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 46 uc_pdata = dev_get_uclass_platdata(dev); 47 if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV) 48 return -EINVAL; 49 if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV) 50 return -EINVAL; 51 52 if (!ops || !ops->set_value) 53 return -ENOSYS; 54 55 return ops->set_value(dev, uV); 56 } 57 58 /* 59 * To be called with at most caution as there is no check 60 * before setting the actual voltage value. 61 */ 62 int regulator_set_value_force(struct udevice *dev, int uV) 63 { 64 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 65 66 if (!ops || !ops->set_value) 67 return -ENOSYS; 68 69 return ops->set_value(dev, uV); 70 } 71 72 int regulator_get_current(struct udevice *dev) 73 { 74 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 75 76 if (!ops || !ops->get_current) 77 return -ENOSYS; 78 79 return ops->get_current(dev); 80 } 81 82 int regulator_set_current(struct udevice *dev, int uA) 83 { 84 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 85 struct dm_regulator_uclass_platdata *uc_pdata; 86 87 uc_pdata = dev_get_uclass_platdata(dev); 88 if (uc_pdata->min_uA != -ENODATA && uA < uc_pdata->min_uA) 89 return -EINVAL; 90 if (uc_pdata->max_uA != -ENODATA && uA > uc_pdata->max_uA) 91 return -EINVAL; 92 93 if (!ops || !ops->set_current) 94 return -ENOSYS; 95 96 return ops->set_current(dev, uA); 97 } 98 99 int regulator_get_enable(struct udevice *dev) 100 { 101 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 102 103 if (!ops || !ops->get_enable) 104 return -ENOSYS; 105 106 return ops->get_enable(dev); 107 } 108 109 int regulator_set_enable(struct udevice *dev, bool enable) 110 { 111 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 112 113 if (!ops || !ops->set_enable) 114 return -ENOSYS; 115 116 return ops->set_enable(dev, enable); 117 } 118 119 int regulator_get_mode(struct udevice *dev) 120 { 121 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 122 123 if (!ops || !ops->get_mode) 124 return -ENOSYS; 125 126 return ops->get_mode(dev); 127 } 128 129 int regulator_set_mode(struct udevice *dev, int mode) 130 { 131 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 132 133 if (!ops || !ops->set_mode) 134 return -ENOSYS; 135 136 return ops->set_mode(dev, mode); 137 } 138 139 int regulator_get_by_platname(const char *plat_name, struct udevice **devp) 140 { 141 struct dm_regulator_uclass_platdata *uc_pdata; 142 struct udevice *dev; 143 int ret; 144 145 *devp = NULL; 146 147 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 148 ret = uclass_find_next_device(&dev)) { 149 if (ret) { 150 debug("regulator %s, ret=%d\n", dev->name, ret); 151 continue; 152 } 153 154 uc_pdata = dev_get_uclass_platdata(dev); 155 if (!uc_pdata || strcmp(plat_name, uc_pdata->name)) 156 continue; 157 158 return uclass_get_device_tail(dev, 0, devp); 159 } 160 161 debug("%s: can't find: %s, ret=%d\n", __func__, plat_name, ret); 162 163 return -ENODEV; 164 } 165 166 int regulator_get_by_devname(const char *devname, struct udevice **devp) 167 { 168 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp); 169 } 170 171 int device_get_supply_regulator(struct udevice *dev, const char *supply_name, 172 struct udevice **devp) 173 { 174 return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, 175 supply_name, devp); 176 } 177 178 int regulator_autoset(struct udevice *dev) 179 { 180 struct dm_regulator_uclass_platdata *uc_pdata; 181 int ret = 0; 182 183 uc_pdata = dev_get_uclass_platdata(dev); 184 if (!uc_pdata->always_on && !uc_pdata->boot_on) 185 return -EMEDIUMTYPE; 186 187 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 188 ret = regulator_set_value(dev, uc_pdata->min_uV); 189 if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)) 190 ret = regulator_set_current(dev, uc_pdata->min_uA); 191 192 if (!ret) 193 ret = regulator_set_enable(dev, true); 194 195 return ret; 196 } 197 198 static void regulator_show(struct udevice *dev, int ret) 199 { 200 struct dm_regulator_uclass_platdata *uc_pdata; 201 202 uc_pdata = dev_get_uclass_platdata(dev); 203 204 printf("%s@%s: ", dev->name, uc_pdata->name); 205 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 206 printf("set %d uV", uc_pdata->min_uV); 207 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA) 208 printf("; set %d uA", uc_pdata->min_uA); 209 printf("; enabling"); 210 if (ret) 211 printf(" (ret: %d)", ret); 212 printf("\n"); 213 } 214 215 int regulator_autoset_by_name(const char *platname, struct udevice **devp) 216 { 217 struct udevice *dev; 218 int ret; 219 220 ret = regulator_get_by_platname(platname, &dev); 221 if (devp) 222 *devp = dev; 223 if (ret) { 224 debug("Can get the regulator: %s (err=%d)\n", platname, ret); 225 return ret; 226 } 227 228 return regulator_autoset(dev); 229 } 230 231 int regulator_list_autoset(const char *list_platname[], 232 struct udevice *list_devp[], 233 bool verbose) 234 { 235 struct udevice *dev; 236 int error = 0, i = 0, ret; 237 238 while (list_platname[i]) { 239 ret = regulator_autoset_by_name(list_platname[i], &dev); 240 if (ret != -EMEDIUMTYPE && verbose) 241 regulator_show(dev, ret); 242 if (ret & !error) 243 error = ret; 244 245 if (list_devp) 246 list_devp[i] = dev; 247 248 i++; 249 } 250 251 return error; 252 } 253 254 static bool regulator_name_is_unique(struct udevice *check_dev, 255 const char *check_name) 256 { 257 struct dm_regulator_uclass_platdata *uc_pdata; 258 struct udevice *dev; 259 int check_len = strlen(check_name); 260 int ret; 261 int len; 262 263 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 264 ret = uclass_find_next_device(&dev)) { 265 if (ret || dev == check_dev) 266 continue; 267 268 uc_pdata = dev_get_uclass_platdata(dev); 269 len = strlen(uc_pdata->name); 270 if (len != check_len) 271 continue; 272 273 if (!strcmp(uc_pdata->name, check_name)) 274 return false; 275 } 276 277 return true; 278 } 279 280 static int regulator_post_bind(struct udevice *dev) 281 { 282 struct dm_regulator_uclass_platdata *uc_pdata; 283 const char *property = "regulator-name"; 284 285 uc_pdata = dev_get_uclass_platdata(dev); 286 287 /* Regulator's mandatory constraint */ 288 uc_pdata->name = dev_read_string(dev, property); 289 if (!uc_pdata->name) { 290 debug("%s: dev '%s' has no property '%s'\n", 291 __func__, dev->name, property); 292 uc_pdata->name = dev_read_name(dev); 293 if (!uc_pdata->name) 294 return -EINVAL; 295 } 296 297 if (regulator_name_is_unique(dev, uc_pdata->name)) 298 return 0; 299 300 debug("'%s' of dev: '%s', has nonunique value: '%s\n", 301 property, dev->name, uc_pdata->name); 302 303 return -EINVAL; 304 } 305 306 static int regulator_pre_probe(struct udevice *dev) 307 { 308 struct dm_regulator_uclass_platdata *uc_pdata; 309 310 uc_pdata = dev_get_uclass_platdata(dev); 311 if (!uc_pdata) 312 return -ENXIO; 313 314 /* Regulator's optional constraints */ 315 uc_pdata->min_uV = dev_read_u32_default(dev, "regulator-min-microvolt", 316 -ENODATA); 317 uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt", 318 -ENODATA); 319 uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp", 320 -ENODATA); 321 uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp", 322 -ENODATA); 323 uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on"); 324 uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on"); 325 326 /* Those values are optional (-ENODATA if unset) */ 327 if ((uc_pdata->min_uV != -ENODATA) && 328 (uc_pdata->max_uV != -ENODATA) && 329 (uc_pdata->min_uV == uc_pdata->max_uV)) 330 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV; 331 332 /* Those values are optional (-ENODATA if unset) */ 333 if ((uc_pdata->min_uA != -ENODATA) && 334 (uc_pdata->max_uA != -ENODATA) && 335 (uc_pdata->min_uA == uc_pdata->max_uA)) 336 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA; 337 338 return 0; 339 } 340 341 int regulators_enable_boot_on(bool verbose) 342 { 343 struct udevice *dev; 344 struct uclass *uc; 345 int ret; 346 347 ret = uclass_get(UCLASS_REGULATOR, &uc); 348 if (ret) 349 return ret; 350 for (uclass_first_device(UCLASS_REGULATOR, &dev); 351 dev; 352 uclass_next_device(&dev)) { 353 ret = regulator_autoset(dev); 354 if (ret == -EMEDIUMTYPE) { 355 ret = 0; 356 continue; 357 } 358 if (verbose) 359 regulator_show(dev, ret); 360 if (ret == -ENOSYS) 361 ret = 0; 362 } 363 364 return ret; 365 } 366 367 UCLASS_DRIVER(regulator) = { 368 .id = UCLASS_REGULATOR, 369 .name = "regulator", 370 .post_bind = regulator_post_bind, 371 .pre_probe = regulator_pre_probe, 372 .per_device_platdata_auto_alloc_size = 373 sizeof(struct dm_regulator_uclass_platdata), 374 }; 375