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d1c6b4fe MB |
1 | /* |
2 | * wm831x-ldo.c -- LDO driver for the WM831x series | |
3 | * | |
4 | * Copyright 2009 Wolfson Microelectronics PLC. | |
5 | * | |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/moduleparam.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/bitops.h> | |
18 | #include <linux/err.h> | |
19 | #include <linux/i2c.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/regulator/driver.h> | |
22 | ||
23 | #include <linux/mfd/wm831x/core.h> | |
24 | #include <linux/mfd/wm831x/regulator.h> | |
25 | #include <linux/mfd/wm831x/pdata.h> | |
26 | ||
27 | #define WM831X_LDO_MAX_NAME 6 | |
28 | ||
29 | #define WM831X_LDO_CONTROL 0 | |
30 | #define WM831X_LDO_ON_CONTROL 1 | |
31 | #define WM831X_LDO_SLEEP_CONTROL 2 | |
32 | ||
33 | #define WM831X_ALIVE_LDO_ON_CONTROL 0 | |
34 | #define WM831X_ALIVE_LDO_SLEEP_CONTROL 1 | |
35 | ||
36 | struct wm831x_ldo { | |
37 | char name[WM831X_LDO_MAX_NAME]; | |
38 | struct regulator_desc desc; | |
39 | int base; | |
40 | struct wm831x *wm831x; | |
41 | struct regulator_dev *regulator; | |
42 | }; | |
43 | ||
44 | /* | |
45 | * Shared | |
46 | */ | |
47 | ||
48 | static int wm831x_ldo_is_enabled(struct regulator_dev *rdev) | |
49 | { | |
50 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
51 | struct wm831x *wm831x = ldo->wm831x; | |
52 | int mask = 1 << rdev_get_id(rdev); | |
53 | int reg; | |
54 | ||
55 | reg = wm831x_reg_read(wm831x, WM831X_LDO_ENABLE); | |
56 | if (reg < 0) | |
57 | return reg; | |
58 | ||
59 | if (reg & mask) | |
60 | return 1; | |
61 | else | |
62 | return 0; | |
63 | } | |
64 | ||
65 | static int wm831x_ldo_enable(struct regulator_dev *rdev) | |
66 | { | |
67 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
68 | struct wm831x *wm831x = ldo->wm831x; | |
69 | int mask = 1 << rdev_get_id(rdev); | |
70 | ||
71 | return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, mask); | |
72 | } | |
73 | ||
74 | static int wm831x_ldo_disable(struct regulator_dev *rdev) | |
75 | { | |
76 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
77 | struct wm831x *wm831x = ldo->wm831x; | |
78 | int mask = 1 << rdev_get_id(rdev); | |
79 | ||
80 | return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, 0); | |
81 | } | |
82 | ||
83 | static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data) | |
84 | { | |
85 | struct wm831x_ldo *ldo = data; | |
86 | ||
87 | regulator_notifier_call_chain(ldo->regulator, | |
88 | REGULATOR_EVENT_UNDER_VOLTAGE, | |
89 | NULL); | |
90 | ||
91 | return IRQ_HANDLED; | |
92 | } | |
93 | ||
94 | /* | |
95 | * General purpose LDOs | |
96 | */ | |
97 | ||
98 | #define WM831X_GP_LDO_SELECTOR_LOW 0xe | |
99 | #define WM831X_GP_LDO_MAX_SELECTOR 0x1f | |
100 | ||
101 | static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev, | |
102 | unsigned int selector) | |
103 | { | |
104 | /* 0.9-1.6V in 50mV steps */ | |
105 | if (selector <= WM831X_GP_LDO_SELECTOR_LOW) | |
106 | return 900000 + (selector * 50000); | |
107 | /* 1.7-3.3V in 50mV steps */ | |
108 | if (selector <= WM831X_GP_LDO_MAX_SELECTOR) | |
109 | return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW) | |
110 | * 100000); | |
111 | return -EINVAL; | |
112 | } | |
113 | ||
114 | static int wm831x_gp_ldo_set_voltage_int(struct regulator_dev *rdev, int reg, | |
115 | int min_uV, int max_uV) | |
116 | { | |
117 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
118 | struct wm831x *wm831x = ldo->wm831x; | |
119 | int vsel, ret; | |
120 | ||
121 | if (min_uV < 900000) | |
122 | vsel = 0; | |
123 | else if (min_uV < 1700000) | |
124 | vsel = ((min_uV - 900000) / 50000); | |
125 | else | |
126 | vsel = ((min_uV - 1700000) / 100000) | |
127 | + WM831X_GP_LDO_SELECTOR_LOW + 1; | |
128 | ||
129 | ret = wm831x_gp_ldo_list_voltage(rdev, vsel); | |
130 | if (ret < 0) | |
131 | return ret; | |
132 | if (ret < min_uV || ret > max_uV) | |
133 | return -EINVAL; | |
134 | ||
135 | return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, vsel); | |
136 | } | |
137 | ||
138 | static int wm831x_gp_ldo_set_voltage(struct regulator_dev *rdev, | |
139 | int min_uV, int max_uV) | |
140 | { | |
141 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
142 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
143 | ||
144 | return wm831x_gp_ldo_set_voltage_int(rdev, reg, min_uV, max_uV); | |
145 | } | |
146 | ||
147 | static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
148 | int uV) | |
149 | { | |
150 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
151 | int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
152 | ||
153 | return wm831x_gp_ldo_set_voltage_int(rdev, reg, uV, uV); | |
154 | } | |
155 | ||
156 | static int wm831x_gp_ldo_get_voltage(struct regulator_dev *rdev) | |
157 | { | |
158 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
159 | struct wm831x *wm831x = ldo->wm831x; | |
160 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
161 | int ret; | |
162 | ||
163 | ret = wm831x_reg_read(wm831x, reg); | |
164 | if (ret < 0) | |
165 | return ret; | |
166 | ||
167 | ret &= WM831X_LDO1_ON_VSEL_MASK; | |
168 | ||
169 | return wm831x_gp_ldo_list_voltage(rdev, ret); | |
170 | } | |
171 | ||
172 | static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev) | |
173 | { | |
174 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
175 | struct wm831x *wm831x = ldo->wm831x; | |
176 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
177 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
9a767d43 | 178 | int ret; |
d1c6b4fe MB |
179 | |
180 | ret = wm831x_reg_read(wm831x, on_reg); | |
181 | if (ret < 0) | |
9a767d43 | 182 | return ret; |
d1c6b4fe MB |
183 | |
184 | if (!(ret & WM831X_LDO1_ON_MODE)) | |
185 | return REGULATOR_MODE_NORMAL; | |
186 | ||
187 | ret = wm831x_reg_read(wm831x, ctrl_reg); | |
188 | if (ret < 0) | |
9a767d43 | 189 | return ret; |
d1c6b4fe MB |
190 | |
191 | if (ret & WM831X_LDO1_LP_MODE) | |
192 | return REGULATOR_MODE_STANDBY; | |
193 | else | |
194 | return REGULATOR_MODE_IDLE; | |
195 | } | |
196 | ||
197 | static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev, | |
198 | unsigned int mode) | |
199 | { | |
200 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
201 | struct wm831x *wm831x = ldo->wm831x; | |
202 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
203 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
204 | int ret; | |
205 | ||
206 | ||
207 | switch (mode) { | |
208 | case REGULATOR_MODE_NORMAL: | |
209 | ret = wm831x_set_bits(wm831x, on_reg, | |
210 | WM831X_LDO1_ON_MODE, 0); | |
211 | if (ret < 0) | |
212 | return ret; | |
213 | break; | |
214 | ||
215 | case REGULATOR_MODE_IDLE: | |
216 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
217 | WM831X_LDO1_LP_MODE, | |
218 | WM831X_LDO1_LP_MODE); | |
219 | if (ret < 0) | |
220 | return ret; | |
221 | ||
222 | ret = wm831x_set_bits(wm831x, on_reg, | |
223 | WM831X_LDO1_ON_MODE, | |
224 | WM831X_LDO1_ON_MODE); | |
225 | if (ret < 0) | |
226 | return ret; | |
227 | ||
228 | case REGULATOR_MODE_STANDBY: | |
229 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
230 | WM831X_LDO1_LP_MODE, 0); | |
231 | if (ret < 0) | |
232 | return ret; | |
233 | ||
234 | ret = wm831x_set_bits(wm831x, on_reg, | |
235 | WM831X_LDO1_ON_MODE, | |
236 | WM831X_LDO1_ON_MODE); | |
237 | if (ret < 0) | |
238 | return ret; | |
239 | break; | |
240 | ||
241 | default: | |
242 | return -EINVAL; | |
243 | } | |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
248 | static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev) | |
249 | { | |
250 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
251 | struct wm831x *wm831x = ldo->wm831x; | |
252 | int mask = 1 << rdev_get_id(rdev); | |
253 | int ret; | |
254 | ||
255 | /* Is the regulator on? */ | |
256 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
257 | if (ret < 0) | |
258 | return ret; | |
259 | if (!(ret & mask)) | |
260 | return REGULATOR_STATUS_OFF; | |
261 | ||
262 | /* Is it reporting under voltage? */ | |
263 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
264 | if (ret & mask) | |
265 | return REGULATOR_STATUS_ERROR; | |
266 | ||
267 | ret = wm831x_gp_ldo_get_mode(rdev); | |
268 | if (ret < 0) | |
269 | return ret; | |
270 | else | |
271 | return regulator_mode_to_status(ret); | |
272 | } | |
273 | ||
274 | static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev, | |
275 | int input_uV, | |
276 | int output_uV, int load_uA) | |
277 | { | |
278 | if (load_uA < 20000) | |
279 | return REGULATOR_MODE_STANDBY; | |
280 | if (load_uA < 50000) | |
281 | return REGULATOR_MODE_IDLE; | |
282 | return REGULATOR_MODE_NORMAL; | |
283 | } | |
284 | ||
285 | ||
286 | static struct regulator_ops wm831x_gp_ldo_ops = { | |
287 | .list_voltage = wm831x_gp_ldo_list_voltage, | |
288 | .get_voltage = wm831x_gp_ldo_get_voltage, | |
289 | .set_voltage = wm831x_gp_ldo_set_voltage, | |
290 | .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage, | |
291 | .get_mode = wm831x_gp_ldo_get_mode, | |
292 | .set_mode = wm831x_gp_ldo_set_mode, | |
293 | .get_status = wm831x_gp_ldo_get_status, | |
294 | .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode, | |
295 | ||
296 | .is_enabled = wm831x_ldo_is_enabled, | |
297 | .enable = wm831x_ldo_enable, | |
298 | .disable = wm831x_ldo_disable, | |
299 | }; | |
300 | ||
301 | static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev) | |
302 | { | |
303 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
304 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
305 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); | |
306 | struct wm831x_ldo *ldo; | |
307 | struct resource *res; | |
308 | int ret, irq; | |
309 | ||
310 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
311 | ||
312 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
313 | return -ENODEV; | |
314 | ||
315 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
316 | if (ldo == NULL) { | |
317 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
318 | return -ENOMEM; | |
319 | } | |
320 | ||
321 | ldo->wm831x = wm831x; | |
322 | ||
323 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
324 | if (res == NULL) { | |
325 | dev_err(&pdev->dev, "No I/O resource\n"); | |
326 | ret = -EINVAL; | |
327 | goto err; | |
328 | } | |
329 | ldo->base = res->start; | |
330 | ||
331 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
332 | ldo->desc.name = ldo->name; | |
333 | ldo->desc.id = id; | |
334 | ldo->desc.type = REGULATOR_VOLTAGE; | |
335 | ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1; | |
336 | ldo->desc.ops = &wm831x_gp_ldo_ops; | |
337 | ldo->desc.owner = THIS_MODULE; | |
338 | ||
339 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
340 | pdata->ldo[id], ldo); | |
341 | if (IS_ERR(ldo->regulator)) { | |
342 | ret = PTR_ERR(ldo->regulator); | |
343 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
344 | id + 1, ret); | |
345 | goto err; | |
346 | } | |
347 | ||
348 | irq = platform_get_irq_byname(pdev, "UV"); | |
349 | ret = wm831x_request_irq(wm831x, irq, wm831x_ldo_uv_irq, | |
350 | IRQF_TRIGGER_RISING, ldo->name, | |
351 | ldo); | |
352 | if (ret != 0) { | |
353 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
354 | irq, ret); | |
355 | goto err_regulator; | |
356 | } | |
357 | ||
358 | platform_set_drvdata(pdev, ldo); | |
359 | ||
360 | return 0; | |
361 | ||
362 | err_regulator: | |
363 | regulator_unregister(ldo->regulator); | |
364 | err: | |
365 | kfree(ldo); | |
366 | return ret; | |
367 | } | |
368 | ||
369 | static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev) | |
370 | { | |
371 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
372 | struct wm831x *wm831x = ldo->wm831x; | |
373 | ||
eb66d565 DT |
374 | platform_set_drvdata(pdev, NULL); |
375 | ||
d1c6b4fe MB |
376 | wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), ldo); |
377 | regulator_unregister(ldo->regulator); | |
378 | kfree(ldo); | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
383 | static struct platform_driver wm831x_gp_ldo_driver = { | |
384 | .probe = wm831x_gp_ldo_probe, | |
385 | .remove = __devexit_p(wm831x_gp_ldo_remove), | |
386 | .driver = { | |
387 | .name = "wm831x-ldo", | |
eb66d565 | 388 | .owner = THIS_MODULE, |
d1c6b4fe MB |
389 | }, |
390 | }; | |
391 | ||
392 | /* | |
393 | * Analogue LDOs | |
394 | */ | |
395 | ||
396 | ||
397 | #define WM831X_ALDO_SELECTOR_LOW 0xc | |
398 | #define WM831X_ALDO_MAX_SELECTOR 0x1f | |
399 | ||
400 | static int wm831x_aldo_list_voltage(struct regulator_dev *rdev, | |
401 | unsigned int selector) | |
402 | { | |
403 | /* 1-1.6V in 50mV steps */ | |
404 | if (selector <= WM831X_ALDO_SELECTOR_LOW) | |
405 | return 1000000 + (selector * 50000); | |
406 | /* 1.7-3.5V in 50mV steps */ | |
407 | if (selector <= WM831X_ALDO_MAX_SELECTOR) | |
408 | return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW) | |
409 | * 100000); | |
410 | return -EINVAL; | |
411 | } | |
412 | ||
413 | static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg, | |
414 | int min_uV, int max_uV) | |
415 | { | |
416 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
417 | struct wm831x *wm831x = ldo->wm831x; | |
418 | int vsel, ret; | |
419 | ||
420 | if (min_uV < 1000000) | |
421 | vsel = 0; | |
422 | else if (min_uV < 1700000) | |
423 | vsel = ((min_uV - 1000000) / 50000); | |
424 | else | |
425 | vsel = ((min_uV - 1700000) / 100000) | |
426 | + WM831X_ALDO_SELECTOR_LOW + 1; | |
427 | ||
428 | ret = wm831x_aldo_list_voltage(rdev, vsel); | |
429 | if (ret < 0) | |
430 | return ret; | |
431 | if (ret < min_uV || ret > max_uV) | |
432 | return -EINVAL; | |
433 | ||
434 | return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel); | |
435 | } | |
436 | ||
437 | static int wm831x_aldo_set_voltage(struct regulator_dev *rdev, | |
438 | int min_uV, int max_uV) | |
439 | { | |
440 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
441 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
442 | ||
443 | return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV); | |
444 | } | |
445 | ||
446 | static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev, | |
447 | int uV) | |
448 | { | |
449 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
450 | int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
451 | ||
452 | return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV); | |
453 | } | |
454 | ||
455 | static int wm831x_aldo_get_voltage(struct regulator_dev *rdev) | |
456 | { | |
457 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
458 | struct wm831x *wm831x = ldo->wm831x; | |
459 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
460 | int ret; | |
461 | ||
462 | ret = wm831x_reg_read(wm831x, reg); | |
463 | if (ret < 0) | |
464 | return ret; | |
465 | ||
466 | ret &= WM831X_LDO7_ON_VSEL_MASK; | |
467 | ||
468 | return wm831x_aldo_list_voltage(rdev, ret); | |
469 | } | |
470 | ||
471 | static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev) | |
472 | { | |
473 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
474 | struct wm831x *wm831x = ldo->wm831x; | |
475 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
6f17c652 | 476 | int ret; |
d1c6b4fe MB |
477 | |
478 | ret = wm831x_reg_read(wm831x, on_reg); | |
479 | if (ret < 0) | |
480 | return 0; | |
481 | ||
482 | if (ret & WM831X_LDO7_ON_MODE) | |
483 | return REGULATOR_MODE_IDLE; | |
484 | else | |
485 | return REGULATOR_MODE_NORMAL; | |
486 | } | |
487 | ||
488 | static int wm831x_aldo_set_mode(struct regulator_dev *rdev, | |
489 | unsigned int mode) | |
490 | { | |
491 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
492 | struct wm831x *wm831x = ldo->wm831x; | |
493 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
494 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
495 | int ret; | |
496 | ||
497 | ||
498 | switch (mode) { | |
499 | case REGULATOR_MODE_NORMAL: | |
500 | ret = wm831x_set_bits(wm831x, on_reg, | |
501 | WM831X_LDO7_ON_MODE, 0); | |
502 | if (ret < 0) | |
503 | return ret; | |
504 | break; | |
505 | ||
506 | case REGULATOR_MODE_IDLE: | |
507 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
508 | WM831X_LDO7_ON_MODE, | |
509 | WM831X_LDO7_ON_MODE); | |
510 | if (ret < 0) | |
511 | return ret; | |
512 | break; | |
513 | ||
514 | default: | |
515 | return -EINVAL; | |
516 | } | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
521 | static int wm831x_aldo_get_status(struct regulator_dev *rdev) | |
522 | { | |
523 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
524 | struct wm831x *wm831x = ldo->wm831x; | |
525 | int mask = 1 << rdev_get_id(rdev); | |
526 | int ret; | |
527 | ||
528 | /* Is the regulator on? */ | |
529 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
530 | if (ret < 0) | |
531 | return ret; | |
532 | if (!(ret & mask)) | |
533 | return REGULATOR_STATUS_OFF; | |
534 | ||
535 | /* Is it reporting under voltage? */ | |
536 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
537 | if (ret & mask) | |
538 | return REGULATOR_STATUS_ERROR; | |
539 | ||
540 | ret = wm831x_aldo_get_mode(rdev); | |
541 | if (ret < 0) | |
542 | return ret; | |
543 | else | |
544 | return regulator_mode_to_status(ret); | |
545 | } | |
546 | ||
547 | static struct regulator_ops wm831x_aldo_ops = { | |
548 | .list_voltage = wm831x_aldo_list_voltage, | |
549 | .get_voltage = wm831x_aldo_get_voltage, | |
550 | .set_voltage = wm831x_aldo_set_voltage, | |
551 | .set_suspend_voltage = wm831x_aldo_set_suspend_voltage, | |
552 | .get_mode = wm831x_aldo_get_mode, | |
553 | .set_mode = wm831x_aldo_set_mode, | |
554 | .get_status = wm831x_aldo_get_status, | |
555 | ||
556 | .is_enabled = wm831x_ldo_is_enabled, | |
557 | .enable = wm831x_ldo_enable, | |
558 | .disable = wm831x_ldo_disable, | |
559 | }; | |
560 | ||
561 | static __devinit int wm831x_aldo_probe(struct platform_device *pdev) | |
562 | { | |
563 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
564 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
565 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); | |
566 | struct wm831x_ldo *ldo; | |
567 | struct resource *res; | |
568 | int ret, irq; | |
569 | ||
570 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
571 | ||
572 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
573 | return -ENODEV; | |
574 | ||
575 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
576 | if (ldo == NULL) { | |
577 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
578 | return -ENOMEM; | |
579 | } | |
580 | ||
581 | ldo->wm831x = wm831x; | |
582 | ||
583 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
584 | if (res == NULL) { | |
585 | dev_err(&pdev->dev, "No I/O resource\n"); | |
586 | ret = -EINVAL; | |
587 | goto err; | |
588 | } | |
589 | ldo->base = res->start; | |
590 | ||
591 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
592 | ldo->desc.name = ldo->name; | |
593 | ldo->desc.id = id; | |
594 | ldo->desc.type = REGULATOR_VOLTAGE; | |
595 | ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1; | |
596 | ldo->desc.ops = &wm831x_aldo_ops; | |
597 | ldo->desc.owner = THIS_MODULE; | |
598 | ||
599 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
600 | pdata->ldo[id], ldo); | |
601 | if (IS_ERR(ldo->regulator)) { | |
602 | ret = PTR_ERR(ldo->regulator); | |
603 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
604 | id + 1, ret); | |
605 | goto err; | |
606 | } | |
607 | ||
608 | irq = platform_get_irq_byname(pdev, "UV"); | |
609 | ret = wm831x_request_irq(wm831x, irq, wm831x_ldo_uv_irq, | |
610 | IRQF_TRIGGER_RISING, ldo->name, | |
611 | ldo); | |
612 | if (ret != 0) { | |
613 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
614 | irq, ret); | |
615 | goto err_regulator; | |
616 | } | |
617 | ||
618 | platform_set_drvdata(pdev, ldo); | |
619 | ||
620 | return 0; | |
621 | ||
622 | err_regulator: | |
623 | regulator_unregister(ldo->regulator); | |
624 | err: | |
625 | kfree(ldo); | |
626 | return ret; | |
627 | } | |
628 | ||
629 | static __devexit int wm831x_aldo_remove(struct platform_device *pdev) | |
630 | { | |
631 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
632 | struct wm831x *wm831x = ldo->wm831x; | |
633 | ||
634 | wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), ldo); | |
635 | regulator_unregister(ldo->regulator); | |
636 | kfree(ldo); | |
637 | ||
638 | return 0; | |
639 | } | |
640 | ||
641 | static struct platform_driver wm831x_aldo_driver = { | |
642 | .probe = wm831x_aldo_probe, | |
643 | .remove = __devexit_p(wm831x_aldo_remove), | |
644 | .driver = { | |
645 | .name = "wm831x-aldo", | |
eb66d565 | 646 | .owner = THIS_MODULE, |
d1c6b4fe MB |
647 | }, |
648 | }; | |
649 | ||
650 | /* | |
651 | * Alive LDO | |
652 | */ | |
653 | ||
654 | #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf | |
655 | ||
656 | static int wm831x_alive_ldo_list_voltage(struct regulator_dev *rdev, | |
657 | unsigned int selector) | |
658 | { | |
659 | /* 0.8-1.55V in 50mV steps */ | |
660 | if (selector <= WM831X_ALIVE_LDO_MAX_SELECTOR) | |
661 | return 800000 + (selector * 50000); | |
662 | return -EINVAL; | |
663 | } | |
664 | ||
665 | static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev, | |
666 | int reg, | |
667 | int min_uV, int max_uV) | |
668 | { | |
669 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
670 | struct wm831x *wm831x = ldo->wm831x; | |
671 | int vsel, ret; | |
672 | ||
673 | vsel = (min_uV - 800000) / 50000; | |
674 | ||
675 | ret = wm831x_alive_ldo_list_voltage(rdev, vsel); | |
676 | if (ret < 0) | |
677 | return ret; | |
678 | if (ret < min_uV || ret > max_uV) | |
679 | return -EINVAL; | |
680 | ||
681 | return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel); | |
682 | } | |
683 | ||
684 | static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev, | |
685 | int min_uV, int max_uV) | |
686 | { | |
687 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
688 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
689 | ||
690 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV); | |
691 | } | |
692 | ||
693 | static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
694 | int uV) | |
695 | { | |
696 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
697 | int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL; | |
698 | ||
699 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV); | |
700 | } | |
701 | ||
702 | static int wm831x_alive_ldo_get_voltage(struct regulator_dev *rdev) | |
703 | { | |
704 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
705 | struct wm831x *wm831x = ldo->wm831x; | |
706 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
707 | int ret; | |
708 | ||
709 | ret = wm831x_reg_read(wm831x, reg); | |
710 | if (ret < 0) | |
711 | return ret; | |
712 | ||
713 | ret &= WM831X_LDO11_ON_VSEL_MASK; | |
714 | ||
715 | return wm831x_alive_ldo_list_voltage(rdev, ret); | |
716 | } | |
717 | ||
718 | static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev) | |
719 | { | |
720 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
721 | struct wm831x *wm831x = ldo->wm831x; | |
722 | int mask = 1 << rdev_get_id(rdev); | |
723 | int ret; | |
724 | ||
725 | /* Is the regulator on? */ | |
726 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
727 | if (ret < 0) | |
728 | return ret; | |
729 | if (ret & mask) | |
730 | return REGULATOR_STATUS_ON; | |
731 | else | |
732 | return REGULATOR_STATUS_OFF; | |
733 | } | |
734 | ||
735 | static struct regulator_ops wm831x_alive_ldo_ops = { | |
736 | .list_voltage = wm831x_alive_ldo_list_voltage, | |
737 | .get_voltage = wm831x_alive_ldo_get_voltage, | |
738 | .set_voltage = wm831x_alive_ldo_set_voltage, | |
739 | .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage, | |
740 | .get_status = wm831x_alive_ldo_get_status, | |
741 | ||
742 | .is_enabled = wm831x_ldo_is_enabled, | |
743 | .enable = wm831x_ldo_enable, | |
744 | .disable = wm831x_ldo_disable, | |
745 | }; | |
746 | ||
747 | static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev) | |
748 | { | |
749 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
750 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
751 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); | |
752 | struct wm831x_ldo *ldo; | |
753 | struct resource *res; | |
754 | int ret; | |
755 | ||
756 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
757 | ||
758 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
759 | return -ENODEV; | |
760 | ||
761 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
762 | if (ldo == NULL) { | |
763 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
764 | return -ENOMEM; | |
765 | } | |
766 | ||
767 | ldo->wm831x = wm831x; | |
768 | ||
769 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
770 | if (res == NULL) { | |
771 | dev_err(&pdev->dev, "No I/O resource\n"); | |
772 | ret = -EINVAL; | |
773 | goto err; | |
774 | } | |
775 | ldo->base = res->start; | |
776 | ||
777 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
778 | ldo->desc.name = ldo->name; | |
779 | ldo->desc.id = id; | |
780 | ldo->desc.type = REGULATOR_VOLTAGE; | |
781 | ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1; | |
782 | ldo->desc.ops = &wm831x_alive_ldo_ops; | |
783 | ldo->desc.owner = THIS_MODULE; | |
784 | ||
785 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
786 | pdata->ldo[id], ldo); | |
787 | if (IS_ERR(ldo->regulator)) { | |
788 | ret = PTR_ERR(ldo->regulator); | |
789 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
790 | id + 1, ret); | |
791 | goto err; | |
792 | } | |
793 | ||
794 | platform_set_drvdata(pdev, ldo); | |
795 | ||
796 | return 0; | |
797 | ||
798 | err: | |
799 | kfree(ldo); | |
800 | return ret; | |
801 | } | |
802 | ||
803 | static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev) | |
804 | { | |
805 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
806 | ||
807 | regulator_unregister(ldo->regulator); | |
808 | kfree(ldo); | |
809 | ||
810 | return 0; | |
811 | } | |
812 | ||
813 | static struct platform_driver wm831x_alive_ldo_driver = { | |
814 | .probe = wm831x_alive_ldo_probe, | |
815 | .remove = __devexit_p(wm831x_alive_ldo_remove), | |
816 | .driver = { | |
817 | .name = "wm831x-alive-ldo", | |
eb66d565 | 818 | .owner = THIS_MODULE, |
d1c6b4fe MB |
819 | }, |
820 | }; | |
821 | ||
822 | static int __init wm831x_ldo_init(void) | |
823 | { | |
824 | int ret; | |
825 | ||
826 | ret = platform_driver_register(&wm831x_gp_ldo_driver); | |
827 | if (ret != 0) | |
828 | pr_err("Failed to register WM831x GP LDO driver: %d\n", ret); | |
829 | ||
830 | ret = platform_driver_register(&wm831x_aldo_driver); | |
831 | if (ret != 0) | |
832 | pr_err("Failed to register WM831x ALDO driver: %d\n", ret); | |
833 | ||
834 | ret = platform_driver_register(&wm831x_alive_ldo_driver); | |
835 | if (ret != 0) | |
836 | pr_err("Failed to register WM831x alive LDO driver: %d\n", | |
837 | ret); | |
838 | ||
839 | return 0; | |
840 | } | |
841 | subsys_initcall(wm831x_ldo_init); | |
842 | ||
843 | static void __exit wm831x_ldo_exit(void) | |
844 | { | |
845 | platform_driver_unregister(&wm831x_alive_ldo_driver); | |
846 | platform_driver_unregister(&wm831x_aldo_driver); | |
847 | platform_driver_unregister(&wm831x_gp_ldo_driver); | |
848 | } | |
849 | module_exit(wm831x_ldo_exit); | |
850 | ||
851 | /* Module information */ | |
852 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
853 | MODULE_DESCRIPTION("WM831x LDO driver"); | |
854 | MODULE_LICENSE("GPL"); | |
855 | MODULE_ALIAS("platform:wm831x-ldo"); | |
856 | MODULE_ALIAS("platform:wm831x-aldo"); | |
857 | MODULE_ALIAS("platform:wm831x-aliveldo"); |