1 /* 2 * Copyright (C) 2014-2015 Samsung Electronics 3 * Przemyslaw Marczak <p.marczak@samsung.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <errno.h> 10 #include <dm.h> 11 #include <dm/uclass-internal.h> 12 #include <power/pmic.h> 13 #include <power/regulator.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 int regulator_mode(struct udevice *dev, struct dm_regulator_mode **modep) 18 { 19 struct dm_regulator_uclass_platdata *uc_pdata; 20 21 *modep = NULL; 22 23 uc_pdata = dev_get_uclass_platdata(dev); 24 if (!uc_pdata) 25 return -ENXIO; 26 27 *modep = uc_pdata->mode; 28 return uc_pdata->mode_count; 29 } 30 31 int regulator_get_value(struct udevice *dev) 32 { 33 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 34 35 if (!ops || !ops->get_value) 36 return -ENOSYS; 37 38 return ops->get_value(dev); 39 } 40 41 int regulator_set_value(struct udevice *dev, int uV) 42 { 43 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 44 struct dm_regulator_uclass_platdata *uc_pdata; 45 46 uc_pdata = dev_get_uclass_platdata(dev); 47 if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV) 48 return -EINVAL; 49 if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV) 50 return -EINVAL; 51 52 if (!ops || !ops->set_value) 53 return -ENOSYS; 54 55 return ops->set_value(dev, uV); 56 } 57 58 int regulator_set_suspend_value(struct udevice *dev, int uV) 59 { 60 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 61 62 if (!ops || !ops->set_suspend_value) 63 return -ENOSYS; 64 65 return ops->set_suspend_value(dev, uV); 66 } 67 68 /* 69 * To be called with at most caution as there is no check 70 * before setting the actual voltage value. 71 */ 72 int regulator_set_value_force(struct udevice *dev, int uV) 73 { 74 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 75 76 if (!ops || !ops->set_value) 77 return -ENOSYS; 78 79 return ops->set_value(dev, uV); 80 } 81 82 int regulator_get_current(struct udevice *dev) 83 { 84 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 85 86 if (!ops || !ops->get_current) 87 return -ENOSYS; 88 89 return ops->get_current(dev); 90 } 91 92 int regulator_set_current(struct udevice *dev, int uA) 93 { 94 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 95 struct dm_regulator_uclass_platdata *uc_pdata; 96 97 uc_pdata = dev_get_uclass_platdata(dev); 98 if (uc_pdata->min_uA != -ENODATA && uA < uc_pdata->min_uA) 99 return -EINVAL; 100 if (uc_pdata->max_uA != -ENODATA && uA > uc_pdata->max_uA) 101 return -EINVAL; 102 103 if (!ops || !ops->set_current) 104 return -ENOSYS; 105 106 return ops->set_current(dev, uA); 107 } 108 109 int regulator_get_enable(struct udevice *dev) 110 { 111 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 112 113 if (!ops || !ops->get_enable) 114 return -ENOSYS; 115 116 return ops->get_enable(dev); 117 } 118 119 int regulator_set_enable(struct udevice *dev, bool enable) 120 { 121 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 122 123 if (!ops || !ops->set_enable) 124 return -ENOSYS; 125 126 return ops->set_enable(dev, enable); 127 } 128 129 int regulator_set_suspend_enable(struct udevice *dev, bool enable) 130 { 131 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 132 133 if (!ops || !ops->set_suspend_enable) 134 return -ENOSYS; 135 136 return ops->set_suspend_enable(dev, enable); 137 } 138 139 int regulator_get_mode(struct udevice *dev) 140 { 141 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 142 143 if (!ops || !ops->get_mode) 144 return -ENOSYS; 145 146 return ops->get_mode(dev); 147 } 148 149 int regulator_set_mode(struct udevice *dev, int mode) 150 { 151 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 152 153 if (!ops || !ops->set_mode) 154 return -ENOSYS; 155 156 return ops->set_mode(dev, mode); 157 } 158 159 int regulator_get_by_platname(const char *plat_name, struct udevice **devp) 160 { 161 struct dm_regulator_uclass_platdata *uc_pdata; 162 struct udevice *dev; 163 int ret; 164 165 *devp = NULL; 166 167 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 168 ret = uclass_find_next_device(&dev)) { 169 if (ret) { 170 debug("regulator %s, ret=%d\n", dev->name, ret); 171 continue; 172 } 173 174 uc_pdata = dev_get_uclass_platdata(dev); 175 if (!uc_pdata || strcmp(plat_name, uc_pdata->name)) 176 continue; 177 178 return uclass_get_device_tail(dev, 0, devp); 179 } 180 181 debug("%s: can't find: %s, ret=%d\n", __func__, plat_name, ret); 182 183 return -ENODEV; 184 } 185 186 int regulator_get_by_devname(const char *devname, struct udevice **devp) 187 { 188 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp); 189 } 190 191 int device_get_supply_regulator(struct udevice *dev, const char *supply_name, 192 struct udevice **devp) 193 { 194 return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, 195 supply_name, devp); 196 } 197 198 int regulator_autoset(struct udevice *dev) 199 { 200 struct dm_regulator_uclass_platdata *uc_pdata; 201 int ret = 0; 202 203 uc_pdata = dev_get_uclass_platdata(dev); 204 205 ret = regulator_set_suspend_enable(dev, uc_pdata->suspend_on); 206 if (!ret && uc_pdata->suspend_on) 207 ret = regulator_set_suspend_value(dev, uc_pdata->suspend_uV); 208 209 if (!uc_pdata->always_on && !uc_pdata->boot_on) 210 return -EMEDIUMTYPE; 211 212 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 213 ret = regulator_set_value(dev, uc_pdata->min_uV); 214 if (uc_pdata->init_uV > 0) 215 ret = regulator_set_value(dev, uc_pdata->init_uV); 216 if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)) 217 ret = regulator_set_current(dev, uc_pdata->min_uA); 218 219 if (!ret) 220 ret = regulator_set_enable(dev, true); 221 222 return ret; 223 } 224 225 static void regulator_show(struct udevice *dev, int ret) 226 { 227 struct dm_regulator_uclass_platdata *uc_pdata; 228 229 uc_pdata = dev_get_uclass_platdata(dev); 230 231 printf("%s@%s: ", dev->name, uc_pdata->name); 232 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 233 printf("set %d uV", uc_pdata->min_uV); 234 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA) 235 printf("; set %d uA", uc_pdata->min_uA); 236 printf("; enabling"); 237 if (ret) 238 printf(" (ret: %d)", ret); 239 printf("\n"); 240 } 241 242 int regulator_autoset_by_name(const char *platname, struct udevice **devp) 243 { 244 struct udevice *dev; 245 int ret; 246 247 ret = regulator_get_by_platname(platname, &dev); 248 if (devp) 249 *devp = dev; 250 if (ret) { 251 debug("Can get the regulator: %s (err=%d)\n", platname, ret); 252 return ret; 253 } 254 255 return regulator_autoset(dev); 256 } 257 258 int regulator_list_autoset(const char *list_platname[], 259 struct udevice *list_devp[], 260 bool verbose) 261 { 262 struct udevice *dev; 263 int error = 0, i = 0, ret; 264 265 while (list_platname[i]) { 266 ret = regulator_autoset_by_name(list_platname[i], &dev); 267 if (ret != -EMEDIUMTYPE && verbose) 268 regulator_show(dev, ret); 269 if (ret & !error) 270 error = ret; 271 272 if (list_devp) 273 list_devp[i] = dev; 274 275 i++; 276 } 277 278 return error; 279 } 280 281 static bool regulator_name_is_unique(struct udevice *check_dev, 282 const char *check_name) 283 { 284 struct dm_regulator_uclass_platdata *uc_pdata; 285 struct udevice *dev; 286 int check_len = strlen(check_name); 287 int ret; 288 int len; 289 290 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 291 ret = uclass_find_next_device(&dev)) { 292 if (ret || dev == check_dev) 293 continue; 294 295 uc_pdata = dev_get_uclass_platdata(dev); 296 len = strlen(uc_pdata->name); 297 if (len != check_len) 298 continue; 299 300 if (!strcmp(uc_pdata->name, check_name)) 301 return false; 302 } 303 304 return true; 305 } 306 307 static int regulator_post_bind(struct udevice *dev) 308 { 309 struct dm_regulator_uclass_platdata *uc_pdata; 310 const char *property = "regulator-name"; 311 312 uc_pdata = dev_get_uclass_platdata(dev); 313 314 /* Regulator's mandatory constraint */ 315 uc_pdata->name = dev_read_string(dev, property); 316 if (!uc_pdata->name) { 317 debug("%s: dev '%s' has no property '%s'\n", 318 __func__, dev->name, property); 319 uc_pdata->name = dev_read_name(dev); 320 if (!uc_pdata->name) 321 return -EINVAL; 322 } 323 324 if (regulator_name_is_unique(dev, uc_pdata->name)) 325 return 0; 326 327 debug("'%s' of dev: '%s', has nonunique value: '%s\n", 328 property, dev->name, uc_pdata->name); 329 330 return -EINVAL; 331 } 332 333 static int regulator_pre_probe(struct udevice *dev) 334 { 335 struct dm_regulator_uclass_platdata *uc_pdata; 336 ofnode node; 337 338 uc_pdata = dev_get_uclass_platdata(dev); 339 if (!uc_pdata) 340 return -ENXIO; 341 342 /* Regulator's optional constraints */ 343 uc_pdata->min_uV = dev_read_u32_default(dev, "regulator-min-microvolt", 344 -ENODATA); 345 uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt", 346 -ENODATA); 347 uc_pdata->init_uV = dev_read_u32_default(dev, "regulator-init-microvolt", 348 -ENODATA); 349 uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp", 350 -ENODATA); 351 uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp", 352 -ENODATA); 353 uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on"); 354 uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on"); 355 356 node = dev_read_subnode(dev, "regulator-state-mem"); 357 if (ofnode_valid(node)) { 358 uc_pdata->suspend_on = !ofnode_read_bool(node, "regulator-off-in-suspend"); 359 if (ofnode_read_u32(node, "regulator-suspend-microvolt", &uc_pdata->suspend_uV)) 360 uc_pdata->suspend_uV = uc_pdata->max_uA; 361 } else { 362 uc_pdata->suspend_on = true; 363 uc_pdata->suspend_uV = uc_pdata->max_uA; 364 } 365 366 /* Those values are optional (-ENODATA if unset) */ 367 if ((uc_pdata->min_uV != -ENODATA) && 368 (uc_pdata->max_uV != -ENODATA) && 369 (uc_pdata->min_uV == uc_pdata->max_uV)) 370 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV; 371 372 /* Those values are optional (-ENODATA if unset) */ 373 if ((uc_pdata->min_uA != -ENODATA) && 374 (uc_pdata->max_uA != -ENODATA) && 375 (uc_pdata->min_uA == uc_pdata->max_uA)) 376 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA; 377 378 debug("dev.name=%s: min_uV=%d, max_uV=%d, boot-on=%d, always-on=%d, " 379 "off-in-suspend=%d, suspend_volt=%d\n", 380 dev->name, uc_pdata->min_uV, uc_pdata->max_uV, uc_pdata->boot_on, 381 uc_pdata->always_on, !uc_pdata->suspend_on, uc_pdata->suspend_uV); 382 383 return 0; 384 } 385 386 int regulators_enable_boot_on(bool verbose) 387 { 388 struct udevice *dev; 389 struct uclass *uc; 390 int ret; 391 392 ret = uclass_get(UCLASS_REGULATOR, &uc); 393 if (ret) 394 return ret; 395 for (uclass_first_device(UCLASS_REGULATOR, &dev); 396 dev; 397 uclass_next_device(&dev)) { 398 ret = regulator_autoset(dev); 399 if (ret == -EMEDIUMTYPE) { 400 ret = 0; 401 continue; 402 } 403 if (verbose) 404 regulator_show(dev, ret); 405 if (ret == -ENOSYS) 406 ret = 0; 407 } 408 409 return ret; 410 } 411 412 UCLASS_DRIVER(regulator) = { 413 .id = UCLASS_REGULATOR, 414 .name = "regulator", 415 .post_bind = regulator_post_bind, 416 .pre_probe = regulator_pre_probe, 417 .per_device_platdata_auto_alloc_size = 418 sizeof(struct dm_regulator_uclass_platdata), 419 }; 420