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 static const struct regulator_linear_range axp806_dcdca_ranges[] = {
 248         REGULATOR_LINEAR_RANGE(600000, 0x0, 0x32, 10000),
 249         REGULATOR_LINEAR_RANGE(1120000, 0x33, 0x47, 20000),
 250 };
 251
 252 static const struct regulator_linear_range axp806_dcdcd_ranges[] = {
 253         REGULATOR_LINEAR_RANGE(600000, 0x0, 0x2d, 20000),
 254         REGULATOR_LINEAR_RANGE(1600000, 0x2e, 0x3f, 100000),
 255 };
 256
 257 static const struct regulator_linear_range axp806_cldo2_ranges[] = {
 258         REGULATOR_LINEAR_RANGE(700000, 0x0, 0x1a, 100000),
 259         REGULATOR_LINEAR_RANGE(3400000, 0x1b, 0x1f, 200000),
 260 };
 261
 262 static const struct regulator_desc axp806_regulators[] = {
 263         AXP_DESC_RANGES(AXP806, DCDCA, "dcdca", "vina", axp806_dcdca_ranges,
 264                         72, AXP806_DCDCA_V_CTRL, 0x7f, AXP806_PWR_OUT_CTRL1,
 265                         BIT(0)),
 266         AXP_DESC(AXP806, DCDCB, "dcdcb", "vinb", 1000, 2550, 50,
 267                  AXP806_DCDCB_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL1, BIT(1)),
 268         AXP_DESC_RANGES(AXP806, DCDCC, "dcdcc", "vinc", axp806_dcdca_ranges,
 269                         72, AXP806_DCDCC_V_CTRL, 0x7f, AXP806_PWR_OUT_CTRL1,
 270                         BIT(2)),
 271         AXP_DESC_RANGES(AXP806, DCDCD, "dcdcd", "vind", axp806_dcdcd_ranges,
 272                         64, AXP806_DCDCD_V_CTRL, 0x3f, AXP806_PWR_OUT_CTRL1,
 273                         BIT(3)),
 274         AXP_DESC(AXP806, DCDCE, "dcdce", "vine", 1100, 3400, 100,
 275                  AXP806_DCDCE_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL1, BIT(4)),
 276         AXP_DESC(AXP806, ALDO1, "aldo1", "aldoin", 700, 3300, 100,
 277                  AXP806_ALDO1_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL1, BIT(5)),
 278         AXP_DESC(AXP806, ALDO2, "aldo2", "aldoin", 700, 3400, 100,
 279                  AXP806_ALDO2_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL1, BIT(6)),
 280         AXP_DESC(AXP806, ALDO3, "aldo3", "aldoin", 700, 3300, 100,
 281                  AXP806_ALDO3_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL1, BIT(7)),
 282         AXP_DESC(AXP806, BLDO1, "bldo1", "bldoin", 700, 1900, 100,
 283                  AXP806_BLDO1_V_CTRL, 0x0f, AXP806_PWR_OUT_CTRL2, BIT(0)),
 284         AXP_DESC(AXP806, BLDO2, "bldo2", "bldoin", 700, 1900, 100,
 285                  AXP806_BLDO2_V_CTRL, 0x0f, AXP806_PWR_OUT_CTRL2, BIT(1)),
 286         AXP_DESC(AXP806, BLDO3, "bldo3", "bldoin", 700, 1900, 100,
 287                  AXP806_BLDO3_V_CTRL, 0x0f, AXP806_PWR_OUT_CTRL2, BIT(2)),
 288         AXP_DESC(AXP806, BLDO4, "bldo4", "bldoin", 700, 1900, 100,
 289                  AXP806_BLDO4_V_CTRL, 0x0f, AXP806_PWR_OUT_CTRL2, BIT(3)),
 290         AXP_DESC(AXP806, CLDO1, "cldo1", "cldoin", 700, 3300, 100,
 291                  AXP806_CLDO1_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL2, BIT(4)),
 292         AXP_DESC_RANGES(AXP806, CLDO2, "cldo2", "cldoin", axp806_cldo2_ranges,
 293                         32, AXP806_CLDO2_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL2,
 294                         BIT(5)),
 295         AXP_DESC(AXP806, CLDO3, "cldo3", "cldoin", 700, 3300, 100,
 296                  AXP806_CLDO3_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL2, BIT(6)),
 297         AXP_DESC_SW(AXP806, SW, "sw", "swin", AXP806_PWR_OUT_CTRL2, BIT(7)),
 298 };
 299
 300 static const struct regulator_linear_range axp809_dcdc4_ranges[] = {
 301         REGULATOR_LINEAR_RANGE(600000, 0x0, 0x2f, 20000),
 302         REGULATOR_LINEAR_RANGE(1800000, 0x30, 0x38, 100000),
 303 };
 304
 305 static const struct regulator_desc axp809_regulators[] = {
 306         AXP_DESC(AXP809, DCDC1, "dcdc1", "vin1", 1600, 3400, 100,
 307                  AXP22X_DCDC1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(1)),
 308         AXP_DESC(AXP809, DCDC2, "dcdc2", "vin2", 600, 1540, 20,
 309                  AXP22X_DCDC2_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(2)),
 310         AXP_DESC(AXP809, DCDC3, "dcdc3", "vin3", 600, 1860, 20,
 311                  AXP22X_DCDC3_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(3)),
 312         AXP_DESC_RANGES(AXP809, DCDC4, "dcdc4", "vin4", axp809_dcdc4_ranges,
 313                         57, AXP22X_DCDC4_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1,
 314                         BIT(4)),
 315         AXP_DESC(AXP809, DCDC5, "dcdc5", "vin5", 1000, 2550, 50,
 316                  AXP22X_DCDC5_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(5)),
 317         /* secondary switchable output of DCDC1 */
 318         AXP_DESC_SW(AXP809, DC1SW, "dc1sw", NULL, AXP22X_PWR_OUT_CTRL2,
 319                     BIT(7)),
 320         /* LDO regulator internally chained to DCDC5 */
 321         AXP_DESC(AXP809, DC5LDO, "dc5ldo", NULL, 700, 1400, 100,
 322                  AXP22X_DC5LDO_V_OUT, 0x7, AXP22X_PWR_OUT_CTRL1, BIT(0)),
 323         AXP_DESC(AXP809, ALDO1, "aldo1", "aldoin", 700, 3300, 100,
 324                  AXP22X_ALDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(6)),
 325         AXP_DESC(AXP809, ALDO2, "aldo2", "aldoin", 700, 3300, 100,
 326                  AXP22X_ALDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(7)),
 327         AXP_DESC(AXP809, ALDO3, "aldo3", "aldoin", 700, 3300, 100,
 328                  AXP22X_ALDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(5)),
 329         AXP_DESC_RANGES(AXP809, DLDO1, "dldo1", "dldoin", axp806_cldo2_ranges,
 330                         32, AXP22X_DLDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2,
 331                         BIT(3)),
 332         AXP_DESC(AXP809, DLDO2, "dldo2", "dldoin", 700, 3300, 100,
 333                  AXP22X_DLDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(4)),
 334         AXP_DESC(AXP809, ELDO1, "eldo1", "eldoin", 700, 3300, 100,
 335                  AXP22X_ELDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(0)),
 336         AXP_DESC(AXP809, ELDO2, "eldo2", "eldoin", 700, 3300, 100,
 337                  AXP22X_ELDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(1)),
 338         AXP_DESC(AXP809, ELDO3, "eldo3", "eldoin", 700, 3300, 100,
 339                  AXP22X_ELDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(2)),
 340         /*
 341          * Note the datasheet only guarantees reliable operation up to
 342          * 3.3V, this needs to be enforced via dts provided constraints
 343          */
 344         AXP_DESC_IO(AXP809, LDO_IO0, "ldo_io0", "ips", 700, 3800, 100,
 345                     AXP22X_LDO_IO0_V_OUT, 0x1f, AXP20X_GPIO0_CTRL, 0x07,
 346                     AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
 347         /*
 348          * Note the datasheet only guarantees reliable operation up to
 349          * 3.3V, this needs to be enforced via dts provided constraints
 350          */
 351         AXP_DESC_IO(AXP809, LDO_IO1, "ldo_io1", "ips", 700, 3800, 100,
 352                     AXP22X_LDO_IO1_V_OUT, 0x1f, AXP20X_GPIO1_CTRL, 0x07,
 353                     AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
 354         AXP_DESC_FIXED(AXP809, RTC_LDO, "rtc_ldo", "ips", 1800),
 355         AXP_DESC_SW(AXP809, SW, "sw", "swin", AXP22X_PWR_OUT_CTRL2, BIT(6)),
 356 };
 357
 358 static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
 359 {
 360         struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
 361         unsigned int reg = AXP20X_DCDC_FREQ;
 362         u32 min, max, def, step;
 363
 364         switch (axp20x->variant) {
 365         case AXP202_ID:
 366         case AXP209_ID:
 367                 min = 750;
 368                 max = 1875;
 369                 def = 1500;
 370                 step = 75;
 371                 break;
 372         case AXP806_ID:
 373                 /*
 374                  * AXP806 DCDC work frequency setting has the same range and
 375                  * step as AXP22X, but at a different register.
 376                  * Fall through to the check below.
 377                  * (See include/linux/mfd/axp20x.h)
 378                  */
 379                 reg = AXP806_DCDC_FREQ_CTRL;
 380         case AXP221_ID:
 381         case AXP223_ID:
 382         case AXP809_ID:
 383                 min = 1800;
 384                 max = 4050;
 385                 def = 3000;
 386                 step = 150;
 387                 break;
 388         default:
 389                 dev_err(&pdev->dev,
 390                         "Setting DCDC frequency for unsupported AXP variant\n");
 391                 return -EINVAL;
 392         }
 393
 394         if (dcdcfreq == 0)
 395                 dcdcfreq = def;
 396
 397         if (dcdcfreq < min) {
 398                 dcdcfreq = min;
 399                 dev_warn(&pdev->dev, "DCDC frequency too low. Set to %ukHz\n",
 400                          min);
 401         }
 402
 403         if (dcdcfreq > max) {
 404                 dcdcfreq = max;
 405                 dev_warn(&pdev->dev, "DCDC frequency too high. Set to %ukHz\n",
 406                          max);
 407         }
 408
 409         dcdcfreq = (dcdcfreq - min) / step;
 410
 411         return regmap_update_bits(axp20x->regmap, reg,
 412                                   AXP20X_FREQ_DCDC_MASK, dcdcfreq);
 413 }
 414
 415 static int axp20x_regulator_parse_dt(struct platform_device *pdev)
 416 {
 417         struct device_node *np, *regulators;
 418         int ret;
 419         u32 dcdcfreq = 0;
 420
 421         np = of_node_get(pdev->dev.parent->of_node);
 422         if (!np)
 423                 return 0;
 424
 425         regulators = of_get_child_by_name(np, "regulators");
 426         if (!regulators) {
 427                 dev_warn(&pdev->dev, "regulators node not found\n");
 428         } else {
 429                 of_property_read_u32(regulators, "x-powers,dcdc-freq", &dcdcfreq);
 430                 ret = axp20x_set_dcdc_freq(pdev, dcdcfreq);
 431                 if (ret < 0) {
 432                         dev_err(&pdev->dev, "Error setting dcdc frequency: %d\n", ret);
 433                         return ret;
 434                 }
 435
 436                 of_node_put(regulators);
 437         }
 438
 439         return 0;
 440 }
 441
 442 static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode)
 443 {
 444         struct axp20x_dev *axp20x = rdev_get_drvdata(rdev);
 445         unsigned int reg = AXP20X_DCDC_MODE;
 446         unsigned int mask;
 447
 448         switch (axp20x->variant) {
 449         case AXP202_ID:
 450         case AXP209_ID:
 451                 if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
 452                         return -EINVAL;
 453
 454                 mask = AXP20X_WORKMODE_DCDC2_MASK;
 455                 if (id == AXP20X_DCDC3)
 456                         mask = AXP20X_WORKMODE_DCDC3_MASK;
 457
 458                 workmode <<= ffs(mask) - 1;
 459                 break;
 460
 461         case AXP806_ID:
 462                 reg = AXP806_DCDC_MODE_CTRL2;
 463                 /*
 464                  * AXP806 DCDC regulator IDs have the same range as AXP22X.
 465                  * Fall through to the check below.
 466                  * (See include/linux/mfd/axp20x.h)
 467                  */
 468         case AXP221_ID:
 469         case AXP223_ID:
 470         case AXP809_ID:
 471                 if (id < AXP22X_DCDC1 || id > AXP22X_DCDC5)
 472                         return -EINVAL;
 473
 474                 mask = AXP22X_WORKMODE_DCDCX_MASK(id - AXP22X_DCDC1);
 475                 workmode <<= id - AXP22X_DCDC1;
 476                 break;
 477
 478         default:
 479                 /* should not happen */
 480                 WARN_ON(1);
 481                 return -EINVAL;
 482         }
 483
 484         return regmap_update_bits(rdev->regmap, reg, mask, workmode);
 485 }
 486
 487 /*
 488  * This function checks whether a regulator is part of a poly-phase
 489  * output setup based on the registers settings. Returns true if it is.
 490  */
 491 static bool axp20x_is_polyphase_slave(struct axp20x_dev *axp20x, int id)
 492 {
 493         u32 reg = 0;
 494
 495         /* Only AXP806 has poly-phase outputs */
 496         if (axp20x->variant != AXP806_ID)
 497                 return false;
 498
 499         regmap_read(axp20x->regmap, AXP806_DCDC_MODE_CTRL2, &reg);
 500
 501         switch (id) {
 502         case AXP806_DCDCB:
 503                 return (((reg & GENMASK(7, 6)) == BIT(6)) ||
 504                         ((reg & GENMASK(7, 6)) == BIT(7)));
 505         case AXP806_DCDCC:
 506                 return ((reg & GENMASK(7, 6)) == BIT(7));
 507         case AXP806_DCDCE:
 508                 return !!(reg & BIT(5));
 509         }
 510
 511         return false;
 512 }
 513
 514 static int axp20x_regulator_probe(struct platform_device *pdev)
 515 {
 516         struct regulator_dev *rdev;
 517         struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
 518         const struct regulator_desc *regulators;
 519         struct regulator_config config = {
 520                 .dev = pdev->dev.parent,
 521                 .regmap = axp20x->regmap,
 522                 .driver_data = axp20x,
 523         };
 524         int ret, i, nregulators;
 525         u32 workmode;
 526         const char *dcdc1_name = axp22x_regulators[AXP22X_DCDC1].name;
 527         const char *dcdc5_name = axp22x_regulators[AXP22X_DCDC5].name;
 528         bool drivevbus = false;
 529
 530         switch (axp20x->variant) {
 531         case AXP202_ID:
 532         case AXP209_ID:
 533                 regulators = axp20x_regulators;
 534                 nregulators = AXP20X_REG_ID_MAX;
 535                 break;
 536         case AXP221_ID:
 537         case AXP223_ID:
 538                 regulators = axp22x_regulators;
 539                 nregulators = AXP22X_REG_ID_MAX;
 540                 drivevbus = of_property_read_bool(pdev->dev.parent->of_node,
 541                                                   "x-powers,drive-vbus-en");
 542                 break;
 543         case AXP806_ID:
 544                 regulators = axp806_regulators;
 545                 nregulators = AXP806_REG_ID_MAX;
 546                 break;
 547         case AXP809_ID:
 548                 regulators = axp809_regulators;
 549                 nregulators = AXP809_REG_ID_MAX;
 550                 break;
 551         default:
 552                 dev_err(&pdev->dev, "Unsupported AXP variant: %ld\n",
 553                         axp20x->variant);
 554                 return -EINVAL;
 555         }
 556
 557         /* This only sets the dcdc freq. Ignore any errors */
 558         axp20x_regulator_parse_dt(pdev);
 559
 560         for (i = 0; i < nregulators; i++) {
 561                 const struct regulator_desc *desc = &regulators[i];
 562                 struct regulator_desc *new_desc;
 563
 564                 /*
 565                  * If this regulator is a slave in a poly-phase setup,
 566                  * skip it, as its controls are bound to the master
 567                  * regulator and won't work.
 568                  */
 569                 if (axp20x_is_polyphase_slave(axp20x, i))
 570                         continue;
 571
 572                 /*
 573                  * Regulators DC1SW and DC5LDO are connected internally,
 574                  * so we have to handle their supply names separately.
 575                  *
 576                  * We always register the regulators in proper sequence,
 577                  * so the supply names are correctly read. See the last
 578                  * part of this loop to see where we save the DT defined
 579                  * name.
 580                  */
 581                 if ((regulators == axp22x_regulators && i == AXP22X_DC1SW) ||
 582                     (regulators == axp809_regulators && i == AXP809_DC1SW)) {
 583                         new_desc = devm_kzalloc(&pdev->dev, sizeof(*desc),
 584                                                 GFP_KERNEL);
 585                         *new_desc = regulators[i];
 586                         new_desc->supply_name = dcdc1_name;
 587                         desc = new_desc;
 588                 }
 589
 590                 if ((regulators == axp22x_regulators && i == AXP22X_DC5LDO) ||
 591                     (regulators == axp809_regulators && i == AXP809_DC5LDO)) {
 592                         new_desc = devm_kzalloc(&pdev->dev, sizeof(*desc),
 593                                                 GFP_KERNEL);
 594                         *new_desc = regulators[i];
 595                         new_desc->supply_name = dcdc5_name;
 596                         desc = new_desc;
 597                 }
 598
 599                 rdev = devm_regulator_register(&pdev->dev, desc, &config);
 600                 if (IS_ERR(rdev)) {
 601                         dev_err(&pdev->dev, "Failed to register %s\n",
 602                                 regulators[i].name);
 603
 604                         return PTR_ERR(rdev);
 605                 }
 606
 607                 ret = of_property_read_u32(rdev->dev.of_node,
 608                                            "x-powers,dcdc-workmode",
 609                                            &workmode);
 610                 if (!ret) {
 611                         if (axp20x_set_dcdc_workmode(rdev, i, workmode))
 612                                 dev_err(&pdev->dev, "Failed to set workmode on %s\n",
 613                                         rdev->desc->name);
 614                 }
 615
 616                 /*
 617                  * Save AXP22X DCDC1 / DCDC5 regulator names for later.
 618                  */
 619                 if ((regulators == axp22x_regulators && i == AXP22X_DCDC1) ||
 620                     (regulators == axp809_regulators && i == AXP809_DCDC1))
 621                         of_property_read_string(rdev->dev.of_node,
 622                                                 "regulator-name",
 623                                                 &dcdc1_name);
 624
 625                 if ((regulators == axp22x_regulators && i == AXP22X_DCDC5) ||
 626                     (regulators == axp809_regulators && i == AXP809_DCDC5))
 627                         of_property_read_string(rdev->dev.of_node,
 628                                                 "regulator-name",
 629                                                 &dcdc5_name);
 630         }
 631
 632         if (drivevbus) {
 633                 /* Change N_VBUSEN sense pin to DRIVEVBUS output pin */
 634                 regmap_update_bits(axp20x->regmap, AXP20X_OVER_TMP,
 635                                    AXP22X_MISC_N_VBUSEN_FUNC, 0);
 636                 rdev = devm_regulator_register(&pdev->dev,
 637                                                &axp22x_drivevbus_regulator,
 638                                                &config);
 639                 if (IS_ERR(rdev)) {
 640                         dev_err(&pdev->dev, "Failed to register drivevbus\n");
 641                         return PTR_ERR(rdev);
 642                 }
 643         }
 644
 645         return 0;
 646 }
 647
 648 static struct platform_driver axp20x_regulator_driver = {
 649         .probe  = axp20x_regulator_probe,
 650         .driver = {
 651                 .name           = "axp20x-regulator",
 652         },
 653 };
 654
 655 module_platform_driver(axp20x_regulator_driver);
 656
 657 MODULE_LICENSE("GPL v2");
 658 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
 659 MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC");
 660 MODULE_ALIAS("platform:axp20x-regulator");