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, ®); 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, ®); 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 = ®ulators[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"); 860