1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2014-2015 Samsung Electronics 4 * Przemyslaw Marczak <p.marczak@samsung.com> 5 */ 6 7 #include <common.h> 8 #include <errno.h> 9 #include <dm.h> 10 #include <dm/uclass-internal.h> 11 #include <power/pmic.h> 12 #include <power/regulator.h> 13 14 int regulator_mode(struct udevice *dev, struct dm_regulator_mode **modep) 15 { 16 struct dm_regulator_uclass_platdata *uc_pdata; 17 18 *modep = NULL; 19 20 uc_pdata = dev_get_uclass_platdata(dev); 21 if (!uc_pdata) 22 return -ENXIO; 23 24 *modep = uc_pdata->mode; 25 return uc_pdata->mode_count; 26 } 27 28 int regulator_get_value(struct udevice *dev) 29 { 30 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 31 32 if (!ops || !ops->get_value) 33 return -ENOSYS; 34 35 return ops->get_value(dev); 36 } 37 38 int regulator_set_value(struct udevice *dev, int uV) 39 { 40 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 41 struct dm_regulator_uclass_platdata *uc_pdata; 42 43 uc_pdata = dev_get_uclass_platdata(dev); 44 if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV) 45 return -EINVAL; 46 if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV) 47 return -EINVAL; 48 49 if (!ops || !ops->set_value) 50 return -ENOSYS; 51 52 return ops->set_value(dev, uV); 53 } 54 55 /* 56 * To be called with at most caution as there is no check 57 * before setting the actual voltage value. 58 */ 59 int regulator_set_value_force(struct udevice *dev, int uV) 60 { 61 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 62 63 if (!ops || !ops->set_value) 64 return -ENOSYS; 65 66 return ops->set_value(dev, uV); 67 } 68 69 int regulator_get_current(struct udevice *dev) 70 { 71 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 72 73 if (!ops || !ops->get_current) 74 return -ENOSYS; 75 76 return ops->get_current(dev); 77 } 78 79 int regulator_set_current(struct udevice *dev, int uA) 80 { 81 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 82 struct dm_regulator_uclass_platdata *uc_pdata; 83 84 uc_pdata = dev_get_uclass_platdata(dev); 85 if (uc_pdata->min_uA != -ENODATA && uA < uc_pdata->min_uA) 86 return -EINVAL; 87 if (uc_pdata->max_uA != -ENODATA && uA > uc_pdata->max_uA) 88 return -EINVAL; 89 90 if (!ops || !ops->set_current) 91 return -ENOSYS; 92 93 return ops->set_current(dev, uA); 94 } 95 96 int regulator_get_enable(struct udevice *dev) 97 { 98 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 99 100 if (!ops || !ops->get_enable) 101 return -ENOSYS; 102 103 return ops->get_enable(dev); 104 } 105 106 int regulator_set_enable(struct udevice *dev, bool enable) 107 { 108 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 109 110 if (!ops || !ops->set_enable) 111 return -ENOSYS; 112 113 return ops->set_enable(dev, enable); 114 } 115 116 int regulator_get_mode(struct udevice *dev) 117 { 118 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 119 120 if (!ops || !ops->get_mode) 121 return -ENOSYS; 122 123 return ops->get_mode(dev); 124 } 125 126 int regulator_set_mode(struct udevice *dev, int mode) 127 { 128 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 129 130 if (!ops || !ops->set_mode) 131 return -ENOSYS; 132 133 return ops->set_mode(dev, mode); 134 } 135 136 int regulator_get_by_platname(const char *plat_name, struct udevice **devp) 137 { 138 struct dm_regulator_uclass_platdata *uc_pdata; 139 struct udevice *dev; 140 int ret; 141 142 *devp = NULL; 143 144 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 145 ret = uclass_find_next_device(&dev)) { 146 if (ret) { 147 debug("regulator %s, ret=%d\n", dev->name, ret); 148 continue; 149 } 150 151 uc_pdata = dev_get_uclass_platdata(dev); 152 if (!uc_pdata || strcmp(plat_name, uc_pdata->name)) 153 continue; 154 155 return uclass_get_device_tail(dev, 0, devp); 156 } 157 158 debug("%s: can't find: %s, ret=%d\n", __func__, plat_name, ret); 159 160 return -ENODEV; 161 } 162 163 int regulator_get_by_devname(const char *devname, struct udevice **devp) 164 { 165 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp); 166 } 167 168 int device_get_supply_regulator(struct udevice *dev, const char *supply_name, 169 struct udevice **devp) 170 { 171 return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, 172 supply_name, devp); 173 } 174 175 int regulator_autoset(struct udevice *dev) 176 { 177 struct dm_regulator_uclass_platdata *uc_pdata; 178 int ret = 0; 179 180 uc_pdata = dev_get_uclass_platdata(dev); 181 if (!uc_pdata->always_on && !uc_pdata->boot_on) 182 return -EMEDIUMTYPE; 183 184 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 185 ret = regulator_set_value(dev, uc_pdata->min_uV); 186 if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)) 187 ret = regulator_set_current(dev, uc_pdata->min_uA); 188 189 if (!ret) 190 ret = regulator_set_enable(dev, true); 191 192 return ret; 193 } 194 195 static void regulator_show(struct udevice *dev, int ret) 196 { 197 struct dm_regulator_uclass_platdata *uc_pdata; 198 199 uc_pdata = dev_get_uclass_platdata(dev); 200 201 printf("%s@%s: ", dev->name, uc_pdata->name); 202 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 203 printf("set %d uV", uc_pdata->min_uV); 204 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA) 205 printf("; set %d uA", uc_pdata->min_uA); 206 printf("; enabling"); 207 if (ret) 208 printf(" (ret: %d)", ret); 209 printf("\n"); 210 } 211 212 int regulator_autoset_by_name(const char *platname, struct udevice **devp) 213 { 214 struct udevice *dev; 215 int ret; 216 217 ret = regulator_get_by_platname(platname, &dev); 218 if (devp) 219 *devp = dev; 220 if (ret) { 221 debug("Can get the regulator: %s (err=%d)\n", platname, ret); 222 return ret; 223 } 224 225 return regulator_autoset(dev); 226 } 227 228 int regulator_list_autoset(const char *list_platname[], 229 struct udevice *list_devp[], 230 bool verbose) 231 { 232 struct udevice *dev; 233 int error = 0, i = 0, ret; 234 235 while (list_platname[i]) { 236 ret = regulator_autoset_by_name(list_platname[i], &dev); 237 if (ret != -EMEDIUMTYPE && verbose) 238 regulator_show(dev, ret); 239 if (ret & !error) 240 error = ret; 241 242 if (list_devp) 243 list_devp[i] = dev; 244 245 i++; 246 } 247 248 return error; 249 } 250 251 static bool regulator_name_is_unique(struct udevice *check_dev, 252 const char *check_name) 253 { 254 struct dm_regulator_uclass_platdata *uc_pdata; 255 struct udevice *dev; 256 int check_len = strlen(check_name); 257 int ret; 258 int len; 259 260 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 261 ret = uclass_find_next_device(&dev)) { 262 if (ret || dev == check_dev) 263 continue; 264 265 uc_pdata = dev_get_uclass_platdata(dev); 266 len = strlen(uc_pdata->name); 267 if (len != check_len) 268 continue; 269 270 if (!strcmp(uc_pdata->name, check_name)) 271 return false; 272 } 273 274 return true; 275 } 276 277 static int regulator_post_bind(struct udevice *dev) 278 { 279 struct dm_regulator_uclass_platdata *uc_pdata; 280 const char *property = "regulator-name"; 281 282 uc_pdata = dev_get_uclass_platdata(dev); 283 284 /* Regulator's mandatory constraint */ 285 uc_pdata->name = dev_read_string(dev, property); 286 if (!uc_pdata->name) { 287 debug("%s: dev '%s' has no property '%s'\n", 288 __func__, dev->name, property); 289 uc_pdata->name = dev_read_name(dev); 290 if (!uc_pdata->name) 291 return -EINVAL; 292 } 293 294 if (regulator_name_is_unique(dev, uc_pdata->name)) 295 return 0; 296 297 debug("'%s' of dev: '%s', has nonunique value: '%s\n", 298 property, dev->name, uc_pdata->name); 299 300 return -EINVAL; 301 } 302 303 static int regulator_pre_probe(struct udevice *dev) 304 { 305 struct dm_regulator_uclass_platdata *uc_pdata; 306 307 uc_pdata = dev_get_uclass_platdata(dev); 308 if (!uc_pdata) 309 return -ENXIO; 310 311 /* Regulator's optional constraints */ 312 uc_pdata->min_uV = dev_read_u32_default(dev, "regulator-min-microvolt", 313 -ENODATA); 314 uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt", 315 -ENODATA); 316 uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp", 317 -ENODATA); 318 uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp", 319 -ENODATA); 320 uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on"); 321 uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on"); 322 323 /* Those values are optional (-ENODATA if unset) */ 324 if ((uc_pdata->min_uV != -ENODATA) && 325 (uc_pdata->max_uV != -ENODATA) && 326 (uc_pdata->min_uV == uc_pdata->max_uV)) 327 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV; 328 329 /* Those values are optional (-ENODATA if unset) */ 330 if ((uc_pdata->min_uA != -ENODATA) && 331 (uc_pdata->max_uA != -ENODATA) && 332 (uc_pdata->min_uA == uc_pdata->max_uA)) 333 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA; 334 335 return 0; 336 } 337 338 int regulators_enable_boot_on(bool verbose) 339 { 340 struct udevice *dev; 341 struct uclass *uc; 342 int ret; 343 344 ret = uclass_get(UCLASS_REGULATOR, &uc); 345 if (ret) 346 return ret; 347 for (uclass_first_device(UCLASS_REGULATOR, &dev); 348 dev; 349 uclass_next_device(&dev)) { 350 ret = regulator_autoset(dev); 351 if (ret == -EMEDIUMTYPE) { 352 ret = 0; 353 continue; 354 } 355 if (verbose) 356 regulator_show(dev, ret); 357 if (ret == -ENOSYS) 358 ret = 0; 359 } 360 361 return ret; 362 } 363 364 UCLASS_DRIVER(regulator) = { 365 .id = UCLASS_REGULATOR, 366 .name = "regulator", 367 .post_bind = regulator_post_bind, 368 .pre_probe = regulator_pre_probe, 369 .per_device_platdata_auto_alloc_size = 370 sizeof(struct dm_regulator_uclass_platdata), 371 }; 372