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 u32 old_uV = -ENODATA, us; 46 int ret; 47 48 uc_pdata = dev_get_uclass_platdata(dev); 49 if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV) 50 return -EINVAL; 51 if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV) 52 return -EINVAL; 53 54 if (!ops || !ops->set_value) 55 return -ENOSYS; 56 57 if (uc_pdata->ramp_delay != -ENODATA) { 58 if (!ops->get_value) 59 return -ENOSYS; 60 old_uV = ops->get_value(dev); 61 if (old_uV < 0) 62 return -EINVAL; 63 } 64 65 ret = ops->set_value(dev, uV); 66 67 if (!ret && (old_uV != -ENODATA) && (old_uV != uV)) { 68 us = DIV_ROUND_UP(abs(uV - old_uV), uc_pdata->ramp_delay); 69 udelay(us); 70 debug("%s: ramp=%d, old_uV=%d, uV=%d, us=%d\n", 71 uc_pdata->name, uc_pdata->ramp_delay, old_uV, uV, us); 72 } 73 74 return ret; 75 } 76 77 int regulator_set_suspend_value(struct udevice *dev, int uV) 78 { 79 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 80 81 if (!ops || !ops->set_suspend_value) 82 return -ENOSYS; 83 84 return ops->set_suspend_value(dev, uV); 85 } 86 87 /* 88 * To be called with at most caution as there is no check 89 * before setting the actual voltage value. 90 */ 91 int regulator_set_value_force(struct udevice *dev, int uV) 92 { 93 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 94 95 if (!ops || !ops->set_value) 96 return -ENOSYS; 97 98 return ops->set_value(dev, uV); 99 } 100 101 int regulator_get_current(struct udevice *dev) 102 { 103 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 104 105 if (!ops || !ops->get_current) 106 return -ENOSYS; 107 108 return ops->get_current(dev); 109 } 110 111 int regulator_set_current(struct udevice *dev, int uA) 112 { 113 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 114 struct dm_regulator_uclass_platdata *uc_pdata; 115 116 uc_pdata = dev_get_uclass_platdata(dev); 117 if (uc_pdata->min_uA != -ENODATA && uA < uc_pdata->min_uA) 118 return -EINVAL; 119 if (uc_pdata->max_uA != -ENODATA && uA > uc_pdata->max_uA) 120 return -EINVAL; 121 122 if (!ops || !ops->set_current) 123 return -ENOSYS; 124 125 return ops->set_current(dev, uA); 126 } 127 128 int regulator_get_enable(struct udevice *dev) 129 { 130 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 131 132 if (!ops || !ops->get_enable) 133 return -ENOSYS; 134 135 return ops->get_enable(dev); 136 } 137 138 int regulator_set_enable(struct udevice *dev, bool enable) 139 { 140 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 141 142 if (!ops || !ops->set_enable) 143 return -ENOSYS; 144 145 return ops->set_enable(dev, enable); 146 } 147 148 int regulator_set_suspend_enable(struct udevice *dev, bool enable) 149 { 150 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 151 152 if (!ops || !ops->set_suspend_enable) 153 return -ENOSYS; 154 155 return ops->set_suspend_enable(dev, enable); 156 } 157 158 int regulator_set_ramp_delay(struct udevice *dev, u32 ramp_delay) 159 { 160 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 161 162 if (!ops || !ops->set_ramp_delay) 163 return -ENOSYS; 164 165 return ops->set_ramp_delay(dev, ramp_delay); 166 } 167 168 int regulator_get_mode(struct udevice *dev) 169 { 170 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 171 172 if (!ops || !ops->get_mode) 173 return -ENOSYS; 174 175 return ops->get_mode(dev); 176 } 177 178 int regulator_set_mode(struct udevice *dev, int mode) 179 { 180 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 181 182 if (!ops || !ops->set_mode) 183 return -ENOSYS; 184 185 return ops->set_mode(dev, mode); 186 } 187 188 int regulator_get_by_platname(const char *plat_name, struct udevice **devp) 189 { 190 struct dm_regulator_uclass_platdata *uc_pdata; 191 struct udevice *dev; 192 int ret; 193 194 *devp = NULL; 195 196 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 197 ret = uclass_find_next_device(&dev)) { 198 if (ret) { 199 debug("regulator %s, ret=%d\n", dev->name, ret); 200 continue; 201 } 202 203 uc_pdata = dev_get_uclass_platdata(dev); 204 if (!uc_pdata || strcmp(plat_name, uc_pdata->name)) 205 continue; 206 207 return uclass_get_device_tail(dev, 0, devp); 208 } 209 210 debug("%s: can't find: %s, ret=%d\n", __func__, plat_name, ret); 211 212 return -ENODEV; 213 } 214 215 int regulator_get_by_devname(const char *devname, struct udevice **devp) 216 { 217 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp); 218 } 219 220 int device_get_supply_regulator(struct udevice *dev, const char *supply_name, 221 struct udevice **devp) 222 { 223 return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, 224 supply_name, devp); 225 } 226 227 int regulator_autoset(struct udevice *dev) 228 { 229 struct dm_regulator_uclass_platdata *uc_pdata; 230 int ret = 0; 231 232 uc_pdata = dev_get_uclass_platdata(dev); 233 234 if (uc_pdata->ramp_delay != -ENODATA) 235 regulator_set_ramp_delay(dev, uc_pdata->ramp_delay); 236 237 /* 238 * Suspend configure is not necessary and should not influence normal 239 * configure, so that we set "ret=0" even failed here. 240 */ 241 ret = regulator_set_suspend_enable(dev, uc_pdata->suspend_on); 242 if (!ret && uc_pdata->suspend_on) 243 regulator_set_suspend_value(dev, uc_pdata->suspend_uV); 244 else 245 ret = 0; 246 247 if (!uc_pdata->always_on && !uc_pdata->boot_on) 248 return -EMEDIUMTYPE; 249 250 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 251 ret = regulator_set_value(dev, uc_pdata->min_uV); 252 if (uc_pdata->init_uV > 0) { 253 ret = regulator_set_value(dev, uc_pdata->init_uV); 254 if (!ret) 255 printf("regulator(%s) init %d uV\n", 256 dev->name, uc_pdata->init_uV); 257 } 258 259 if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)) 260 ret = regulator_set_current(dev, uc_pdata->min_uA); 261 262 if (!ret) 263 ret = regulator_set_enable(dev, true); 264 265 return ret; 266 } 267 268 static void regulator_show(struct udevice *dev, int ret) 269 { 270 struct dm_regulator_uclass_platdata *uc_pdata; 271 272 uc_pdata = dev_get_uclass_platdata(dev); 273 274 printf("%s@%s: ", dev->name, uc_pdata->name); 275 printf("%duV <-> %duV, set %duV, %s", 276 uc_pdata->min_uV, uc_pdata->max_uV, uc_pdata->min_uV, 277 (uc_pdata->always_on || uc_pdata->boot_on) ? 278 "enabling" : "not enabling"); 279 if (ret) 280 printf(" (ret: %d)", ret); 281 282 printf("; supsend %duV, %s", 283 uc_pdata->suspend_uV, 284 uc_pdata->suspend_on ? "enabling" : "not enabling"); 285 if (uc_pdata->init_uV != -ENODATA) 286 printf("; init %duV", uc_pdata->init_uV); 287 288 printf("\n"); 289 } 290 291 int regulator_autoset_by_name(const char *platname, struct udevice **devp) 292 { 293 struct udevice *dev; 294 int ret; 295 296 ret = regulator_get_by_platname(platname, &dev); 297 if (devp) 298 *devp = dev; 299 if (ret) { 300 debug("Can get the regulator: %s (err=%d)\n", platname, ret); 301 return ret; 302 } 303 304 return regulator_autoset(dev); 305 } 306 307 int regulator_list_autoset(const char *list_platname[], 308 struct udevice *list_devp[], 309 bool verbose) 310 { 311 struct udevice *dev; 312 int error = 0, i = 0, ret; 313 314 while (list_platname[i]) { 315 ret = regulator_autoset_by_name(list_platname[i], &dev); 316 if (ret != -EMEDIUMTYPE && verbose) 317 regulator_show(dev, ret); 318 if (ret & !error) 319 error = ret; 320 321 if (list_devp) 322 list_devp[i] = dev; 323 324 i++; 325 } 326 327 return error; 328 } 329 330 static bool regulator_name_is_unique(struct udevice *check_dev, 331 const char *check_name) 332 { 333 struct dm_regulator_uclass_platdata *uc_pdata; 334 struct udevice *dev; 335 int check_len = strlen(check_name); 336 int ret; 337 int len; 338 339 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 340 ret = uclass_find_next_device(&dev)) { 341 if (ret || dev == check_dev) 342 continue; 343 344 uc_pdata = dev_get_uclass_platdata(dev); 345 len = strlen(uc_pdata->name); 346 if (len != check_len) 347 continue; 348 349 if (!strcmp(uc_pdata->name, check_name)) 350 return false; 351 } 352 353 return true; 354 } 355 356 static int regulator_post_bind(struct udevice *dev) 357 { 358 struct dm_regulator_uclass_platdata *uc_pdata; 359 const char *property = "regulator-name"; 360 361 uc_pdata = dev_get_uclass_platdata(dev); 362 363 /* Regulator's mandatory constraint */ 364 uc_pdata->name = dev_read_string(dev, property); 365 if (!uc_pdata->name) { 366 debug("%s: dev '%s' has no property '%s'\n", 367 __func__, dev->name, property); 368 uc_pdata->name = dev_read_name(dev); 369 if (!uc_pdata->name) 370 return -EINVAL; 371 } 372 373 if (regulator_name_is_unique(dev, uc_pdata->name)) 374 return 0; 375 376 debug("'%s' of dev: '%s', has nonunique value: '%s\n", 377 property, dev->name, uc_pdata->name); 378 379 return -EINVAL; 380 } 381 382 static int regulator_pre_probe(struct udevice *dev) 383 { 384 struct dm_regulator_uclass_platdata *uc_pdata; 385 ofnode node; 386 387 uc_pdata = dev_get_uclass_platdata(dev); 388 if (!uc_pdata) 389 return -ENXIO; 390 391 /* Regulator's optional constraints */ 392 uc_pdata->min_uV = dev_read_u32_default(dev, "regulator-min-microvolt", 393 -ENODATA); 394 uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt", 395 -ENODATA); 396 uc_pdata->init_uV = dev_read_u32_default(dev, "regulator-init-microvolt", 397 -ENODATA); 398 uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp", 399 -ENODATA); 400 uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp", 401 -ENODATA); 402 uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on"); 403 uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on"); 404 uc_pdata->ramp_delay = dev_read_u32_default(dev, "regulator-ramp-delay", 405 -ENODATA); 406 node = dev_read_subnode(dev, "regulator-state-mem"); 407 if (ofnode_valid(node)) { 408 uc_pdata->suspend_on = !ofnode_read_bool(node, "regulator-off-in-suspend"); 409 if (ofnode_read_u32(node, "regulator-suspend-microvolt", &uc_pdata->suspend_uV)) 410 uc_pdata->suspend_uV = uc_pdata->max_uA; 411 } else { 412 uc_pdata->suspend_on = true; 413 uc_pdata->suspend_uV = uc_pdata->max_uA; 414 } 415 416 /* Those values are optional (-ENODATA if unset) */ 417 if ((uc_pdata->min_uV != -ENODATA) && 418 (uc_pdata->max_uV != -ENODATA) && 419 (uc_pdata->min_uV == uc_pdata->max_uV)) 420 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV; 421 422 /* Those values are optional (-ENODATA if unset) */ 423 if ((uc_pdata->min_uA != -ENODATA) && 424 (uc_pdata->max_uA != -ENODATA) && 425 (uc_pdata->min_uA == uc_pdata->max_uA)) 426 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA; 427 428 debug("dev.name=%s: min_uV=%d, max_uV=%d, boot-on=%d, always-on=%d, " 429 "off-in-suspend=%d, suspend_volt=%d\n", 430 dev->name, uc_pdata->min_uV, uc_pdata->max_uV, uc_pdata->boot_on, 431 uc_pdata->always_on, !uc_pdata->suspend_on, uc_pdata->suspend_uV); 432 433 return 0; 434 } 435 436 int regulators_enable_boot_on(bool verbose) 437 { 438 struct udevice *dev; 439 struct uclass *uc; 440 int ret; 441 442 ret = uclass_get(UCLASS_REGULATOR, &uc); 443 if (ret) 444 return ret; 445 for (uclass_first_device(UCLASS_REGULATOR, &dev); 446 dev; 447 uclass_next_device(&dev)) { 448 ret = regulator_autoset(dev); 449 if (ret == -EMEDIUMTYPE) 450 ret = 0; 451 if (verbose) 452 regulator_show(dev, ret); 453 if (ret == -ENOSYS) 454 ret = 0; 455 } 456 457 return ret; 458 } 459 460 UCLASS_DRIVER(regulator) = { 461 .id = UCLASS_REGULATOR, 462 .name = "regulator", 463 .post_bind = regulator_post_bind, 464 .pre_probe = regulator_pre_probe, 465 .per_device_platdata_auto_alloc_size = 466 sizeof(struct dm_regulator_uclass_platdata), 467 }; 468