2 * Copyright (C) 2014-2015 Samsung Electronics
3 * Przemyslaw Marczak <p.marczak@samsung.com>
5 * SPDX-License-Identifier: GPL-2.0+
11 #include <dm/uclass-internal.h>
12 #include <power/pmic.h>
13 #include <power/regulator.h>
15 DECLARE_GLOBAL_DATA_PTR;
17 int regulator_mode(struct udevice *dev, struct dm_regulator_mode **modep)
19 struct dm_regulator_uclass_platdata *uc_pdata;
23 uc_pdata = dev_get_uclass_platdata(dev);
27 *modep = uc_pdata->mode;
28 return uc_pdata->mode_count;
31 int regulator_get_value(struct udevice *dev)
33 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
35 if (!ops || !ops->get_value)
38 return ops->get_value(dev);
41 int regulator_set_value(struct udevice *dev, int uV)
43 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
45 if (!ops || !ops->set_value)
48 return ops->set_value(dev, uV);
52 * To be called with at most caution as there is no check
53 * before setting the actual voltage value.
55 int regulator_set_value_force(struct udevice *dev, int uV)
57 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
59 if (!ops || !ops->set_value)
62 return ops->set_value(dev, uV);
65 int regulator_get_current(struct udevice *dev)
67 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
69 if (!ops || !ops->get_current)
72 return ops->get_current(dev);
75 int regulator_set_current(struct udevice *dev, int uA)
77 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
79 if (!ops || !ops->set_current)
82 return ops->set_current(dev, uA);
85 bool regulator_get_enable(struct udevice *dev)
87 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
89 if (!ops || !ops->get_enable)
92 return ops->get_enable(dev);
95 int regulator_set_enable(struct udevice *dev, bool enable)
97 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
99 if (!ops || !ops->set_enable)
102 return ops->set_enable(dev, enable);
105 int regulator_get_mode(struct udevice *dev)
107 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
109 if (!ops || !ops->get_mode)
112 return ops->get_mode(dev);
115 int regulator_set_mode(struct udevice *dev, int mode)
117 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
119 if (!ops || !ops->set_mode)
122 return ops->set_mode(dev, mode);
125 int regulator_get_by_platname(const char *plat_name, struct udevice **devp)
127 struct dm_regulator_uclass_platdata *uc_pdata;
133 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
134 ret = uclass_find_next_device(&dev)) {
138 uc_pdata = dev_get_uclass_platdata(dev);
139 if (!uc_pdata || strcmp(plat_name, uc_pdata->name))
142 return uclass_get_device_tail(dev, 0, devp);
145 debug("%s: can't find: %s\n", __func__, plat_name);
150 int regulator_get_by_devname(const char *devname, struct udevice **devp)
152 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp);
155 int device_get_supply_regulator(struct udevice *dev, const char *supply_name,
156 struct udevice **devp)
158 return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
162 int regulator_autoset(struct udevice *dev)
164 struct dm_regulator_uclass_platdata *uc_pdata;
167 uc_pdata = dev_get_uclass_platdata(dev);
168 if (!uc_pdata->always_on && !uc_pdata->boot_on)
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);
177 ret = regulator_set_enable(dev, true);
182 static void regulator_show(struct udevice *dev, int ret)
184 struct dm_regulator_uclass_platdata *uc_pdata;
186 uc_pdata = dev_get_uclass_platdata(dev);
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");
195 printf(" (ret: %d)", ret);
199 int regulator_autoset_by_name(const char *platname, struct udevice **devp)
204 ret = regulator_get_by_platname(platname, &dev);
208 debug("Can get the regulator: %s!", platname);
212 return regulator_autoset(dev);
215 int regulator_list_autoset(const char *list_platname[],
216 struct udevice *list_devp[],
220 int error = 0, i = 0, ret;
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);
238 static bool regulator_name_is_unique(struct udevice *check_dev,
239 const char *check_name)
241 struct dm_regulator_uclass_platdata *uc_pdata;
243 int check_len = strlen(check_name);
247 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
248 ret = uclass_find_next_device(&dev)) {
249 if (ret || dev == check_dev)
252 uc_pdata = dev_get_uclass_platdata(dev);
253 len = strlen(uc_pdata->name);
254 if (len != check_len)
257 if (!strcmp(uc_pdata->name, check_name))
264 static int regulator_post_bind(struct udevice *dev)
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";
271 uc_pdata = dev_get_uclass_platdata(dev);
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);
285 if (regulator_name_is_unique(dev, uc_pdata->name))
288 debug("\"%s\" of dev: \"%s\", has nonunique value: \"%s\"",
289 property, dev->name, uc_pdata->name);
294 static int regulator_pre_probe(struct udevice *dev)
296 struct dm_regulator_uclass_platdata *uc_pdata;
297 int offset = dev->of_offset;
299 uc_pdata = dev_get_uclass_platdata(dev);
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");
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;
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;
332 int regulators_enable_boot_on(bool verbose)
338 ret = uclass_get(UCLASS_REGULATOR, &uc);
341 for (uclass_first_device(UCLASS_REGULATOR, &dev);
343 uclass_next_device(&dev)) {
344 ret = regulator_autoset(dev);
345 if (ret == -EMEDIUMTYPE) {
350 regulator_show(dev, ret);
358 UCLASS_DRIVER(regulator) = {
359 .id = UCLASS_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),