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