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8#include <common.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
15DECLARE_GLOBAL_DATA_PTR;
16
17int 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
31int 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
41int regulator_set_value(struct udevice *dev, int uV)
42{
43 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
44 struct dm_regulator_uclass_platdata *uc_pdata;
45
46 uc_pdata = dev_get_uclass_platdata(dev);
47 if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV)
48 return -EINVAL;
49 if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV)
50 return -EINVAL;
51
52 if (!ops || !ops->set_value)
53 return -ENOSYS;
54
55 return ops->set_value(dev, uV);
56}
57
58
59
60
61
62int regulator_set_value_force(struct udevice *dev, int uV)
63{
64 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
65
66 if (!ops || !ops->set_value)
67 return -ENOSYS;
68
69 return ops->set_value(dev, uV);
70}
71
72int regulator_get_current(struct udevice *dev)
73{
74 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
75
76 if (!ops || !ops->get_current)
77 return -ENOSYS;
78
79 return ops->get_current(dev);
80}
81
82int regulator_set_current(struct udevice *dev, int uA)
83{
84 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
85 struct dm_regulator_uclass_platdata *uc_pdata;
86
87 uc_pdata = dev_get_uclass_platdata(dev);
88 if (uc_pdata->min_uA != -ENODATA && uA < uc_pdata->min_uA)
89 return -EINVAL;
90 if (uc_pdata->max_uA != -ENODATA && uA > uc_pdata->max_uA)
91 return -EINVAL;
92
93 if (!ops || !ops->set_current)
94 return -ENOSYS;
95
96 return ops->set_current(dev, uA);
97}
98
99int regulator_get_enable(struct udevice *dev)
100{
101 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
102
103 if (!ops || !ops->get_enable)
104 return -ENOSYS;
105
106 return ops->get_enable(dev);
107}
108
109int regulator_set_enable(struct udevice *dev, bool enable)
110{
111 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
112
113 if (!ops || !ops->set_enable)
114 return -ENOSYS;
115
116 return ops->set_enable(dev, enable);
117}
118
119int regulator_get_mode(struct udevice *dev)
120{
121 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
122
123 if (!ops || !ops->get_mode)
124 return -ENOSYS;
125
126 return ops->get_mode(dev);
127}
128
129int regulator_set_mode(struct udevice *dev, int mode)
130{
131 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
132
133 if (!ops || !ops->set_mode)
134 return -ENOSYS;
135
136 return ops->set_mode(dev, mode);
137}
138
139int regulator_get_by_platname(const char *plat_name, struct udevice **devp)
140{
141 struct dm_regulator_uclass_platdata *uc_pdata;
142 struct udevice *dev;
143 int ret;
144
145 *devp = NULL;
146
147 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
148 ret = uclass_find_next_device(&dev)) {
149 if (ret) {
150 debug("regulator %s, ret=%d\n", dev->name, ret);
151 continue;
152 }
153
154 uc_pdata = dev_get_uclass_platdata(dev);
155 if (!uc_pdata || strcmp(plat_name, uc_pdata->name))
156 continue;
157
158 return uclass_get_device_tail(dev, 0, devp);
159 }
160
161 debug("%s: can't find: %s, ret=%d\n", __func__, plat_name, ret);
162
163 return -ENODEV;
164}
165
166int regulator_get_by_devname(const char *devname, struct udevice **devp)
167{
168 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp);
169}
170
171int device_get_supply_regulator(struct udevice *dev, const char *supply_name,
172 struct udevice **devp)
173{
174 return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
175 supply_name, devp);
176}
177
178int regulator_autoset(struct udevice *dev)
179{
180 struct dm_regulator_uclass_platdata *uc_pdata;
181 int ret = 0;
182
183 uc_pdata = dev_get_uclass_platdata(dev);
184 if (!uc_pdata->always_on && !uc_pdata->boot_on)
185 return -EMEDIUMTYPE;
186
187 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
188 ret = regulator_set_value(dev, uc_pdata->min_uV);
189 if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA))
190 ret = regulator_set_current(dev, uc_pdata->min_uA);
191
192 if (!ret)
193 ret = regulator_set_enable(dev, true);
194
195 return ret;
196}
197
198static void regulator_show(struct udevice *dev, int ret)
199{
200 struct dm_regulator_uclass_platdata *uc_pdata;
201
202 uc_pdata = dev_get_uclass_platdata(dev);
203
204 printf("%s@%s: ", dev->name, uc_pdata->name);
205 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
206 printf("set %d uV", uc_pdata->min_uV);
207 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)
208 printf("; set %d uA", uc_pdata->min_uA);
209 printf("; enabling");
210 if (ret)
211 printf(" (ret: %d)", ret);
212 printf("\n");
213}
214
215int regulator_autoset_by_name(const char *platname, struct udevice **devp)
216{
217 struct udevice *dev;
218 int ret;
219
220 ret = regulator_get_by_platname(platname, &dev);
221 if (devp)
222 *devp = dev;
223 if (ret) {
224 debug("Can get the regulator: %s (err=%d)\n", platname, ret);
225 return ret;
226 }
227
228 return regulator_autoset(dev);
229}
230
231int regulator_list_autoset(const char *list_platname[],
232 struct udevice *list_devp[],
233 bool verbose)
234{
235 struct udevice *dev;
236 int error = 0, i = 0, ret;
237
238 while (list_platname[i]) {
239 ret = regulator_autoset_by_name(list_platname[i], &dev);
240 if (ret != -EMEDIUMTYPE && verbose)
241 regulator_show(dev, ret);
242 if (ret & !error)
243 error = ret;
244
245 if (list_devp)
246 list_devp[i] = dev;
247
248 i++;
249 }
250
251 return error;
252}
253
254static bool regulator_name_is_unique(struct udevice *check_dev,
255 const char *check_name)
256{
257 struct dm_regulator_uclass_platdata *uc_pdata;
258 struct udevice *dev;
259 int check_len = strlen(check_name);
260 int ret;
261 int len;
262
263 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
264 ret = uclass_find_next_device(&dev)) {
265 if (ret || dev == check_dev)
266 continue;
267
268 uc_pdata = dev_get_uclass_platdata(dev);
269 len = strlen(uc_pdata->name);
270 if (len != check_len)
271 continue;
272
273 if (!strcmp(uc_pdata->name, check_name))
274 return false;
275 }
276
277 return true;
278}
279
280static int regulator_post_bind(struct udevice *dev)
281{
282 struct dm_regulator_uclass_platdata *uc_pdata;
283 const char *property = "regulator-name";
284
285 uc_pdata = dev_get_uclass_platdata(dev);
286
287
288 uc_pdata->name = dev_read_string(dev, property);
289 if (!uc_pdata->name) {
290 debug("%s: dev '%s' has no property '%s'\n",
291 __func__, dev->name, property);
292 uc_pdata->name = dev_read_name(dev);
293 if (!uc_pdata->name)
294 return -EINVAL;
295 }
296
297 if (regulator_name_is_unique(dev, uc_pdata->name))
298 return 0;
299
300 debug("'%s' of dev: '%s', has nonunique value: '%s\n",
301 property, dev->name, uc_pdata->name);
302
303 return -EINVAL;
304}
305
306static int regulator_pre_probe(struct udevice *dev)
307{
308 struct dm_regulator_uclass_platdata *uc_pdata;
309
310 uc_pdata = dev_get_uclass_platdata(dev);
311 if (!uc_pdata)
312 return -ENXIO;
313
314
315 uc_pdata->min_uV = dev_read_u32_default(dev, "regulator-min-microvolt",
316 -ENODATA);
317 uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt",
318 -ENODATA);
319 uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp",
320 -ENODATA);
321 uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp",
322 -ENODATA);
323 uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on");
324 uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on");
325
326
327 if ((uc_pdata->min_uV != -ENODATA) &&
328 (uc_pdata->max_uV != -ENODATA) &&
329 (uc_pdata->min_uV == uc_pdata->max_uV))
330 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV;
331
332
333 if ((uc_pdata->min_uA != -ENODATA) &&
334 (uc_pdata->max_uA != -ENODATA) &&
335 (uc_pdata->min_uA == uc_pdata->max_uA))
336 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA;
337
338 return 0;
339}
340
341int regulators_enable_boot_on(bool verbose)
342{
343 struct udevice *dev;
344 struct uclass *uc;
345 int ret;
346
347 ret = uclass_get(UCLASS_REGULATOR, &uc);
348 if (ret)
349 return ret;
350 for (uclass_first_device(UCLASS_REGULATOR, &dev);
351 dev;
352 uclass_next_device(&dev)) {
353 ret = regulator_autoset(dev);
354 if (ret == -EMEDIUMTYPE) {
355 ret = 0;
356 continue;
357 }
358 if (verbose)
359 regulator_show(dev, ret);
360 if (ret == -ENOSYS)
361 ret = 0;
362 }
363
364 return ret;
365}
366
367UCLASS_DRIVER(regulator) = {
368 .id = UCLASS_REGULATOR,
369 .name = "regulator",
370 .post_bind = regulator_post_bind,
371 .pre_probe = regulator_pre_probe,
372 .per_device_platdata_auto_alloc_size =
373 sizeof(struct dm_regulator_uclass_platdata),
374};
375
