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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> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
d1c6b4fe MB |
23 | |
24 | #include <linux/mfd/wm831x/core.h> | |
25 | #include <linux/mfd/wm831x/regulator.h> | |
26 | #include <linux/mfd/wm831x/pdata.h> | |
27 | ||
28 | #define WM831X_LDO_MAX_NAME 6 | |
29 | ||
30 | #define WM831X_LDO_CONTROL 0 | |
31 | #define WM831X_LDO_ON_CONTROL 1 | |
32 | #define WM831X_LDO_SLEEP_CONTROL 2 | |
33 | ||
34 | #define WM831X_ALIVE_LDO_ON_CONTROL 0 | |
35 | #define WM831X_ALIVE_LDO_SLEEP_CONTROL 1 | |
36 | ||
37 | struct wm831x_ldo { | |
38 | char name[WM831X_LDO_MAX_NAME]; | |
39 | struct regulator_desc desc; | |
40 | int base; | |
41 | struct wm831x *wm831x; | |
42 | struct regulator_dev *regulator; | |
43 | }; | |
44 | ||
45 | /* | |
46 | * Shared | |
47 | */ | |
48 | ||
49 | static int wm831x_ldo_is_enabled(struct regulator_dev *rdev) | |
50 | { | |
51 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
52 | struct wm831x *wm831x = ldo->wm831x; | |
53 | int mask = 1 << rdev_get_id(rdev); | |
54 | int reg; | |
55 | ||
56 | reg = wm831x_reg_read(wm831x, WM831X_LDO_ENABLE); | |
57 | if (reg < 0) | |
58 | return reg; | |
59 | ||
60 | if (reg & mask) | |
61 | return 1; | |
62 | else | |
63 | return 0; | |
64 | } | |
65 | ||
66 | static int wm831x_ldo_enable(struct regulator_dev *rdev) | |
67 | { | |
68 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
69 | struct wm831x *wm831x = ldo->wm831x; | |
70 | int mask = 1 << rdev_get_id(rdev); | |
71 | ||
72 | return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, mask); | |
73 | } | |
74 | ||
75 | static int wm831x_ldo_disable(struct regulator_dev *rdev) | |
76 | { | |
77 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
78 | struct wm831x *wm831x = ldo->wm831x; | |
79 | int mask = 1 << rdev_get_id(rdev); | |
80 | ||
81 | return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, 0); | |
82 | } | |
83 | ||
84 | static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data) | |
85 | { | |
86 | struct wm831x_ldo *ldo = data; | |
87 | ||
88 | regulator_notifier_call_chain(ldo->regulator, | |
89 | REGULATOR_EVENT_UNDER_VOLTAGE, | |
90 | NULL); | |
91 | ||
92 | return IRQ_HANDLED; | |
93 | } | |
94 | ||
95 | /* | |
96 | * General purpose LDOs | |
97 | */ | |
98 | ||
99 | #define WM831X_GP_LDO_SELECTOR_LOW 0xe | |
100 | #define WM831X_GP_LDO_MAX_SELECTOR 0x1f | |
101 | ||
102 | static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev, | |
103 | unsigned int selector) | |
104 | { | |
105 | /* 0.9-1.6V in 50mV steps */ | |
106 | if (selector <= WM831X_GP_LDO_SELECTOR_LOW) | |
107 | return 900000 + (selector * 50000); | |
108 | /* 1.7-3.3V in 50mV steps */ | |
109 | if (selector <= WM831X_GP_LDO_MAX_SELECTOR) | |
110 | return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW) | |
111 | * 100000); | |
112 | return -EINVAL; | |
113 | } | |
114 | ||
115 | static int wm831x_gp_ldo_set_voltage_int(struct regulator_dev *rdev, int reg, | |
116 | int min_uV, int max_uV) | |
117 | { | |
118 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
119 | struct wm831x *wm831x = ldo->wm831x; | |
120 | int vsel, ret; | |
121 | ||
122 | if (min_uV < 900000) | |
123 | vsel = 0; | |
124 | else if (min_uV < 1700000) | |
125 | vsel = ((min_uV - 900000) / 50000); | |
126 | else | |
127 | vsel = ((min_uV - 1700000) / 100000) | |
128 | + WM831X_GP_LDO_SELECTOR_LOW + 1; | |
129 | ||
130 | ret = wm831x_gp_ldo_list_voltage(rdev, vsel); | |
131 | if (ret < 0) | |
132 | return ret; | |
133 | if (ret < min_uV || ret > max_uV) | |
134 | return -EINVAL; | |
135 | ||
136 | return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, vsel); | |
137 | } | |
138 | ||
139 | static int wm831x_gp_ldo_set_voltage(struct regulator_dev *rdev, | |
140 | int min_uV, int max_uV) | |
141 | { | |
142 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
143 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
144 | ||
145 | return wm831x_gp_ldo_set_voltage_int(rdev, reg, min_uV, max_uV); | |
146 | } | |
147 | ||
148 | static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
149 | int uV) | |
150 | { | |
151 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
152 | int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
153 | ||
154 | return wm831x_gp_ldo_set_voltage_int(rdev, reg, uV, uV); | |
155 | } | |
156 | ||
157 | static int wm831x_gp_ldo_get_voltage(struct regulator_dev *rdev) | |
158 | { | |
159 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
160 | struct wm831x *wm831x = ldo->wm831x; | |
161 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
162 | int ret; | |
163 | ||
164 | ret = wm831x_reg_read(wm831x, reg); | |
165 | if (ret < 0) | |
166 | return ret; | |
167 | ||
168 | ret &= WM831X_LDO1_ON_VSEL_MASK; | |
169 | ||
170 | return wm831x_gp_ldo_list_voltage(rdev, ret); | |
171 | } | |
172 | ||
173 | static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev) | |
174 | { | |
175 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
176 | struct wm831x *wm831x = ldo->wm831x; | |
177 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
178 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
9a767d43 | 179 | int ret; |
d1c6b4fe MB |
180 | |
181 | ret = wm831x_reg_read(wm831x, on_reg); | |
182 | if (ret < 0) | |
9a767d43 | 183 | return ret; |
d1c6b4fe MB |
184 | |
185 | if (!(ret & WM831X_LDO1_ON_MODE)) | |
186 | return REGULATOR_MODE_NORMAL; | |
187 | ||
188 | ret = wm831x_reg_read(wm831x, ctrl_reg); | |
189 | if (ret < 0) | |
9a767d43 | 190 | return ret; |
d1c6b4fe MB |
191 | |
192 | if (ret & WM831X_LDO1_LP_MODE) | |
193 | return REGULATOR_MODE_STANDBY; | |
194 | else | |
195 | return REGULATOR_MODE_IDLE; | |
196 | } | |
197 | ||
198 | static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev, | |
199 | unsigned int mode) | |
200 | { | |
201 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
202 | struct wm831x *wm831x = ldo->wm831x; | |
203 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
204 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
205 | int ret; | |
206 | ||
207 | ||
208 | switch (mode) { | |
209 | case REGULATOR_MODE_NORMAL: | |
210 | ret = wm831x_set_bits(wm831x, on_reg, | |
211 | WM831X_LDO1_ON_MODE, 0); | |
212 | if (ret < 0) | |
213 | return ret; | |
214 | break; | |
215 | ||
216 | case REGULATOR_MODE_IDLE: | |
217 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
e260999c | 218 | WM831X_LDO1_LP_MODE, 0); |
d1c6b4fe MB |
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; | |
e260999c | 227 | break; |
d1c6b4fe MB |
228 | |
229 | case REGULATOR_MODE_STANDBY: | |
230 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
e260999c AL |
231 | WM831X_LDO1_LP_MODE, |
232 | WM831X_LDO1_LP_MODE); | |
d1c6b4fe MB |
233 | if (ret < 0) |
234 | return ret; | |
235 | ||
236 | ret = wm831x_set_bits(wm831x, on_reg, | |
237 | WM831X_LDO1_ON_MODE, | |
238 | WM831X_LDO1_ON_MODE); | |
239 | if (ret < 0) | |
240 | return ret; | |
241 | break; | |
242 | ||
243 | default: | |
244 | return -EINVAL; | |
245 | } | |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
250 | static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev) | |
251 | { | |
252 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
253 | struct wm831x *wm831x = ldo->wm831x; | |
254 | int mask = 1 << rdev_get_id(rdev); | |
255 | int ret; | |
256 | ||
257 | /* Is the regulator on? */ | |
258 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
259 | if (ret < 0) | |
260 | return ret; | |
261 | if (!(ret & mask)) | |
262 | return REGULATOR_STATUS_OFF; | |
263 | ||
264 | /* Is it reporting under voltage? */ | |
265 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
266 | if (ret & mask) | |
267 | return REGULATOR_STATUS_ERROR; | |
268 | ||
269 | ret = wm831x_gp_ldo_get_mode(rdev); | |
270 | if (ret < 0) | |
271 | return ret; | |
272 | else | |
273 | return regulator_mode_to_status(ret); | |
274 | } | |
275 | ||
276 | static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev, | |
277 | int input_uV, | |
278 | int output_uV, int load_uA) | |
279 | { | |
280 | if (load_uA < 20000) | |
281 | return REGULATOR_MODE_STANDBY; | |
282 | if (load_uA < 50000) | |
283 | return REGULATOR_MODE_IDLE; | |
284 | return REGULATOR_MODE_NORMAL; | |
285 | } | |
286 | ||
287 | ||
288 | static struct regulator_ops wm831x_gp_ldo_ops = { | |
289 | .list_voltage = wm831x_gp_ldo_list_voltage, | |
290 | .get_voltage = wm831x_gp_ldo_get_voltage, | |
291 | .set_voltage = wm831x_gp_ldo_set_voltage, | |
292 | .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage, | |
293 | .get_mode = wm831x_gp_ldo_get_mode, | |
294 | .set_mode = wm831x_gp_ldo_set_mode, | |
295 | .get_status = wm831x_gp_ldo_get_status, | |
296 | .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode, | |
297 | ||
298 | .is_enabled = wm831x_ldo_is_enabled, | |
299 | .enable = wm831x_ldo_enable, | |
300 | .disable = wm831x_ldo_disable, | |
301 | }; | |
302 | ||
303 | static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev) | |
304 | { | |
305 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
306 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
307 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); | |
308 | struct wm831x_ldo *ldo; | |
309 | struct resource *res; | |
310 | int ret, irq; | |
311 | ||
312 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
313 | ||
314 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
315 | return -ENODEV; | |
316 | ||
317 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
318 | if (ldo == NULL) { | |
319 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
320 | return -ENOMEM; | |
321 | } | |
322 | ||
323 | ldo->wm831x = wm831x; | |
324 | ||
325 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
326 | if (res == NULL) { | |
327 | dev_err(&pdev->dev, "No I/O resource\n"); | |
328 | ret = -EINVAL; | |
329 | goto err; | |
330 | } | |
331 | ldo->base = res->start; | |
332 | ||
333 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
334 | ldo->desc.name = ldo->name; | |
335 | ldo->desc.id = id; | |
336 | ldo->desc.type = REGULATOR_VOLTAGE; | |
337 | ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1; | |
338 | ldo->desc.ops = &wm831x_gp_ldo_ops; | |
339 | ldo->desc.owner = THIS_MODULE; | |
340 | ||
341 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
342 | pdata->ldo[id], ldo); | |
343 | if (IS_ERR(ldo->regulator)) { | |
344 | ret = PTR_ERR(ldo->regulator); | |
345 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
346 | id + 1, ret); | |
347 | goto err; | |
348 | } | |
349 | ||
350 | irq = platform_get_irq_byname(pdev, "UV"); | |
351 | ret = wm831x_request_irq(wm831x, irq, wm831x_ldo_uv_irq, | |
352 | IRQF_TRIGGER_RISING, ldo->name, | |
353 | ldo); | |
354 | if (ret != 0) { | |
355 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
356 | irq, ret); | |
357 | goto err_regulator; | |
358 | } | |
359 | ||
360 | platform_set_drvdata(pdev, ldo); | |
361 | ||
362 | return 0; | |
363 | ||
364 | err_regulator: | |
365 | regulator_unregister(ldo->regulator); | |
366 | err: | |
367 | kfree(ldo); | |
368 | return ret; | |
369 | } | |
370 | ||
371 | static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev) | |
372 | { | |
373 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
374 | struct wm831x *wm831x = ldo->wm831x; | |
375 | ||
eb66d565 DT |
376 | platform_set_drvdata(pdev, NULL); |
377 | ||
d1c6b4fe MB |
378 | wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), ldo); |
379 | regulator_unregister(ldo->regulator); | |
380 | kfree(ldo); | |
381 | ||
382 | return 0; | |
383 | } | |
384 | ||
385 | static struct platform_driver wm831x_gp_ldo_driver = { | |
386 | .probe = wm831x_gp_ldo_probe, | |
387 | .remove = __devexit_p(wm831x_gp_ldo_remove), | |
388 | .driver = { | |
389 | .name = "wm831x-ldo", | |
eb66d565 | 390 | .owner = THIS_MODULE, |
d1c6b4fe MB |
391 | }, |
392 | }; | |
393 | ||
394 | /* | |
395 | * Analogue LDOs | |
396 | */ | |
397 | ||
398 | ||
399 | #define WM831X_ALDO_SELECTOR_LOW 0xc | |
400 | #define WM831X_ALDO_MAX_SELECTOR 0x1f | |
401 | ||
402 | static int wm831x_aldo_list_voltage(struct regulator_dev *rdev, | |
403 | unsigned int selector) | |
404 | { | |
405 | /* 1-1.6V in 50mV steps */ | |
406 | if (selector <= WM831X_ALDO_SELECTOR_LOW) | |
407 | return 1000000 + (selector * 50000); | |
408 | /* 1.7-3.5V in 50mV steps */ | |
409 | if (selector <= WM831X_ALDO_MAX_SELECTOR) | |
410 | return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW) | |
411 | * 100000); | |
412 | return -EINVAL; | |
413 | } | |
414 | ||
415 | static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg, | |
416 | int min_uV, int max_uV) | |
417 | { | |
418 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
419 | struct wm831x *wm831x = ldo->wm831x; | |
420 | int vsel, ret; | |
421 | ||
422 | if (min_uV < 1000000) | |
423 | vsel = 0; | |
424 | else if (min_uV < 1700000) | |
425 | vsel = ((min_uV - 1000000) / 50000); | |
426 | else | |
427 | vsel = ((min_uV - 1700000) / 100000) | |
428 | + WM831X_ALDO_SELECTOR_LOW + 1; | |
429 | ||
430 | ret = wm831x_aldo_list_voltage(rdev, vsel); | |
431 | if (ret < 0) | |
432 | return ret; | |
433 | if (ret < min_uV || ret > max_uV) | |
434 | return -EINVAL; | |
435 | ||
436 | return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel); | |
437 | } | |
438 | ||
439 | static int wm831x_aldo_set_voltage(struct regulator_dev *rdev, | |
440 | int min_uV, int max_uV) | |
441 | { | |
442 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
443 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
444 | ||
445 | return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV); | |
446 | } | |
447 | ||
448 | static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev, | |
449 | int uV) | |
450 | { | |
451 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
452 | int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
453 | ||
454 | return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV); | |
455 | } | |
456 | ||
457 | static int wm831x_aldo_get_voltage(struct regulator_dev *rdev) | |
458 | { | |
459 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
460 | struct wm831x *wm831x = ldo->wm831x; | |
461 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
462 | int ret; | |
463 | ||
464 | ret = wm831x_reg_read(wm831x, reg); | |
465 | if (ret < 0) | |
466 | return ret; | |
467 | ||
468 | ret &= WM831X_LDO7_ON_VSEL_MASK; | |
469 | ||
470 | return wm831x_aldo_list_voltage(rdev, ret); | |
471 | } | |
472 | ||
473 | static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev) | |
474 | { | |
475 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
476 | struct wm831x *wm831x = ldo->wm831x; | |
477 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
6f17c652 | 478 | int ret; |
d1c6b4fe MB |
479 | |
480 | ret = wm831x_reg_read(wm831x, on_reg); | |
481 | if (ret < 0) | |
482 | return 0; | |
483 | ||
484 | if (ret & WM831X_LDO7_ON_MODE) | |
485 | return REGULATOR_MODE_IDLE; | |
486 | else | |
487 | return REGULATOR_MODE_NORMAL; | |
488 | } | |
489 | ||
490 | static int wm831x_aldo_set_mode(struct regulator_dev *rdev, | |
491 | unsigned int mode) | |
492 | { | |
493 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
494 | struct wm831x *wm831x = ldo->wm831x; | |
495 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
496 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
497 | int ret; | |
498 | ||
499 | ||
500 | switch (mode) { | |
501 | case REGULATOR_MODE_NORMAL: | |
502 | ret = wm831x_set_bits(wm831x, on_reg, | |
503 | WM831X_LDO7_ON_MODE, 0); | |
504 | if (ret < 0) | |
505 | return ret; | |
506 | break; | |
507 | ||
508 | case REGULATOR_MODE_IDLE: | |
509 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
510 | WM831X_LDO7_ON_MODE, | |
511 | WM831X_LDO7_ON_MODE); | |
512 | if (ret < 0) | |
513 | return ret; | |
514 | break; | |
515 | ||
516 | default: | |
517 | return -EINVAL; | |
518 | } | |
519 | ||
520 | return 0; | |
521 | } | |
522 | ||
523 | static int wm831x_aldo_get_status(struct regulator_dev *rdev) | |
524 | { | |
525 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
526 | struct wm831x *wm831x = ldo->wm831x; | |
527 | int mask = 1 << rdev_get_id(rdev); | |
528 | int ret; | |
529 | ||
530 | /* Is the regulator on? */ | |
531 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
532 | if (ret < 0) | |
533 | return ret; | |
534 | if (!(ret & mask)) | |
535 | return REGULATOR_STATUS_OFF; | |
536 | ||
537 | /* Is it reporting under voltage? */ | |
538 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
539 | if (ret & mask) | |
540 | return REGULATOR_STATUS_ERROR; | |
541 | ||
542 | ret = wm831x_aldo_get_mode(rdev); | |
543 | if (ret < 0) | |
544 | return ret; | |
545 | else | |
546 | return regulator_mode_to_status(ret); | |
547 | } | |
548 | ||
549 | static struct regulator_ops wm831x_aldo_ops = { | |
550 | .list_voltage = wm831x_aldo_list_voltage, | |
551 | .get_voltage = wm831x_aldo_get_voltage, | |
552 | .set_voltage = wm831x_aldo_set_voltage, | |
553 | .set_suspend_voltage = wm831x_aldo_set_suspend_voltage, | |
554 | .get_mode = wm831x_aldo_get_mode, | |
555 | .set_mode = wm831x_aldo_set_mode, | |
556 | .get_status = wm831x_aldo_get_status, | |
557 | ||
558 | .is_enabled = wm831x_ldo_is_enabled, | |
559 | .enable = wm831x_ldo_enable, | |
560 | .disable = wm831x_ldo_disable, | |
561 | }; | |
562 | ||
563 | static __devinit int wm831x_aldo_probe(struct platform_device *pdev) | |
564 | { | |
565 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
566 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
567 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); | |
568 | struct wm831x_ldo *ldo; | |
569 | struct resource *res; | |
570 | int ret, irq; | |
571 | ||
572 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
573 | ||
574 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
575 | return -ENODEV; | |
576 | ||
577 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
578 | if (ldo == NULL) { | |
579 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
580 | return -ENOMEM; | |
581 | } | |
582 | ||
583 | ldo->wm831x = wm831x; | |
584 | ||
585 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
586 | if (res == NULL) { | |
587 | dev_err(&pdev->dev, "No I/O resource\n"); | |
588 | ret = -EINVAL; | |
589 | goto err; | |
590 | } | |
591 | ldo->base = res->start; | |
592 | ||
593 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
594 | ldo->desc.name = ldo->name; | |
595 | ldo->desc.id = id; | |
596 | ldo->desc.type = REGULATOR_VOLTAGE; | |
597 | ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1; | |
598 | ldo->desc.ops = &wm831x_aldo_ops; | |
599 | ldo->desc.owner = THIS_MODULE; | |
600 | ||
601 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
602 | pdata->ldo[id], ldo); | |
603 | if (IS_ERR(ldo->regulator)) { | |
604 | ret = PTR_ERR(ldo->regulator); | |
605 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
606 | id + 1, ret); | |
607 | goto err; | |
608 | } | |
609 | ||
610 | irq = platform_get_irq_byname(pdev, "UV"); | |
611 | ret = wm831x_request_irq(wm831x, irq, wm831x_ldo_uv_irq, | |
612 | IRQF_TRIGGER_RISING, ldo->name, | |
613 | ldo); | |
614 | if (ret != 0) { | |
615 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
616 | irq, ret); | |
617 | goto err_regulator; | |
618 | } | |
619 | ||
620 | platform_set_drvdata(pdev, ldo); | |
621 | ||
622 | return 0; | |
623 | ||
624 | err_regulator: | |
625 | regulator_unregister(ldo->regulator); | |
626 | err: | |
627 | kfree(ldo); | |
628 | return ret; | |
629 | } | |
630 | ||
631 | static __devexit int wm831x_aldo_remove(struct platform_device *pdev) | |
632 | { | |
633 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
634 | struct wm831x *wm831x = ldo->wm831x; | |
635 | ||
636 | wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), ldo); | |
637 | regulator_unregister(ldo->regulator); | |
638 | kfree(ldo); | |
639 | ||
640 | return 0; | |
641 | } | |
642 | ||
643 | static struct platform_driver wm831x_aldo_driver = { | |
644 | .probe = wm831x_aldo_probe, | |
645 | .remove = __devexit_p(wm831x_aldo_remove), | |
646 | .driver = { | |
647 | .name = "wm831x-aldo", | |
eb66d565 | 648 | .owner = THIS_MODULE, |
d1c6b4fe MB |
649 | }, |
650 | }; | |
651 | ||
652 | /* | |
653 | * Alive LDO | |
654 | */ | |
655 | ||
656 | #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf | |
657 | ||
658 | static int wm831x_alive_ldo_list_voltage(struct regulator_dev *rdev, | |
659 | unsigned int selector) | |
660 | { | |
661 | /* 0.8-1.55V in 50mV steps */ | |
662 | if (selector <= WM831X_ALIVE_LDO_MAX_SELECTOR) | |
663 | return 800000 + (selector * 50000); | |
664 | return -EINVAL; | |
665 | } | |
666 | ||
667 | static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev, | |
668 | int reg, | |
669 | int min_uV, int max_uV) | |
670 | { | |
671 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
672 | struct wm831x *wm831x = ldo->wm831x; | |
673 | int vsel, ret; | |
674 | ||
675 | vsel = (min_uV - 800000) / 50000; | |
676 | ||
677 | ret = wm831x_alive_ldo_list_voltage(rdev, vsel); | |
678 | if (ret < 0) | |
679 | return ret; | |
680 | if (ret < min_uV || ret > max_uV) | |
681 | return -EINVAL; | |
682 | ||
683 | return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel); | |
684 | } | |
685 | ||
686 | static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev, | |
687 | int min_uV, int max_uV) | |
688 | { | |
689 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
690 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
691 | ||
692 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV); | |
693 | } | |
694 | ||
695 | static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
696 | int uV) | |
697 | { | |
698 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
699 | int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL; | |
700 | ||
701 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV); | |
702 | } | |
703 | ||
704 | static int wm831x_alive_ldo_get_voltage(struct regulator_dev *rdev) | |
705 | { | |
706 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
707 | struct wm831x *wm831x = ldo->wm831x; | |
708 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
709 | int ret; | |
710 | ||
711 | ret = wm831x_reg_read(wm831x, reg); | |
712 | if (ret < 0) | |
713 | return ret; | |
714 | ||
715 | ret &= WM831X_LDO11_ON_VSEL_MASK; | |
716 | ||
717 | return wm831x_alive_ldo_list_voltage(rdev, ret); | |
718 | } | |
719 | ||
720 | static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev) | |
721 | { | |
722 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
723 | struct wm831x *wm831x = ldo->wm831x; | |
724 | int mask = 1 << rdev_get_id(rdev); | |
725 | int ret; | |
726 | ||
727 | /* Is the regulator on? */ | |
728 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
729 | if (ret < 0) | |
730 | return ret; | |
731 | if (ret & mask) | |
732 | return REGULATOR_STATUS_ON; | |
733 | else | |
734 | return REGULATOR_STATUS_OFF; | |
735 | } | |
736 | ||
737 | static struct regulator_ops wm831x_alive_ldo_ops = { | |
738 | .list_voltage = wm831x_alive_ldo_list_voltage, | |
739 | .get_voltage = wm831x_alive_ldo_get_voltage, | |
740 | .set_voltage = wm831x_alive_ldo_set_voltage, | |
741 | .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage, | |
742 | .get_status = wm831x_alive_ldo_get_status, | |
743 | ||
744 | .is_enabled = wm831x_ldo_is_enabled, | |
745 | .enable = wm831x_ldo_enable, | |
746 | .disable = wm831x_ldo_disable, | |
747 | }; | |
748 | ||
749 | static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev) | |
750 | { | |
751 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
752 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
753 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); | |
754 | struct wm831x_ldo *ldo; | |
755 | struct resource *res; | |
756 | int ret; | |
757 | ||
758 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
759 | ||
760 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
761 | return -ENODEV; | |
762 | ||
763 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
764 | if (ldo == NULL) { | |
765 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
766 | return -ENOMEM; | |
767 | } | |
768 | ||
769 | ldo->wm831x = wm831x; | |
770 | ||
771 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
772 | if (res == NULL) { | |
773 | dev_err(&pdev->dev, "No I/O resource\n"); | |
774 | ret = -EINVAL; | |
775 | goto err; | |
776 | } | |
777 | ldo->base = res->start; | |
778 | ||
779 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
780 | ldo->desc.name = ldo->name; | |
781 | ldo->desc.id = id; | |
782 | ldo->desc.type = REGULATOR_VOLTAGE; | |
783 | ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1; | |
784 | ldo->desc.ops = &wm831x_alive_ldo_ops; | |
785 | ldo->desc.owner = THIS_MODULE; | |
786 | ||
787 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
788 | pdata->ldo[id], ldo); | |
789 | if (IS_ERR(ldo->regulator)) { | |
790 | ret = PTR_ERR(ldo->regulator); | |
791 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
792 | id + 1, ret); | |
793 | goto err; | |
794 | } | |
795 | ||
796 | platform_set_drvdata(pdev, ldo); | |
797 | ||
798 | return 0; | |
799 | ||
800 | err: | |
801 | kfree(ldo); | |
802 | return ret; | |
803 | } | |
804 | ||
805 | static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev) | |
806 | { | |
807 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
808 | ||
809 | regulator_unregister(ldo->regulator); | |
810 | kfree(ldo); | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
815 | static struct platform_driver wm831x_alive_ldo_driver = { | |
816 | .probe = wm831x_alive_ldo_probe, | |
817 | .remove = __devexit_p(wm831x_alive_ldo_remove), | |
818 | .driver = { | |
819 | .name = "wm831x-alive-ldo", | |
eb66d565 | 820 | .owner = THIS_MODULE, |
d1c6b4fe MB |
821 | }, |
822 | }; | |
823 | ||
824 | static int __init wm831x_ldo_init(void) | |
825 | { | |
826 | int ret; | |
827 | ||
828 | ret = platform_driver_register(&wm831x_gp_ldo_driver); | |
829 | if (ret != 0) | |
830 | pr_err("Failed to register WM831x GP LDO driver: %d\n", ret); | |
831 | ||
832 | ret = platform_driver_register(&wm831x_aldo_driver); | |
833 | if (ret != 0) | |
834 | pr_err("Failed to register WM831x ALDO driver: %d\n", ret); | |
835 | ||
836 | ret = platform_driver_register(&wm831x_alive_ldo_driver); | |
837 | if (ret != 0) | |
838 | pr_err("Failed to register WM831x alive LDO driver: %d\n", | |
839 | ret); | |
840 | ||
841 | return 0; | |
842 | } | |
843 | subsys_initcall(wm831x_ldo_init); | |
844 | ||
845 | static void __exit wm831x_ldo_exit(void) | |
846 | { | |
847 | platform_driver_unregister(&wm831x_alive_ldo_driver); | |
848 | platform_driver_unregister(&wm831x_aldo_driver); | |
849 | platform_driver_unregister(&wm831x_gp_ldo_driver); | |
850 | } | |
851 | module_exit(wm831x_ldo_exit); | |
852 | ||
853 | /* Module information */ | |
854 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
855 | MODULE_DESCRIPTION("WM831x LDO driver"); | |
856 | MODULE_LICENSE("GPL"); | |
857 | MODULE_ALIAS("platform:wm831x-ldo"); | |
858 | MODULE_ALIAS("platform:wm831x-aldo"); | |
859 | MODULE_ALIAS("platform:wm831x-aliveldo"); |