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