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 AXP_DESC_IO(_family, _id, _match, _supply, _min, _max, _step, _vreg, \ 40 _vmask, _ereg, _emask, _enable_val, _disable_val) \ 41 [_family##_##_id] = { \ 42 .name = (_match), \ 43 .supply_name = (_supply), \ 44 .of_match = of_match_ptr(_match), \ 45 .regulators_node = of_match_ptr("regulators"), \ 46 .type = REGULATOR_VOLTAGE, \ 47 .id = _family##_##_id, \ 48 .n_voltages = (((_max) - (_min)) / (_step) + 1), \ 49 .owner = THIS_MODULE, \ 50 .min_uV = (_min) * 1000, \ 51 .uV_step = (_step) * 1000, \ 52 .vsel_reg = (_vreg), \ 53 .vsel_mask = (_vmask), \ 54 .enable_reg = (_ereg), \ 55 .enable_mask = (_emask), \ 56 .enable_val = (_enable_val), \ 57 .disable_val = (_disable_val), \ 58 .ops = &axp20x_ops, \ 59 } 60 61 #define AXP_DESC(_family, _id, _match, _supply, _min, _max, _step, _vreg, \ 62 _vmask, _ereg, _emask) \ 63 [_family##_##_id] = { \ 64 .name = (_match), \ 65 .supply_name = (_supply), \ 66 .of_match = of_match_ptr(_match), \ 67 .regulators_node = of_match_ptr("regulators"), \ 68 .type = REGULATOR_VOLTAGE, \ 69 .id = _family##_##_id, \ 70 .n_voltages = (((_max) - (_min)) / (_step) + 1), \ 71 .owner = THIS_MODULE, \ 72 .min_uV = (_min) * 1000, \ 73 .uV_step = (_step) * 1000, \ 74 .vsel_reg = (_vreg), \ 75 .vsel_mask = (_vmask), \ 76 .enable_reg = (_ereg), \ 77 .enable_mask = (_emask), \ 78 .ops = &axp20x_ops, \ 79 } 80 81 #define AXP_DESC_SW(_family, _id, _match, _supply, _ereg, _emask) \ 82 [_family##_##_id] = { \ 83 .name = (_match), \ 84 .supply_name = (_supply), \ 85 .of_match = of_match_ptr(_match), \ 86 .regulators_node = of_match_ptr("regulators"), \ 87 .type = REGULATOR_VOLTAGE, \ 88 .id = _family##_##_id, \ 89 .owner = THIS_MODULE, \ 90 .enable_reg = (_ereg), \ 91 .enable_mask = (_emask), \ 92 .ops = &axp20x_ops_sw, \ 93 } 94 95 #define AXP_DESC_FIXED(_family, _id, _match, _supply, _volt) \ 96 [_family##_##_id] = { \ 97 .name = (_match), \ 98 .supply_name = (_supply), \ 99 .of_match = of_match_ptr(_match), \ 100 .regulators_node = of_match_ptr("regulators"), \ 101 .type = REGULATOR_VOLTAGE, \ 102 .id = _family##_##_id, \ 103 .n_voltages = 1, \ 104 .owner = THIS_MODULE, \ 105 .min_uV = (_volt) * 1000, \ 106 .ops = &axp20x_ops_fixed \ 107 } 108 109 #define AXP_DESC_RANGES(_family, _id, _match, _supply, _ranges, _n_voltages, \ 110 _vreg, _vmask, _ereg, _emask) \ 111 [_family##_##_id] = { \ 112 .name = (_match), \ 113 .supply_name = (_supply), \ 114 .of_match = of_match_ptr(_match), \ 115 .regulators_node = of_match_ptr("regulators"), \ 116 .type = REGULATOR_VOLTAGE, \ 117 .id = _family##_##_id, \ 118 .n_voltages = (_n_voltages), \ 119 .owner = THIS_MODULE, \ 120 .vsel_reg = (_vreg), \ 121 .vsel_mask = (_vmask), \ 122 .enable_reg = (_ereg), \ 123 .enable_mask = (_emask), \ 124 .linear_ranges = (_ranges), \ 125 .n_linear_ranges = ARRAY_SIZE(_ranges), \ 126 .ops = &axp20x_ops_range, \ 127 } 128 129 static struct regulator_ops axp20x_ops_fixed = { 130 .list_voltage = regulator_list_voltage_linear, 131 }; 132 133 static struct regulator_ops axp20x_ops_range = { 134 .set_voltage_sel = regulator_set_voltage_sel_regmap, 135 .get_voltage_sel = regulator_get_voltage_sel_regmap, 136 .list_voltage = regulator_list_voltage_linear_range, 137 .enable = regulator_enable_regmap, 138 .disable = regulator_disable_regmap, 139 .is_enabled = regulator_is_enabled_regmap, 140 }; 141 142 static struct regulator_ops axp20x_ops = { 143 .set_voltage_sel = regulator_set_voltage_sel_regmap, 144 .get_voltage_sel = regulator_get_voltage_sel_regmap, 145 .list_voltage = regulator_list_voltage_linear, 146 .enable = regulator_enable_regmap, 147 .disable = regulator_disable_regmap, 148 .is_enabled = regulator_is_enabled_regmap, 149 }; 150 151 static struct regulator_ops axp20x_ops_sw = { 152 .enable = regulator_enable_regmap, 153 .disable = regulator_disable_regmap, 154 .is_enabled = regulator_is_enabled_regmap, 155 }; 156 157 static const struct regulator_linear_range axp20x_ldo4_ranges[] = { 158 REGULATOR_LINEAR_RANGE(1250000, 0x0, 0x0, 0), 159 REGULATOR_LINEAR_RANGE(1300000, 0x1, 0x8, 100000), 160 REGULATOR_LINEAR_RANGE(2500000, 0x9, 0xf, 100000), 161 }; 162 163 static const struct regulator_desc axp20x_regulators[] = { 164 AXP_DESC(AXP20X, DCDC2, "dcdc2", "vin2", 700, 2275, 25, 165 AXP20X_DCDC2_V_OUT, 0x3f, AXP20X_PWR_OUT_CTRL, 0x10), 166 AXP_DESC(AXP20X, DCDC3, "dcdc3", "vin3", 700, 3500, 25, 167 AXP20X_DCDC3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x02), 168 AXP_DESC_FIXED(AXP20X, LDO1, "ldo1", "acin", 1300), 169 AXP_DESC(AXP20X, LDO2, "ldo2", "ldo24in", 1800, 3300, 100, 170 AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04), 171 AXP_DESC(AXP20X, LDO3, "ldo3", "ldo3in", 700, 3500, 25, 172 AXP20X_LDO3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x40), 173 AXP_DESC_RANGES(AXP20X, LDO4, "ldo4", "ldo24in", axp20x_ldo4_ranges, 174 16, AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL, 175 0x08), 176 AXP_DESC_IO(AXP20X, LDO5, "ldo5", "ldo5in", 1800, 3300, 100, 177 AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07, 178 AXP20X_IO_ENABLED, AXP20X_IO_DISABLED), 179 }; 180 181 static const struct regulator_desc axp22x_regulators[] = { 182 AXP_DESC(AXP22X, DCDC1, "dcdc1", "vin1", 1600, 3400, 100, 183 AXP22X_DCDC1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(1)), 184 AXP_DESC(AXP22X, DCDC2, "dcdc2", "vin2", 600, 1540, 20, 185 AXP22X_DCDC2_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(2)), 186 AXP_DESC(AXP22X, DCDC3, "dcdc3", "vin3", 600, 1860, 20, 187 AXP22X_DCDC3_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(3)), 188 AXP_DESC(AXP22X, DCDC4, "dcdc4", "vin4", 600, 1540, 20, 189 AXP22X_DCDC4_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(4)), 190 AXP_DESC(AXP22X, DCDC5, "dcdc5", "vin5", 1000, 2550, 50, 191 AXP22X_DCDC5_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(5)), 192 /* secondary switchable output of DCDC1 */ 193 AXP_DESC_SW(AXP22X, DC1SW, "dc1sw", NULL, AXP22X_PWR_OUT_CTRL2, 194 BIT(7)), 195 /* LDO regulator internally chained to DCDC5 */ 196 AXP_DESC(AXP22X, DC5LDO, "dc5ldo", NULL, 700, 1400, 100, 197 AXP22X_DC5LDO_V_OUT, 0x7, AXP22X_PWR_OUT_CTRL1, BIT(0)), 198 AXP_DESC(AXP22X, ALDO1, "aldo1", "aldoin", 700, 3300, 100, 199 AXP22X_ALDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(6)), 200 AXP_DESC(AXP22X, ALDO2, "aldo2", "aldoin", 700, 3300, 100, 201 AXP22X_ALDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(7)), 202 AXP_DESC(AXP22X, ALDO3, "aldo3", "aldoin", 700, 3300, 100, 203 AXP22X_ALDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL3, BIT(7)), 204 AXP_DESC(AXP22X, DLDO1, "dldo1", "dldoin", 700, 3300, 100, 205 AXP22X_DLDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(3)), 206 AXP_DESC(AXP22X, DLDO2, "dldo2", "dldoin", 700, 3300, 100, 207 AXP22X_DLDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(4)), 208 AXP_DESC(AXP22X, DLDO3, "dldo3", "dldoin", 700, 3300, 100, 209 AXP22X_DLDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(5)), 210 AXP_DESC(AXP22X, DLDO4, "dldo4", "dldoin", 700, 3300, 100, 211 AXP22X_DLDO4_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(6)), 212 AXP_DESC(AXP22X, ELDO1, "eldo1", "eldoin", 700, 3300, 100, 213 AXP22X_ELDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(0)), 214 AXP_DESC(AXP22X, ELDO2, "eldo2", "eldoin", 700, 3300, 100, 215 AXP22X_ELDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(1)), 216 AXP_DESC(AXP22X, ELDO3, "eldo3", "eldoin", 700, 3300, 100, 217 AXP22X_ELDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(2)), 218 AXP_DESC_IO(AXP22X, LDO_IO0, "ldo_io0", "ips", 1800, 3300, 100, 219 AXP22X_LDO_IO0_V_OUT, 0x1f, AXP20X_GPIO0_CTRL, 0x07, 220 AXP22X_IO_ENABLED, AXP22X_IO_DISABLED), 221 AXP_DESC_IO(AXP22X, LDO_IO1, "ldo_io1", "ips", 1800, 3300, 100, 222 AXP22X_LDO_IO1_V_OUT, 0x1f, AXP20X_GPIO1_CTRL, 0x07, 223 AXP22X_IO_ENABLED, AXP22X_IO_DISABLED), 224 AXP_DESC_FIXED(AXP22X, RTC_LDO, "rtc_ldo", "ips", 3000), 225 }; 226 227 static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq) 228 { 229 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); 230 u32 min, max, def, step; 231 232 switch (axp20x->variant) { 233 case AXP202_ID: 234 case AXP209_ID: 235 min = 750; 236 max = 1875; 237 def = 1500; 238 step = 75; 239 break; 240 case AXP221_ID: 241 case AXP223_ID: 242 min = 1800; 243 max = 4050; 244 def = 3000; 245 step = 150; 246 break; 247 default: 248 dev_err(&pdev->dev, 249 "Setting DCDC frequency for unsupported AXP variant\n"); 250 return -EINVAL; 251 } 252 253 if (dcdcfreq == 0) 254 dcdcfreq = def; 255 256 if (dcdcfreq < min) { 257 dcdcfreq = min; 258 dev_warn(&pdev->dev, "DCDC frequency too low. Set to %ukHz\n", 259 min); 260 } 261 262 if (dcdcfreq > max) { 263 dcdcfreq = max; 264 dev_warn(&pdev->dev, "DCDC frequency too high. Set to %ukHz\n", 265 max); 266 } 267 268 dcdcfreq = (dcdcfreq - min) / step; 269 270 return regmap_update_bits(axp20x->regmap, AXP20X_DCDC_FREQ, 271 AXP20X_FREQ_DCDC_MASK, dcdcfreq); 272 } 273 274 static int axp20x_regulator_parse_dt(struct platform_device *pdev) 275 { 276 struct device_node *np, *regulators; 277 int ret; 278 u32 dcdcfreq = 0; 279 280 np = of_node_get(pdev->dev.parent->of_node); 281 if (!np) 282 return 0; 283 284 regulators = of_get_child_by_name(np, "regulators"); 285 if (!regulators) { 286 dev_warn(&pdev->dev, "regulators node not found\n"); 287 } else { 288 of_property_read_u32(regulators, "x-powers,dcdc-freq", &dcdcfreq); 289 ret = axp20x_set_dcdc_freq(pdev, dcdcfreq); 290 if (ret < 0) { 291 dev_err(&pdev->dev, "Error setting dcdc frequency: %d\n", ret); 292 return ret; 293 } 294 295 of_node_put(regulators); 296 } 297 298 return 0; 299 } 300 301 static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode) 302 { 303 struct axp20x_dev *axp20x = rdev_get_drvdata(rdev); 304 unsigned int mask; 305 306 switch (axp20x->variant) { 307 case AXP202_ID: 308 case AXP209_ID: 309 if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3)) 310 return -EINVAL; 311 312 mask = AXP20X_WORKMODE_DCDC2_MASK; 313 if (id == AXP20X_DCDC3) 314 mask = AXP20X_WORKMODE_DCDC3_MASK; 315 316 workmode <<= ffs(mask) - 1; 317 break; 318 319 case AXP221_ID: 320 case AXP223_ID: 321 if (id < AXP22X_DCDC1 || id > AXP22X_DCDC5) 322 return -EINVAL; 323 324 mask = AXP22X_WORKMODE_DCDCX_MASK(id - AXP22X_DCDC1); 325 workmode <<= id - AXP22X_DCDC1; 326 break; 327 328 default: 329 /* should not happen */ 330 WARN_ON(1); 331 return -EINVAL; 332 } 333 334 return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode); 335 } 336 337 static int axp20x_regulator_probe(struct platform_device *pdev) 338 { 339 struct regulator_dev *rdev; 340 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); 341 const struct regulator_desc *regulators; 342 struct regulator_config config = { 343 .dev = pdev->dev.parent, 344 .regmap = axp20x->regmap, 345 .driver_data = axp20x, 346 }; 347 int ret, i, nregulators; 348 u32 workmode; 349 const char *axp22x_dc1_name = axp22x_regulators[AXP22X_DCDC1].name; 350 const char *axp22x_dc5_name = axp22x_regulators[AXP22X_DCDC5].name; 351 352 switch (axp20x->variant) { 353 case AXP202_ID: 354 case AXP209_ID: 355 regulators = axp20x_regulators; 356 nregulators = AXP20X_REG_ID_MAX; 357 break; 358 case AXP221_ID: 359 case AXP223_ID: 360 regulators = axp22x_regulators; 361 nregulators = AXP22X_REG_ID_MAX; 362 break; 363 default: 364 dev_err(&pdev->dev, "Unsupported AXP variant: %ld\n", 365 axp20x->variant); 366 return -EINVAL; 367 } 368 369 /* This only sets the dcdc freq. Ignore any errors */ 370 axp20x_regulator_parse_dt(pdev); 371 372 for (i = 0; i < nregulators; i++) { 373 const struct regulator_desc *desc = ®ulators[i]; 374 struct regulator_desc *new_desc; 375 376 /* 377 * Regulators DC1SW and DC5LDO are connected internally, 378 * so we have to handle their supply names separately. 379 * 380 * We always register the regulators in proper sequence, 381 * so the supply names are correctly read. See the last 382 * part of this loop to see where we save the DT defined 383 * name. 384 */ 385 if (regulators == axp22x_regulators) { 386 if (i == AXP22X_DC1SW) { 387 new_desc = devm_kzalloc(&pdev->dev, 388 sizeof(*desc), 389 GFP_KERNEL); 390 *new_desc = regulators[i]; 391 new_desc->supply_name = axp22x_dc1_name; 392 desc = new_desc; 393 } else if (i == AXP22X_DC5LDO) { 394 new_desc = devm_kzalloc(&pdev->dev, 395 sizeof(*desc), 396 GFP_KERNEL); 397 *new_desc = regulators[i]; 398 new_desc->supply_name = axp22x_dc5_name; 399 desc = new_desc; 400 } 401 } 402 403 rdev = devm_regulator_register(&pdev->dev, desc, &config); 404 if (IS_ERR(rdev)) { 405 dev_err(&pdev->dev, "Failed to register %s\n", 406 regulators[i].name); 407 408 return PTR_ERR(rdev); 409 } 410 411 ret = of_property_read_u32(rdev->dev.of_node, 412 "x-powers,dcdc-workmode", 413 &workmode); 414 if (!ret) { 415 if (axp20x_set_dcdc_workmode(rdev, i, workmode)) 416 dev_err(&pdev->dev, "Failed to set workmode on %s\n", 417 rdev->desc->name); 418 } 419 420 /* 421 * Save AXP22X DCDC1 / DCDC5 regulator names for later. 422 */ 423 if (regulators == axp22x_regulators) { 424 /* Can we use rdev->constraints->name instead? */ 425 if (i == AXP22X_DCDC1) 426 of_property_read_string(rdev->dev.of_node, 427 "regulator-name", 428 &axp22x_dc1_name); 429 else if (i == AXP22X_DCDC5) 430 of_property_read_string(rdev->dev.of_node, 431 "regulator-name", 432 &axp22x_dc5_name); 433 } 434 } 435 436 return 0; 437 } 438 439 static struct platform_driver axp20x_regulator_driver = { 440 .probe = axp20x_regulator_probe, 441 .driver = { 442 .name = "axp20x-regulator", 443 }, 444 }; 445 446 module_platform_driver(axp20x_regulator_driver); 447 448 MODULE_LICENSE("GPL v2"); 449 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>"); 450 MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC"); 451 MODULE_ALIAS("platform:axp20x-regulator"); 452