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7#include <common.h>
8#include <fdtdec.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
99bool 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 continue;
151
152 uc_pdata = dev_get_uclass_platdata(dev);
153 if (!uc_pdata || strcmp(plat_name, uc_pdata->name))
154 continue;
155
156 return uclass_get_device_tail(dev, 0, devp);
157 }
158
159 debug("%s: can't find: %s\n", __func__, plat_name);
160
161 return -ENODEV;
162}
163
164int regulator_get_by_devname(const char *devname, struct udevice **devp)
165{
166 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp);
167}
168
169int device_get_supply_regulator(struct udevice *dev, const char *supply_name,
170 struct udevice **devp)
171{
172 return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
173 supply_name, devp);
174}
175
176int regulator_autoset(struct udevice *dev)
177{
178 struct dm_regulator_uclass_platdata *uc_pdata;
179 int ret = 0;
180
181 uc_pdata = dev_get_uclass_platdata(dev);
182 if (!uc_pdata->always_on && !uc_pdata->boot_on)
183 return -EMEDIUMTYPE;
184
185 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
186 ret = regulator_set_value(dev, uc_pdata->min_uV);
187 if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA))
188 ret = regulator_set_current(dev, uc_pdata->min_uA);
189
190 if (!ret)
191 ret = regulator_set_enable(dev, true);
192
193 return ret;
194}
195
196static void regulator_show(struct udevice *dev, int ret)
197{
198 struct dm_regulator_uclass_platdata *uc_pdata;
199
200 uc_pdata = dev_get_uclass_platdata(dev);
201
202 printf("%s@%s: ", dev->name, uc_pdata->name);
203 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
204 printf("set %d uV", uc_pdata->min_uV);
205 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)
206 printf("; set %d uA", uc_pdata->min_uA);
207 printf("; enabling");
208 if (ret)
209 printf(" (ret: %d)", ret);
210 printf("\n");
211}
212
213int regulator_autoset_by_name(const char *platname, struct udevice **devp)
214{
215 struct udevice *dev;
216 int ret;
217
218 ret = regulator_get_by_platname(platname, &dev);
219 if (devp)
220 *devp = dev;
221 if (ret) {
222 debug("Can get the regulator: %s!", platname);
223 return ret;
224 }
225
226 return regulator_autoset(dev);
227}
228
229int regulator_list_autoset(const char *list_platname[],
230 struct udevice *list_devp[],
231 bool verbose)
232{
233 struct udevice *dev;
234 int error = 0, i = 0, ret;
235
236 while (list_platname[i]) {
237 ret = regulator_autoset_by_name(list_platname[i], &dev);
238 if (ret != -EMEDIUMTYPE && verbose)
239 regulator_show(dev, ret);
240 if (ret & !error)
241 error = ret;
242
243 if (list_devp)
244 list_devp[i] = dev;
245
246 i++;
247 }
248
249 return error;
250}
251
252static bool regulator_name_is_unique(struct udevice *check_dev,
253 const char *check_name)
254{
255 struct dm_regulator_uclass_platdata *uc_pdata;
256 struct udevice *dev;
257 int check_len = strlen(check_name);
258 int ret;
259 int len;
260
261 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
262 ret = uclass_find_next_device(&dev)) {
263 if (ret || dev == check_dev)
264 continue;
265
266 uc_pdata = dev_get_uclass_platdata(dev);
267 len = strlen(uc_pdata->name);
268 if (len != check_len)
269 continue;
270
271 if (!strcmp(uc_pdata->name, check_name))
272 return false;
273 }
274
275 return true;
276}
277
278static int regulator_post_bind(struct udevice *dev)
279{
280 struct dm_regulator_uclass_platdata *uc_pdata;
281 int offset = dev->of_offset;
282 const void *blob = gd->fdt_blob;
283 const char *property = "regulator-name";
284
285 uc_pdata = dev_get_uclass_platdata(dev);
286 if (!uc_pdata)
287 return -ENXIO;
288
289
290 uc_pdata->name = fdt_getprop(blob, offset, property, NULL);
291 if (!uc_pdata->name) {
292 debug("%s: dev: %s has no property 'regulator-name'\n",
293 __func__, dev->name);
294 uc_pdata->name = fdt_get_name(blob, offset, NULL);
295 if (!uc_pdata->name)
296 return -EINVAL;
297 }
298
299 if (regulator_name_is_unique(dev, uc_pdata->name))
300 return 0;
301
302 debug("\"%s\" of dev: \"%s\", has nonunique value: \"%s\"",
303 property, dev->name, uc_pdata->name);
304
305 return -EINVAL;
306}
307
308static int regulator_pre_probe(struct udevice *dev)
309{
310 struct dm_regulator_uclass_platdata *uc_pdata;
311 int offset = dev->of_offset;
312
313 uc_pdata = dev_get_uclass_platdata(dev);
314 if (!uc_pdata)
315 return -ENXIO;
316
317
318 uc_pdata->min_uV = fdtdec_get_int(gd->fdt_blob, offset,
319 "regulator-min-microvolt", -ENODATA);
320 uc_pdata->max_uV = fdtdec_get_int(gd->fdt_blob, offset,
321 "regulator-max-microvolt", -ENODATA);
322 uc_pdata->min_uA = fdtdec_get_int(gd->fdt_blob, offset,
323 "regulator-min-microamp", -ENODATA);
324 uc_pdata->max_uA = fdtdec_get_int(gd->fdt_blob, offset,
325 "regulator-max-microamp", -ENODATA);
326 uc_pdata->always_on = fdtdec_get_bool(gd->fdt_blob, offset,
327 "regulator-always-on");
328 uc_pdata->boot_on = fdtdec_get_bool(gd->fdt_blob, offset,
329 "regulator-boot-on");
330
331
332 if ((uc_pdata->min_uV != -ENODATA) &&
333 (uc_pdata->max_uV != -ENODATA) &&
334 (uc_pdata->min_uV == uc_pdata->max_uV))
335 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV;
336
337
338 if ((uc_pdata->min_uA != -ENODATA) &&
339 (uc_pdata->max_uA != -ENODATA) &&
340 (uc_pdata->min_uA == uc_pdata->max_uA))
341 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA;
342
343 return 0;
344}
345
346int regulators_enable_boot_on(bool verbose)
347{
348 struct udevice *dev;
349 struct uclass *uc;
350 int ret;
351
352 ret = uclass_get(UCLASS_REGULATOR, &uc);
353 if (ret)
354 return ret;
355 for (uclass_first_device(UCLASS_REGULATOR, &dev);
356 dev;
357 uclass_next_device(&dev)) {
358 ret = regulator_autoset(dev);
359 if (ret == -EMEDIUMTYPE) {
360 ret = 0;
361 continue;
362 }
363 if (verbose)
364 regulator_show(dev, ret);
365 if (ret == -ENOSYS)
366 ret = 0;
367 }
368
369 return ret;
370}
371
372UCLASS_DRIVER(regulator) = {
373 .id = UCLASS_REGULATOR,
374 .name = "regulator",
375 .post_bind = regulator_post_bind,
376 .pre_probe = regulator_pre_probe,
377 .per_device_platdata_auto_alloc_size =
378 sizeof(struct dm_regulator_uclass_platdata),
379};
380
