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