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_get_mode(struct udevice *dev) 122 { 123 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 124 125 if (!ops || !ops->get_mode) 126 return -ENOSYS; 127 128 return ops->get_mode(dev); 129 } 130 131 int regulator_set_mode(struct udevice *dev, int mode) 132 { 133 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 134 135 if (!ops || !ops->set_mode) 136 return -ENOSYS; 137 138 return ops->set_mode(dev, mode); 139 } 140 141 int regulator_get_by_platname(const char *plat_name, struct udevice **devp) 142 { 143 struct dm_regulator_uclass_platdata *uc_pdata; 144 struct udevice *dev; 145 int ret; 146 147 *devp = NULL; 148 149 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 150 ret = uclass_find_next_device(&dev)) { 151 if (ret) { 152 debug("regulator %s, ret=%d\n", dev->name, ret); 153 continue; 154 } 155 156 uc_pdata = dev_get_uclass_platdata(dev); 157 if (!uc_pdata || strcmp(plat_name, uc_pdata->name)) 158 continue; 159 160 return uclass_get_device_tail(dev, 0, devp); 161 } 162 163 debug("%s: can't find: %s, ret=%d\n", __func__, plat_name, ret); 164 165 return -ENODEV; 166 } 167 168 int regulator_get_by_devname(const char *devname, struct udevice **devp) 169 { 170 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp); 171 } 172 173 int device_get_supply_regulator(struct udevice *dev, const char *supply_name, 174 struct udevice **devp) 175 { 176 return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, 177 supply_name, devp); 178 } 179 180 int regulator_autoset(struct udevice *dev) 181 { 182 struct dm_regulator_uclass_platdata *uc_pdata; 183 int ret = 0; 184 185 uc_pdata = dev_get_uclass_platdata(dev); 186 if (!uc_pdata->always_on && !uc_pdata->boot_on) 187 return -EMEDIUMTYPE; 188 189 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 190 ret = regulator_set_value(dev, uc_pdata->min_uV); 191 if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)) 192 ret = regulator_set_current(dev, uc_pdata->min_uA); 193 194 if (!ret) 195 ret = regulator_set_enable(dev, true); 196 197 return ret; 198 } 199 200 static void regulator_show(struct udevice *dev, int ret) 201 { 202 struct dm_regulator_uclass_platdata *uc_pdata; 203 204 uc_pdata = dev_get_uclass_platdata(dev); 205 206 printf("%s@%s: ", dev->name, uc_pdata->name); 207 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 208 printf("set %d uV", uc_pdata->min_uV); 209 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA) 210 printf("; set %d uA", uc_pdata->min_uA); 211 printf("; enabling"); 212 if (ret) 213 printf(" (ret: %d)", ret); 214 printf("\n"); 215 } 216 217 int regulator_autoset_by_name(const char *platname, struct udevice **devp) 218 { 219 struct udevice *dev; 220 int ret; 221 222 ret = regulator_get_by_platname(platname, &dev); 223 if (devp) 224 *devp = dev; 225 if (ret) { 226 debug("Can get the regulator: %s (err=%d)\n", platname, ret); 227 return ret; 228 } 229 230 return regulator_autoset(dev); 231 } 232 233 int regulator_list_autoset(const char *list_platname[], 234 struct udevice *list_devp[], 235 bool verbose) 236 { 237 struct udevice *dev; 238 int error = 0, i = 0, ret; 239 240 while (list_platname[i]) { 241 ret = regulator_autoset_by_name(list_platname[i], &dev); 242 if (ret != -EMEDIUMTYPE && verbose) 243 regulator_show(dev, ret); 244 if (ret & !error) 245 error = ret; 246 247 if (list_devp) 248 list_devp[i] = dev; 249 250 i++; 251 } 252 253 return error; 254 } 255 256 static bool regulator_name_is_unique(struct udevice *check_dev, 257 const char *check_name) 258 { 259 struct dm_regulator_uclass_platdata *uc_pdata; 260 struct udevice *dev; 261 int check_len = strlen(check_name); 262 int ret; 263 int len; 264 265 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 266 ret = uclass_find_next_device(&dev)) { 267 if (ret || dev == check_dev) 268 continue; 269 270 uc_pdata = dev_get_uclass_platdata(dev); 271 len = strlen(uc_pdata->name); 272 if (len != check_len) 273 continue; 274 275 if (!strcmp(uc_pdata->name, check_name)) 276 return false; 277 } 278 279 return true; 280 } 281 282 static int regulator_post_bind(struct udevice *dev) 283 { 284 struct dm_regulator_uclass_platdata *uc_pdata; 285 const char *property = "regulator-name"; 286 287 uc_pdata = dev_get_uclass_platdata(dev); 288 289 /* Regulator's mandatory constraint */ 290 uc_pdata->name = dev_read_string(dev, property); 291 if (!uc_pdata->name) { 292 debug("%s: dev '%s' has no property '%s'\n", 293 __func__, dev->name, property); 294 uc_pdata->name = dev_read_name(dev); 295 if (!uc_pdata->name) 296 return -EINVAL; 297 } 298 299 if (regulator_name_is_unique(dev, uc_pdata->name)) 300 return 0; 301 302 debug("'%s' of dev: '%s', has nonunique value: '%s\n", 303 property, dev->name, uc_pdata->name); 304 305 return -EINVAL; 306 } 307 308 static int regulator_pre_probe(struct udevice *dev) 309 { 310 struct dm_regulator_uclass_platdata *uc_pdata; 311 312 uc_pdata = dev_get_uclass_platdata(dev); 313 if (!uc_pdata) 314 return -ENXIO; 315 316 /* Regulator's optional constraints */ 317 uc_pdata->min_uV = dev_read_u32_default(dev, "regulator-min-microvolt", 318 -ENODATA); 319 uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt", 320 -ENODATA); 321 uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp", 322 -ENODATA); 323 uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp", 324 -ENODATA); 325 uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on"); 326 uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on"); 327 328 /* Those values are optional (-ENODATA if unset) */ 329 if ((uc_pdata->min_uV != -ENODATA) && 330 (uc_pdata->max_uV != -ENODATA) && 331 (uc_pdata->min_uV == uc_pdata->max_uV)) 332 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV; 333 334 /* Those values are optional (-ENODATA if unset) */ 335 if ((uc_pdata->min_uA != -ENODATA) && 336 (uc_pdata->max_uA != -ENODATA) && 337 (uc_pdata->min_uA == uc_pdata->max_uA)) 338 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA; 339 340 return 0; 341 } 342 343 int regulators_enable_boot_on(bool verbose) 344 { 345 struct udevice *dev; 346 struct uclass *uc; 347 int ret; 348 349 ret = uclass_get(UCLASS_REGULATOR, &uc); 350 if (ret) 351 return ret; 352 for (uclass_first_device(UCLASS_REGULATOR, &dev); 353 dev; 354 uclass_next_device(&dev)) { 355 ret = regulator_autoset(dev); 356 if (ret == -EMEDIUMTYPE) { 357 ret = 0; 358 continue; 359 } 360 if (verbose) 361 regulator_show(dev, ret); 362 if (ret == -ENOSYS) 363 ret = 0; 364 } 365 366 return ret; 367 } 368 369 UCLASS_DRIVER(regulator) = { 370 .id = UCLASS_REGULATOR, 371 .name = "regulator", 372 .post_bind = regulator_post_bind, 373 .pre_probe = regulator_pre_probe, 374 .per_device_platdata_auto_alloc_size = 375 sizeof(struct dm_regulator_uclass_platdata), 376 }; 377