tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/*
2 * Regulator Driver for Freescale MC13783 PMIC
3 *
4 * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/mfd/mc13783-private.h>
12#include <linux/regulator/machine.h>
13#include <linux/regulator/driver.h>
14#include <linux/platform_device.h>
15#include <linux/mfd/mc13783.h>
16#include <linux/kernel.h>
17#include <linux/init.h>
18#include <linux/err.h>
19
20struct mc13783_regulator {
21 struct regulator_desc desc;
22 int reg;
23 int enable_bit;
24};
25
26static struct regulator_ops mc13783_regulator_ops;
27
28static struct mc13783_regulator mc13783_regulators[] = {
29 [MC13783_SW_SW3] = {
30 .desc = {
31 .name = "SW_SW3",
32 .ops = &mc13783_regulator_ops,
33 .type = REGULATOR_VOLTAGE,
34 .id = MC13783_SW_SW3,
35 .owner = THIS_MODULE,
36 },
37 .reg = MC13783_REG_SWITCHERS_5,
38 .enable_bit = MC13783_SWCTRL_SW3_EN,
39 },
40 [MC13783_SW_PLL] = {
41 .desc = {
42 .name = "SW_PLL",
43 .ops = &mc13783_regulator_ops,
44 .type = REGULATOR_VOLTAGE,
45 .id = MC13783_SW_PLL,
46 .owner = THIS_MODULE,
47 },
48 .reg = MC13783_REG_SWITCHERS_4,
49 .enable_bit = MC13783_SWCTRL_PLL_EN,
50 },
51 [MC13783_REGU_VAUDIO] = {
52 .desc = {
53 .name = "REGU_VAUDIO",
54 .ops = &mc13783_regulator_ops,
55 .type = REGULATOR_VOLTAGE,
56 .id = MC13783_REGU_VAUDIO,
57 .owner = THIS_MODULE,
58 },
59 .reg = MC13783_REG_REGULATOR_MODE_0,
60 .enable_bit = MC13783_REGCTRL_VAUDIO_EN,
61 },
62 [MC13783_REGU_VIOHI] = {
63 .desc = {
64 .name = "REGU_VIOHI",
65 .ops = &mc13783_regulator_ops,
66 .type = REGULATOR_VOLTAGE,
67 .id = MC13783_REGU_VIOHI,
68 .owner = THIS_MODULE,
69 },
70 .reg = MC13783_REG_REGULATOR_MODE_0,
71 .enable_bit = MC13783_REGCTRL_VIOHI_EN,
72 },
73 [MC13783_REGU_VIOLO] = {
74 .desc = {
75 .name = "REGU_VIOLO",
76 .ops = &mc13783_regulator_ops,
77 .type = REGULATOR_VOLTAGE,
78 .id = MC13783_REGU_VIOLO,
79 .owner = THIS_MODULE,
80 },
81 .reg = MC13783_REG_REGULATOR_MODE_0,
82 .enable_bit = MC13783_REGCTRL_VIOLO_EN,
83 },
84 [MC13783_REGU_VDIG] = {
85 .desc = {
86 .name = "REGU_VDIG",
87 .ops = &mc13783_regulator_ops,
88 .type = REGULATOR_VOLTAGE,
89 .id = MC13783_REGU_VDIG,
90 .owner = THIS_MODULE,
91 },
92 .reg = MC13783_REG_REGULATOR_MODE_0,
93 .enable_bit = MC13783_REGCTRL_VDIG_EN,
94 },
95 [MC13783_REGU_VGEN] = {
96 .desc = {
97 .name = "REGU_VGEN",
98 .ops = &mc13783_regulator_ops,
99 .type = REGULATOR_VOLTAGE,
100 .id = MC13783_REGU_VGEN,
101 .owner = THIS_MODULE,
102 },
103 .reg = MC13783_REG_REGULATOR_MODE_0,
104 .enable_bit = MC13783_REGCTRL_VGEN_EN,
105 },
106 [MC13783_REGU_VRFDIG] = {
107 .desc = {
108 .name = "REGU_VRFDIG",
109 .ops = &mc13783_regulator_ops,
110 .type = REGULATOR_VOLTAGE,
111 .id = MC13783_REGU_VRFDIG,
112 .owner = THIS_MODULE,
113 },
114 .reg = MC13783_REG_REGULATOR_MODE_0,
115 .enable_bit = MC13783_REGCTRL_VRFDIG_EN,
116 },
117 [MC13783_REGU_VRFREF] = {
118 .desc = {
119 .name = "REGU_VRFREF",
120 .ops = &mc13783_regulator_ops,
121 .type = REGULATOR_VOLTAGE,
122 .id = MC13783_REGU_VRFREF,
123 .owner = THIS_MODULE,
124 },
125 .reg = MC13783_REG_REGULATOR_MODE_0,
126 .enable_bit = MC13783_REGCTRL_VRFREF_EN,
127 },
128 [MC13783_REGU_VRFCP] = {
129 .desc = {
130 .name = "REGU_VRFCP",
131 .ops = &mc13783_regulator_ops,
132 .type = REGULATOR_VOLTAGE,
133 .id = MC13783_REGU_VRFCP,
134 .owner = THIS_MODULE,
135 },
136 .reg = MC13783_REG_REGULATOR_MODE_0,
137 .enable_bit = MC13783_REGCTRL_VRFCP_EN,
138 },
139 [MC13783_REGU_VSIM] = {
140 .desc = {
141 .name = "REGU_VSIM",
142 .ops = &mc13783_regulator_ops,
143 .type = REGULATOR_VOLTAGE,
144 .id = MC13783_REGU_VSIM,
145 .owner = THIS_MODULE,
146 },
147 .reg = MC13783_REG_REGULATOR_MODE_1,
148 .enable_bit = MC13783_REGCTRL_VSIM_EN,
149 },
150 [MC13783_REGU_VESIM] = {
151 .desc = {
152 .name = "REGU_VESIM",
153 .ops = &mc13783_regulator_ops,
154 .type = REGULATOR_VOLTAGE,
155 .id = MC13783_REGU_VESIM,
156 .owner = THIS_MODULE,
157 },
158 .reg = MC13783_REG_REGULATOR_MODE_1,
159 .enable_bit = MC13783_REGCTRL_VESIM_EN,
160 },
161 [MC13783_REGU_VCAM] = {
162 .desc = {
163 .name = "REGU_VCAM",
164 .ops = &mc13783_regulator_ops,
165 .type = REGULATOR_VOLTAGE,
166 .id = MC13783_REGU_VCAM,
167 .owner = THIS_MODULE,
168 },
169 .reg = MC13783_REG_REGULATOR_MODE_1,
170 .enable_bit = MC13783_REGCTRL_VCAM_EN,
171 },
172 [MC13783_REGU_VRFBG] = {
173 .desc = {
174 .name = "REGU_VRFBG",
175 .ops = &mc13783_regulator_ops,
176 .type = REGULATOR_VOLTAGE,
177 .id = MC13783_REGU_VRFBG,
178 .owner = THIS_MODULE,
179 },
180 .reg = MC13783_REG_REGULATOR_MODE_1,
181 .enable_bit = MC13783_REGCTRL_VRFBG_EN,
182 },
183 [MC13783_REGU_VVIB] = {
184 .desc = {
185 .name = "REGU_VVIB",
186 .ops = &mc13783_regulator_ops,
187 .type = REGULATOR_VOLTAGE,
188 .id = MC13783_REGU_VVIB,
189 .owner = THIS_MODULE,
190 },
191 .reg = MC13783_REG_REGULATOR_MODE_1,
192 .enable_bit = MC13783_REGCTRL_VVIB_EN,
193 },
194 [MC13783_REGU_VRF1] = {
195 .desc = {
196 .name = "REGU_VRF1",
197 .ops = &mc13783_regulator_ops,
198 .type = REGULATOR_VOLTAGE,
199 .id = MC13783_REGU_VRF1,
200 .owner = THIS_MODULE,
201 },
202 .reg = MC13783_REG_REGULATOR_MODE_1,
203 .enable_bit = MC13783_REGCTRL_VRF1_EN,
204 },
205 [MC13783_REGU_VRF2] = {
206 .desc = {
207 .name = "REGU_VRF2",
208 .ops = &mc13783_regulator_ops,
209 .type = REGULATOR_VOLTAGE,
210 .id = MC13783_REGU_VRF2,
211 .owner = THIS_MODULE,
212 },
213 .reg = MC13783_REG_REGULATOR_MODE_1,
214 .enable_bit = MC13783_REGCTRL_VRF2_EN,
215 },
216 [MC13783_REGU_VMMC1] = {
217 .desc = {
218 .name = "REGU_VMMC1",
219 .ops = &mc13783_regulator_ops,
220 .type = REGULATOR_VOLTAGE,
221 .id = MC13783_REGU_VMMC1,
222 .owner = THIS_MODULE,
223 },
224 .reg = MC13783_REG_REGULATOR_MODE_1,
225 .enable_bit = MC13783_REGCTRL_VMMC1_EN,
226 },
227 [MC13783_REGU_VMMC2] = {
228 .desc = {
229 .name = "REGU_VMMC2",
230 .ops = &mc13783_regulator_ops,
231 .type = REGULATOR_VOLTAGE,
232 .id = MC13783_REGU_VMMC2,
233 .owner = THIS_MODULE,
234 },
235 .reg = MC13783_REG_REGULATOR_MODE_1,
236 .enable_bit = MC13783_REGCTRL_VMMC2_EN,
237 },
238 [MC13783_REGU_GPO1] = {
239 .desc = {
240 .name = "REGU_GPO1",
241 .ops = &mc13783_regulator_ops,
242 .type = REGULATOR_VOLTAGE,
243 .id = MC13783_REGU_GPO1,
244 .owner = THIS_MODULE,
245 },
246 .reg = MC13783_REG_POWER_MISCELLANEOUS,
247 .enable_bit = MC13783_REGCTRL_GPO1_EN,
248 },
249 [MC13783_REGU_GPO2] = {
250 .desc = {
251 .name = "REGU_GPO2",
252 .ops = &mc13783_regulator_ops,
253 .type = REGULATOR_VOLTAGE,
254 .id = MC13783_REGU_GPO2,
255 .owner = THIS_MODULE,
256 },
257 .reg = MC13783_REG_POWER_MISCELLANEOUS,
258 .enable_bit = MC13783_REGCTRL_GPO2_EN,
259 },
260 [MC13783_REGU_GPO3] = {
261 .desc = {
262 .name = "REGU_GPO3",
263 .ops = &mc13783_regulator_ops,
264 .type = REGULATOR_VOLTAGE,
265 .id = MC13783_REGU_GPO3,
266 .owner = THIS_MODULE,
267 },
268 .reg = MC13783_REG_POWER_MISCELLANEOUS,
269 .enable_bit = MC13783_REGCTRL_GPO3_EN,
270 },
271 [MC13783_REGU_GPO4] = {
272 .desc = {
273 .name = "REGU_GPO4",
274 .ops = &mc13783_regulator_ops,
275 .type = REGULATOR_VOLTAGE,
276 .id = MC13783_REGU_GPO4,
277 .owner = THIS_MODULE,
278 },
279 .reg = MC13783_REG_POWER_MISCELLANEOUS,
280 .enable_bit = MC13783_REGCTRL_GPO4_EN,
281 },
282};
283
284struct mc13783_priv {
285 struct regulator_desc desc[ARRAY_SIZE(mc13783_regulators)];
286 struct mc13783 *mc13783;
287 struct regulator_dev *regulators[0];
288};
289
290static int mc13783_enable(struct regulator_dev *rdev)
291{
292 struct mc13783_priv *priv = rdev_get_drvdata(rdev);
293 int id = rdev_get_id(rdev);
294
295 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
296
297 return mc13783_set_bits(priv->mc13783, mc13783_regulators[id].reg,
298 mc13783_regulators[id].enable_bit,
299 mc13783_regulators[id].enable_bit);
300}
301
302static int mc13783_disable(struct regulator_dev *rdev)
303{
304 struct mc13783_priv *priv = rdev_get_drvdata(rdev);
305 int id = rdev_get_id(rdev);
306
307 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
308
309 return mc13783_set_bits(priv->mc13783, mc13783_regulators[id].reg,
310 mc13783_regulators[id].enable_bit, 0);
311}
312
313static int mc13783_is_enabled(struct regulator_dev *rdev)
314{
315 struct mc13783_priv *priv = rdev_get_drvdata(rdev);
316 int ret, id = rdev_get_id(rdev);
317 unsigned int val;
318
319 ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val);
320 if (ret)
321 return ret;
322
323 return (val & mc13783_regulators[id].enable_bit) != 0;
324}
325
326static struct regulator_ops mc13783_regulator_ops = {
327 .enable = mc13783_enable,
328 .disable = mc13783_disable,
329 .is_enabled = mc13783_is_enabled,
330};
331
332static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
333{
334 struct mc13783_priv *priv;
335 struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent);
336 struct mc13783_regulator_init_data *init_data;
337 int i, ret;
338
339 dev_dbg(&pdev->dev, "mc13783_regulator_probe id %d\n", pdev->id);
340
341 priv = kzalloc(sizeof(*priv) + mc13783->num_regulators * sizeof(void *),
342 GFP_KERNEL);
343 if (!priv)
344 return -ENOMEM;
345
346 priv->mc13783 = mc13783;
347
348 for (i = 0; i < mc13783->num_regulators; i++) {
349 init_data = &mc13783->regulators[i];
350 priv->regulators[i] = regulator_register(
351 &mc13783_regulators[init_data->id].desc,
352 &pdev->dev, init_data->init_data, priv);
353
354 if (IS_ERR(priv->regulators[i])) {
355 dev_err(&pdev->dev, "failed to register regulator %s\n",
356 mc13783_regulators[i].desc.name);
357 ret = PTR_ERR(priv->regulators[i]);
358 goto err;
359 }
360 }
361
362 platform_set_drvdata(pdev, priv);
363
364 return 0;
365err:
366 while (--i >= 0)
367 regulator_unregister(priv->regulators[i]);
368
369 kfree(priv);
370
371 return ret;
372}
373
374static int __devexit mc13783_regulator_remove(struct platform_device *pdev)
375{
376 struct mc13783_priv *priv = platform_get_drvdata(pdev);
377 struct mc13783 *mc13783 = priv->mc13783;
378 int i;
379
380 for (i = 0; i < mc13783->num_regulators; i++)
381 regulator_unregister(priv->regulators[i]);
382
383 return 0;
384}
385
386static struct platform_driver mc13783_regulator_driver = {
387 .driver = {
388 .name = "mc13783-regulator",
389 .owner = THIS_MODULE,
390 },
391 .remove = __devexit_p(mc13783_regulator_remove),
392};
393
394static int __init mc13783_regulator_init(void)
395{
396 return platform_driver_probe(&mc13783_regulator_driver,
397 mc13783_regulator_probe);
398}
399subsys_initcall(mc13783_regulator_init);
400
401static void __exit mc13783_regulator_exit(void)
402{
403 platform_driver_unregister(&mc13783_regulator_driver);
404}
405module_exit(mc13783_regulator_exit);
406
407MODULE_LICENSE("GPL");
408MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
409MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
410MODULE_ALIAS("platform:mc13783-regulator");