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 bool 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 continue; 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\n", __func__, plat_name); 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!", platname); 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