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