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 int regulator_get_suspend_value(struct udevice *dev) 88 { 89 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 90 91 if (!ops || !ops->get_suspend_value) 92 return -ENOSYS; 93 94 return ops->get_suspend_value(dev); 95 } 96 97 /* 98 * To be called with at most caution as there is no check 99 * before setting the actual voltage value. 100 */ 101 int regulator_set_value_force(struct udevice *dev, int uV) 102 { 103 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 104 105 if (!ops || !ops->set_value) 106 return -ENOSYS; 107 108 return ops->set_value(dev, uV); 109 } 110 111 int regulator_get_current(struct udevice *dev) 112 { 113 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 114 115 if (!ops || !ops->get_current) 116 return -ENOSYS; 117 118 return ops->get_current(dev); 119 } 120 121 int regulator_set_current(struct udevice *dev, int uA) 122 { 123 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 124 struct dm_regulator_uclass_platdata *uc_pdata; 125 126 uc_pdata = dev_get_uclass_platdata(dev); 127 if (uc_pdata->min_uA != -ENODATA && uA < uc_pdata->min_uA) 128 return -EINVAL; 129 if (uc_pdata->max_uA != -ENODATA && uA > uc_pdata->max_uA) 130 return -EINVAL; 131 132 if (!ops || !ops->set_current) 133 return -ENOSYS; 134 135 return ops->set_current(dev, uA); 136 } 137 138 int regulator_get_enable(struct udevice *dev) 139 { 140 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 141 142 if (!ops || !ops->get_enable) 143 return -ENOSYS; 144 145 return ops->get_enable(dev); 146 } 147 148 int regulator_set_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_enable) 153 return -ENOSYS; 154 155 return ops->set_enable(dev, enable); 156 } 157 158 int regulator_set_suspend_enable(struct udevice *dev, bool enable) 159 { 160 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 161 162 if (!ops || !ops->set_suspend_enable) 163 return -ENOSYS; 164 165 return ops->set_suspend_enable(dev, enable); 166 } 167 168 int regulator_get_suspend_enable(struct udevice *dev) 169 { 170 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 171 172 if (!ops || !ops->get_suspend_enable) 173 return -ENOSYS; 174 175 return ops->get_suspend_enable(dev); 176 } 177 178 int regulator_set_ramp_delay(struct udevice *dev, u32 ramp_delay) 179 { 180 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 181 182 if (!ops || !ops->set_ramp_delay) 183 return -ENOSYS; 184 185 return ops->set_ramp_delay(dev, ramp_delay); 186 } 187 188 int regulator_get_mode(struct udevice *dev) 189 { 190 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 191 192 if (!ops || !ops->get_mode) 193 return -ENOSYS; 194 195 return ops->get_mode(dev); 196 } 197 198 int regulator_set_mode(struct udevice *dev, int mode) 199 { 200 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 201 202 if (!ops || !ops->set_mode) 203 return -ENOSYS; 204 205 return ops->set_mode(dev, mode); 206 } 207 208 int regulator_get_by_platname(const char *plat_name, struct udevice **devp) 209 { 210 struct dm_regulator_uclass_platdata *uc_pdata; 211 struct udevice *dev; 212 int ret; 213 214 *devp = NULL; 215 216 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 217 ret = uclass_find_next_device(&dev)) { 218 if (ret) { 219 debug("regulator %s, ret=%d\n", dev->name, ret); 220 continue; 221 } 222 223 uc_pdata = dev_get_uclass_platdata(dev); 224 if (!uc_pdata || strcmp(plat_name, uc_pdata->name)) 225 continue; 226 227 return uclass_get_device_tail(dev, 0, devp); 228 } 229 230 debug("%s: can't find: %s, ret=%d\n", __func__, plat_name, ret); 231 232 return -ENODEV; 233 } 234 235 int regulator_get_by_devname(const char *devname, struct udevice **devp) 236 { 237 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp); 238 } 239 240 int device_get_supply_regulator(struct udevice *dev, const char *supply_name, 241 struct udevice **devp) 242 { 243 return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, 244 supply_name, devp); 245 } 246 247 static int regulator_init_suspend(struct udevice *dev) 248 { 249 struct dm_regulator_uclass_platdata *uc_pdata; 250 int ret; 251 252 uc_pdata = dev_get_uclass_platdata(dev); 253 254 ret = regulator_set_suspend_enable(dev, uc_pdata->suspend_on); 255 if (!ret && uc_pdata->suspend_on) 256 return regulator_set_suspend_value(dev, uc_pdata->suspend_uV); 257 258 return 0; 259 } 260 261 int regulator_autoset(struct udevice *dev) 262 { 263 struct dm_regulator_uclass_platdata *uc_pdata; 264 int ret = 0; 265 266 uc_pdata = dev_get_uclass_platdata(dev); 267 268 if (uc_pdata->ignore) 269 return ret; 270 271 if (uc_pdata->ramp_delay != -ENODATA) 272 regulator_set_ramp_delay(dev, uc_pdata->ramp_delay); 273 274 if (!uc_pdata->always_on && !uc_pdata->boot_on) 275 return -EMEDIUMTYPE; 276 277 /* 278 * To compatible the old possible failure before adding this code, 279 * ignore the result. 280 */ 281 if (uc_pdata->type == REGULATOR_TYPE_FIXED) { 282 regulator_set_enable(dev, true); 283 return 0; 284 } 285 286 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) { 287 ret = regulator_set_value(dev, uc_pdata->min_uV); 288 } else { 289 if ((uc_pdata->type == REGULATOR_TYPE_BUCK) && 290 (uc_pdata->min_uV != -ENODATA) && 291 (uc_pdata->max_uV != -ENODATA) && 292 (uc_pdata->init_uV <= 0)) 293 printf("%s %d uV\n", 294 uc_pdata->name, regulator_get_value(dev)); 295 } 296 297 if (uc_pdata->init_uV > 0) { 298 ret = regulator_set_value(dev, uc_pdata->init_uV); 299 if (!ret) 300 printf("%s init %d uV\n", 301 uc_pdata->name, uc_pdata->init_uV); 302 } 303 304 if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)) 305 ret = regulator_set_current(dev, uc_pdata->min_uA); 306 307 if (!ret) 308 ret = regulator_set_enable(dev, true); 309 310 return ret; 311 } 312 313 static void regulator_show(struct udevice *dev, int ret) 314 { 315 struct dm_regulator_uclass_platdata *uc_pdata; 316 int uV = 0; 317 318 uc_pdata = dev_get_uclass_platdata(dev); 319 uV = regulator_get_value(dev); 320 321 printf("%25s@%15s: ", dev->name, uc_pdata->name); 322 printf("%7duV <-> %7duV, set %7duV, %s", 323 uc_pdata->min_uV, uc_pdata->max_uV, uV, 324 (uc_pdata->always_on || uc_pdata->boot_on) ? 325 "enabling" : "disabled"); 326 327 printf(" | supsend %7duV, %s", 328 uc_pdata->suspend_uV, 329 uc_pdata->suspend_on ? "enabling" : "disabled"); 330 if (uc_pdata->init_uV != -ENODATA) 331 printf(" ; init %7duV", uc_pdata->init_uV); 332 333 if (ret) 334 printf(" (ret: %d)", ret); 335 336 printf("\n"); 337 } 338 339 int regulator_autoset_by_name(const char *platname, struct udevice **devp) 340 { 341 struct udevice *dev; 342 int ret; 343 344 ret = regulator_get_by_platname(platname, &dev); 345 if (devp) 346 *devp = dev; 347 if (ret) { 348 debug("Can get the regulator: %s (err=%d)\n", platname, ret); 349 return ret; 350 } 351 352 return regulator_autoset(dev); 353 } 354 355 int regulator_list_autoset(const char *list_platname[], 356 struct udevice *list_devp[], 357 bool verbose) 358 { 359 struct udevice *dev; 360 int error = 0, i = 0, ret; 361 362 while (list_platname[i]) { 363 ret = regulator_autoset_by_name(list_platname[i], &dev); 364 if (ret != -EMEDIUMTYPE && verbose) 365 regulator_show(dev, ret); 366 if (ret & !error) 367 error = ret; 368 369 if (list_devp) 370 list_devp[i] = dev; 371 372 i++; 373 } 374 375 return error; 376 } 377 378 static bool regulator_name_is_unique(struct udevice *check_dev, 379 const char *check_name) 380 { 381 struct dm_regulator_uclass_platdata *uc_pdata; 382 struct udevice *dev; 383 int check_len = strlen(check_name); 384 int ret; 385 int len; 386 387 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 388 ret = uclass_find_next_device(&dev)) { 389 if (ret || dev == check_dev) 390 continue; 391 392 uc_pdata = dev_get_uclass_platdata(dev); 393 len = strlen(uc_pdata->name); 394 if (len != check_len) 395 continue; 396 397 if (!strcmp(uc_pdata->name, check_name)) 398 return false; 399 } 400 401 return true; 402 } 403 404 static int regulator_post_bind(struct udevice *dev) 405 { 406 struct dm_regulator_uclass_platdata *uc_pdata; 407 const char *property = "regulator-name"; 408 409 uc_pdata = dev_get_uclass_platdata(dev); 410 411 /* Regulator's mandatory constraint */ 412 uc_pdata->name = dev_read_string(dev, property); 413 if (!uc_pdata->name) { 414 debug("%s: dev '%s' has no property '%s'\n", 415 __func__, dev->name, property); 416 uc_pdata->name = dev_read_name(dev); 417 if (!uc_pdata->name) 418 return -EINVAL; 419 } 420 421 if (regulator_name_is_unique(dev, uc_pdata->name)) 422 return 0; 423 424 debug("'%s' of dev: '%s', has nonunique value: '%s\n", 425 property, dev->name, uc_pdata->name); 426 427 return -EINVAL; 428 } 429 430 static int regulator_pre_probe(struct udevice *dev) 431 { 432 struct dm_regulator_uclass_platdata *uc_pdata; 433 ofnode node; 434 435 uc_pdata = dev_get_uclass_platdata(dev); 436 if (!uc_pdata) 437 return -ENXIO; 438 439 /* Regulator's optional constraints */ 440 uc_pdata->min_uV = dev_read_u32_default(dev, "regulator-min-microvolt", 441 -ENODATA); 442 uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt", 443 -ENODATA); 444 uc_pdata->init_uV = dev_read_u32_default(dev, "regulator-init-microvolt", 445 -ENODATA); 446 uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp", 447 -ENODATA); 448 uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp", 449 -ENODATA); 450 uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on"); 451 uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on"); 452 uc_pdata->ignore = dev_read_bool(dev, "regulator-loader-ignore"); 453 uc_pdata->ramp_delay = dev_read_u32_default(dev, "regulator-ramp-delay", 454 -ENODATA); 455 node = dev_read_subnode(dev, "regulator-state-mem"); 456 if (ofnode_valid(node)) { 457 uc_pdata->suspend_on = !ofnode_read_bool(node, "regulator-off-in-suspend"); 458 if (ofnode_read_u32(node, "regulator-suspend-microvolt", &uc_pdata->suspend_uV)) 459 uc_pdata->suspend_uV = uc_pdata->max_uA; 460 } else { 461 uc_pdata->suspend_on = true; 462 uc_pdata->suspend_uV = uc_pdata->max_uA; 463 } 464 465 /* Those values are optional (-ENODATA if unset) */ 466 if ((uc_pdata->min_uV != -ENODATA) && 467 (uc_pdata->max_uV != -ENODATA) && 468 (uc_pdata->min_uV == uc_pdata->max_uV)) 469 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV; 470 471 /* Those values are optional (-ENODATA if unset) */ 472 if ((uc_pdata->min_uA != -ENODATA) && 473 (uc_pdata->max_uA != -ENODATA) && 474 (uc_pdata->min_uA == uc_pdata->max_uA)) 475 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA; 476 477 debug("dev.name=%s: min_uV=%d, max_uV=%d, boot-on=%d, always-on=%d, " 478 "off-in-suspend=%d, suspend_volt=%d\n", 479 dev->name, uc_pdata->min_uV, uc_pdata->max_uV, uc_pdata->boot_on, 480 uc_pdata->always_on, !uc_pdata->suspend_on, uc_pdata->suspend_uV); 481 482 return 0; 483 } 484 485 int regulators_enable_state_mem(bool verbose) 486 { 487 struct udevice *dev; 488 struct uclass *uc; 489 int ret; 490 491 ret = uclass_get(UCLASS_REGULATOR, &uc); 492 if (ret) 493 return ret; 494 for (uclass_first_device(UCLASS_REGULATOR, &dev); 495 dev; 496 uclass_next_device(&dev)) { 497 ret = regulator_init_suspend(dev); 498 499 if (ret == -EMEDIUMTYPE) 500 ret = 0; 501 if (verbose) 502 regulator_show(dev, ret); 503 if (ret == -ENOSYS) 504 ret = 0; 505 } 506 507 return ret; 508 } 509 510 int regulators_enable_boot_on(bool verbose) 511 { 512 struct udevice *dev; 513 struct uclass *uc; 514 int ret; 515 516 ret = uclass_get(UCLASS_REGULATOR, &uc); 517 if (ret) 518 return ret; 519 for (uclass_first_device(UCLASS_REGULATOR, &dev); 520 dev; 521 uclass_next_device(&dev)) { 522 ret = regulator_autoset(dev); 523 524 if (ret == -EMEDIUMTYPE) 525 ret = 0; 526 if (verbose) 527 regulator_show(dev, ret); 528 if (ret == -ENOSYS) 529 ret = 0; 530 } 531 532 return ret; 533 } 534 535 UCLASS_DRIVER(regulator) = { 536 .id = UCLASS_REGULATOR, 537 .name = "regulator", 538 .post_bind = regulator_post_bind, 539 .pre_probe = regulator_pre_probe, 540 .per_device_platdata_auto_alloc_size = 541 sizeof(struct dm_regulator_uclass_platdata), 542 }; 543