drivers/regulator/axp20x-regulator.c

   1 /*
   2  * AXP20x regulators driver.
   3  *
   4  * Copyright (C) 2013 Carlo Caione <carlo@caione.org>
   5  *
   6  * This file is subject to the terms and conditions of the GNU General
   7  * Public License. See the file "COPYING" in the main directory of this
   8  * archive for more details.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <linux/err.h>
  17 #include <linux/init.h>
  18 #include <linux/module.h>
  19 #include <linux/of.h>
  20 #include <linux/of_device.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/regmap.h>
  23 #include <linux/mfd/axp20x.h>
  24 #include <linux/regulator/driver.h>
  25 #include <linux/regulator/of_regulator.h>
  26
  27 #define AXP20X_IO_ENABLED               0x03
  28 #define AXP20X_IO_DISABLED              0x07
  29
  30 #define AXP22X_IO_ENABLED               0x03
  31 #define AXP22X_IO_DISABLED              0x04
  32
  33 #define AXP20X_WORKMODE_DCDC2_MASK      BIT(2)
  34 #define AXP20X_WORKMODE_DCDC3_MASK      BIT(1)
  35 #define AXP22X_WORKMODE_DCDCX_MASK(x)   BIT(x)
  36
  37 #define AXP20X_FREQ_DCDC_MASK           0x0f
  38
  39 #define AXP22X_MISC_N_VBUSEN_FUNC       BIT(4)
  40
  41 #define AXP_DESC_IO(_family, _id, _match, _supply, _min, _max, _step, _vreg,    \
  42                     _vmask, _ereg, _emask, _enable_val, _disable_val)           \
  43         [_family##_##_id] = {                                                   \
  44                 .name           = (_match),                                     \
  45                 .supply_name    = (_supply),                                    \
  46                 .of_match       = of_match_ptr(_match),                         \
  47                 .regulators_node = of_match_ptr("regulators"),                  \
  48                 .type           = REGULATOR_VOLTAGE,                            \
  49                 .id             = _family##_##_id,                              \
  50                 .n_voltages     = (((_max) - (_min)) / (_step) + 1),            \
  51                 .owner          = THIS_MODULE,                                  \
  52                 .min_uV         = (_min) * 1000,                                \
  53                 .uV_step        = (_step) * 1000,                               \
  54                 .vsel_reg       = (_vreg),                                      \
  55                 .vsel_mask      = (_vmask),                                     \
  56                 .enable_reg     = (_ereg),                                      \
  57                 .enable_mask    = (_emask),                                     \
  58                 .enable_val     = (_enable_val),                                \
  59                 .disable_val    = (_disable_val),                               \
  60                 .ops            = &axp20x_ops,                                  \
  61         }
  62
  63 #define AXP_DESC(_family, _id, _match, _supply, _min, _max, _step, _vreg,       \
  64                  _vmask, _ereg, _emask)                                         \
  65         [_family##_##_id] = {                                                   \
  66                 .name           = (_match),                                     \
  67                 .supply_name    = (_supply),                                    \
  68                 .of_match       = of_match_ptr(_match),                         \
  69                 .regulators_node = of_match_ptr("regulators"),                  \
  70                 .type           = REGULATOR_VOLTAGE,                            \
  71                 .id             = _family##_##_id,                              \
  72                 .n_voltages     = (((_max) - (_min)) / (_step) + 1),            \
  73                 .owner          = THIS_MODULE,                                  \
  74                 .min_uV         = (_min) * 1000,                                \
  75                 .uV_step        = (_step) * 1000,                               \
  76                 .vsel_reg       = (_vreg),                                      \
  77                 .vsel_mask      = (_vmask),                                     \
  78                 .enable_reg     = (_ereg),                                      \
  79                 .enable_mask    = (_emask),                                     \
  80                 .ops            = &axp20x_ops,                                  \
  81         }
  82
  83 #define AXP_DESC_SW(_family, _id, _match, _supply, _ereg, _emask)               \
  84         [_family##_##_id] = {                                                   \
  85                 .name           = (_match),                                     \
  86                 .supply_name    = (_supply),                                    \
  87                 .of_match       = of_match_ptr(_match),                         \
  88                 .regulators_node = of_match_ptr("regulators"),                  \
  89                 .type           = REGULATOR_VOLTAGE,                            \
  90                 .id             = _family##_##_id,                              \
  91                 .owner          = THIS_MODULE,                                  \
  92                 .enable_reg     = (_ereg),                                      \
  93                 .enable_mask    = (_emask),                                     \
  94                 .ops            = &axp20x_ops_sw,                               \
  95         }
  96
  97 #define AXP_DESC_FIXED(_family, _id, _match, _supply, _volt)                    \
  98         [_family##_##_id] = {                                                   \
  99                 .name           = (_match),                                     \
 100                 .supply_name    = (_supply),                                    \
 101                 .of_match       = of_match_ptr(_match),                         \
 102                 .regulators_node = of_match_ptr("regulators"),                  \
 103                 .type           = REGULATOR_VOLTAGE,                            \
 104                 .id             = _family##_##_id,                              \
 105                 .n_voltages     = 1,                                            \
 106                 .owner          = THIS_MODULE,                                  \
 107                 .min_uV         = (_volt) * 1000,                               \
 108                 .ops            = &axp20x_ops_fixed                             \
 109         }
 110
 111 #define AXP_DESC_RANGES(_family, _id, _match, _supply, _ranges, _n_voltages,    \
 112                         _vreg, _vmask, _ereg, _emask)                           \
 113         [_family##_##_id] = {                                                   \
 114                 .name           = (_match),                                     \
 115                 .supply_name    = (_supply),                                    \
 116                 .of_match       = of_match_ptr(_match),                         \
 117                 .regulators_node = of_match_ptr("regulators"),                  \
 118                 .type           = REGULATOR_VOLTAGE,                            \
 119                 .id             = _family##_##_id,                              \
 120                 .n_voltages     = (_n_voltages),                                \
 121                 .owner          = THIS_MODULE,                                  \
 122                 .vsel_reg       = (_vreg),                                      \
 123                 .vsel_mask      = (_vmask),                                     \
 124                 .enable_reg     = (_ereg),                                      \
 125                 .enable_mask    = (_emask),                                     \
 126                 .linear_ranges  = (_ranges),                                    \
 127                 .n_linear_ranges = ARRAY_SIZE(_ranges),                         \
 128                 .ops            = &axp20x_ops_range,                            \
 129         }
 130
 131 static const struct regulator_ops axp20x_ops_fixed = {
 132         .list_voltage           = regulator_list_voltage_linear,
 133 };
 134
 135 static const struct regulator_ops axp20x_ops_range = {
 136         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 137         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 138         .list_voltage           = regulator_list_voltage_linear_range,
 139         .enable                 = regulator_enable_regmap,
 140         .disable                = regulator_disable_regmap,
 141         .is_enabled             = regulator_is_enabled_regmap,
 142 };
 143
 144 static const struct regulator_ops axp20x_ops = {
 145         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 146         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 147         .list_voltage           = regulator_list_voltage_linear,
 148         .enable                 = regulator_enable_regmap,
 149         .disable                = regulator_disable_regmap,
 150         .is_enabled             = regulator_is_enabled_regmap,
 151 };
 152
 153 static const struct regulator_ops axp20x_ops_sw = {
 154         .enable                 = regulator_enable_regmap,
 155         .disable                = regulator_disable_regmap,
 156         .is_enabled             = regulator_is_enabled_regmap,
 157 };
 158
 159 static const struct regulator_linear_range axp20x_ldo4_ranges[] = {
 160         REGULATOR_LINEAR_RANGE(1250000, 0x0, 0x0, 0),
 161         REGULATOR_LINEAR_RANGE(1300000, 0x1, 0x8, 100000),
 162         REGULATOR_LINEAR_RANGE(2500000, 0x9, 0x9, 0),
 163         REGULATOR_LINEAR_RANGE(2700000, 0xa, 0xb, 100000),
 164         REGULATOR_LINEAR_RANGE(3000000, 0xc, 0xf, 100000),
 165 };
 166
 167 static const struct regulator_desc axp20x_regulators[] = {
 168         AXP_DESC(AXP20X, DCDC2, "dcdc2", "vin2", 700, 2275, 25,
 169                  AXP20X_DCDC2_V_OUT, 0x3f, AXP20X_PWR_OUT_CTRL, 0x10),
 170         AXP_DESC(AXP20X, DCDC3, "dcdc3", "vin3", 700, 3500, 25,
 171                  AXP20X_DCDC3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x02),
 172         AXP_DESC_FIXED(AXP20X, LDO1, "ldo1", "acin", 1300),
 173         AXP_DESC(AXP20X, LDO2, "ldo2", "ldo24in", 1800, 3300, 100,
 174                  AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04),
 175         AXP_DESC(AXP20X, LDO3, "ldo3", "ldo3in", 700, 3500, 25,
 176                  AXP20X_LDO3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x40),
 177         AXP_DESC_RANGES(AXP20X, LDO4, "ldo4", "ldo24in", axp20x_ldo4_ranges,
 178                         16, AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL,
 179                         0x08),
 180         AXP_DESC_IO(AXP20X, LDO5, "ldo5", "ldo5in", 1800, 3300, 100,
 181                     AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07,
 182                     AXP20X_IO_ENABLED, AXP20X_IO_DISABLED),
 183 };
 184
 185 static const struct regulator_desc axp22x_regulators[] = {
 186         AXP_DESC(AXP22X, DCDC1, "dcdc1", "vin1", 1600, 3400, 100,
 187                  AXP22X_DCDC1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(1)),
 188         AXP_DESC(AXP22X, DCDC2, "dcdc2", "vin2", 600, 1540, 20,
 189                  AXP22X_DCDC2_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(2)),
 190         AXP_DESC(AXP22X, DCDC3, "dcdc3", "vin3", 600, 1860, 20,
 191                  AXP22X_DCDC3_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(3)),
 192         AXP_DESC(AXP22X, DCDC4, "dcdc4", "vin4", 600, 1540, 20,
 193                  AXP22X_DCDC4_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(4)),
 194         AXP_DESC(AXP22X, DCDC5, "dcdc5", "vin5", 1000, 2550, 50,
 195                  AXP22X_DCDC5_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(5)),
 196         /* secondary switchable output of DCDC1 */
 197         AXP_DESC_SW(AXP22X, DC1SW, "dc1sw", NULL, AXP22X_PWR_OUT_CTRL2,
 198                     BIT(7)),
 199         /* LDO regulator internally chained to DCDC5 */
 200         AXP_DESC(AXP22X, DC5LDO, "dc5ldo", NULL, 700, 1400, 100,
 201                  AXP22X_DC5LDO_V_OUT, 0x7, AXP22X_PWR_OUT_CTRL1, BIT(0)),
 202         AXP_DESC(AXP22X, ALDO1, "aldo1", "aldoin", 700, 3300, 100,
 203                  AXP22X_ALDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(6)),
 204         AXP_DESC(AXP22X, ALDO2, "aldo2", "aldoin", 700, 3300, 100,
 205                  AXP22X_ALDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(7)),
 206         AXP_DESC(AXP22X, ALDO3, "aldo3", "aldoin", 700, 3300, 100,
 207                  AXP22X_ALDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL3, BIT(7)),
 208         AXP_DESC(AXP22X, DLDO1, "dldo1", "dldoin", 700, 3300, 100,
 209                  AXP22X_DLDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(3)),
 210         AXP_DESC(AXP22X, DLDO2, "dldo2", "dldoin", 700, 3300, 100,
 211                  AXP22X_DLDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(4)),
 212         AXP_DESC(AXP22X, DLDO3, "dldo3", "dldoin", 700, 3300, 100,
 213                  AXP22X_DLDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(5)),
 214         AXP_DESC(AXP22X, DLDO4, "dldo4", "dldoin", 700, 3300, 100,
 215                  AXP22X_DLDO4_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(6)),
 216         AXP_DESC(AXP22X, ELDO1, "eldo1", "eldoin", 700, 3300, 100,
 217                  AXP22X_ELDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(0)),
 218         AXP_DESC(AXP22X, ELDO2, "eldo2", "eldoin", 700, 3300, 100,
 219                  AXP22X_ELDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(1)),
 220         AXP_DESC(AXP22X, ELDO3, "eldo3", "eldoin", 700, 3300, 100,
 221                  AXP22X_ELDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(2)),
 222         /* Note the datasheet only guarantees reliable operation up to
 223          * 3.3V, this needs to be enforced via dts provided constraints */
 224         AXP_DESC_IO(AXP22X, LDO_IO0, "ldo_io0", "ips", 700, 3800, 100,
 225                     AXP22X_LDO_IO0_V_OUT, 0x1f, AXP20X_GPIO0_CTRL, 0x07,
 226                     AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
 227         /* Note the datasheet only guarantees reliable operation up to
 228          * 3.3V, this needs to be enforced via dts provided constraints */
 229         AXP_DESC_IO(AXP22X, LDO_IO1, "ldo_io1", "ips", 700, 3800, 100,
 230                     AXP22X_LDO_IO1_V_OUT, 0x1f, AXP20X_GPIO1_CTRL, 0x07,
 231                     AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
 232         AXP_DESC_FIXED(AXP22X, RTC_LDO, "rtc_ldo", "ips", 3000),
 233 };
 234
 235 static const struct regulator_desc axp22x_drivevbus_regulator = {
 236         .name           = "drivevbus",
 237         .supply_name    = "drivevbus",
 238         .of_match       = of_match_ptr("drivevbus"),
 239         .regulators_node = of_match_ptr("regulators"),
 240         .type           = REGULATOR_VOLTAGE,
 241         .owner          = THIS_MODULE,
 242         .enable_reg     = AXP20X_VBUS_IPSOUT_MGMT,
 243         .enable_mask    = BIT(2),
 244         .ops            = &axp20x_ops_sw,
 245 };
 246
 247 /* DCDC ranges shared with AXP813 */
 248 static const struct regulator_linear_range axp803_dcdc234_ranges[] = {
 249         REGULATOR_LINEAR_RANGE(500000, 0x0, 0x46, 10000),
 250         REGULATOR_LINEAR_RANGE(1220000, 0x47, 0x4b, 20000),
 251 };
 252
 253 static const struct regulator_linear_range axp803_dcdc5_ranges[] = {
 254         REGULATOR_LINEAR_RANGE(800000, 0x0, 0x20, 10000),
 255         REGULATOR_LINEAR_RANGE(1140000, 0x21, 0x44, 20000),
 256 };
 257
 258 static const struct regulator_linear_range axp803_dcdc6_ranges[] = {
 259         REGULATOR_LINEAR_RANGE(600000, 0x0, 0x32, 10000),
 260         REGULATOR_LINEAR_RANGE(1120000, 0x33, 0x47, 20000),
 261 };
 262
 263 /* AXP806's CLDO2 and AXP809's DLDO1 shares the same range */
 264 static const struct regulator_linear_range axp803_dldo2_ranges[] = {
 265         REGULATOR_LINEAR_RANGE(700000, 0x0, 0x1a, 100000),
 266         REGULATOR_LINEAR_RANGE(3400000, 0x1b, 0x1f, 200000),
 267 };
 268
 269 static const struct regulator_desc axp803_regulators[] = {
 270         AXP_DESC(AXP803, DCDC1, "dcdc1", "vin1", 1600, 3400, 100,
 271                  AXP803_DCDC1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(0)),
 272         AXP_DESC_RANGES(AXP803, DCDC2, "dcdc2", "vin2", axp803_dcdc234_ranges,
 273                         76, AXP803_DCDC2_V_OUT, 0x7f, AXP22X_PWR_OUT_CTRL1,
 274                         BIT(1)),
 275         AXP_DESC_RANGES(AXP803, DCDC3, "dcdc3", "vin3", axp803_dcdc234_ranges,
 276                         76, AXP803_DCDC3_V_OUT, 0x7f, AXP22X_PWR_OUT_CTRL1,
 277                         BIT(2)),
 278         AXP_DESC_RANGES(AXP803, DCDC4, "dcdc4", "vin4", axp803_dcdc234_ranges,
 279                         76, AXP803_DCDC4_V_OUT, 0x7f, AXP22X_PWR_OUT_CTRL1,
 280                         BIT(3)),
 281         AXP_DESC_RANGES(AXP803, DCDC5, "dcdc5", "vin5", axp803_dcdc5_ranges,
 282                         68, AXP803_DCDC5_V_OUT, 0x7f, AXP22X_PWR_OUT_CTRL1,
 283                         BIT(4)),
 284         AXP_DESC_RANGES(AXP803, DCDC6, "dcdc6", "vin6", axp803_dcdc6_ranges,
 285                         72, AXP803_DCDC6_V_OUT, 0x7f, AXP22X_PWR_OUT_CTRL1,
 286                         BIT(5)),
 287         /* secondary switchable output of DCDC1 */
 288         AXP_DESC_SW(AXP803, DC1SW, "dc1sw", NULL, AXP22X_PWR_OUT_CTRL2,
 289                     BIT(7)),
 290         AXP_DESC(AXP803, ALDO1, "aldo1", "aldoin", 700, 3300, 100,
 291                  AXP22X_ALDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL3, BIT(5)),
 292         AXP_DESC(AXP803, ALDO2, "aldo2", "aldoin", 700, 3300, 100,
 293                  AXP22X_ALDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL3, BIT(6)),
 294         AXP_DESC(AXP803, ALDO3, "aldo3", "aldoin", 700, 3300, 100,
 295                  AXP22X_ALDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL3, BIT(7)),
 296         AXP_DESC(AXP803, DLDO1, "dldo1", "dldoin", 700, 3300, 100,
 297                  AXP22X_DLDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(3)),
 298         AXP_DESC_RANGES(AXP803, DLDO2, "dldo2", "dldoin", axp803_dldo2_ranges,
 299                         32, AXP22X_DLDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2,
 300                         BIT(4)),
 301         AXP_DESC(AXP803, DLDO3, "dldo3", "dldoin", 700, 3300, 100,
 302                  AXP22X_DLDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(5)),
 303         AXP_DESC(AXP803, DLDO4, "dldo4", "dldoin", 700, 3300, 100,
 304                  AXP22X_DLDO4_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(6)),
 305         AXP_DESC(AXP803, ELDO1, "eldo1", "eldoin", 700, 1900, 50,
 306                  AXP22X_ELDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(0)),
 307         AXP_DESC(AXP803, ELDO2, "eldo2", "eldoin", 700, 1900, 50,
 308                  AXP22X_ELDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(1)),
 309         AXP_DESC(AXP803, ELDO3, "eldo3", "eldoin", 700, 1900, 50,
 310                  AXP22X_ELDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(2)),
 311         AXP_DESC(AXP803, FLDO1, "fldo1", "fldoin", 700, 1450, 50,
 312                  AXP803_FLDO1_V_OUT, 0x0f, AXP22X_PWR_OUT_CTRL3, BIT(2)),
 313         AXP_DESC(AXP803, FLDO2, "fldo2", "fldoin", 700, 1450, 50,
 314                  AXP803_FLDO2_V_OUT, 0x0f, AXP22X_PWR_OUT_CTRL3, BIT(3)),
 315         AXP_DESC_IO(AXP803, LDO_IO0, "ldo-io0", "ips", 700, 3300, 100,
 316                     AXP22X_LDO_IO0_V_OUT, 0x1f, AXP20X_GPIO0_CTRL, 0x07,
 317                     AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
 318         AXP_DESC_IO(AXP803, LDO_IO1, "ldo-io1", "ips", 700, 3300, 100,
 319                     AXP22X_LDO_IO1_V_OUT, 0x1f, AXP20X_GPIO1_CTRL, 0x07,
 320                     AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
 321         AXP_DESC_FIXED(AXP803, RTC_LDO, "rtc-ldo", "ips", 3000),
 322 };
 323
 324 static const struct regulator_linear_range axp806_dcdca_ranges[] = {
 325         REGULATOR_LINEAR_RANGE(600000, 0x0, 0x32, 10000),
 326         REGULATOR_LINEAR_RANGE(1120000, 0x33, 0x47, 20000),
 327 };
 328
 329 static const struct regulator_linear_range axp806_dcdcd_ranges[] = {
 330         REGULATOR_LINEAR_RANGE(600000, 0x0, 0x2d, 20000),
 331         REGULATOR_LINEAR_RANGE(1600000, 0x2e, 0x3f, 100000),
 332 };
 333
 334 static const struct regulator_desc axp806_regulators[] = {
 335         AXP_DESC_RANGES(AXP806, DCDCA, "dcdca", "vina", axp806_dcdca_ranges,
 336                         72, AXP806_DCDCA_V_CTRL, 0x7f, AXP806_PWR_OUT_CTRL1,
 337                         BIT(0)),
 338         AXP_DESC(AXP806, DCDCB, "dcdcb", "vinb", 1000, 2550, 50,
 339                  AXP806_DCDCB_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL1, BIT(1)),
 340         AXP_DESC_RANGES(AXP806, DCDCC, "dcdcc", "vinc", axp806_dcdca_ranges,
 341                         72, AXP806_DCDCC_V_CTRL, 0x7f, AXP806_PWR_OUT_CTRL1,
 342                         BIT(2)),
 343         AXP_DESC_RANGES(AXP806, DCDCD, "dcdcd", "vind", axp806_dcdcd_ranges,
 344                         64, AXP806_DCDCD_V_CTRL, 0x3f, AXP806_PWR_OUT_CTRL1,
 345                         BIT(3)),
 346         AXP_DESC(AXP806, DCDCE, "dcdce", "vine", 1100, 3400, 100,
 347                  AXP806_DCDCE_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL1, BIT(4)),
 348         AXP_DESC(AXP806, ALDO1, "aldo1", "aldoin", 700, 3300, 100,
 349                  AXP806_ALDO1_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL1, BIT(5)),
 350         AXP_DESC(AXP806, ALDO2, "aldo2", "aldoin", 700, 3400, 100,
 351                  AXP806_ALDO2_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL1, BIT(6)),
 352         AXP_DESC(AXP806, ALDO3, "aldo3", "aldoin", 700, 3300, 100,
 353                  AXP806_ALDO3_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL1, BIT(7)),
 354         AXP_DESC(AXP806, BLDO1, "bldo1", "bldoin", 700, 1900, 100,
 355                  AXP806_BLDO1_V_CTRL, 0x0f, AXP806_PWR_OUT_CTRL2, BIT(0)),
 356         AXP_DESC(AXP806, BLDO2, "bldo2", "bldoin", 700, 1900, 100,
 357                  AXP806_BLDO2_V_CTRL, 0x0f, AXP806_PWR_OUT_CTRL2, BIT(1)),
 358         AXP_DESC(AXP806, BLDO3, "bldo3", "bldoin", 700, 1900, 100,
 359                  AXP806_BLDO3_V_CTRL, 0x0f, AXP806_PWR_OUT_CTRL2, BIT(2)),
 360         AXP_DESC(AXP806, BLDO4, "bldo4", "bldoin", 700, 1900, 100,
 361                  AXP806_BLDO4_V_CTRL, 0x0f, AXP806_PWR_OUT_CTRL2, BIT(3)),
 362         AXP_DESC(AXP806, CLDO1, "cldo1", "cldoin", 700, 3300, 100,
 363                  AXP806_CLDO1_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL2, BIT(4)),
 364         AXP_DESC_RANGES(AXP806, CLDO2, "cldo2", "cldoin", axp803_dldo2_ranges,
 365                         32, AXP806_CLDO2_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL2,
 366                         BIT(5)),
 367         AXP_DESC(AXP806, CLDO3, "cldo3", "cldoin", 700, 3300, 100,
 368                  AXP806_CLDO3_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL2, BIT(6)),
 369         AXP_DESC_SW(AXP806, SW, "sw", "swin", AXP806_PWR_OUT_CTRL2, BIT(7)),
 370 };
 371
 372 static const struct regulator_linear_range axp809_dcdc4_ranges[] = {
 373         REGULATOR_LINEAR_RANGE(600000, 0x0, 0x2f, 20000),
 374         REGULATOR_LINEAR_RANGE(1800000, 0x30, 0x38, 100000),
 375 };
 376
 377 static const struct regulator_desc axp809_regulators[] = {
 378         AXP_DESC(AXP809, DCDC1, "dcdc1", "vin1", 1600, 3400, 100,
 379                  AXP22X_DCDC1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(1)),
 380         AXP_DESC(AXP809, DCDC2, "dcdc2", "vin2", 600, 1540, 20,
 381                  AXP22X_DCDC2_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(2)),
 382         AXP_DESC(AXP809, DCDC3, "dcdc3", "vin3", 600, 1860, 20,
 383                  AXP22X_DCDC3_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(3)),
 384         AXP_DESC_RANGES(AXP809, DCDC4, "dcdc4", "vin4", axp809_dcdc4_ranges,
 385                         57, AXP22X_DCDC4_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1,
 386                         BIT(4)),
 387         AXP_DESC(AXP809, DCDC5, "dcdc5", "vin5", 1000, 2550, 50,
 388                  AXP22X_DCDC5_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(5)),
 389         /* secondary switchable output of DCDC1 */
 390         AXP_DESC_SW(AXP809, DC1SW, "dc1sw", NULL, AXP22X_PWR_OUT_CTRL2,
 391                     BIT(7)),
 392         /* LDO regulator internally chained to DCDC5 */
 393         AXP_DESC(AXP809, DC5LDO, "dc5ldo", NULL, 700, 1400, 100,
 394                  AXP22X_DC5LDO_V_OUT, 0x7, AXP22X_PWR_OUT_CTRL1, BIT(0)),
 395         AXP_DESC(AXP809, ALDO1, "aldo1", "aldoin", 700, 3300, 100,
 396                  AXP22X_ALDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(6)),
 397         AXP_DESC(AXP809, ALDO2, "aldo2", "aldoin", 700, 3300, 100,
 398                  AXP22X_ALDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(7)),
 399         AXP_DESC(AXP809, ALDO3, "aldo3", "aldoin", 700, 3300, 100,
 400                  AXP22X_ALDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(5)),
 401         AXP_DESC_RANGES(AXP809, DLDO1, "dldo1", "dldoin", axp803_dldo2_ranges,
 402                         32, AXP22X_DLDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2,
 403                         BIT(3)),
 404         AXP_DESC(AXP809, DLDO2, "dldo2", "dldoin", 700, 3300, 100,
 405                  AXP22X_DLDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(4)),
 406         AXP_DESC(AXP809, ELDO1, "eldo1", "eldoin", 700, 3300, 100,
 407                  AXP22X_ELDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(0)),
 408         AXP_DESC(AXP809, ELDO2, "eldo2", "eldoin", 700, 3300, 100,
 409                  AXP22X_ELDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(1)),
 410         AXP_DESC(AXP809, ELDO3, "eldo3", "eldoin", 700, 3300, 100,
 411                  AXP22X_ELDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(2)),
 412         /*
 413          * Note the datasheet only guarantees reliable operation up to
 414          * 3.3V, this needs to be enforced via dts provided constraints
 415          */
 416         AXP_DESC_IO(AXP809, LDO_IO0, "ldo_io0", "ips", 700, 3800, 100,
 417                     AXP22X_LDO_IO0_V_OUT, 0x1f, AXP20X_GPIO0_CTRL, 0x07,
 418                     AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
 419         /*
 420          * Note the datasheet only guarantees reliable operation up to
 421          * 3.3V, this needs to be enforced via dts provided constraints
 422          */
 423         AXP_DESC_IO(AXP809, LDO_IO1, "ldo_io1", "ips", 700, 3800, 100,
 424                     AXP22X_LDO_IO1_V_OUT, 0x1f, AXP20X_GPIO1_CTRL, 0x07,
 425                     AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
 426         AXP_DESC_FIXED(AXP809, RTC_LDO, "rtc_ldo", "ips", 1800),
 427         AXP_DESC_SW(AXP809, SW, "sw", "swin", AXP22X_PWR_OUT_CTRL2, BIT(6)),
 428 };
 429
 430 static const struct regulator_desc axp813_regulators[] = {
 431         AXP_DESC(AXP813, DCDC1, "dcdc1", "vin1", 1600, 3400, 100,
 432                  AXP803_DCDC1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(0)),
 433         AXP_DESC_RANGES(AXP813, DCDC2, "dcdc2", "vin2", axp803_dcdc234_ranges,
 434                         76, AXP803_DCDC2_V_OUT, 0x7f, AXP22X_PWR_OUT_CTRL1,
 435                         BIT(1)),
 436         AXP_DESC_RANGES(AXP813, DCDC3, "dcdc3", "vin3", axp803_dcdc234_ranges,
 437                         76, AXP803_DCDC3_V_OUT, 0x7f, AXP22X_PWR_OUT_CTRL1,
 438                         BIT(2)),
 439         AXP_DESC_RANGES(AXP813, DCDC4, "dcdc4", "vin4", axp803_dcdc234_ranges,
 440                         76, AXP803_DCDC4_V_OUT, 0x7f, AXP22X_PWR_OUT_CTRL1,
 441                         BIT(3)),
 442         AXP_DESC_RANGES(AXP813, DCDC5, "dcdc5", "vin5", axp803_dcdc5_ranges,
 443                         68, AXP803_DCDC5_V_OUT, 0x7f, AXP22X_PWR_OUT_CTRL1,
 444                         BIT(4)),
 445         AXP_DESC_RANGES(AXP813, DCDC6, "dcdc6", "vin6", axp803_dcdc6_ranges,
 446                         72, AXP803_DCDC6_V_OUT, 0x7f, AXP22X_PWR_OUT_CTRL1,
 447                         BIT(5)),
 448         AXP_DESC_RANGES(AXP813, DCDC7, "dcdc7", "vin7", axp803_dcdc6_ranges,
 449                         72, AXP813_DCDC7_V_OUT, 0x7f, AXP22X_PWR_OUT_CTRL1,
 450                         BIT(6)),
 451         AXP_DESC(AXP813, ALDO1, "aldo1", "aldoin", 700, 3300, 100,
 452                  AXP22X_ALDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL3, BIT(5)),
 453         AXP_DESC(AXP813, ALDO2, "aldo2", "aldoin", 700, 3300, 100,
 454                  AXP22X_ALDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL3, BIT(6)),
 455         AXP_DESC(AXP813, ALDO3, "aldo3", "aldoin", 700, 3300, 100,
 456                  AXP22X_ALDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL3, BIT(7)),
 457         AXP_DESC(AXP813, DLDO1, "dldo1", "dldoin", 700, 3300, 100,
 458                  AXP22X_DLDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(3)),
 459         AXP_DESC_RANGES(AXP813, DLDO2, "dldo2", "dldoin", axp803_dldo2_ranges,
 460                         32, AXP22X_DLDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2,
 461                         BIT(4)),
 462         AXP_DESC(AXP813, DLDO3, "dldo3", "dldoin", 700, 3300, 100,
 463                  AXP22X_DLDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(5)),
 464         AXP_DESC(AXP813, DLDO4, "dldo4", "dldoin", 700, 3300, 100,
 465                  AXP22X_DLDO4_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(6)),
 466         AXP_DESC(AXP813, ELDO1, "eldo1", "eldoin", 700, 1900, 50,
 467                  AXP22X_ELDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(0)),
 468         AXP_DESC(AXP813, ELDO2, "eldo2", "eldoin", 700, 1900, 50,
 469                  AXP22X_ELDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(1)),
 470         AXP_DESC(AXP813, ELDO3, "eldo3", "eldoin", 700, 1900, 50,
 471                  AXP22X_ELDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(2)),
 472         /* to do / check ... */
 473         AXP_DESC(AXP813, FLDO1, "fldo1", "fldoin", 700, 1450, 50,
 474                  AXP803_FLDO1_V_OUT, 0x0f, AXP22X_PWR_OUT_CTRL3, BIT(2)),
 475         AXP_DESC(AXP813, FLDO2, "fldo2", "fldoin", 700, 1450, 50,
 476                  AXP803_FLDO2_V_OUT, 0x0f, AXP22X_PWR_OUT_CTRL3, BIT(3)),
 477         /*
 478          * TODO: FLDO3 = {DCDC5, FLDOIN} / 2
 479          *
 480          * This means FLDO3 effectively switches supplies at runtime,
 481          * something the regulator subsystem does not support.
 482          */
 483         AXP_DESC_FIXED(AXP813, RTC_LDO, "rtc-ldo", "ips", 1800),
 484         AXP_DESC_IO(AXP813, LDO_IO0, "ldo-io0", "ips", 700, 3300, 100,
 485                     AXP22X_LDO_IO0_V_OUT, 0x1f, AXP20X_GPIO0_CTRL, 0x07,
 486                     AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
 487         AXP_DESC_IO(AXP813, LDO_IO1, "ldo-io1", "ips", 700, 3300, 100,
 488                     AXP22X_LDO_IO1_V_OUT, 0x1f, AXP20X_GPIO1_CTRL, 0x07,
 489                     AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
 490         AXP_DESC_SW(AXP813, SW, "sw", "swin", AXP22X_PWR_OUT_CTRL2, BIT(7)),
 491 };
 492
 493 static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
 494 {
 495         struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
 496         unsigned int reg = AXP20X_DCDC_FREQ;
 497         u32 min, max, def, step;
 498
 499         switch (axp20x->variant) {
 500         case AXP202_ID:
 501         case AXP209_ID:
 502                 min = 750;
 503                 max = 1875;
 504                 def = 1500;
 505                 step = 75;
 506                 break;
 507         case AXP803_ID:
 508         case AXP813_ID:
 509                 /*
 510                  * AXP803/AXP813 DCDC work frequency setting has the same
 511                  * range and step as AXP22X, but at a different register.
 512                  * Fall through to the check below.
 513                  * (See include/linux/mfd/axp20x.h)
 514                  */
 515                 reg = AXP803_DCDC_FREQ_CTRL;
 516         case AXP806_ID:
 517                 /*
 518                  * AXP806 also have DCDC work frequency setting register at a
 519                  * different position.
 520                  */
 521                 if (axp20x->variant == AXP806_ID)
 522                         reg = AXP806_DCDC_FREQ_CTRL;
 523         case AXP221_ID:
 524         case AXP223_ID:
 525         case AXP809_ID:
 526                 min = 1800;
 527                 max = 4050;
 528                 def = 3000;
 529                 step = 150;
 530                 break;
 531         default:
 532                 dev_err(&pdev->dev,
 533                         "Setting DCDC frequency for unsupported AXP variant\n");
 534                 return -EINVAL;
 535         }
 536
 537         if (dcdcfreq == 0)
 538                 dcdcfreq = def;
 539
 540         if (dcdcfreq < min) {
 541                 dcdcfreq = min;
 542                 dev_warn(&pdev->dev, "DCDC frequency too low. Set to %ukHz\n",
 543                          min);
 544         }
 545
 546         if (dcdcfreq > max) {
 547                 dcdcfreq = max;
 548                 dev_warn(&pdev->dev, "DCDC frequency too high. Set to %ukHz\n",
 549                          max);
 550         }
 551
 552         dcdcfreq = (dcdcfreq - min) / step;
 553
 554         return regmap_update_bits(axp20x->regmap, reg,
 555                                   AXP20X_FREQ_DCDC_MASK, dcdcfreq);
 556 }
 557
 558 static int axp20x_regulator_parse_dt(struct platform_device *pdev)
 559 {
 560         struct device_node *np, *regulators;
 561         int ret;
 562         u32 dcdcfreq = 0;
 563
 564         np = of_node_get(pdev->dev.parent->of_node);
 565         if (!np)
 566                 return 0;
 567
 568         regulators = of_get_child_by_name(np, "regulators");
 569         if (!regulators) {
 570                 dev_warn(&pdev->dev, "regulators node not found\n");
 571         } else {
 572                 of_property_read_u32(regulators, "x-powers,dcdc-freq", &dcdcfreq);
 573                 ret = axp20x_set_dcdc_freq(pdev, dcdcfreq);
 574                 if (ret < 0) {
 575                         dev_err(&pdev->dev, "Error setting dcdc frequency: %d\n", ret);
 576                         return ret;
 577                 }
 578
 579                 of_node_put(regulators);
 580         }
 581
 582         return 0;
 583 }
 584
 585 static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode)
 586 {
 587         struct axp20x_dev *axp20x = rdev_get_drvdata(rdev);
 588         unsigned int reg = AXP20X_DCDC_MODE;
 589         unsigned int mask;
 590
 591         switch (axp20x->variant) {
 592         case AXP202_ID:
 593         case AXP209_ID:
 594                 if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
 595                         return -EINVAL;
 596
 597                 mask = AXP20X_WORKMODE_DCDC2_MASK;
 598                 if (id == AXP20X_DCDC3)
 599                         mask = AXP20X_WORKMODE_DCDC3_MASK;
 600
 601                 workmode <<= ffs(mask) - 1;
 602                 break;
 603
 604         case AXP806_ID:
 605                 reg = AXP806_DCDC_MODE_CTRL2;
 606                 /*
 607                  * AXP806 DCDC regulator IDs have the same range as AXP22X.
 608                  * Fall through to the check below.
 609                  * (See include/linux/mfd/axp20x.h)
 610                  */
 611         case AXP221_ID:
 612         case AXP223_ID:
 613         case AXP809_ID:
 614                 if (id < AXP22X_DCDC1 || id > AXP22X_DCDC5)
 615                         return -EINVAL;
 616
 617                 mask = AXP22X_WORKMODE_DCDCX_MASK(id - AXP22X_DCDC1);
 618                 workmode <<= id - AXP22X_DCDC1;
 619                 break;
 620
 621         case AXP803_ID:
 622                 if (id < AXP803_DCDC1 || id > AXP803_DCDC6)
 623                         return -EINVAL;
 624
 625                 mask = AXP22X_WORKMODE_DCDCX_MASK(id - AXP803_DCDC1);
 626                 workmode <<= id - AXP803_DCDC1;
 627                 break;
 628
 629         case AXP813_ID:
 630                 if (id < AXP813_DCDC1 || id > AXP813_DCDC7)
 631                         return -EINVAL;
 632
 633                 mask = AXP22X_WORKMODE_DCDCX_MASK(id - AXP813_DCDC1);
 634                 workmode <<= id - AXP813_DCDC1;
 635                 break;
 636
 637         default:
 638                 /* should not happen */
 639                 WARN_ON(1);
 640                 return -EINVAL;
 641         }
 642
 643         return regmap_update_bits(rdev->regmap, reg, mask, workmode);
 644 }
 645
 646 /*
 647  * This function checks whether a regulator is part of a poly-phase
 648  * output setup based on the registers settings. Returns true if it is.
 649  */
 650 static bool axp20x_is_polyphase_slave(struct axp20x_dev *axp20x, int id)
 651 {
 652         u32 reg = 0;
 653
 654         /*
 655          * Currently in our supported AXP variants, only AXP803, AXP806,
 656          * and AXP813 have polyphase regulators.
 657          */
 658         switch (axp20x->variant) {
 659         case AXP803_ID:
 660         case AXP813_ID:
 661                 regmap_read(axp20x->regmap, AXP803_POLYPHASE_CTRL, &reg);
 662
 663                 switch (id) {
 664                 case AXP803_DCDC3:
 665                         return !!(reg & BIT(6));
 666                 case AXP803_DCDC6:
 667                         return !!(reg & BIT(5));
 668                 }
 669                 break;
 670
 671         case AXP806_ID:
 672                 regmap_read(axp20x->regmap, AXP806_DCDC_MODE_CTRL2, &reg);
 673
 674                 switch (id) {
 675                 case AXP806_DCDCB:
 676                         return (((reg & GENMASK(7, 6)) == BIT(6)) ||
 677                                 ((reg & GENMASK(7, 6)) == BIT(7)));
 678                 case AXP806_DCDCC:
 679                         return ((reg & GENMASK(7, 6)) == BIT(7));
 680                 case AXP806_DCDCE:
 681                         return !!(reg & BIT(5));
 682                 }
 683                 break;
 684
 685         default:
 686                 return false;
 687         }
 688
 689         return false;
 690 }
 691
 692 static int axp20x_regulator_probe(struct platform_device *pdev)
 693 {
 694         struct regulator_dev *rdev;
 695         struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
 696         const struct regulator_desc *regulators;
 697         struct regulator_config config = {
 698                 .dev = pdev->dev.parent,
 699                 .regmap = axp20x->regmap,
 700                 .driver_data = axp20x,
 701         };
 702         int ret, i, nregulators;
 703         u32 workmode;
 704         const char *dcdc1_name = axp22x_regulators[AXP22X_DCDC1].name;
 705         const char *dcdc5_name = axp22x_regulators[AXP22X_DCDC5].name;
 706         bool drivevbus = false;
 707
 708         switch (axp20x->variant) {
 709         case AXP202_ID:
 710         case AXP209_ID:
 711                 regulators = axp20x_regulators;
 712                 nregulators = AXP20X_REG_ID_MAX;
 713                 break;
 714         case AXP221_ID:
 715         case AXP223_ID:
 716                 regulators = axp22x_regulators;
 717                 nregulators = AXP22X_REG_ID_MAX;
 718                 drivevbus = of_property_read_bool(pdev->dev.parent->of_node,
 719                                                   "x-powers,drive-vbus-en");
 720                 break;
 721         case AXP803_ID:
 722                 regulators = axp803_regulators;
 723                 nregulators = AXP803_REG_ID_MAX;
 724                 break;
 725         case AXP806_ID:
 726                 regulators = axp806_regulators;
 727                 nregulators = AXP806_REG_ID_MAX;
 728                 break;
 729         case AXP809_ID:
 730                 regulators = axp809_regulators;
 731                 nregulators = AXP809_REG_ID_MAX;
 732                 break;
 733         case AXP813_ID:
 734                 regulators = axp813_regulators;
 735                 nregulators = AXP813_REG_ID_MAX;
 736                 drivevbus = of_property_read_bool(pdev->dev.parent->of_node,
 737                                                   "x-powers,drive-vbus-en");
 738                 break;
 739         default:
 740                 dev_err(&pdev->dev, "Unsupported AXP variant: %ld\n",
 741                         axp20x->variant);
 742                 return -EINVAL;
 743         }
 744
 745         /* This only sets the dcdc freq. Ignore any errors */
 746         axp20x_regulator_parse_dt(pdev);
 747
 748         for (i = 0; i < nregulators; i++) {
 749                 const struct regulator_desc *desc = &regulators[i];
 750                 struct regulator_desc *new_desc;
 751
 752                 /*
 753                  * If this regulator is a slave in a poly-phase setup,
 754                  * skip it, as its controls are bound to the master
 755                  * regulator and won't work.
 756                  */
 757                 if (axp20x_is_polyphase_slave(axp20x, i))
 758                         continue;
 759
 760                 /* Support for AXP813's FLDO3 is not implemented */
 761                 if (axp20x->variant == AXP813_ID && i == AXP813_FLDO3)
 762                         continue;
 763
 764                 /*
 765                  * Regulators DC1SW and DC5LDO are connected internally,
 766                  * so we have to handle their supply names separately.
 767                  *
 768                  * We always register the regulators in proper sequence,
 769                  * so the supply names are correctly read. See the last
 770                  * part of this loop to see where we save the DT defined
 771                  * name.
 772                  */
 773                 if ((regulators == axp22x_regulators && i == AXP22X_DC1SW) ||
 774                     (regulators == axp803_regulators && i == AXP803_DC1SW) ||
 775                     (regulators == axp809_regulators && i == AXP809_DC1SW)) {
 776                         new_desc = devm_kzalloc(&pdev->dev, sizeof(*desc),
 777                                                 GFP_KERNEL);
 778                         if (!new_desc)
 779                                 return -ENOMEM;
 780
 781                         *new_desc = regulators[i];
 782                         new_desc->supply_name = dcdc1_name;
 783                         desc = new_desc;
 784                 }
 785
 786                 if ((regulators == axp22x_regulators && i == AXP22X_DC5LDO) ||
 787                     (regulators == axp809_regulators && i == AXP809_DC5LDO)) {
 788                         new_desc = devm_kzalloc(&pdev->dev, sizeof(*desc),
 789                                                 GFP_KERNEL);
 790                         if (!new_desc)
 791                                 return -ENOMEM;
 792
 793                         *new_desc = regulators[i];
 794                         new_desc->supply_name = dcdc5_name;
 795                         desc = new_desc;
 796                 }
 797
 798                 rdev = devm_regulator_register(&pdev->dev, desc, &config);
 799                 if (IS_ERR(rdev)) {
 800                         dev_err(&pdev->dev, "Failed to register %s\n",
 801                                 regulators[i].name);
 802
 803                         return PTR_ERR(rdev);
 804                 }
 805
 806                 ret = of_property_read_u32(rdev->dev.of_node,
 807                                            "x-powers,dcdc-workmode",
 808                                            &workmode);
 809                 if (!ret) {
 810                         if (axp20x_set_dcdc_workmode(rdev, i, workmode))
 811                                 dev_err(&pdev->dev, "Failed to set workmode on %s\n",
 812                                         rdev->desc->name);
 813                 }
 814
 815                 /*
 816                  * Save AXP22X DCDC1 / DCDC5 regulator names for later.
 817                  */
 818                 if ((regulators == axp22x_regulators && i == AXP22X_DCDC1) ||
 819                     (regulators == axp809_regulators && i == AXP809_DCDC1))
 820                         of_property_read_string(rdev->dev.of_node,
 821                                                 "regulator-name",
 822                                                 &dcdc1_name);
 823
 824                 if ((regulators == axp22x_regulators && i == AXP22X_DCDC5) ||
 825                     (regulators == axp809_regulators && i == AXP809_DCDC5))
 826                         of_property_read_string(rdev->dev.of_node,
 827                                                 "regulator-name",
 828                                                 &dcdc5_name);
 829         }
 830
 831         if (drivevbus) {
 832                 /* Change N_VBUSEN sense pin to DRIVEVBUS output pin */
 833                 regmap_update_bits(axp20x->regmap, AXP20X_OVER_TMP,
 834                                    AXP22X_MISC_N_VBUSEN_FUNC, 0);
 835                 rdev = devm_regulator_register(&pdev->dev,
 836                                                &axp22x_drivevbus_regulator,
 837                                                &config);
 838                 if (IS_ERR(rdev)) {
 839                         dev_err(&pdev->dev, "Failed to register drivevbus\n");
 840                         return PTR_ERR(rdev);
 841                 }
 842         }
 843
 844         return 0;
 845 }
 846
 847 static struct platform_driver axp20x_regulator_driver = {
 848         .probe  = axp20x_regulator_probe,
 849         .driver = {
 850                 .name           = "axp20x-regulator",
 851         },
 852 };
 853
 854 module_platform_driver(axp20x_regulator_driver);
 855
 856 MODULE_LICENSE("GPL v2");
 857 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
 858 MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC");
 859 MODULE_ALIAS("platform:axp20x-regulator");