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 static void regulator_set_value_ramp_delay(struct udevice *dev, int old_uV,
39 int new_uV, unsigned int ramp_delay)
41 int delay = DIV_ROUND_UP(abs(new_uV - old_uV), ramp_delay);
43 debug("regulator %s: delay %u us (%d uV -> %d uV)\n", dev->name, delay,
49 int regulator_set_value(struct udevice *dev, int uV)
51 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
52 struct dm_regulator_uclass_platdata *uc_pdata;
53 int ret, old_uV = uV, is_enabled = 0;
55 uc_pdata = dev_get_uclass_platdata(dev);
56 if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV)
58 if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV)
61 if (!ops || !ops->set_value)
64 if (uc_pdata->ramp_delay) {
65 is_enabled = regulator_get_enable(dev);
66 old_uV = regulator_get_value(dev);
69 ret = ops->set_value(dev, uV);
72 if (uc_pdata->ramp_delay && old_uV > 0 && is_enabled)
73 regulator_set_value_ramp_delay(dev, old_uV, uV,
74 uc_pdata->ramp_delay);
81 * To be called with at most caution as there is no check
82 * before setting the actual voltage value.
84 int regulator_set_value_force(struct udevice *dev, int uV)
86 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
88 if (!ops || !ops->set_value)
91 return ops->set_value(dev, uV);
94 int regulator_get_current(struct udevice *dev)
96 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
98 if (!ops || !ops->get_current)
101 return ops->get_current(dev);
104 int regulator_set_current(struct udevice *dev, int uA)
106 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
107 struct dm_regulator_uclass_platdata *uc_pdata;
109 uc_pdata = dev_get_uclass_platdata(dev);
110 if (uc_pdata->min_uA != -ENODATA && uA < uc_pdata->min_uA)
112 if (uc_pdata->max_uA != -ENODATA && uA > uc_pdata->max_uA)
115 if (!ops || !ops->set_current)
118 return ops->set_current(dev, uA);
121 int regulator_get_enable(struct udevice *dev)
123 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
125 if (!ops || !ops->get_enable)
128 return ops->get_enable(dev);
131 int regulator_set_enable(struct udevice *dev, bool enable)
133 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
134 struct dm_regulator_uclass_platdata *uc_pdata;
135 int ret, old_enable = 0;
137 if (!ops || !ops->set_enable)
140 uc_pdata = dev_get_uclass_platdata(dev);
141 if (!enable && uc_pdata->always_on)
144 if (uc_pdata->ramp_delay)
145 old_enable = regulator_get_enable(dev);
147 ret = ops->set_enable(dev, enable);
149 if (uc_pdata->ramp_delay && !old_enable && enable) {
150 int uV = regulator_get_value(dev);
153 regulator_set_value_ramp_delay(dev, 0, uV,
154 uc_pdata->ramp_delay);
162 int regulator_set_enable_if_allowed(struct udevice *dev, bool enable)
166 ret = regulator_set_enable(dev, enable);
167 if (ret == -ENOSYS || ret == -EACCES)
173 int regulator_get_mode(struct udevice *dev)
175 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
177 if (!ops || !ops->get_mode)
180 return ops->get_mode(dev);
183 int regulator_set_mode(struct udevice *dev, int mode)
185 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
187 if (!ops || !ops->set_mode)
190 return ops->set_mode(dev, mode);
193 int regulator_get_by_platname(const char *plat_name, struct udevice **devp)
195 struct dm_regulator_uclass_platdata *uc_pdata;
201 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
202 ret = uclass_find_next_device(&dev)) {
204 debug("regulator %s, ret=%d\n", dev->name, ret);
208 uc_pdata = dev_get_uclass_platdata(dev);
209 if (!uc_pdata || strcmp(plat_name, uc_pdata->name))
212 return uclass_get_device_tail(dev, 0, devp);
215 debug("%s: can't find: %s, ret=%d\n", __func__, plat_name, ret);
220 int regulator_get_by_devname(const char *devname, struct udevice **devp)
222 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp);
225 int device_get_supply_regulator(struct udevice *dev, const char *supply_name,
226 struct udevice **devp)
228 return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
232 int regulator_autoset(struct udevice *dev)
234 struct dm_regulator_uclass_platdata *uc_pdata;
237 uc_pdata = dev_get_uclass_platdata(dev);
238 if (!uc_pdata->always_on && !uc_pdata->boot_on)
241 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
242 ret = regulator_set_value(dev, uc_pdata->min_uV);
243 if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA))
244 ret = regulator_set_current(dev, uc_pdata->min_uA);
247 ret = regulator_set_enable(dev, true);
252 static void regulator_show(struct udevice *dev, int ret)
254 struct dm_regulator_uclass_platdata *uc_pdata;
256 uc_pdata = dev_get_uclass_platdata(dev);
258 printf("%s@%s: ", dev->name, uc_pdata->name);
259 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
260 printf("set %d uV", uc_pdata->min_uV);
261 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)
262 printf("; set %d uA", uc_pdata->min_uA);
263 printf("; enabling");
265 printf(" (ret: %d)", ret);
269 int regulator_autoset_by_name(const char *platname, struct udevice **devp)
274 ret = regulator_get_by_platname(platname, &dev);
278 debug("Can get the regulator: %s (err=%d)\n", platname, ret);
282 return regulator_autoset(dev);
285 int regulator_list_autoset(const char *list_platname[],
286 struct udevice *list_devp[],
290 int error = 0, i = 0, ret;
292 while (list_platname[i]) {
293 ret = regulator_autoset_by_name(list_platname[i], &dev);
294 if (ret != -EMEDIUMTYPE && verbose)
295 regulator_show(dev, ret);
308 static bool regulator_name_is_unique(struct udevice *check_dev,
309 const char *check_name)
311 struct dm_regulator_uclass_platdata *uc_pdata;
313 int check_len = strlen(check_name);
317 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
318 ret = uclass_find_next_device(&dev)) {
319 if (ret || dev == check_dev)
322 uc_pdata = dev_get_uclass_platdata(dev);
323 len = strlen(uc_pdata->name);
324 if (len != check_len)
327 if (!strcmp(uc_pdata->name, check_name))
334 static int regulator_post_bind(struct udevice *dev)
336 struct dm_regulator_uclass_platdata *uc_pdata;
337 const char *property = "regulator-name";
339 uc_pdata = dev_get_uclass_platdata(dev);
341 /* Regulator's mandatory constraint */
342 uc_pdata->name = dev_read_string(dev, property);
343 if (!uc_pdata->name) {
344 debug("%s: dev '%s' has no property '%s'\n",
345 __func__, dev->name, property);
346 uc_pdata->name = dev_read_name(dev);
351 if (regulator_name_is_unique(dev, uc_pdata->name))
354 debug("'%s' of dev: '%s', has nonunique value: '%s\n",
355 property, dev->name, uc_pdata->name);
360 static int regulator_pre_probe(struct udevice *dev)
362 struct dm_regulator_uclass_platdata *uc_pdata;
364 uc_pdata = dev_get_uclass_platdata(dev);
368 /* Regulator's optional constraints */
369 uc_pdata->min_uV = dev_read_u32_default(dev, "regulator-min-microvolt",
371 uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt",
373 uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp",
375 uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp",
377 uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on");
378 uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on");
379 uc_pdata->ramp_delay = dev_read_u32_default(dev, "regulator-ramp-delay",
382 /* Those values are optional (-ENODATA if unset) */
383 if ((uc_pdata->min_uV != -ENODATA) &&
384 (uc_pdata->max_uV != -ENODATA) &&
385 (uc_pdata->min_uV == uc_pdata->max_uV))
386 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV;
388 /* Those values are optional (-ENODATA if unset) */
389 if ((uc_pdata->min_uA != -ENODATA) &&
390 (uc_pdata->max_uA != -ENODATA) &&
391 (uc_pdata->min_uA == uc_pdata->max_uA))
392 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA;
397 int regulators_enable_boot_on(bool verbose)
403 ret = uclass_get(UCLASS_REGULATOR, &uc);
406 for (uclass_first_device(UCLASS_REGULATOR, &dev);
408 uclass_next_device(&dev)) {
409 ret = regulator_autoset(dev);
410 if (ret == -EMEDIUMTYPE) {
415 regulator_show(dev, ret);
423 UCLASS_DRIVER(regulator) = {
424 .id = UCLASS_REGULATOR,
426 .post_bind = regulator_post_bind,
427 .pre_probe = regulator_pre_probe,
428 .per_device_platdata_auto_alloc_size =
429 sizeof(struct dm_regulator_uclass_platdata),