1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2014-2015 Samsung Electronics 4 * Przemyslaw Marczak <p.marczak@samsung.com> 5 */ 6 7 #include <common.h> 8 #include <errno.h> 9 #include <dm.h> 10 #include <dm/uclass-internal.h> 11 #include <power/pmic.h> 12 #include <power/regulator.h> 13 14 int regulator_mode(struct udevice *dev, struct dm_regulator_mode **modep) 15 { 16 struct dm_regulator_uclass_platdata *uc_pdata; 17 18 *modep = NULL; 19 20 uc_pdata = dev_get_uclass_platdata(dev); 21 if (!uc_pdata) 22 return -ENXIO; 23 24 *modep = uc_pdata->mode; 25 return uc_pdata->mode_count; 26 } 27 28 int regulator_get_value(struct udevice *dev) 29 { 30 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 31 32 if (!ops || !ops->get_value) 33 return -ENOSYS; 34 35 return ops->get_value(dev); 36 } 37 38 int regulator_set_value(struct udevice *dev, int uV) 39 { 40 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 41 struct dm_regulator_uclass_platdata *uc_pdata; 42 43 uc_pdata = dev_get_uclass_platdata(dev); 44 if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV) 45 return -EINVAL; 46 if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV) 47 return -EINVAL; 48 49 if (!ops || !ops->set_value) 50 return -ENOSYS; 51 52 return ops->set_value(dev, uV); 53 } 54 55 /* 56 * To be called with at most caution as there is no check 57 * before setting the actual voltage value. 58 */ 59 int regulator_set_value_force(struct udevice *dev, int uV) 60 { 61 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 62 63 if (!ops || !ops->set_value) 64 return -ENOSYS; 65 66 return ops->set_value(dev, uV); 67 } 68 69 int regulator_get_current(struct udevice *dev) 70 { 71 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 72 73 if (!ops || !ops->get_current) 74 return -ENOSYS; 75 76 return ops->get_current(dev); 77 } 78 79 int regulator_set_current(struct udevice *dev, int uA) 80 { 81 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 82 struct dm_regulator_uclass_platdata *uc_pdata; 83 84 uc_pdata = dev_get_uclass_platdata(dev); 85 if (uc_pdata->min_uA != -ENODATA && uA < uc_pdata->min_uA) 86 return -EINVAL; 87 if (uc_pdata->max_uA != -ENODATA && uA > uc_pdata->max_uA) 88 return -EINVAL; 89 90 if (!ops || !ops->set_current) 91 return -ENOSYS; 92 93 return ops->set_current(dev, uA); 94 } 95 96 int regulator_get_enable(struct udevice *dev) 97 { 98 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 99 100 if (!ops || !ops->get_enable) 101 return -ENOSYS; 102 103 return ops->get_enable(dev); 104 } 105 106 int regulator_set_enable(struct udevice *dev, bool enable) 107 { 108 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 109 struct dm_regulator_uclass_platdata *uc_pdata; 110 111 if (!ops || !ops->set_enable) 112 return -ENOSYS; 113 114 uc_pdata = dev_get_uclass_platdata(dev); 115 if (!enable && uc_pdata->always_on) 116 return -EACCES; 117 118 return ops->set_enable(dev, enable); 119 } 120 121 int regulator_set_enable_if_allowed(struct udevice *dev, bool enable) 122 { 123 int ret; 124 125 ret = regulator_set_enable(dev, enable); 126 if (ret == -ENOSYS || ret == -EACCES) 127 return 0; 128 129 return ret; 130 } 131 132 int regulator_get_mode(struct udevice *dev) 133 { 134 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 135 136 if (!ops || !ops->get_mode) 137 return -ENOSYS; 138 139 return ops->get_mode(dev); 140 } 141 142 int regulator_set_mode(struct udevice *dev, int mode) 143 { 144 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 145 146 if (!ops || !ops->set_mode) 147 return -ENOSYS; 148 149 return ops->set_mode(dev, mode); 150 } 151 152 int regulator_get_by_platname(const char *plat_name, struct udevice **devp) 153 { 154 struct dm_regulator_uclass_platdata *uc_pdata; 155 struct udevice *dev; 156 int ret; 157 158 *devp = NULL; 159 160 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 161 ret = uclass_find_next_device(&dev)) { 162 if (ret) { 163 debug("regulator %s, ret=%d\n", dev->name, ret); 164 continue; 165 } 166 167 uc_pdata = dev_get_uclass_platdata(dev); 168 if (!uc_pdata || strcmp(plat_name, uc_pdata->name)) 169 continue; 170 171 return uclass_get_device_tail(dev, 0, devp); 172 } 173 174 debug("%s: can't find: %s, ret=%d\n", __func__, plat_name, ret); 175 176 return -ENODEV; 177 } 178 179 int regulator_get_by_devname(const char *devname, struct udevice **devp) 180 { 181 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp); 182 } 183 184 int device_get_supply_regulator(struct udevice *dev, const char *supply_name, 185 struct udevice **devp) 186 { 187 return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, 188 supply_name, devp); 189 } 190 191 int regulator_autoset(struct udevice *dev) 192 { 193 struct dm_regulator_uclass_platdata *uc_pdata; 194 int ret = 0; 195 196 uc_pdata = dev_get_uclass_platdata(dev); 197 if (!uc_pdata->always_on && !uc_pdata->boot_on) 198 return -EMEDIUMTYPE; 199 200 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 201 ret = regulator_set_value(dev, uc_pdata->min_uV); 202 if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)) 203 ret = regulator_set_current(dev, uc_pdata->min_uA); 204 205 if (!ret) 206 ret = regulator_set_enable(dev, true); 207 208 return ret; 209 } 210 211 static void regulator_show(struct udevice *dev, int ret) 212 { 213 struct dm_regulator_uclass_platdata *uc_pdata; 214 215 uc_pdata = dev_get_uclass_platdata(dev); 216 217 printf("%s@%s: ", dev->name, uc_pdata->name); 218 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 219 printf("set %d uV", uc_pdata->min_uV); 220 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA) 221 printf("; set %d uA", uc_pdata->min_uA); 222 printf("; enabling"); 223 if (ret) 224 printf(" (ret: %d)", ret); 225 printf("\n"); 226 } 227 228 int regulator_autoset_by_name(const char *platname, struct udevice **devp) 229 { 230 struct udevice *dev; 231 int ret; 232 233 ret = regulator_get_by_platname(platname, &dev); 234 if (devp) 235 *devp = dev; 236 if (ret) { 237 debug("Can get the regulator: %s (err=%d)\n", platname, ret); 238 return ret; 239 } 240 241 return regulator_autoset(dev); 242 } 243 244 int regulator_list_autoset(const char *list_platname[], 245 struct udevice *list_devp[], 246 bool verbose) 247 { 248 struct udevice *dev; 249 int error = 0, i = 0, ret; 250 251 while (list_platname[i]) { 252 ret = regulator_autoset_by_name(list_platname[i], &dev); 253 if (ret != -EMEDIUMTYPE && verbose) 254 regulator_show(dev, ret); 255 if (ret & !error) 256 error = ret; 257 258 if (list_devp) 259 list_devp[i] = dev; 260 261 i++; 262 } 263 264 return error; 265 } 266 267 static bool regulator_name_is_unique(struct udevice *check_dev, 268 const char *check_name) 269 { 270 struct dm_regulator_uclass_platdata *uc_pdata; 271 struct udevice *dev; 272 int check_len = strlen(check_name); 273 int ret; 274 int len; 275 276 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 277 ret = uclass_find_next_device(&dev)) { 278 if (ret || dev == check_dev) 279 continue; 280 281 uc_pdata = dev_get_uclass_platdata(dev); 282 len = strlen(uc_pdata->name); 283 if (len != check_len) 284 continue; 285 286 if (!strcmp(uc_pdata->name, check_name)) 287 return false; 288 } 289 290 return true; 291 } 292 293 static int regulator_post_bind(struct udevice *dev) 294 { 295 struct dm_regulator_uclass_platdata *uc_pdata; 296 const char *property = "regulator-name"; 297 298 uc_pdata = dev_get_uclass_platdata(dev); 299 300 /* Regulator's mandatory constraint */ 301 uc_pdata->name = dev_read_string(dev, property); 302 if (!uc_pdata->name) { 303 debug("%s: dev '%s' has no property '%s'\n", 304 __func__, dev->name, property); 305 uc_pdata->name = dev_read_name(dev); 306 if (!uc_pdata->name) 307 return -EINVAL; 308 } 309 310 if (regulator_name_is_unique(dev, uc_pdata->name)) 311 return 0; 312 313 debug("'%s' of dev: '%s', has nonunique value: '%s\n", 314 property, dev->name, uc_pdata->name); 315 316 return -EINVAL; 317 } 318 319 static int regulator_pre_probe(struct udevice *dev) 320 { 321 struct dm_regulator_uclass_platdata *uc_pdata; 322 323 uc_pdata = dev_get_uclass_platdata(dev); 324 if (!uc_pdata) 325 return -ENXIO; 326 327 /* Regulator's optional constraints */ 328 uc_pdata->min_uV = dev_read_u32_default(dev, "regulator-min-microvolt", 329 -ENODATA); 330 uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt", 331 -ENODATA); 332 uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp", 333 -ENODATA); 334 uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp", 335 -ENODATA); 336 uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on"); 337 uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on"); 338 339 /* Those values are optional (-ENODATA if unset) */ 340 if ((uc_pdata->min_uV != -ENODATA) && 341 (uc_pdata->max_uV != -ENODATA) && 342 (uc_pdata->min_uV == uc_pdata->max_uV)) 343 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV; 344 345 /* Those values are optional (-ENODATA if unset) */ 346 if ((uc_pdata->min_uA != -ENODATA) && 347 (uc_pdata->max_uA != -ENODATA) && 348 (uc_pdata->min_uA == uc_pdata->max_uA)) 349 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA; 350 351 return 0; 352 } 353 354 int regulators_enable_boot_on(bool verbose) 355 { 356 struct udevice *dev; 357 struct uclass *uc; 358 int ret; 359 360 ret = uclass_get(UCLASS_REGULATOR, &uc); 361 if (ret) 362 return ret; 363 for (uclass_first_device(UCLASS_REGULATOR, &dev); 364 dev; 365 uclass_next_device(&dev)) { 366 ret = regulator_autoset(dev); 367 if (ret == -EMEDIUMTYPE) { 368 ret = 0; 369 continue; 370 } 371 if (verbose) 372 regulator_show(dev, ret); 373 if (ret == -ENOSYS) 374 ret = 0; 375 } 376 377 return ret; 378 } 379 380 UCLASS_DRIVER(regulator) = { 381 .id = UCLASS_REGULATOR, 382 .name = "regulator", 383 .post_bind = regulator_post_bind, 384 .pre_probe = regulator_pre_probe, 385 .per_device_platdata_auto_alloc_size = 386 sizeof(struct dm_regulator_uclass_platdata), 387 }; 388