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 #include <common.h> 8 #include <fdtdec.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 86 if (!ops || !ops->set_current) 87 return -ENOSYS; 88 89 return ops->set_current(dev, uA); 90 } 91 92 bool regulator_get_enable(struct udevice *dev) 93 { 94 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 95 96 if (!ops || !ops->get_enable) 97 return -ENOSYS; 98 99 return ops->get_enable(dev); 100 } 101 102 int regulator_set_enable(struct udevice *dev, bool enable) 103 { 104 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 105 106 if (!ops || !ops->set_enable) 107 return -ENOSYS; 108 109 return ops->set_enable(dev, enable); 110 } 111 112 int regulator_get_mode(struct udevice *dev) 113 { 114 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 115 116 if (!ops || !ops->get_mode) 117 return -ENOSYS; 118 119 return ops->get_mode(dev); 120 } 121 122 int regulator_set_mode(struct udevice *dev, int mode) 123 { 124 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); 125 126 if (!ops || !ops->set_mode) 127 return -ENOSYS; 128 129 return ops->set_mode(dev, mode); 130 } 131 132 int regulator_get_by_platname(const char *plat_name, struct udevice **devp) 133 { 134 struct dm_regulator_uclass_platdata *uc_pdata; 135 struct udevice *dev; 136 int ret; 137 138 *devp = NULL; 139 140 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 141 ret = uclass_find_next_device(&dev)) { 142 if (ret) 143 continue; 144 145 uc_pdata = dev_get_uclass_platdata(dev); 146 if (!uc_pdata || strcmp(plat_name, uc_pdata->name)) 147 continue; 148 149 return uclass_get_device_tail(dev, 0, devp); 150 } 151 152 debug("%s: can't find: %s\n", __func__, plat_name); 153 154 return -ENODEV; 155 } 156 157 int regulator_get_by_devname(const char *devname, struct udevice **devp) 158 { 159 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp); 160 } 161 162 int device_get_supply_regulator(struct udevice *dev, const char *supply_name, 163 struct udevice **devp) 164 { 165 return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, 166 supply_name, devp); 167 } 168 169 int regulator_autoset(struct udevice *dev) 170 { 171 struct dm_regulator_uclass_platdata *uc_pdata; 172 int ret = 0; 173 174 uc_pdata = dev_get_uclass_platdata(dev); 175 if (!uc_pdata->always_on && !uc_pdata->boot_on) 176 return -EMEDIUMTYPE; 177 178 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 179 ret = regulator_set_value(dev, uc_pdata->min_uV); 180 if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)) 181 ret = regulator_set_current(dev, uc_pdata->min_uA); 182 183 if (!ret) 184 ret = regulator_set_enable(dev, true); 185 186 return ret; 187 } 188 189 static void regulator_show(struct udevice *dev, int ret) 190 { 191 struct dm_regulator_uclass_platdata *uc_pdata; 192 193 uc_pdata = dev_get_uclass_platdata(dev); 194 195 printf("%s@%s: ", dev->name, uc_pdata->name); 196 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) 197 printf("set %d uV", uc_pdata->min_uV); 198 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA) 199 printf("; set %d uA", uc_pdata->min_uA); 200 printf("; enabling"); 201 if (ret) 202 printf(" (ret: %d)", ret); 203 printf("\n"); 204 } 205 206 int regulator_autoset_by_name(const char *platname, struct udevice **devp) 207 { 208 struct udevice *dev; 209 int ret; 210 211 ret = regulator_get_by_platname(platname, &dev); 212 if (devp) 213 *devp = dev; 214 if (ret) { 215 debug("Can get the regulator: %s!", platname); 216 return ret; 217 } 218 219 return regulator_autoset(dev); 220 } 221 222 int regulator_list_autoset(const char *list_platname[], 223 struct udevice *list_devp[], 224 bool verbose) 225 { 226 struct udevice *dev; 227 int error = 0, i = 0, ret; 228 229 while (list_platname[i]) { 230 ret = regulator_autoset_by_name(list_platname[i], &dev); 231 if (ret != -EMEDIUMTYPE && verbose) 232 regulator_show(dev, ret); 233 if (ret & !error) 234 error = ret; 235 236 if (list_devp) 237 list_devp[i] = dev; 238 239 i++; 240 } 241 242 return error; 243 } 244 245 static bool regulator_name_is_unique(struct udevice *check_dev, 246 const char *check_name) 247 { 248 struct dm_regulator_uclass_platdata *uc_pdata; 249 struct udevice *dev; 250 int check_len = strlen(check_name); 251 int ret; 252 int len; 253 254 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; 255 ret = uclass_find_next_device(&dev)) { 256 if (ret || dev == check_dev) 257 continue; 258 259 uc_pdata = dev_get_uclass_platdata(dev); 260 len = strlen(uc_pdata->name); 261 if (len != check_len) 262 continue; 263 264 if (!strcmp(uc_pdata->name, check_name)) 265 return false; 266 } 267 268 return true; 269 } 270 271 static int regulator_post_bind(struct udevice *dev) 272 { 273 struct dm_regulator_uclass_platdata *uc_pdata; 274 int offset = dev->of_offset; 275 const void *blob = gd->fdt_blob; 276 const char *property = "regulator-name"; 277 278 uc_pdata = dev_get_uclass_platdata(dev); 279 if (!uc_pdata) 280 return -ENXIO; 281 282 /* Regulator's mandatory constraint */ 283 uc_pdata->name = fdt_getprop(blob, offset, property, NULL); 284 if (!uc_pdata->name) { 285 debug("%s: dev: %s has no property 'regulator-name'\n", 286 __func__, dev->name); 287 uc_pdata->name = fdt_get_name(blob, offset, NULL); 288 if (!uc_pdata->name) 289 return -EINVAL; 290 } 291 292 if (regulator_name_is_unique(dev, uc_pdata->name)) 293 return 0; 294 295 debug("\"%s\" of dev: \"%s\", has nonunique value: \"%s\"", 296 property, dev->name, uc_pdata->name); 297 298 return -EINVAL; 299 } 300 301 static int regulator_pre_probe(struct udevice *dev) 302 { 303 struct dm_regulator_uclass_platdata *uc_pdata; 304 int offset = dev->of_offset; 305 306 uc_pdata = dev_get_uclass_platdata(dev); 307 if (!uc_pdata) 308 return -ENXIO; 309 310 /* Regulator's optional constraints */ 311 uc_pdata->min_uV = fdtdec_get_int(gd->fdt_blob, offset, 312 "regulator-min-microvolt", -ENODATA); 313 uc_pdata->max_uV = fdtdec_get_int(gd->fdt_blob, offset, 314 "regulator-max-microvolt", -ENODATA); 315 uc_pdata->min_uA = fdtdec_get_int(gd->fdt_blob, offset, 316 "regulator-min-microamp", -ENODATA); 317 uc_pdata->max_uA = fdtdec_get_int(gd->fdt_blob, offset, 318 "regulator-max-microamp", -ENODATA); 319 uc_pdata->always_on = fdtdec_get_bool(gd->fdt_blob, offset, 320 "regulator-always-on"); 321 uc_pdata->boot_on = fdtdec_get_bool(gd->fdt_blob, offset, 322 "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