1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // arizona-ldo1.c -- LDO1 supply for Arizona devices 4 // 5 // Copyright 2012 Wolfson Microelectronics PLC. 6 // 7 // Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 8 9 #include <linux/module.h> 10 #include <linux/moduleparam.h> 11 #include <linux/init.h> 12 #include <linux/bitops.h> 13 #include <linux/err.h> 14 #include <linux/of.h> 15 #include <linux/gpio/consumer.h> 16 #include <linux/platform_device.h> 17 #include <linux/regulator/driver.h> 18 #include <linux/regulator/machine.h> 19 #include <linux/regulator/of_regulator.h> 20 #include <linux/slab.h> 21 22 #include <linux/regulator/arizona-ldo1.h> 23 24 #include <linux/mfd/arizona/core.h> 25 #include <linux/mfd/arizona/pdata.h> 26 #include <linux/mfd/arizona/registers.h> 27 28 #include <linux/mfd/madera/core.h> 29 #include <linux/mfd/madera/pdata.h> 30 #include <linux/mfd/madera/registers.h> 31 32 struct arizona_ldo1 { 33 struct regulator_dev *regulator; 34 struct regmap *regmap; 35 36 struct regulator_consumer_supply supply; 37 struct regulator_init_data init_data; 38 39 struct gpio_desc *ena_gpiod; 40 }; 41 42 static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev, 43 unsigned sel) 44 { 45 struct regmap *regmap = rdev_get_regmap(rdev); 46 unsigned int val; 47 int ret; 48 49 if (sel == rdev->desc->n_voltages - 1) 50 val = ARIZONA_LDO1_HI_PWR; 51 else 52 val = 0; 53 54 ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2, 55 ARIZONA_LDO1_HI_PWR, val); 56 if (ret != 0) 57 return ret; 58 59 if (val) 60 return 0; 61 62 return regulator_set_voltage_sel_regmap(rdev, sel); 63 } 64 65 static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev) 66 { 67 struct regmap *regmap = rdev_get_regmap(rdev); 68 unsigned int val; 69 int ret; 70 71 ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val); 72 if (ret != 0) 73 return ret; 74 75 if (val & ARIZONA_LDO1_HI_PWR) 76 return rdev->desc->n_voltages - 1; 77 78 return regulator_get_voltage_sel_regmap(rdev); 79 } 80 81 static const struct regulator_ops arizona_ldo1_hc_ops = { 82 .list_voltage = regulator_list_voltage_linear_range, 83 .map_voltage = regulator_map_voltage_linear_range, 84 .get_voltage_sel = arizona_ldo1_hc_get_voltage_sel, 85 .set_voltage_sel = arizona_ldo1_hc_set_voltage_sel, 86 .get_bypass = regulator_get_bypass_regmap, 87 .set_bypass = regulator_set_bypass_regmap, 88 }; 89 90 static const struct linear_range arizona_ldo1_hc_ranges[] = { 91 REGULATOR_LINEAR_RANGE(900000, 0, 0x6, 50000), 92 REGULATOR_LINEAR_RANGE(1800000, 0x7, 0x7, 0), 93 }; 94 95 static const struct regulator_desc arizona_ldo1_hc = { 96 .name = "LDO1", 97 .supply_name = "LDOVDD", 98 .type = REGULATOR_VOLTAGE, 99 .ops = &arizona_ldo1_hc_ops, 100 101 .vsel_reg = ARIZONA_LDO1_CONTROL_1, 102 .vsel_mask = ARIZONA_LDO1_VSEL_MASK, 103 .bypass_reg = ARIZONA_LDO1_CONTROL_1, 104 .bypass_mask = ARIZONA_LDO1_BYPASS, 105 .linear_ranges = arizona_ldo1_hc_ranges, 106 .n_linear_ranges = ARRAY_SIZE(arizona_ldo1_hc_ranges), 107 .n_voltages = 8, 108 .enable_time = 1500, 109 .ramp_delay = 24000, 110 111 .owner = THIS_MODULE, 112 }; 113 114 static const struct regulator_ops arizona_ldo1_ops = { 115 .list_voltage = regulator_list_voltage_linear, 116 .map_voltage = regulator_map_voltage_linear, 117 .get_voltage_sel = regulator_get_voltage_sel_regmap, 118 .set_voltage_sel = regulator_set_voltage_sel_regmap, 119 }; 120 121 static const struct regulator_desc arizona_ldo1 = { 122 .name = "LDO1", 123 .supply_name = "LDOVDD", 124 .type = REGULATOR_VOLTAGE, 125 .ops = &arizona_ldo1_ops, 126 127 .vsel_reg = ARIZONA_LDO1_CONTROL_1, 128 .vsel_mask = ARIZONA_LDO1_VSEL_MASK, 129 .min_uV = 900000, 130 .uV_step = 25000, 131 .n_voltages = 13, 132 .enable_time = 500, 133 .ramp_delay = 24000, 134 135 .owner = THIS_MODULE, 136 }; 137 138 static const struct regulator_init_data arizona_ldo1_dvfs = { 139 .constraints = { 140 .min_uV = 1200000, 141 .max_uV = 1800000, 142 .valid_ops_mask = REGULATOR_CHANGE_STATUS | 143 REGULATOR_CHANGE_VOLTAGE, 144 }, 145 .num_consumer_supplies = 1, 146 }; 147 148 static const struct regulator_init_data arizona_ldo1_default = { 149 .constraints = { 150 .valid_ops_mask = REGULATOR_CHANGE_STATUS, 151 }, 152 .num_consumer_supplies = 1, 153 }; 154 155 static const struct regulator_init_data arizona_ldo1_wm5110 = { 156 .constraints = { 157 .min_uV = 1175000, 158 .max_uV = 1200000, 159 .valid_ops_mask = REGULATOR_CHANGE_STATUS | 160 REGULATOR_CHANGE_VOLTAGE, 161 }, 162 .num_consumer_supplies = 1, 163 }; 164 165 static const struct regulator_desc madera_ldo1 = { 166 .name = "LDO1", 167 .supply_name = "LDOVDD", 168 .type = REGULATOR_VOLTAGE, 169 .ops = &arizona_ldo1_ops, 170 171 .vsel_reg = MADERA_LDO1_CONTROL_1, 172 .vsel_mask = MADERA_LDO1_VSEL_MASK, 173 .min_uV = 900000, 174 .uV_step = 25000, 175 .n_voltages = 13, 176 .enable_time = 3000, 177 178 .owner = THIS_MODULE, 179 }; 180 181 static const struct regulator_init_data madera_ldo1_default = { 182 .constraints = { 183 .min_uV = 1200000, 184 .max_uV = 1200000, 185 .valid_ops_mask = REGULATOR_CHANGE_STATUS, 186 }, 187 .num_consumer_supplies = 1, 188 }; 189 190 static int arizona_ldo1_of_get_pdata(struct arizona_ldo1_pdata *pdata, 191 struct regulator_config *config, 192 const struct regulator_desc *desc, 193 bool *external_dcvdd) 194 { 195 struct arizona_ldo1 *ldo1 = config->driver_data; 196 struct device_node *np = config->dev->of_node; 197 struct device_node *init_node, *dcvdd_node; 198 struct regulator_init_data *init_data; 199 200 init_node = of_get_child_by_name(np, "ldo1"); 201 dcvdd_node = of_parse_phandle(np, "DCVDD-supply", 0); 202 203 if (init_node) { 204 config->of_node = init_node; 205 206 init_data = of_get_regulator_init_data(config->dev, init_node, 207 desc); 208 if (init_data) { 209 init_data->consumer_supplies = &ldo1->supply; 210 init_data->num_consumer_supplies = 1; 211 212 if (dcvdd_node && dcvdd_node != init_node) 213 *external_dcvdd = true; 214 215 pdata->init_data = init_data; 216 } 217 } else if (dcvdd_node) { 218 *external_dcvdd = true; 219 } 220 221 of_node_put(dcvdd_node); 222 223 return 0; 224 } 225 226 static int arizona_ldo1_common_init(struct platform_device *pdev, 227 struct arizona_ldo1 *ldo1, 228 const struct regulator_desc *desc, 229 struct arizona_ldo1_pdata *pdata, 230 bool *external_dcvdd) 231 { 232 struct device *parent_dev = pdev->dev.parent; 233 struct regulator_config config = { }; 234 int ret; 235 236 *external_dcvdd = false; 237 238 ldo1->supply.supply = "DCVDD"; 239 ldo1->init_data.consumer_supplies = &ldo1->supply; 240 ldo1->supply.dev_name = dev_name(parent_dev); 241 242 config.dev = parent_dev; 243 config.driver_data = ldo1; 244 config.regmap = ldo1->regmap; 245 246 if (IS_ENABLED(CONFIG_OF)) { 247 if (!dev_get_platdata(parent_dev)) { 248 ret = arizona_ldo1_of_get_pdata(pdata, 249 &config, desc, 250 external_dcvdd); 251 if (ret < 0) 252 return ret; 253 } 254 } 255 256 /* We assume that high output = regulator off 257 * Don't use devm, since we need to get against the parent device 258 * so clean up would happen at the wrong time 259 */ 260 config.ena_gpiod = gpiod_get_optional(parent_dev, "wlf,ldoena", 261 GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE); 262 if (IS_ERR(config.ena_gpiod)) 263 return PTR_ERR(config.ena_gpiod); 264 265 ldo1->ena_gpiod = config.ena_gpiod; 266 267 if (pdata->init_data) 268 config.init_data = pdata->init_data; 269 else 270 config.init_data = &ldo1->init_data; 271 272 /* 273 * LDO1 can only be used to supply DCVDD so if it has no 274 * consumers then DCVDD is supplied externally. 275 */ 276 if (config.init_data->num_consumer_supplies == 0) 277 *external_dcvdd = true; 278 279 ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config); 280 281 of_node_put(config.of_node); 282 283 if (IS_ERR(ldo1->regulator)) { 284 ret = PTR_ERR(ldo1->regulator); 285 dev_err(&pdev->dev, "Failed to register LDO1 supply: %d\n", 286 ret); 287 return ret; 288 } 289 290 platform_set_drvdata(pdev, ldo1); 291 292 return 0; 293 } 294 295 static int arizona_ldo1_probe(struct platform_device *pdev) 296 { 297 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); 298 struct arizona_ldo1 *ldo1; 299 const struct regulator_desc *desc; 300 bool external_dcvdd; 301 int ret; 302 303 ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL); 304 if (!ldo1) 305 return -ENOMEM; 306 307 ldo1->regmap = arizona->regmap; 308 309 /* 310 * Since the chip usually supplies itself we provide some 311 * default init_data for it. This will be overridden with 312 * platform data if provided. 313 */ 314 switch (arizona->type) { 315 case WM5102: 316 case WM8997: 317 case WM8998: 318 case WM1814: 319 desc = &arizona_ldo1_hc; 320 ldo1->init_data = arizona_ldo1_dvfs; 321 break; 322 case WM5110: 323 case WM8280: 324 desc = &arizona_ldo1; 325 ldo1->init_data = arizona_ldo1_wm5110; 326 break; 327 default: 328 desc = &arizona_ldo1; 329 ldo1->init_data = arizona_ldo1_default; 330 break; 331 } 332 333 ret = arizona_ldo1_common_init(pdev, ldo1, desc, 334 &arizona->pdata.ldo1, 335 &external_dcvdd); 336 if (ret == 0) 337 arizona->external_dcvdd = external_dcvdd; 338 339 return ret; 340 } 341 342 static void arizona_ldo1_remove(struct platform_device *pdev) 343 { 344 struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev); 345 346 if (ldo1->ena_gpiod) 347 gpiod_put(ldo1->ena_gpiod); 348 } 349 350 static int madera_ldo1_probe(struct platform_device *pdev) 351 { 352 struct madera *madera = dev_get_drvdata(pdev->dev.parent); 353 struct arizona_ldo1 *ldo1; 354 bool external_dcvdd; 355 int ret; 356 357 ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL); 358 if (!ldo1) 359 return -ENOMEM; 360 361 ldo1->regmap = madera->regmap; 362 363 ldo1->init_data = madera_ldo1_default; 364 365 ret = arizona_ldo1_common_init(pdev, ldo1, &madera_ldo1, 366 &madera->pdata.ldo1, 367 &external_dcvdd); 368 if (ret) 369 return ret; 370 371 madera->internal_dcvdd = !external_dcvdd; 372 373 return 0; 374 } 375 376 static struct platform_driver arizona_ldo1_driver = { 377 .probe = arizona_ldo1_probe, 378 .remove = arizona_ldo1_remove, 379 .driver = { 380 .name = "arizona-ldo1", 381 .probe_type = PROBE_FORCE_SYNCHRONOUS, 382 }, 383 }; 384 385 static struct platform_driver madera_ldo1_driver = { 386 .probe = madera_ldo1_probe, 387 .remove = arizona_ldo1_remove, 388 .driver = { 389 .name = "madera-ldo1", 390 .probe_type = PROBE_FORCE_SYNCHRONOUS, 391 }, 392 }; 393 394 static struct platform_driver * const madera_ldo1_drivers[] = { 395 &arizona_ldo1_driver, 396 &madera_ldo1_driver, 397 }; 398 399 static int __init arizona_ldo1_init(void) 400 { 401 return platform_register_drivers(madera_ldo1_drivers, 402 ARRAY_SIZE(madera_ldo1_drivers)); 403 } 404 module_init(arizona_ldo1_init); 405 406 static void __exit madera_ldo1_exit(void) 407 { 408 platform_unregister_drivers(madera_ldo1_drivers, 409 ARRAY_SIZE(madera_ldo1_drivers)); 410 } 411 module_exit(madera_ldo1_exit); 412 413 /* Module information */ 414 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 415 MODULE_DESCRIPTION("Arizona LDO1 driver"); 416 MODULE_LICENSE("GPL"); 417 MODULE_ALIAS("platform:arizona-ldo1"); 418 MODULE_ALIAS("platform:madera-ldo1"); 419