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);
51 int regulator_get_current(struct udevice *dev)
53 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
55 if (!ops || !ops->get_current)
58 return ops->get_current(dev);
61 int regulator_set_current(struct udevice *dev, int uA)
63 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
65 if (!ops || !ops->set_current)
68 return ops->set_current(dev, uA);
71 bool regulator_get_enable(struct udevice *dev)
73 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
75 if (!ops || !ops->get_enable)
78 return ops->get_enable(dev);
81 int regulator_set_enable(struct udevice *dev, bool enable)
83 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
85 if (!ops || !ops->set_enable)
88 return ops->set_enable(dev, enable);
91 int regulator_get_mode(struct udevice *dev)
93 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
95 if (!ops || !ops->get_mode)
98 return ops->get_mode(dev);
101 int regulator_set_mode(struct udevice *dev, int mode)
103 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
105 if (!ops || !ops->set_mode)
108 return ops->set_mode(dev, mode);
111 int regulator_get_by_platname(const char *plat_name, struct udevice **devp)
113 struct dm_regulator_uclass_platdata *uc_pdata;
119 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
120 ret = uclass_find_next_device(&dev)) {
124 uc_pdata = dev_get_uclass_platdata(dev);
125 if (!uc_pdata || strcmp(plat_name, uc_pdata->name))
128 return uclass_get_device_tail(dev, 0, devp);
131 debug("%s: can't find: %s\n", __func__, plat_name);
136 int regulator_get_by_devname(const char *devname, struct udevice **devp)
138 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp);
141 int regulator_autoset(struct udevice *dev)
143 struct dm_regulator_uclass_platdata *uc_pdata;
146 uc_pdata = dev_get_uclass_platdata(dev);
147 if (!uc_pdata->always_on && !uc_pdata->boot_on)
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);
156 ret = regulator_set_enable(dev, true);
161 static void regulator_show(struct udevice *dev, int ret)
163 struct dm_regulator_uclass_platdata *uc_pdata;
165 uc_pdata = dev_get_uclass_platdata(dev);
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");
174 printf(" (ret: %d)\n", ret);
178 int regulator_autoset_by_name(const char *platname, struct udevice **devp)
183 ret = regulator_get_by_platname(platname, &dev);
187 debug("Can get the regulator: %s!", platname);
191 return regulator_autoset(dev);
194 int regulator_list_autoset(const char *list_platname[],
195 struct udevice *list_devp[],
199 int error = 0, i = 0, ret;
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);
217 static bool regulator_name_is_unique(struct udevice *check_dev,
218 const char *check_name)
220 struct dm_regulator_uclass_platdata *uc_pdata;
222 int check_len = strlen(check_name);
226 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
227 ret = uclass_find_next_device(&dev)) {
228 if (ret || dev == check_dev)
231 uc_pdata = dev_get_uclass_platdata(dev);
232 len = strlen(uc_pdata->name);
233 if (len != check_len)
236 if (!strcmp(uc_pdata->name, check_name))
243 static int regulator_post_bind(struct udevice *dev)
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";
250 uc_pdata = dev_get_uclass_platdata(dev);
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);
262 if (regulator_name_is_unique(dev, uc_pdata->name))
265 error("\"%s\" of dev: \"%s\", has nonunique value: \"%s\"",
266 property, dev->name, uc_pdata->name);
271 static int regulator_pre_probe(struct udevice *dev)
273 struct dm_regulator_uclass_platdata *uc_pdata;
274 int offset = dev->of_offset;
276 uc_pdata = dev_get_uclass_platdata(dev);
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");
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;
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;
309 int regulators_enable_boot_on(bool verbose)
315 ret = uclass_get(UCLASS_REGULATOR, &uc);
318 for (uclass_first_device(UCLASS_REGULATOR, &dev);
320 uclass_next_device(&dev)) {
321 ret = regulator_autoset(dev);
322 if (ret == -EMEDIUMTYPE)
325 regulator_show(dev, ret);
331 UCLASS_DRIVER(regulator) = {
332 .id = UCLASS_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),