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 ret = regulator_set_suspend_enable(dev, uc_pdata->suspend_on); 238 if (!ret && uc_pdata->suspend_on) 239 ret = regulator_set_suspend_value(dev, uc_pdata->suspend_uV); 240 241 if (!uc_pdata->always_on && !uc_pdata->boot_on) 242 return -EMEDIUMTYPE; 243 244 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 245 ret = regulator_set_value(dev, uc_pdata->min_uV); 246 if (uc_pdata->init_uV > 0) 247 ret = regulator_set_value(dev, uc_pdata->init_uV); 248 if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)) 249 ret = regulator_set_current(dev, uc_pdata->min_uA); 250 251 if (!ret) 252 ret = regulator_set_enable(dev, true); 253 254 return ret; 255 } 256 257 static void regulator_show(struct udevice *dev, int ret) 258 { 259 struct dm_regulator_uclass_platdata *uc_pdata; 260 261 uc_pdata = dev_get_uclass_platdata(dev); 262 263 printf("%s@%s: ", dev->name, uc_pdata->name); 264 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 265 printf("set %d uV", uc_pdata->min_uV); 266 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA) 267 printf("; set %d uA", uc_pdata->min_uA); 268 printf("; enabling"); 269 if (ret) 270 printf(" (ret: %d)", ret); 271 printf("\n"); 272 } 273 274 int regulator_autoset_by_name(const char *platname, struct udevice **devp) 275 { 276 struct udevice *dev; 277 int ret; 278 279 ret = regulator_get_by_platname(platname, &dev); 280 if (devp) 281 *devp = dev; 282 if (ret) { 283 debug("Can get the regulator: %s (err=%d)\n", platname, ret); 284 return ret; 285 } 286 287 return regulator_autoset(dev); 288 } 289 290 int regulator_list_autoset(const char *list_platname[], 291 struct udevice *list_devp[], 292 bool verbose) 293 { 294 struct udevice *dev; 295 int error = 0, i = 0, ret; 296 297 while (list_platname[i]) { 298 ret = regulator_autoset_by_name(list_platname[i], &dev); 299 if (ret != -EMEDIUMTYPE && verbose) 300 regulator_show(dev, ret); 301 if (ret & !error) 302 error = ret; 303 304 if (list_devp) 305 list_devp[i] = dev; 306 307 i++; 308 } 309 310 return error; 311 } 312 313 static bool regulator_name_is_unique(struct udevice *check_dev, 314 const char *check_name) 315 { 316 struct dm_regulator_uclass_platdata *uc_pdata; 317 struct udevice *dev; 318 int check_len = strlen(check_name); 319 int ret; 320 int len; 321 322 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 323 ret = uclass_find_next_device(&dev)) { 324 if (ret || dev == check_dev) 325 continue; 326 327 uc_pdata = dev_get_uclass_platdata(dev); 328 len = strlen(uc_pdata->name); 329 if (len != check_len) 330 continue; 331 332 if (!strcmp(uc_pdata->name, check_name)) 333 return false; 334 } 335 336 return true; 337 } 338 339 static int regulator_post_bind(struct udevice *dev) 340 { 341 struct dm_regulator_uclass_platdata *uc_pdata; 342 const char *property = "regulator-name"; 343 344 uc_pdata = dev_get_uclass_platdata(dev); 345 346 /* Regulator's mandatory constraint */ 347 uc_pdata->name = dev_read_string(dev, property); 348 if (!uc_pdata->name) { 349 debug("%s: dev '%s' has no property '%s'\n", 350 __func__, dev->name, property); 351 uc_pdata->name = dev_read_name(dev); 352 if (!uc_pdata->name) 353 return -EINVAL; 354 } 355 356 if (regulator_name_is_unique(dev, uc_pdata->name)) 357 return 0; 358 359 debug("'%s' of dev: '%s', has nonunique value: '%s\n", 360 property, dev->name, uc_pdata->name); 361 362 return -EINVAL; 363 } 364 365 static int regulator_pre_probe(struct udevice *dev) 366 { 367 struct dm_regulator_uclass_platdata *uc_pdata; 368 ofnode node; 369 370 uc_pdata = dev_get_uclass_platdata(dev); 371 if (!uc_pdata) 372 return -ENXIO; 373 374 /* Regulator's optional constraints */ 375 uc_pdata->min_uV = dev_read_u32_default(dev, "regulator-min-microvolt", 376 -ENODATA); 377 uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt", 378 -ENODATA); 379 uc_pdata->init_uV = dev_read_u32_default(dev, "regulator-init-microvolt", 380 -ENODATA); 381 uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp", 382 -ENODATA); 383 uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp", 384 -ENODATA); 385 uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on"); 386 uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on"); 387 uc_pdata->ramp_delay = dev_read_u32_default(dev, "regulator-ramp-delay", 388 -ENODATA); 389 node = dev_read_subnode(dev, "regulator-state-mem"); 390 if (ofnode_valid(node)) { 391 uc_pdata->suspend_on = !ofnode_read_bool(node, "regulator-off-in-suspend"); 392 if (ofnode_read_u32(node, "regulator-suspend-microvolt", &uc_pdata->suspend_uV)) 393 uc_pdata->suspend_uV = uc_pdata->max_uA; 394 } else { 395 uc_pdata->suspend_on = true; 396 uc_pdata->suspend_uV = uc_pdata->max_uA; 397 } 398 399 /* Those values are optional (-ENODATA if unset) */ 400 if ((uc_pdata->min_uV != -ENODATA) && 401 (uc_pdata->max_uV != -ENODATA) && 402 (uc_pdata->min_uV == uc_pdata->max_uV)) 403 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV; 404 405 /* Those values are optional (-ENODATA if unset) */ 406 if ((uc_pdata->min_uA != -ENODATA) && 407 (uc_pdata->max_uA != -ENODATA) && 408 (uc_pdata->min_uA == uc_pdata->max_uA)) 409 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA; 410 411 debug("dev.name=%s: min_uV=%d, max_uV=%d, boot-on=%d, always-on=%d, " 412 "off-in-suspend=%d, suspend_volt=%d\n", 413 dev->name, uc_pdata->min_uV, uc_pdata->max_uV, uc_pdata->boot_on, 414 uc_pdata->always_on, !uc_pdata->suspend_on, uc_pdata->suspend_uV); 415 416 return 0; 417 } 418 419 int regulators_enable_boot_on(bool verbose) 420 { 421 struct udevice *dev; 422 struct uclass *uc; 423 int ret; 424 425 ret = uclass_get(UCLASS_REGULATOR, &uc); 426 if (ret) 427 return ret; 428 for (uclass_first_device(UCLASS_REGULATOR, &dev); 429 dev; 430 uclass_next_device(&dev)) { 431 ret = regulator_autoset(dev); 432 if (ret == -EMEDIUMTYPE) { 433 ret = 0; 434 continue; 435 } 436 if (verbose) 437 regulator_show(dev, ret); 438 if (ret == -ENOSYS) 439 ret = 0; 440 } 441 442 return ret; 443 } 444 445 UCLASS_DRIVER(regulator) = { 446 .id = UCLASS_REGULATOR, 447 .name = "regulator", 448 .post_bind = regulator_post_bind, 449 .pre_probe = regulator_pre_probe, 450 .per_device_platdata_auto_alloc_size = 451 sizeof(struct dm_regulator_uclass_platdata), 452 }; 453