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, ®); 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 = ®ulators[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"); 661