_uA - 1) / 500;
 996         reg |= SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK;
 997
 998         return spmi_vreg_update_bits(vreg, current_reg, reg, mask);
 999 }
1000
1001 static int spmi_regulator_vs_clear_ocp(struct spmi_regulator *vreg)
1002 {
1003         int ret;
1004
1005         ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
1006                 SPMI_COMMON_DISABLE, SPMI_COMMON_ENABLE_MASK);
1007
1008         vreg->vs_enable_time = ktime_get();
1009
1010         ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
1011                 SPMI_COMMON_ENABLE, SPMI_COMMON_ENABLE_MASK);
1012
1013         return ret;
1014 }
1015
1016 static void spmi_regulator_vs_ocp_work(struct work_struct *work)
1017 {
1018         struct delayed_work *dwork = to_delayed_work(work);
1019         struct spmi_regulator *vreg
1020                 = container_of(dwork, struct spmi_regulator, ocp_work);
1021
1022         spmi_regulator_vs_clear_ocp(vreg);
1023 }
1024
1025 static irqreturn_t spmi_regulator_vs_ocp_isr(int irq, void *data)
1026 {
1027         struct spmi_regulator *vreg = data;
1028         ktime_t ocp_irq_time;
1029         s64 ocp_trigger_delay_us;
1030
1031         ocp_irq_time = ktime_get();
1032         ocp_trigger_delay_us = ktime_us_delta(ocp_irq_time,
1033                                                 vreg->vs_enable_time);
1034
1035         /*
1036          * Reset the OCP count if there is a large delay between switch enable
1037          * and when OCP triggers.  This is indicative of a hotplug event as
1038          * opposed to a fault.
1039          */
1040         if (ocp_trigger_delay_us > SPMI_VS_OCP_FAULT_DELAY_US)
1041                 vreg->ocp_count = 0;
1042
1043         /* Wait for switch output to settle back to 0 V after OCP triggered. */
1044         udelay(SPMI_VS_OCP_FALL_DELAY_US);
1045
1046         vreg->ocp_count++;
1047
1048         if (vreg->ocp_count == 1) {
1049                 /* Immediately clear the over current condition. */
1050                 spmi_regulator_vs_clear_ocp(vreg);
1051         } else if (vreg->ocp_count <= vreg->ocp_max_retries) {
1052                 /* Schedule the over current clear task to run later. */
1053                 schedule_delayed_work(&vreg->ocp_work,
1054                         msecs_to_jiffies(vreg->ocp_retry_delay_ms) + 1);
1055         } else {
1056                 dev_err(vreg->dev,
1057                         "OCP triggered %d times; no further retries\n",
1058                         vreg->ocp_count);
1059         }
1060
1061         return IRQ_HANDLED;
1062 }
1063
1064 static struct regulator_ops spmi_smps_ops = {
1065         .enable                 = spmi_regulator_common_enable,
1066         .disable                = spmi_regulator_common_disable,
1067         .is_enabled             = spmi_regulator_common_is_enabled,
1068         .set_voltage_sel        = spmi_regulator_common_set_voltage,
1069         .set_voltage_time_sel   = spmi_regulator_set_voltage_time_sel,
1070         .get_voltage_sel        = spmi_regulator_common_get_voltage,
1071         .map_voltage            = spmi_regulator_common_map_voltage,
1072         .list_voltage           = spmi_regulator_common_list_voltage,
1073         .set_mode               = spmi_regulator_common_set_mode,
1074         .get_mode               = spmi_regulator_common_get_mode,
1075         .set_load               = spmi_regulator_common_set_load,
1076         .set_pull_down          = spmi_regulator_common_set_pull_down,
1077 };
1078
1079 static struct regulator_ops spmi_ldo_ops = {
1080         .enable                 = spmi_regulator_common_enable,
1081         .disable                = spmi_regulator_common_disable,
1082         .is_enabled             = spmi_regulator_common_is_enabled,
1083         .set_voltage_sel        = spmi_regulator_common_set_voltage,
1084         .get_voltage_sel        = spmi_regulator_common_get_voltage,
1085         .map_voltage            = spmi_regulator_common_map_voltage,
1086         .list_voltage           = spmi_regulator_common_list_voltage,
1087         .set_mode               = spmi_regulator_common_set_mode,
1088         .get_mode               = spmi_regulator_common_get_mode,
1089         .set_load               = spmi_regulator_common_set_load,
1090         .set_bypass             = spmi_regulator_common_set_bypass,
1091         .get_bypass             = spmi_regulator_common_get_bypass,
1092         .set_pull_down          = spmi_regulator_common_set_pull_down,
1093         .set_soft_start         = spmi_regulator_common_set_soft_start,
1094 };
1095
1096 static struct regulator_ops spmi_ln_ldo_ops = {
1097         .enable                 = spmi_regulator_common_enable,
1098         .disable                = spmi_regulator_common_disable,
1099         .is_enabled             = spmi_regulator_common_is_enabled,
1100         .set_voltage_sel        = spmi_regulator_common_set_voltage,
1101         .get_voltage_sel        = spmi_regulator_common_get_voltage,
1102         .map_voltage            = spmi_regulator_common_map_voltage,
1103         .list_voltage           = spmi_regulator_common_list_voltage,
1104         .set_bypass             = spmi_regulator_common_set_bypass,
1105         .get_bypass             = spmi_regulator_common_get_bypass,
1106 };
1107
1108 static struct regulator_ops spmi_vs_ops = {
1109         .enable                 = spmi_regulator_vs_enable,
1110         .disable                = spmi_regulator_common_disable,
1111         .is_enabled             = spmi_regulator_common_is_enabled,
1112         .set_pull_down          = spmi_regulator_common_set_pull_down,
1113         .set_soft_start         = spmi_regulator_common_set_soft_start,
1114         .set_over_current_protection = spmi_regulator_vs_ocp,
1115         .set_mode               = spmi_regulator_common_set_mode,
1116         .get_mode               = spmi_regulator_common_get_mode,
1117 };
1118
1119 static struct regulator_ops spmi_boost_ops = {
1120         .enable                 = spmi_regulator_common_enable,
1121         .disable                = spmi_regulator_common_disable,
1122         .is_enabled             = spmi_regulator_common_is_enabled,
1123         .set_voltage_sel        = spmi_regulator_single_range_set_voltage,
1124         .get_voltage_sel        = spmi_regulator_single_range_get_voltage,
1125         .map_voltage            = spmi_regulator_single_map_voltage,
1126         .list_voltage           = spmi_regulator_common_list_voltage,
1127         .set_input_current_limit = spmi_regulator_set_ilim,
1128 };
1129
1130 static struct regulator_ops spmi_ftsmps_ops = {
1131         .enable                 = spmi_regulator_common_enable,
1132         .disable                = spmi_regulator_common_disable,
1133         .is_enabled             = spmi_regulator_common_is_enabled,
1134         .set_voltage_sel        = spmi_regulator_common_set_voltage,
1135         .set_voltage_time_sel   = spmi_regulator_set_voltage_time_sel,
1136         .get_voltage_sel        = spmi_regulator_common_get_voltage,
1137         .map_voltage            = spmi_regulator_common_map_voltage,
1138         .list_voltage           = spmi_regulator_common_list_voltage,
1139         .set_mode               = spmi_regulator_common_set_mode,
1140         .get_mode               = spmi_regulator_common_get_mode,
1141         .set_load               = spmi_regulator_common_set_load,
1142         .set_pull_down          = spmi_regulator_common_set_pull_down,
1143 };
1144
1145 static struct regulator_ops spmi_ult_lo_smps_ops = {
1146         .enable                 = spmi_regulator_common_enable,
1147         .disable                = spmi_regulator_common_disable,
1148         .is_enabled             = spmi_regulator_common_is_enabled,
1149         .set_voltage_sel        = spmi_regulator_ult_lo_smps_set_voltage,
1150         .set_voltage_time_sel   = spmi_regulator_set_voltage_time_sel,
1151         .get_voltage_sel        = spmi_regulator_ult_lo_smps_get_voltage,
1152         .list_voltage           = spmi_regulator_common_list_voltage,
1153         .set_mode               = spmi_regulator_common_set_mode,
1154         .get_mode               = spmi_regulator_common_get_mode,
1155         .set_load               = spmi_regulator_common_set_load,
1156         .set_pull_down          = spmi_regulator_common_set_pull_down,
1157 };
1158
1159 static struct regulator_ops spmi_ult_ho_smps_ops = {
1160         .enable                 = spmi_regulator_common_enable,
1161         .disable                = spmi_regulator_common_disable,
1162         .is_enabled             = spmi_regulator_common_is_enabled,
1163         .set_voltage_sel        = spmi_regulator_single_range_set_voltage,
1164         .set_voltage_time_sel   = spmi_regulator_set_voltage_time_sel,
1165         .get_voltage_sel        = spmi_regulator_single_range_get_voltage,
1166         .map_voltage            = spmi_regulator_single_map_voltage,
1167         .list_voltage           = spmi_regulator_common_list_voltage,
1168         .set_mode               = spmi_regulator_common_set_mode,
1169         .get_mode               = spmi_regulator_common_get_mode,
1170         .set_load               = spmi_regulator_common_set_load,
1171         .set_pull_down          = spmi_regulator_common_set_pull_down,
1172 };
1173
1174 static struct regulator_ops spmi_ult_ldo_ops = {
1175         .enable                 = spmi_regulator_common_enable,
1176         .disable                = spmi_regulator_common_disable,
1177         .is_enabled             = spmi_regulator_common_is_enabled,
1178         .set_voltage_sel        = spmi_regulator_single_range_set_voltage,
1179         .get_voltage_sel        = spmi_regulator_single_range_get_voltage,
1180         .map_voltage            = spmi_regulator_single_map_voltage,
1181         .list_voltage           = spmi_regulator_common_list_voltage,
1182         .set_mode               = spmi_regulator_common_set_mode,
1183         .get_mode               = spmi_regulator_common_get_mode,
1184         .set_load               = spmi_regulator_common_set_load,
1185         .set_bypass             = spmi_regulator_common_set_bypass,
1186         .get_bypass             = spmi_regulator_common_get_bypass,
1187         .set_pull_down          = spmi_regulator_common_set_pull_down,
1188         .set_soft_start         = spmi_regulator_common_set_soft_start,
1189 };
1190
1191 /* Maximum possible digital major revision value */
1192 #define INF 0xFF
1193
1194 static const struct spmi_regulator_mapping supported_regulators[] = {
1195         /*           type subtype dig_min dig_max ltype ops setpoints hpm_min */
1196         SPMI_VREG(BUCK,  GP_CTL,   0, INF, SMPS,   smps,   smps,   100000),
1197         SPMI_VREG(LDO,   N300,     0, INF, LDO,    ldo,    nldo1,   10000),
1198         SPMI_VREG(LDO,   N600,     0,   0, LDO,    ldo,    nldo2,   10000),
1199         SPMI_VREG(LDO,   N1200,    0,   0, LDO,    ldo,    nldo2,   10000),
1200         SPMI_VREG(LDO,   N600,     1, INF, LDO,    ldo,    nldo3,   10000),
1201         SPMI_VREG(LDO,   N1200,    1, INF, LDO,    ldo,    nldo3,   10000),
1202         SPMI_VREG(LDO,   N600_ST,  0,   0, LDO,    ldo,    nldo2,   10000),
1203         SPMI_VREG(LDO,   N1200_ST, 0,   0, LDO,    ldo,    nldo2,   10000),
1204         SPMI_VREG(LDO,   N600_ST,  1, INF, LDO,    ldo,    nldo3,   10000),
1205         SPMI_VREG(LDO,   N1200_ST, 1, INF, LDO,    ldo,    nldo3,   10000),
1206         SPMI_VREG(LDO,   P50,      0, INF, LDO,    ldo,    pldo,     5000),
1207         SPMI_VREG(LDO,   P150,     0, INF, LDO,    ldo,    pldo,    10000),
1208         SPMI_VREG(LDO,   P300,     0, INF, LDO,    ldo,    pldo,    10000),
1209         SPMI_VREG(LDO,   P600,     0, INF, LDO,    ldo,    pldo,    10000),
1210         SPMI_VREG(LDO,   P1200,    0, INF, LDO,    ldo,    pldo,    10000),
1211         SPMI_VREG(LDO,   LN,       0, INF, LN_LDO, ln_ldo, ln_ldo,      0),
1212         SPMI_VREG(LDO,   LV_P50,   0, INF, LDO,    ldo,    pldo,     5000),
1213         SPMI_VREG(LDO,   LV_P150,  0, INF, LDO,    ldo,    pldo,    10000),
1214         SPMI_VREG(LDO,   LV_P300,  0, INF, LDO,    ldo,    pldo,    10000),
1215         SPMI_VREG(LDO,   LV_P600,  0, INF, LDO,    ldo,    pldo,    10000),
1216         SPMI_VREG(LDO,   LV_P1200, 0, INF, LDO,    ldo,    pldo,    10000),
1217         SPMI_VREG_VS(LV100,        0, INF),
1218         SPMI_VREG_VS(LV300,        0, INF),
1219         SPMI_VREG_VS(MV300,        0, INF),
1220         SPMI_VREG_VS(MV500,        0, INF),
1221         SPMI_VREG_VS(HDMI,         0, INF),
1222         SPMI_VREG_VS(OTG,          0, INF),
1223         SPMI_VREG(BOOST, 5V_BOOST, 0, INF, BOOST,  boost,  boost,       0),
1224         SPMI_VREG(FTS,   FTS_CTL,  0, INF, FTSMPS, ftsmps, ftsmps, 100000),
1225         SPMI_VREG(FTS, FTS2p5_CTL, 0, INF, FTSMPS, ftsmps, ftsmps2p5, 100000),
1226         SPMI_VREG(BOOST_BYP, BB_2A, 0, INF, BOOST_BYP, boost, boost_byp, 0),
1227         SPMI_VREG(ULT_BUCK, ULT_HF_CTL1, 0, INF, ULT_LO_SMPS, ult_lo_smps,
1228                                                 ult_lo_smps,   100000),
1229         SPMI_VREG(ULT_BUCK, ULT_HF_CTL2, 0, INF, ULT_LO_SMPS, ult_lo_smps,
1230                                                 ult_lo_smps,   100000),
1231         SPMI_VREG(ULT_BUCK, ULT_HF_CTL3, 0, INF, ULT_LO_SMPS, ult_lo_smps,
1232                                                 ult_lo_smps,   100000),
1233         SPMI_VREG(ULT_BUCK, ULT_HF_CTL4, 0, INF, ULT_HO_SMPS, ult_ho_smps,
1234                                                 ult_ho_smps,   100000),
1235         SPMI_VREG(ULT_LDO, N300_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1236         SPMI_VREG(ULT_LDO, N600_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1237         SPMI_VREG(ULT_LDO, N900_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1238         SPMI_VREG(ULT_LDO, N1200_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1239         SPMI_VREG(ULT_LDO, LV_P150,  0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1240         SPMI_VREG(ULT_LDO, LV_P300,  0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1241         SPMI_VREG(ULT_LDO, LV_P450,  0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1242         SPMI_VREG(ULT_LDO, P600,     0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1243         SPMI_VREG(ULT_LDO, P150,     0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1244         SPMI_VREG(ULT_LDO, P50,     0, INF, ULT_LDO, ult_ldo, ult_pldo, 5000),
1245 };
1246
1247 static void spmi_calculate_num_voltages(struct spmi_voltage_set_points *points)
1248 {
1249         unsigned int n;
1250         struct spmi_voltage_range *range = points->range;
1251
1252         for (; range < points->range + points->count; range++) {
1253                 n = 0;
1254                 if (range->set_point_max_uV) {
1255                         n = range->set_point_max_uV - range->set_point_min_uV;
1256                         n = (n / range->step_uV) + 1;
1257                 }
1258                 range->n_voltages = n;
1259                 points->n_voltages += n;
1260         }
1261 }
1262
1263 static int spmi_regulator_match(struct spmi_regulator *vreg, u16 force_type)
1264 {
1265         const struct spmi_regulator_mapping *mapping;
1266         int ret, i;
1267         u32 dig_major_rev;
1268         u8 version[SPMI_COMMON_REG_SUBTYPE - SPMI_COMMON_REG_DIG_MAJOR_REV + 1];
1269         u8 type, subtype;
1270
1271         ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_DIG_MAJOR_REV, version,
1272                 ARRAY_SIZE(version));
1273         if (ret) {
1274                 dev_dbg(vreg->dev, "could not read version registers\n");
1275                 return ret;
1276         }
1277         dig_major_rev   = version[SPMI_COMMON_REG_DIG_MAJOR_REV
1278                                         - SPMI_COMMON_REG_DIG_MAJOR_REV];
1279         if (!force_type) {
1280                 type            = version[SPMI_COMMON_REG_TYPE -
1281                                           SPMI_COMMON_REG_DIG_MAJOR_REV];
1282                 subtype         = version[SPMI_COMMON_REG_SUBTYPE -
1283                                           SPMI_COMMON_REG_DIG_MAJOR_REV];
1284         } else {
1285                 type = force_type >> 8;
1286                 subtype = force_type;
1287         }
1288
1289         for (i = 0; i < ARRAY_SIZE(supported_regulators); i++) {
1290                 mapping = &supported_regulators[i];
1291                 if (mapping->type == type && mapping->subtype == subtype
1292                     && mapping->revision_min <= dig_major_rev
1293                     && mapping->revision_max >= dig_major_rev)
1294                         goto found;
1295         }
1296
1297         dev_err(vreg->dev,
1298                 "unsupported regulator: name=%s type=0x%02X, subtype=0x%02X, dig major rev=0x%02X\n",
1299                 vreg->desc.name, type, subtype, dig_major_rev);
1300
1301         return -ENODEV;
1302
1303 found:
1304         vreg->logical_type      = mapping->logical_type;
1305         vreg->set_points        = mapping->set_points;
1306         vreg->hpm_min_load      = mapping->hpm_min_load;
1307         vreg->desc.ops          = mapping->ops;
1308
1309         if (mapping->set_points) {
1310                 if (!mapping->set_points->n_voltages)
1311                         spmi_calculate_num_voltages(mapping->set_points);
1312                 vreg->desc.n_voltages = mapping->set_points->n_voltages;
1313         }
1314
1315         return 0;
1316 }
1317
1318 static int spmi_regulator_init_slew_rate(struct spmi_regulator *vreg)
1319 {
1320         int ret;
1321         u8 reg = 0;
1322         int step, delay, slew_rate, step_delay;
1323         const struct spmi_voltage_range *range;
1324
1325         ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_STEP_CTRL, &reg, 1);
1326         if (ret) {
1327                 dev_err(vreg->dev, "spmi read failed, ret=%d\n", ret);
1328                 return ret;
1329         }
1330
1331         range = spmi_regulator_find_range(vreg);
1332         if (!range)
1333                 return -EINVAL;
1334
1335         switch (vreg->logical_type) {
1336         case SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS:
1337                 step_delay = SPMI_FTSMPS_STEP_DELAY;
1338                 break;
1339         default:
1340                 step_delay = SPMI_DEFAULT_STEP_DELAY;
1341                 break;
1342         }
1343
1344         step = reg & SPMI_FTSMPS_STEP_CTRL_STEP_MASK;
1345         step >>= SPMI_FTSMPS_STEP_CTRL_STEP_SHIFT;
1346
1347         delay = reg & SPMI_FTSMPS_STEP_CTRL_DELAY_MASK;
1348         delay >>= SPMI_FTSMPS_STEP_CTRL_DELAY_SHIFT;
1349
1350         /* slew_rate has units of uV/us */
1351         slew_rate = SPMI_FTSMPS_CLOCK_RATE * range->step_uV * (1 << step);
1352         slew_rate /= 1000 * (step_delay << delay);
1353         slew_rate *= SPMI_FTSMPS_STEP_MARGIN_NUM;
1354         slew_rate /= SPMI_FTSMPS_STEP_MARGIN_DEN;
1355
1356         /* Ensure that the slew rate is greater than 0 */
1357         vreg->slew_rate = max(slew_rate, 1);
1358
1359         return ret;
1360 }
1361
1362 static int spmi_regulator_init_registers(struct spmi_regulator *vreg,
1363                                 const struct spmi_regulator_init_data *data)
1364 {
1365         int ret;
1366         enum spmi_regulator_logical_type type;
1367         u8 ctrl_reg[8], reg, mask;
1368
1369         type = vreg->logical_type;
1370
1371         ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, ctrl_reg, 8);
1372         if (ret)
1373                 return ret;
1374
1375         /* Set up enable pin control. */
1376         if ((type == SPMI_REGULATOR_LOGICAL_TYPE_SMPS
1377              || type == SPMI_REGULATOR_LOGICAL_TYPE_LDO
1378              || type == SPMI_REGULATOR_LOGICAL_TYPE_VS)
1379             && !(data->pin_ctrl_enable
1380                         & SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT)) {
1381                 ctrl_reg[SPMI_COMMON_IDX_ENABLE] &=
1382                         ~SPMI_COMMON_ENABLE_FOLLOW_ALL_MASK;
1383                 ctrl_reg[SPMI_COMMON_IDX_ENABLE] |=
1384                     data->pin_ctrl_enable & SPMI_COMMON_ENABLE_FOLLOW_ALL_MASK;
1385         }
1386
1387         /* Set up mode pin control. */
1388         if ((type == SPMI_REGULATOR_LOGICAL_TYPE_SMPS
1389             || type == SPMI_REGULATOR_LOGICAL_TYPE_LDO)
1390                 && !(data->pin_ctrl_hpm
1391                         & SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT)) {
1392                 ctrl_reg[SPMI_COMMON_IDX_MODE] &=
1393                         ~SPMI_COMMON_MODE_FOLLOW_ALL_MASK;
1394                 ctrl_reg[SPMI_COMMON_IDX_MODE] |=
1395                         data->pin_ctrl_hpm & SPMI_COMMON_MODE_FOLLOW_ALL_MASK;
1396         }
1397
1398         if (type == SPMI_REGULATOR_LOGICAL_TYPE_VS
1399            && !(data->pin_ctrl_hpm & SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT)) {
1400                 ctrl_reg[SPMI_COMMON_IDX_MODE] &=
1401                         ~SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK;
1402                 ctrl_reg[SPMI_COMMON_IDX_MODE] |=
1403                        data->pin_ctrl_hpm & SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK;
1404         }
1405
1406         if ((type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS
1407                 || type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS
1408                 || type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO)
1409                 && !(data->pin_ctrl_hpm
1410                         & SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT)) {
1411                 ctrl_reg[SPMI_COMMON_IDX_MODE] &=
1412                         ~SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK;
1413                 ctrl_reg[SPMI_COMMON_IDX_MODE] |=
1414                        data->pin_ctrl_hpm & SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK;
1415         }
1416
1417         /* Write back any control register values that were modified. */
1418         ret = spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, ctrl_reg, 8);
1419         if (ret)
1420                 return ret;
1421
1422         /* Set soft start strength and over current protection for VS. */
1423         if (type == SPMI_REGULATOR_LOGICAL_TYPE_VS) {
1424                 if (data->vs_soft_start_strength
1425                                 != SPMI_VS_SOFT_START_STR_HW_DEFAULT) {
1426                         reg = data->vs_soft_start_strength
1427                                 & SPMI_VS_SOFT_START_SEL_MASK;
1428                         mask = SPMI_VS_SOFT_START_SEL_MASK;
1429                         return spmi_vreg_update_bits(vreg,
1430                                                      SPMI_VS_REG_SOFT_START,
1431                                                      reg, mask);
1432                 }
1433         }
1434
1435         return 0;
1436 }
1437
1438 static void spmi_regulator_get_dt_config(struct spmi_regulator *vreg,
1439                 struct device_node *node, struct spmi_regulator_init_data *data)
1440 {
1441         /*
1442          * Initialize configuration parameters to use hardware default in case
1443          * no value is specified via device tree.
1444          */
1445         data->pin_ctrl_enable       = SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT;
1446         data->pin_ctrl_hpm          = SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT;
1447         data->vs_soft_start_strength    = SPMI_VS_SOFT_START_STR_HW_DEFAULT;
1448
1449         /* These bindings are optional, so it is okay if they aren't found. */
1450         of_property_read_u32(node, "qcom,ocp-max-retries",
1451                 &vreg->ocp_max_retries);
1452         of_property_read_u32(node, "qcom,ocp-retry-delay",
1453                 &vreg->ocp_retry_delay_ms);
1454         of_property_read_u32(node, "qcom,pin-ctrl-enable",
1455                 &data->pin_ctrl_enable);
1456         of_property_read_u32(node, "qcom,pin-ctrl-hpm", &data->pin_ctrl_hpm);
1457         of_property_read_u32(node, "qcom,vs-soft-start-strength",
1458                 &data->vs_soft_start_strength);
1459 }
1460
1461 static unsigned int spmi_regulator_of_map_mode(unsigned int mode)
1462 {
1463         if (mode == 1)
1464                 return REGULATOR_MODE_NORMAL;
1465         if (mode == 2)
1466                 return REGULATOR_MODE_FAST;
1467
1468         return REGULATOR_MODE_IDLE;
1469 }
1470
1471 static int spmi_regulator_of_parse(struct device_node *node,
1472                             const struct regulator_desc *desc,
1473                             struct regulator_config *config)
1474 {
1475         struct spmi_regulator_init_data data = { };
1476         struct spmi_regulator *vreg = config->driver_data;
1477         struct device *dev = config->dev;
1478         int ret;
1479
1480         spmi_regulator_get_dt_config(vreg, node, &data);
1481
1482         if (!vreg->ocp_max_retries)
1483                 vreg->ocp_max_retries = SPMI_VS_OCP_DEFAULT_MAX_RETRIES;
1484         if (!vreg->ocp_retry_delay_ms)
1485                 vreg->ocp_retry_delay_ms = SPMI_VS_OCP_DEFAULT_RETRY_DELAY_MS;
1486
1487         ret = spmi_regulator_init_registers(vreg, &data);
1488         if (ret) {
1489                 dev_err(dev, "common initialization failed, ret=%d\n", ret);
1490                 return ret;
1491         }
1492
1493         switch (vreg->logical_type) {
1494         case SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS:
1495         case SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS:
1496         case SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS:
1497         case SPMI_REGULATOR_LOGICAL_TYPE_SMPS:
1498                 ret = spmi_regulator_init_slew_rate(vreg);
1499                 if (ret)
1500                         return ret;
1501         default:
1502                 break;
1503         }
1504
1505         if (vreg->logical_type != SPMI_REGULATOR_LOGICAL_TYPE_VS)
1506                 vreg->ocp_irq = 0;
1507
1508         if (vreg->ocp_irq) {
1509                 ret = devm_request_irq(dev, vreg->ocp_irq,
1510                         spmi_regulator_vs_ocp_isr, IRQF_TRIGGER_RISING, "ocp",
1511                         vreg);
1512                 if (ret < 0) {
1513                         dev_err(dev, "failed to request irq %d, ret=%d\n",
1514                                 vreg->ocp_irq, ret);
1515                         return ret;
1516                 }
1517
1518                 INIT_DELAYED_WORK(&vreg->ocp_work, spmi_regulator_vs_ocp_work);
1519         }
1520
1521         return 0;
1522 }
1523
1524 static const struct spmi_regulator_data pm8941_regulators[] = {
1525         { "s1", 0x1400, "vdd_s1", },
1526         { "s2", 0x1700, "vdd_s2", },
1527         { "s3", 0x1a00, "vdd_s3", },
1528         { "s4", 0xa000, },
1529         { "l1", 0x4000, "vdd_l1_l3", },
1530         { "l2", 0x4100, "vdd_l2_lvs_1_2_3", },
1531         { "l3", 0x4200, "vdd_l1_l3", },
1532         { "l4", 0x4300, "vdd_l4_l11", },
1533         { "l5", 0x4400, "vdd_l5_l7", NULL, 0x0410 },
1534         { "l6", 0x4500, "vdd_l6_l12_l14_l15", },
1535         { "l7", 0x4600, "vdd_l5_l7", NULL, 0x0410 },
1536         { "l8", 0x4700, "vdd_l8_l16_l18_19", },
1537         { "l9", 0x4800, "vdd_l9_l10_l17_l22", },
1538         { "l10", 0x4900, "vdd_l9_l10_l17_l22", },
1539         { "l11", 0x4a00, "vdd_l4_l11", },
1540         { "l12", 0x4b00, "vdd_l6_l12_l14_l15", },
1541         { "l13", 0x4c00, "vdd_l13_l20_l23_l24", },
1542         { "l14", 0x4d00, "vdd_l6_l12_l14_l15", },
1543         { "l15", 0x4e00, "vdd_l6_l12_l14_l15", },
1544         { "l16", 0x4f00, "vdd_l8_l16_l18_19", },
1545         { "l17", 0x5000, "vdd_l9_l10_l17_l22", },
1546         { "l18", 0x5100, "vdd_l8_l16_l18_19", },
1547         { "l19", 0x5200, "vdd_l8_l16_l18_19", },
1548         { "l20", 0x5300, "vdd_l13_l20_l23_l24", },
1549         { "l21", 0x5400, "vdd_l21", },
1550         { "l22", 0x5500, "vdd_l9_l10_l17_l22", },
1551         { "l23", 0x5600, "vdd_l13_l20_l23_l24", },
1552         { "l24", 0x5700, "vdd_l13_l20_l23_l24", },
1553         { "lvs1", 0x8000, "vdd_l2_lvs_1_2_3", },
1554         { "lvs2", 0x8100, "vdd_l2_lvs_1_2_3", },
1555         { "lvs3", 0x8200, "vdd_l2_lvs_1_2_3", },
1556         { "5vs1", 0x8300, "vin_5vs", "ocp-5vs1", },
1557         { "5vs2", 0x8400, "vin_5vs", "ocp-5vs2", },
1558         { }
1559 };
1560
1561 static const struct spmi_regulator_data pm8841_regulators[] = {
1562         { "s1", 0x1400, "vdd_s1", },
1563         { "s2", 0x1700, "vdd_s2", NULL, 0x1c08 },
1564         { "s3", 0x1a00, "vdd_s3", },
1565         { "s4", 0x1d00, "vdd_s4", NULL, 0x1c08 },
1566         { "s5", 0x2000, "vdd_s5", NULL, 0x1c08 },
1567         { "s6", 0x2300, "vdd_s6", NULL, 0x1c08 },
1568         { "s7", 0x2600, "vdd_s7", NULL, 0x1c08 },
1569         { "s8", 0x2900, "vdd_s8", NULL, 0x1c08 },
1570         { }
1571 };
1572
1573 static const struct spmi_regulator_data pm8916_regulators[] = {
1574         { "s1", 0x1400, "vdd_s1", },
1575         { "s2", 0x1700, "vdd_s2", },
1576         { "s3", 0x1a00, "vdd_s3", },
1577         { "s4", 0x1d00, "vdd_s4", },
1578         { "l1", 0x4000, "vdd_l1_l3", },
1579         { "l2", 0x4100, "vdd_l2", },
1580         { "l3", 0x4200, "vdd_l1_l3", },
1581         { "l4", 0x4300, "vdd_l4_l5_l6", },
1582         { "l5", 0x4400, "vdd_l4_l5_l6", },
1583         { "l6", 0x4500, "vdd_l4_l5_l6", },
1584         { "l7", 0x4600, "vdd_l7", },
1585         { "l8", 0x4700, "vdd_l8_l11_l14_l15_l16", },
1586         { "l9", 0x4800, "vdd_l9_l10_l12_l13_l17_l18", },
1587         { "l10", 0x4900, "vdd_l9_l10_l12_l13_l17_l18", },
1588         { "l11", 0x4a00, "vdd_l8_l11_l14_l15_l16", },
1589         { "l12", 0x4b00, "vdd_l9_l10_l12_l13_l17_l18", },
1590         { "l13", 0x4c00, "vdd_l9_l10_l12_l13_l17_l18", },
1591         { "l14", 0x4d00, "vdd_l8_l11_l14_l15_l16", },
1592         { "l15", 0x4e00, "vdd_l8_l11_l14_l15_l16", },
1593         { "l16", 0x4f00, "vdd_l8_l11_l14_l15_l16", },
1594         { "l17", 0x5000, "vdd_l9_l10_l12_l13_l17_l18", },
1595         { "l18", 0x5100, "vdd_l9_l10_l12_l13_l17_l18", },
1596         { }
1597 };
1598
1599 static const struct spmi_regulator_data pm8994_regulators[] = {
1600         { "s1", 0x1400, "vdd_s1", },
1601         { "s2", 0x1700, "vdd_s2", },
1602         { "s3", 0x1a00, "vdd_s3", },
1603         { "s4", 0x1d00, "vdd_s4", },
1604         { "s5", 0x2000, "vdd_s5", },
1605         { "s6", 0x2300, "vdd_s6", },
1606         { "s7", 0x2600, "vdd_s7", },
1607         { "s8", 0x2900, "vdd_s8", },
1608         { "s9", 0x2c00, "vdd_s9", },
1609         { "s10", 0x2f00, "vdd_s10", },
1610         { "s11", 0x3200, "vdd_s11", },
1611         { "s12", 0x3500, "vdd_s12", },
1612         { "l1", 0x4000, "vdd_l1", },
1613         { "l2", 0x4100, "vdd_l2_l26_l28", },
1614         { "l3", 0x4200, "vdd_l3_l11", },
1615         { "l4", 0x4300, "vdd_l4_l27_l31", },
1616         { "l5", 0x4400, "vdd_l5_l7", },
1617         { "l6", 0x4500, "vdd_l6_l12_l32", },
1618         { "l7", 0x4600, "vdd_l5_l7", },
1619         { "l8", 0x4700, "vdd_l8_l16_l30", },
1620         { "l9", 0x4800, "vdd_l9_l10_l18_l22", },
1621         { "l10", 0x4900, "vdd_l9_l10_l18_l22", },
1622         { "l11", 0x4a00, "vdd_l3_l11", },
1623         { "l12", 0x4b00, "vdd_l6_l12_l32", },
1624         { "l13", 0x4c00, "vdd_l13_l19_l23_l24", },
1625         { "l14", 0x4d00, "vdd_l14_l15", },
1626         { "l15", 0x4e00, "vdd_l14_l15", },
1627         { "l16", 0x4f00, "vdd_l8_l16_l30", },
1628         { "l17", 0x5000, "vdd_l17_l29", },
1629         { "l18", 0x5100, "vdd_l9_l10_l18_l22", },
1630         { "l19", 0x5200, "vdd_l13_l19_l23_l24", },
1631         { "l20", 0x5300, "vdd_l20_l21", },
1632         { "l21", 0x5400, "vdd_l20_l21", },
1633         { "l22", 0x5500, "vdd_l9_l10_l18_l22", },
1634         { "l23", 0x5600, "vdd_l13_l19_l23_l24", },
1635         { "l24", 0x5700, "vdd_l13_l19_l23_l24", },
1636         { "l25", 0x5800, "vdd_l25", },
1637         { "l26", 0x5900, "vdd_l2_l26_l28", },
1638         { "l27", 0x5a00, "vdd_l4_l27_l31", },
1639         { "l28", 0x5b00, "vdd_l2_l26_l28", },
1640         { "l29", 0x5c00, "vdd_l17_l29", },
1641         { "l30", 0x5d00, "vdd_l8_l16_l30", },
1642         { "l31", 0x5e00, "vdd_l4_l27_l31", },
1643         { "l32", 0x5f00, "vdd_l6_l12_l32", },
1644         { "lvs1", 0x8000, "vdd_lvs_1_2", },
1645         { "lvs2", 0x8100, "vdd_lvs_1_2", },
1646         { }
1647 };
1648
1649 static const struct spmi_regulator_data pmi8994_regulators[] = {
1650         { "s1", 0x1400, "vdd_s1", },
1651         { "s2", 0x1700, "vdd_s2", },
1652         { "s3", 0x1a00, "vdd_s3", },
1653         { "l1", 0x4000, "vdd_l1", },
1654         { }
1655 };
1656
1657 static const struct of_device_id qcom_spmi_regulator_match[] = {
1658         { .compatible = "qcom,pm8841-regulators", .data = &pm8841_regulators },
1659         { .compatible = "qcom,pm8916-regulators", .data = &pm8916_regulators },
1660         { .compatible = "qcom,pm8941-regulators", .data = &pm8941_regulators },
1661         { .compatible = "qcom,pm8994-regulators", .data = &pm8994_regulators },
1662         { .compatible = "qcom,pmi8994-regulators", .data = &pmi8994_regulators },
1663         { }
1664 };
1665 MODULE_DEVICE_TABLE(of, qcom_spmi_regulator_match);
1666
1667 static int qcom_spmi_regulator_probe(struct platform_device *pdev)
1668 {
1669         const struct spmi_regulator_data *reg;
1670         const struct of_device_id *match;
1671         struct regulator_config config = { };
1672         struct regulator_dev *rdev;
1673         struct spmi_regulator *vreg;
1674         struct regmap *regmap;
1675         const char *name;
1676         struct device *dev = &pdev->dev;
1677         int ret;
1678         struct list_head *vreg_list;
1679
1680         vreg_list = devm_kzalloc(dev, sizeof(*vreg_list), GFP_KERNEL);
1681         if (!vreg_list)
1682                 return -ENOMEM;
1683         INIT_LIST_HEAD(vreg_list);
1684         platform_set_drvdata(pdev, vreg_list);
1685
1686         regmap = dev_get_regmap(dev->parent, NULL);
1687         if (!regmap)
1688                 return -ENODEV;
1689
1690         match = of_match_device(qcom_spmi_regulator_match, &pdev->dev);
1691         if (!match)
1692                 return -ENODEV;
1693
1694         for (reg = match->data; reg->name; reg++) {
1695                 vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL);
1696                 if (!vreg)
1697                         return -ENOMEM;
1698
1699                 vreg->dev = dev;
1700                 vreg->base = reg->base;
1701                 vreg->regmap = regmap;
1702
1703                 if (reg->ocp) {
1704                         vreg->ocp_irq = platform_get_irq_byname(pdev, reg->ocp);
1705                         if (vreg->ocp_irq < 0) {
1706                                 ret = vreg->ocp_irq;
1707                                 goto err;
1708                         }
1709                 }
1710
1711                 vreg->desc.id = -1;
1712                 vreg->desc.owner = THIS_MODULE;
1713                 vreg->desc.type = REGULATOR_VOLTAGE;
1714                 vreg->desc.name = name = reg->name;
1715                 vreg->desc.supply_name = reg->supply;
1716                 vreg->desc.of_match = reg->name;
1717                 vreg->desc.of_parse_cb = spmi_regulator_of_parse;
1718                 vreg->desc.of_map_mode = spmi_regulator_of_map_mode;
1719
1720                 ret = spmi_regulator_match(vreg, reg->force_type);
1721                 if (ret)
1722                         continue;
1723
1724                 config.dev = dev;
1725                 config.driver_data = vreg;
1726                 rdev = devm_regulator_register(dev, &vreg->desc, &config);
1727                 if (IS_ERR(rdev)) {
1728                         dev_err(dev, "failed to register %s\n", name);
1729                         ret = PTR_ERR(rdev);
1730                         goto err;
1731                 }
1732
1733                 INIT_LIST_HEAD(&vreg->node);
1734                 list_add(&vreg->node, vreg_list);
1735         }
1736
1737         return 0;
1738
1739 err:
1740         list_for_each_entry(vreg, vreg_list, node)
1741                 if (vreg->ocp_irq)
1742                         cancel_delayed_work_sync(&vreg->ocp_work);
1743         return ret;
1744 }
1745
1746 static int qcom_spmi_regulator_remove(struct platform_device *pdev)
1747 {
1748         struct spmi_regulator *vreg;
1749         struct list_head *vreg_list = platform_get_drvdata(pdev);
1750
1751         list_for_each_entry(vreg, vreg_list, node)
1752                 if (vreg->ocp_irq)
1753                         cancel_delayed_work_sync(&vreg->ocp_work);
1754
1755         return 0;
1756 }
1757
1758 static struct platform_driver qcom_spmi_regulator_driver = {
1759         .driver         = {
1760                 .name   = "qcom-spmi-regulator",
1761                 .of_match_table = qcom_spmi_regulator_match,
1762         },
1763         .probe          = qcom_spmi_regulator_probe,
1764         .remove         = qcom_spmi_regulator_remove,
1765 };
1766 module_platform_driver(qcom_spmi_regulator_driver);
1767
1768 MODULE_DESCRIPTION("Qualcomm SPMI PMIC regulator driver");
1769 MODULE_LICENSE("GPL v2");
1770 MODULE_ALIAS("platform:qcom-spmi-regulator");