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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; | |
178 | unsigned int ret; | |
179 | ||
180 | ret = wm831x_reg_read(wm831x, on_reg); | |
181 | if (ret < 0) | |
182 | return 0; | |
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) | |
189 | return 0; | |
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 | ||
374 | wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), ldo); | |
375 | regulator_unregister(ldo->regulator); | |
376 | kfree(ldo); | |
377 | ||
378 | return 0; | |
379 | } | |
380 | ||
381 | static struct platform_driver wm831x_gp_ldo_driver = { | |
382 | .probe = wm831x_gp_ldo_probe, | |
383 | .remove = __devexit_p(wm831x_gp_ldo_remove), | |
384 | .driver = { | |
385 | .name = "wm831x-ldo", | |
386 | }, | |
387 | }; | |
388 | ||
389 | /* | |
390 | * Analogue LDOs | |
391 | */ | |
392 | ||
393 | ||
394 | #define WM831X_ALDO_SELECTOR_LOW 0xc | |
395 | #define WM831X_ALDO_MAX_SELECTOR 0x1f | |
396 | ||
397 | static int wm831x_aldo_list_voltage(struct regulator_dev *rdev, | |
398 | unsigned int selector) | |
399 | { | |
400 | /* 1-1.6V in 50mV steps */ | |
401 | if (selector <= WM831X_ALDO_SELECTOR_LOW) | |
402 | return 1000000 + (selector * 50000); | |
403 | /* 1.7-3.5V in 50mV steps */ | |
404 | if (selector <= WM831X_ALDO_MAX_SELECTOR) | |
405 | return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW) | |
406 | * 100000); | |
407 | return -EINVAL; | |
408 | } | |
409 | ||
410 | static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg, | |
411 | int min_uV, int max_uV) | |
412 | { | |
413 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
414 | struct wm831x *wm831x = ldo->wm831x; | |
415 | int vsel, ret; | |
416 | ||
417 | if (min_uV < 1000000) | |
418 | vsel = 0; | |
419 | else if (min_uV < 1700000) | |
420 | vsel = ((min_uV - 1000000) / 50000); | |
421 | else | |
422 | vsel = ((min_uV - 1700000) / 100000) | |
423 | + WM831X_ALDO_SELECTOR_LOW + 1; | |
424 | ||
425 | ret = wm831x_aldo_list_voltage(rdev, vsel); | |
426 | if (ret < 0) | |
427 | return ret; | |
428 | if (ret < min_uV || ret > max_uV) | |
429 | return -EINVAL; | |
430 | ||
431 | return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel); | |
432 | } | |
433 | ||
434 | static int wm831x_aldo_set_voltage(struct regulator_dev *rdev, | |
435 | int min_uV, int max_uV) | |
436 | { | |
437 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
438 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
439 | ||
440 | return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV); | |
441 | } | |
442 | ||
443 | static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev, | |
444 | int uV) | |
445 | { | |
446 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
447 | int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
448 | ||
449 | return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV); | |
450 | } | |
451 | ||
452 | static int wm831x_aldo_get_voltage(struct regulator_dev *rdev) | |
453 | { | |
454 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
455 | struct wm831x *wm831x = ldo->wm831x; | |
456 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
457 | int ret; | |
458 | ||
459 | ret = wm831x_reg_read(wm831x, reg); | |
460 | if (ret < 0) | |
461 | return ret; | |
462 | ||
463 | ret &= WM831X_LDO7_ON_VSEL_MASK; | |
464 | ||
465 | return wm831x_aldo_list_voltage(rdev, ret); | |
466 | } | |
467 | ||
468 | static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev) | |
469 | { | |
470 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
471 | struct wm831x *wm831x = ldo->wm831x; | |
472 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
473 | unsigned int ret; | |
474 | ||
475 | ret = wm831x_reg_read(wm831x, on_reg); | |
476 | if (ret < 0) | |
477 | return 0; | |
478 | ||
479 | if (ret & WM831X_LDO7_ON_MODE) | |
480 | return REGULATOR_MODE_IDLE; | |
481 | else | |
482 | return REGULATOR_MODE_NORMAL; | |
483 | } | |
484 | ||
485 | static int wm831x_aldo_set_mode(struct regulator_dev *rdev, | |
486 | unsigned int mode) | |
487 | { | |
488 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
489 | struct wm831x *wm831x = ldo->wm831x; | |
490 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
491 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
492 | int ret; | |
493 | ||
494 | ||
495 | switch (mode) { | |
496 | case REGULATOR_MODE_NORMAL: | |
497 | ret = wm831x_set_bits(wm831x, on_reg, | |
498 | WM831X_LDO7_ON_MODE, 0); | |
499 | if (ret < 0) | |
500 | return ret; | |
501 | break; | |
502 | ||
503 | case REGULATOR_MODE_IDLE: | |
504 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
505 | WM831X_LDO7_ON_MODE, | |
506 | WM831X_LDO7_ON_MODE); | |
507 | if (ret < 0) | |
508 | return ret; | |
509 | break; | |
510 | ||
511 | default: | |
512 | return -EINVAL; | |
513 | } | |
514 | ||
515 | return 0; | |
516 | } | |
517 | ||
518 | static int wm831x_aldo_get_status(struct regulator_dev *rdev) | |
519 | { | |
520 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
521 | struct wm831x *wm831x = ldo->wm831x; | |
522 | int mask = 1 << rdev_get_id(rdev); | |
523 | int ret; | |
524 | ||
525 | /* Is the regulator on? */ | |
526 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
527 | if (ret < 0) | |
528 | return ret; | |
529 | if (!(ret & mask)) | |
530 | return REGULATOR_STATUS_OFF; | |
531 | ||
532 | /* Is it reporting under voltage? */ | |
533 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
534 | if (ret & mask) | |
535 | return REGULATOR_STATUS_ERROR; | |
536 | ||
537 | ret = wm831x_aldo_get_mode(rdev); | |
538 | if (ret < 0) | |
539 | return ret; | |
540 | else | |
541 | return regulator_mode_to_status(ret); | |
542 | } | |
543 | ||
544 | static struct regulator_ops wm831x_aldo_ops = { | |
545 | .list_voltage = wm831x_aldo_list_voltage, | |
546 | .get_voltage = wm831x_aldo_get_voltage, | |
547 | .set_voltage = wm831x_aldo_set_voltage, | |
548 | .set_suspend_voltage = wm831x_aldo_set_suspend_voltage, | |
549 | .get_mode = wm831x_aldo_get_mode, | |
550 | .set_mode = wm831x_aldo_set_mode, | |
551 | .get_status = wm831x_aldo_get_status, | |
552 | ||
553 | .is_enabled = wm831x_ldo_is_enabled, | |
554 | .enable = wm831x_ldo_enable, | |
555 | .disable = wm831x_ldo_disable, | |
556 | }; | |
557 | ||
558 | static __devinit int wm831x_aldo_probe(struct platform_device *pdev) | |
559 | { | |
560 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
561 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
562 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); | |
563 | struct wm831x_ldo *ldo; | |
564 | struct resource *res; | |
565 | int ret, irq; | |
566 | ||
567 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
568 | ||
569 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
570 | return -ENODEV; | |
571 | ||
572 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
573 | if (ldo == NULL) { | |
574 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
575 | return -ENOMEM; | |
576 | } | |
577 | ||
578 | ldo->wm831x = wm831x; | |
579 | ||
580 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
581 | if (res == NULL) { | |
582 | dev_err(&pdev->dev, "No I/O resource\n"); | |
583 | ret = -EINVAL; | |
584 | goto err; | |
585 | } | |
586 | ldo->base = res->start; | |
587 | ||
588 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
589 | ldo->desc.name = ldo->name; | |
590 | ldo->desc.id = id; | |
591 | ldo->desc.type = REGULATOR_VOLTAGE; | |
592 | ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1; | |
593 | ldo->desc.ops = &wm831x_aldo_ops; | |
594 | ldo->desc.owner = THIS_MODULE; | |
595 | ||
596 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
597 | pdata->ldo[id], ldo); | |
598 | if (IS_ERR(ldo->regulator)) { | |
599 | ret = PTR_ERR(ldo->regulator); | |
600 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
601 | id + 1, ret); | |
602 | goto err; | |
603 | } | |
604 | ||
605 | irq = platform_get_irq_byname(pdev, "UV"); | |
606 | ret = wm831x_request_irq(wm831x, irq, wm831x_ldo_uv_irq, | |
607 | IRQF_TRIGGER_RISING, ldo->name, | |
608 | ldo); | |
609 | if (ret != 0) { | |
610 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
611 | irq, ret); | |
612 | goto err_regulator; | |
613 | } | |
614 | ||
615 | platform_set_drvdata(pdev, ldo); | |
616 | ||
617 | return 0; | |
618 | ||
619 | err_regulator: | |
620 | regulator_unregister(ldo->regulator); | |
621 | err: | |
622 | kfree(ldo); | |
623 | return ret; | |
624 | } | |
625 | ||
626 | static __devexit int wm831x_aldo_remove(struct platform_device *pdev) | |
627 | { | |
628 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
629 | struct wm831x *wm831x = ldo->wm831x; | |
630 | ||
631 | wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), ldo); | |
632 | regulator_unregister(ldo->regulator); | |
633 | kfree(ldo); | |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
638 | static struct platform_driver wm831x_aldo_driver = { | |
639 | .probe = wm831x_aldo_probe, | |
640 | .remove = __devexit_p(wm831x_aldo_remove), | |
641 | .driver = { | |
642 | .name = "wm831x-aldo", | |
643 | }, | |
644 | }; | |
645 | ||
646 | /* | |
647 | * Alive LDO | |
648 | */ | |
649 | ||
650 | #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf | |
651 | ||
652 | static int wm831x_alive_ldo_list_voltage(struct regulator_dev *rdev, | |
653 | unsigned int selector) | |
654 | { | |
655 | /* 0.8-1.55V in 50mV steps */ | |
656 | if (selector <= WM831X_ALIVE_LDO_MAX_SELECTOR) | |
657 | return 800000 + (selector * 50000); | |
658 | return -EINVAL; | |
659 | } | |
660 | ||
661 | static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev, | |
662 | int reg, | |
663 | int min_uV, int max_uV) | |
664 | { | |
665 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
666 | struct wm831x *wm831x = ldo->wm831x; | |
667 | int vsel, ret; | |
668 | ||
669 | vsel = (min_uV - 800000) / 50000; | |
670 | ||
671 | ret = wm831x_alive_ldo_list_voltage(rdev, vsel); | |
672 | if (ret < 0) | |
673 | return ret; | |
674 | if (ret < min_uV || ret > max_uV) | |
675 | return -EINVAL; | |
676 | ||
677 | return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel); | |
678 | } | |
679 | ||
680 | static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev, | |
681 | int min_uV, int max_uV) | |
682 | { | |
683 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
684 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
685 | ||
686 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV); | |
687 | } | |
688 | ||
689 | static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
690 | int uV) | |
691 | { | |
692 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
693 | int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL; | |
694 | ||
695 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV); | |
696 | } | |
697 | ||
698 | static int wm831x_alive_ldo_get_voltage(struct regulator_dev *rdev) | |
699 | { | |
700 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
701 | struct wm831x *wm831x = ldo->wm831x; | |
702 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
703 | int ret; | |
704 | ||
705 | ret = wm831x_reg_read(wm831x, reg); | |
706 | if (ret < 0) | |
707 | return ret; | |
708 | ||
709 | ret &= WM831X_LDO11_ON_VSEL_MASK; | |
710 | ||
711 | return wm831x_alive_ldo_list_voltage(rdev, ret); | |
712 | } | |
713 | ||
714 | static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev) | |
715 | { | |
716 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
717 | struct wm831x *wm831x = ldo->wm831x; | |
718 | int mask = 1 << rdev_get_id(rdev); | |
719 | int ret; | |
720 | ||
721 | /* Is the regulator on? */ | |
722 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
723 | if (ret < 0) | |
724 | return ret; | |
725 | if (ret & mask) | |
726 | return REGULATOR_STATUS_ON; | |
727 | else | |
728 | return REGULATOR_STATUS_OFF; | |
729 | } | |
730 | ||
731 | static struct regulator_ops wm831x_alive_ldo_ops = { | |
732 | .list_voltage = wm831x_alive_ldo_list_voltage, | |
733 | .get_voltage = wm831x_alive_ldo_get_voltage, | |
734 | .set_voltage = wm831x_alive_ldo_set_voltage, | |
735 | .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage, | |
736 | .get_status = wm831x_alive_ldo_get_status, | |
737 | ||
738 | .is_enabled = wm831x_ldo_is_enabled, | |
739 | .enable = wm831x_ldo_enable, | |
740 | .disable = wm831x_ldo_disable, | |
741 | }; | |
742 | ||
743 | static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev) | |
744 | { | |
745 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
746 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
747 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); | |
748 | struct wm831x_ldo *ldo; | |
749 | struct resource *res; | |
750 | int ret; | |
751 | ||
752 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
753 | ||
754 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
755 | return -ENODEV; | |
756 | ||
757 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
758 | if (ldo == NULL) { | |
759 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
760 | return -ENOMEM; | |
761 | } | |
762 | ||
763 | ldo->wm831x = wm831x; | |
764 | ||
765 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
766 | if (res == NULL) { | |
767 | dev_err(&pdev->dev, "No I/O resource\n"); | |
768 | ret = -EINVAL; | |
769 | goto err; | |
770 | } | |
771 | ldo->base = res->start; | |
772 | ||
773 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
774 | ldo->desc.name = ldo->name; | |
775 | ldo->desc.id = id; | |
776 | ldo->desc.type = REGULATOR_VOLTAGE; | |
777 | ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1; | |
778 | ldo->desc.ops = &wm831x_alive_ldo_ops; | |
779 | ldo->desc.owner = THIS_MODULE; | |
780 | ||
781 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
782 | pdata->ldo[id], ldo); | |
783 | if (IS_ERR(ldo->regulator)) { | |
784 | ret = PTR_ERR(ldo->regulator); | |
785 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
786 | id + 1, ret); | |
787 | goto err; | |
788 | } | |
789 | ||
790 | platform_set_drvdata(pdev, ldo); | |
791 | ||
792 | return 0; | |
793 | ||
794 | err: | |
795 | kfree(ldo); | |
796 | return ret; | |
797 | } | |
798 | ||
799 | static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev) | |
800 | { | |
801 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
802 | ||
803 | regulator_unregister(ldo->regulator); | |
804 | kfree(ldo); | |
805 | ||
806 | return 0; | |
807 | } | |
808 | ||
809 | static struct platform_driver wm831x_alive_ldo_driver = { | |
810 | .probe = wm831x_alive_ldo_probe, | |
811 | .remove = __devexit_p(wm831x_alive_ldo_remove), | |
812 | .driver = { | |
813 | .name = "wm831x-alive-ldo", | |
814 | }, | |
815 | }; | |
816 | ||
817 | static int __init wm831x_ldo_init(void) | |
818 | { | |
819 | int ret; | |
820 | ||
821 | ret = platform_driver_register(&wm831x_gp_ldo_driver); | |
822 | if (ret != 0) | |
823 | pr_err("Failed to register WM831x GP LDO driver: %d\n", ret); | |
824 | ||
825 | ret = platform_driver_register(&wm831x_aldo_driver); | |
826 | if (ret != 0) | |
827 | pr_err("Failed to register WM831x ALDO driver: %d\n", ret); | |
828 | ||
829 | ret = platform_driver_register(&wm831x_alive_ldo_driver); | |
830 | if (ret != 0) | |
831 | pr_err("Failed to register WM831x alive LDO driver: %d\n", | |
832 | ret); | |
833 | ||
834 | return 0; | |
835 | } | |
836 | subsys_initcall(wm831x_ldo_init); | |
837 | ||
838 | static void __exit wm831x_ldo_exit(void) | |
839 | { | |
840 | platform_driver_unregister(&wm831x_alive_ldo_driver); | |
841 | platform_driver_unregister(&wm831x_aldo_driver); | |
842 | platform_driver_unregister(&wm831x_gp_ldo_driver); | |
843 | } | |
844 | module_exit(wm831x_ldo_exit); | |
845 | ||
846 | /* Module information */ | |
847 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
848 | MODULE_DESCRIPTION("WM831x LDO driver"); | |
849 | MODULE_LICENSE("GPL"); | |
850 | MODULE_ALIAS("platform:wm831x-ldo"); | |
851 | MODULE_ALIAS("platform:wm831x-aldo"); | |
852 | MODULE_ALIAS("platform:wm831x-aliveldo"); |