1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2014-2015 Samsung Electronics
4 * Przemyslaw Marczak <p.marczak@samsung.com>
10 #include <dm/uclass-internal.h>
11 #include <power/pmic.h>
12 #include <power/regulator.h>
14 int regulator_mode(struct udevice *dev, struct dm_regulator_mode **modep)
16 struct dm_regulator_uclass_platdata *uc_pdata;
20 uc_pdata = dev_get_uclass_platdata(dev);
24 *modep = uc_pdata->mode;
25 return uc_pdata->mode_count;
28 int regulator_get_value(struct udevice *dev)
30 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
32 if (!ops || !ops->get_value)
35 return ops->get_value(dev);
38 int regulator_set_value(struct udevice *dev, int uV)
40 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
41 struct dm_regulator_uclass_platdata *uc_pdata;
43 uc_pdata = dev_get_uclass_platdata(dev);
44 if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV)
46 if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV)
49 if (!ops || !ops->set_value)
52 return ops->set_value(dev, uV);
56 * To be called with at most caution as there is no check
57 * before setting the actual voltage value.
59 int regulator_set_value_force(struct udevice *dev, int uV)
61 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
63 if (!ops || !ops->set_value)
66 return ops->set_value(dev, uV);
69 int regulator_get_current(struct udevice *dev)
71 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
73 if (!ops || !ops->get_current)
76 return ops->get_current(dev);
79 int regulator_set_current(struct udevice *dev, int uA)
81 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
82 struct dm_regulator_uclass_platdata *uc_pdata;
84 uc_pdata = dev_get_uclass_platdata(dev);
85 if (uc_pdata->min_uA != -ENODATA && uA < uc_pdata->min_uA)
87 if (uc_pdata->max_uA != -ENODATA && uA > uc_pdata->max_uA)
90 if (!ops || !ops->set_current)
93 return ops->set_current(dev, uA);
96 int regulator_get_enable(struct udevice *dev)
98 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
100 if (!ops || !ops->get_enable)
103 return ops->get_enable(dev);
106 int regulator_set_enable(struct udevice *dev, bool enable)
108 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
109 struct dm_regulator_uclass_platdata *uc_pdata;
111 if (!ops || !ops->set_enable)
114 uc_pdata = dev_get_uclass_platdata(dev);
115 if (!enable && uc_pdata->always_on)
118 return ops->set_enable(dev, enable);
121 int regulator_get_mode(struct udevice *dev)
123 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
125 if (!ops || !ops->get_mode)
128 return ops->get_mode(dev);
131 int regulator_set_mode(struct udevice *dev, int mode)
133 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
135 if (!ops || !ops->set_mode)
138 return ops->set_mode(dev, mode);
141 int regulator_get_by_platname(const char *plat_name, struct udevice **devp)
143 struct dm_regulator_uclass_platdata *uc_pdata;
149 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
150 ret = uclass_find_next_device(&dev)) {
152 debug("regulator %s, ret=%d\n", dev->name, ret);
156 uc_pdata = dev_get_uclass_platdata(dev);
157 if (!uc_pdata || strcmp(plat_name, uc_pdata->name))
160 return uclass_get_device_tail(dev, 0, devp);
163 debug("%s: can't find: %s, ret=%d\n", __func__, plat_name, ret);
168 int regulator_get_by_devname(const char *devname, struct udevice **devp)
170 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp);
173 int device_get_supply_regulator(struct udevice *dev, const char *supply_name,
174 struct udevice **devp)
176 return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
180 int regulator_autoset(struct udevice *dev)
182 struct dm_regulator_uclass_platdata *uc_pdata;
185 uc_pdata = dev_get_uclass_platdata(dev);
186 if (!uc_pdata->always_on && !uc_pdata->boot_on)
189 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
190 ret = regulator_set_value(dev, uc_pdata->min_uV);
191 if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA))
192 ret = regulator_set_current(dev, uc_pdata->min_uA);
195 ret = regulator_set_enable(dev, true);
200 static void regulator_show(struct udevice *dev, int ret)
202 struct dm_regulator_uclass_platdata *uc_pdata;
204 uc_pdata = dev_get_uclass_platdata(dev);
206 printf("%s@%s: ", dev->name, uc_pdata->name);
207 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
208 printf("set %d uV", uc_pdata->min_uV);
209 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)
210 printf("; set %d uA", uc_pdata->min_uA);
211 printf("; enabling");
213 printf(" (ret: %d)", ret);
217 int regulator_autoset_by_name(const char *platname, struct udevice **devp)
222 ret = regulator_get_by_platname(platname, &dev);
226 debug("Can get the regulator: %s (err=%d)\n", platname, ret);
230 return regulator_autoset(dev);
233 int regulator_list_autoset(const char *list_platname[],
234 struct udevice *list_devp[],
238 int error = 0, i = 0, ret;
240 while (list_platname[i]) {
241 ret = regulator_autoset_by_name(list_platname[i], &dev);
242 if (ret != -EMEDIUMTYPE && verbose)
243 regulator_show(dev, ret);
256 static bool regulator_name_is_unique(struct udevice *check_dev,
257 const char *check_name)
259 struct dm_regulator_uclass_platdata *uc_pdata;
261 int check_len = strlen(check_name);
265 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
266 ret = uclass_find_next_device(&dev)) {
267 if (ret || dev == check_dev)
270 uc_pdata = dev_get_uclass_platdata(dev);
271 len = strlen(uc_pdata->name);
272 if (len != check_len)
275 if (!strcmp(uc_pdata->name, check_name))
282 static int regulator_post_bind(struct udevice *dev)
284 struct dm_regulator_uclass_platdata *uc_pdata;
285 const char *property = "regulator-name";
287 uc_pdata = dev_get_uclass_platdata(dev);
289 /* Regulator's mandatory constraint */
290 uc_pdata->name = dev_read_string(dev, property);
291 if (!uc_pdata->name) {
292 debug("%s: dev '%s' has no property '%s'\n",
293 __func__, dev->name, property);
294 uc_pdata->name = dev_read_name(dev);
299 if (regulator_name_is_unique(dev, uc_pdata->name))
302 debug("'%s' of dev: '%s', has nonunique value: '%s\n",
303 property, dev->name, uc_pdata->name);
308 static int regulator_pre_probe(struct udevice *dev)
310 struct dm_regulator_uclass_platdata *uc_pdata;
312 uc_pdata = dev_get_uclass_platdata(dev);
316 /* Regulator's optional constraints */
317 uc_pdata->min_uV = dev_read_u32_default(dev, "regulator-min-microvolt",
319 uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt",
321 uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp",
323 uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp",
325 uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on");
326 uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on");
328 /* Those values are optional (-ENODATA if unset) */
329 if ((uc_pdata->min_uV != -ENODATA) &&
330 (uc_pdata->max_uV != -ENODATA) &&
331 (uc_pdata->min_uV == uc_pdata->max_uV))
332 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV;
334 /* Those values are optional (-ENODATA if unset) */
335 if ((uc_pdata->min_uA != -ENODATA) &&
336 (uc_pdata->max_uA != -ENODATA) &&
337 (uc_pdata->min_uA == uc_pdata->max_uA))
338 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA;
343 int regulators_enable_boot_on(bool verbose)
349 ret = uclass_get(UCLASS_REGULATOR, &uc);
352 for (uclass_first_device(UCLASS_REGULATOR, &dev);
354 uclass_next_device(&dev)) {
355 ret = regulator_autoset(dev);
356 if (ret == -EMEDIUMTYPE) {
361 regulator_show(dev, ret);
369 UCLASS_DRIVER(regulator) = {
370 .id = UCLASS_REGULATOR,
372 .post_bind = regulator_post_bind,
373 .pre_probe = regulator_pre_probe,
374 .per_device_platdata_auto_alloc_size =
375 sizeof(struct dm_regulator_uclass_platdata),