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 (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)) 215 ret = regulator_set_current(dev, uc_pdata->min_uA); 216 217 if (!ret) 218 ret = regulator_set_enable(dev, true); 219 220 return ret; 221 } 222 223 static void regulator_show(struct udevice *dev, int ret) 224 { 225 struct dm_regulator_uclass_platdata *uc_pdata; 226 227 uc_pdata = dev_get_uclass_platdata(dev); 228 229 printf("%s@%s: ", dev->name, uc_pdata->name); 230 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 231 printf("set %d uV", uc_pdata->min_uV); 232 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA) 233 printf("; set %d uA", uc_pdata->min_uA); 234 printf("; enabling"); 235 if (ret) 236 printf(" (ret: %d)", ret); 237 printf("\n"); 238 } 239 240 int regulator_autoset_by_name(const char *platname, struct udevice **devp) 241 { 242 struct udevice *dev; 243 int ret; 244 245 ret = regulator_get_by_platname(platname, &dev); 246 if (devp) 247 *devp = dev; 248 if (ret) { 249 debug("Can get the regulator: %s (err=%d)\n", platname, ret); 250 return ret; 251 } 252 253 return regulator_autoset(dev); 254 } 255 256 int regulator_list_autoset(const char *list_platname[], 257 struct udevice *list_devp[], 258 bool verbose) 259 { 260 struct udevice *dev; 261 int error = 0, i = 0, ret; 262 263 while (list_platname[i]) { 264 ret = regulator_autoset_by_name(list_platname[i], &dev); 265 if (ret != -EMEDIUMTYPE && verbose) 266 regulator_show(dev, ret); 267 if (ret & !error) 268 error = ret; 269 270 if (list_devp) 271 list_devp[i] = dev; 272 273 i++; 274 } 275 276 return error; 277 } 278 279 static bool regulator_name_is_unique(struct udevice *check_dev, 280 const char *check_name) 281 { 282 struct dm_regulator_uclass_platdata *uc_pdata; 283 struct udevice *dev; 284 int check_len = strlen(check_name); 285 int ret; 286 int len; 287 288 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 289 ret = uclass_find_next_device(&dev)) { 290 if (ret || dev == check_dev) 291 continue; 292 293 uc_pdata = dev_get_uclass_platdata(dev); 294 len = strlen(uc_pdata->name); 295 if (len != check_len) 296 continue; 297 298 if (!strcmp(uc_pdata->name, check_name)) 299 return false; 300 } 301 302 return true; 303 } 304 305 static int regulator_post_bind(struct udevice *dev) 306 { 307 struct dm_regulator_uclass_platdata *uc_pdata; 308 const char *property = "regulator-name"; 309 310 uc_pdata = dev_get_uclass_platdata(dev); 311 312 /* Regulator's mandatory constraint */ 313 uc_pdata->name = dev_read_string(dev, property); 314 if (!uc_pdata->name) { 315 debug("%s: dev '%s' has no property '%s'\n", 316 __func__, dev->name, property); 317 uc_pdata->name = dev_read_name(dev); 318 if (!uc_pdata->name) 319 return -EINVAL; 320 } 321 322 if (regulator_name_is_unique(dev, uc_pdata->name)) 323 return 0; 324 325 debug("'%s' of dev: '%s', has nonunique value: '%s\n", 326 property, dev->name, uc_pdata->name); 327 328 return -EINVAL; 329 } 330 331 static int regulator_pre_probe(struct udevice *dev) 332 { 333 struct dm_regulator_uclass_platdata *uc_pdata; 334 ofnode node; 335 336 uc_pdata = dev_get_uclass_platdata(dev); 337 if (!uc_pdata) 338 return -ENXIO; 339 340 /* Regulator's optional constraints */ 341 uc_pdata->min_uV = dev_read_u32_default(dev, "regulator-min-microvolt", 342 -ENODATA); 343 uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt", 344 -ENODATA); 345 uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp", 346 -ENODATA); 347 uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp", 348 -ENODATA); 349 uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on"); 350 uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on"); 351 352 node = dev_read_subnode(dev, "regulator-state-mem"); 353 if (ofnode_valid(node)) { 354 uc_pdata->suspend_on = !ofnode_read_bool(node, "regulator-off-in-suspend"); 355 if (ofnode_read_u32(node, "regulator-suspend-microvolt", &uc_pdata->suspend_uV)) 356 uc_pdata->suspend_uV = uc_pdata->max_uA; 357 } else { 358 uc_pdata->suspend_on = true; 359 uc_pdata->suspend_uV = uc_pdata->max_uA; 360 } 361 362 /* Those values are optional (-ENODATA if unset) */ 363 if ((uc_pdata->min_uV != -ENODATA) && 364 (uc_pdata->max_uV != -ENODATA) && 365 (uc_pdata->min_uV == uc_pdata->max_uV)) 366 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV; 367 368 /* Those values are optional (-ENODATA if unset) */ 369 if ((uc_pdata->min_uA != -ENODATA) && 370 (uc_pdata->max_uA != -ENODATA) && 371 (uc_pdata->min_uA == uc_pdata->max_uA)) 372 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA; 373 374 debug("dev.name=%s: min_uV=%d, max_uV=%d, boot-on=%d, always-on=%d, " 375 "off-in-suspend=%d, suspend_volt=%d\n", 376 dev->name, uc_pdata->min_uV, uc_pdata->max_uV, uc_pdata->boot_on, 377 uc_pdata->always_on, !uc_pdata->suspend_on, uc_pdata->suspend_uV); 378 379 return 0; 380 } 381 382 int regulators_enable_boot_on(bool verbose) 383 { 384 struct udevice *dev; 385 struct uclass *uc; 386 int ret; 387 388 ret = uclass_get(UCLASS_REGULATOR, &uc); 389 if (ret) 390 return ret; 391 for (uclass_first_device(UCLASS_REGULATOR, &dev); 392 dev; 393 uclass_next_device(&dev)) { 394 ret = regulator_autoset(dev); 395 if (ret == -EMEDIUMTYPE) { 396 ret = 0; 397 continue; 398 } 399 if (verbose) 400 regulator_show(dev, ret); 401 if (ret == -ENOSYS) 402 ret = 0; 403 } 404 405 return ret; 406 } 407 408 UCLASS_DRIVER(regulator) = { 409 .id = UCLASS_REGULATOR, 410 .name = "regulator", 411 .post_bind = regulator_post_bind, 412 .pre_probe = regulator_pre_probe, 413 .per_device_platdata_auto_alloc_size = 414 sizeof(struct dm_regulator_uclass_platdata), 415 }; 416