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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, | |
218 | WM831X_LDO1_LP_MODE, | |
219 | WM831X_LDO1_LP_MODE); | |
220 | if (ret < 0) | |
221 | return ret; | |
222 | ||
223 | ret = wm831x_set_bits(wm831x, on_reg, | |
224 | WM831X_LDO1_ON_MODE, | |
225 | WM831X_LDO1_ON_MODE); | |
226 | if (ret < 0) | |
227 | return ret; | |
228 | ||
229 | case REGULATOR_MODE_STANDBY: | |
230 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
231 | WM831X_LDO1_LP_MODE, 0); | |
232 | if (ret < 0) | |
233 | return ret; | |
234 | ||
235 | ret = wm831x_set_bits(wm831x, on_reg, | |
236 | WM831X_LDO1_ON_MODE, | |
237 | WM831X_LDO1_ON_MODE); | |
238 | if (ret < 0) | |
239 | return ret; | |
240 | break; | |
241 | ||
242 | default: | |
243 | return -EINVAL; | |
244 | } | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
249 | static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev) | |
250 | { | |
251 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
252 | struct wm831x *wm831x = ldo->wm831x; | |
253 | int mask = 1 << rdev_get_id(rdev); | |
254 | int ret; | |
255 | ||
256 | /* Is the regulator on? */ | |
257 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
258 | if (ret < 0) | |
259 | return ret; | |
260 | if (!(ret & mask)) | |
261 | return REGULATOR_STATUS_OFF; | |
262 | ||
263 | /* Is it reporting under voltage? */ | |
264 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
265 | if (ret & mask) | |
266 | return REGULATOR_STATUS_ERROR; | |
267 | ||
268 | ret = wm831x_gp_ldo_get_mode(rdev); | |
269 | if (ret < 0) | |
270 | return ret; | |
271 | else | |
272 | return regulator_mode_to_status(ret); | |
273 | } | |
274 | ||
275 | static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev, | |
276 | int input_uV, | |
277 | int output_uV, int load_uA) | |
278 | { | |
279 | if (load_uA < 20000) | |
280 | return REGULATOR_MODE_STANDBY; | |
281 | if (load_uA < 50000) | |
282 | return REGULATOR_MODE_IDLE; | |
283 | return REGULATOR_MODE_NORMAL; | |
284 | } | |
285 | ||
286 | ||
287 | static struct regulator_ops wm831x_gp_ldo_ops = { | |
288 | .list_voltage = wm831x_gp_ldo_list_voltage, | |
289 | .get_voltage = wm831x_gp_ldo_get_voltage, | |
290 | .set_voltage = wm831x_gp_ldo_set_voltage, | |
291 | .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage, | |
292 | .get_mode = wm831x_gp_ldo_get_mode, | |
293 | .set_mode = wm831x_gp_ldo_set_mode, | |
294 | .get_status = wm831x_gp_ldo_get_status, | |
295 | .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode, | |
296 | ||
297 | .is_enabled = wm831x_ldo_is_enabled, | |
298 | .enable = wm831x_ldo_enable, | |
299 | .disable = wm831x_ldo_disable, | |
300 | }; | |
301 | ||
302 | static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev) | |
303 | { | |
304 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
305 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
306 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); | |
307 | struct wm831x_ldo *ldo; | |
308 | struct resource *res; | |
309 | int ret, irq; | |
310 | ||
311 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
312 | ||
313 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
314 | return -ENODEV; | |
315 | ||
316 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
317 | if (ldo == NULL) { | |
318 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
319 | return -ENOMEM; | |
320 | } | |
321 | ||
322 | ldo->wm831x = wm831x; | |
323 | ||
324 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
325 | if (res == NULL) { | |
326 | dev_err(&pdev->dev, "No I/O resource\n"); | |
327 | ret = -EINVAL; | |
328 | goto err; | |
329 | } | |
330 | ldo->base = res->start; | |
331 | ||
332 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
333 | ldo->desc.name = ldo->name; | |
334 | ldo->desc.id = id; | |
335 | ldo->desc.type = REGULATOR_VOLTAGE; | |
336 | ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1; | |
337 | ldo->desc.ops = &wm831x_gp_ldo_ops; | |
338 | ldo->desc.owner = THIS_MODULE; | |
339 | ||
340 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
341 | pdata->ldo[id], ldo); | |
342 | if (IS_ERR(ldo->regulator)) { | |
343 | ret = PTR_ERR(ldo->regulator); | |
344 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
345 | id + 1, ret); | |
346 | goto err; | |
347 | } | |
348 | ||
349 | irq = platform_get_irq_byname(pdev, "UV"); | |
350 | ret = wm831x_request_irq(wm831x, irq, wm831x_ldo_uv_irq, | |
351 | IRQF_TRIGGER_RISING, ldo->name, | |
352 | ldo); | |
353 | if (ret != 0) { | |
354 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
355 | irq, ret); | |
356 | goto err_regulator; | |
357 | } | |
358 | ||
359 | platform_set_drvdata(pdev, ldo); | |
360 | ||
361 | return 0; | |
362 | ||
363 | err_regulator: | |
364 | regulator_unregister(ldo->regulator); | |
365 | err: | |
366 | kfree(ldo); | |
367 | return ret; | |
368 | } | |
369 | ||
370 | static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev) | |
371 | { | |
372 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
373 | struct wm831x *wm831x = ldo->wm831x; | |
374 | ||
eb66d565 DT |
375 | platform_set_drvdata(pdev, NULL); |
376 | ||
d1c6b4fe MB |
377 | wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), ldo); |
378 | regulator_unregister(ldo->regulator); | |
379 | kfree(ldo); | |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
384 | static struct platform_driver wm831x_gp_ldo_driver = { | |
385 | .probe = wm831x_gp_ldo_probe, | |
386 | .remove = __devexit_p(wm831x_gp_ldo_remove), | |
387 | .driver = { | |
388 | .name = "wm831x-ldo", | |
eb66d565 | 389 | .owner = THIS_MODULE, |
d1c6b4fe MB |
390 | }, |
391 | }; | |
392 | ||
393 | /* | |
394 | * Analogue LDOs | |
395 | */ | |
396 | ||
397 | ||
398 | #define WM831X_ALDO_SELECTOR_LOW 0xc | |
399 | #define WM831X_ALDO_MAX_SELECTOR 0x1f | |
400 | ||
401 | static int wm831x_aldo_list_voltage(struct regulator_dev *rdev, | |
402 | unsigned int selector) | |
403 | { | |
404 | /* 1-1.6V in 50mV steps */ | |
405 | if (selector <= WM831X_ALDO_SELECTOR_LOW) | |
406 | return 1000000 + (selector * 50000); | |
407 | /* 1.7-3.5V in 50mV steps */ | |
408 | if (selector <= WM831X_ALDO_MAX_SELECTOR) | |
409 | return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW) | |
410 | * 100000); | |
411 | return -EINVAL; | |
412 | } | |
413 | ||
414 | static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg, | |
415 | int min_uV, int max_uV) | |
416 | { | |
417 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
418 | struct wm831x *wm831x = ldo->wm831x; | |
419 | int vsel, ret; | |
420 | ||
421 | if (min_uV < 1000000) | |
422 | vsel = 0; | |
423 | else if (min_uV < 1700000) | |
424 | vsel = ((min_uV - 1000000) / 50000); | |
425 | else | |
426 | vsel = ((min_uV - 1700000) / 100000) | |
427 | + WM831X_ALDO_SELECTOR_LOW + 1; | |
428 | ||
429 | ret = wm831x_aldo_list_voltage(rdev, vsel); | |
430 | if (ret < 0) | |
431 | return ret; | |
432 | if (ret < min_uV || ret > max_uV) | |
433 | return -EINVAL; | |
434 | ||
435 | return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel); | |
436 | } | |
437 | ||
438 | static int wm831x_aldo_set_voltage(struct regulator_dev *rdev, | |
439 | int min_uV, int max_uV) | |
440 | { | |
441 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
442 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
443 | ||
444 | return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV); | |
445 | } | |
446 | ||
447 | static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev, | |
448 | int uV) | |
449 | { | |
450 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
451 | int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; | |
452 | ||
453 | return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV); | |
454 | } | |
455 | ||
456 | static int wm831x_aldo_get_voltage(struct regulator_dev *rdev) | |
457 | { | |
458 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
459 | struct wm831x *wm831x = ldo->wm831x; | |
460 | int reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
461 | int ret; | |
462 | ||
463 | ret = wm831x_reg_read(wm831x, reg); | |
464 | if (ret < 0) | |
465 | return ret; | |
466 | ||
467 | ret &= WM831X_LDO7_ON_VSEL_MASK; | |
468 | ||
469 | return wm831x_aldo_list_voltage(rdev, ret); | |
470 | } | |
471 | ||
472 | static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev) | |
473 | { | |
474 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
475 | struct wm831x *wm831x = ldo->wm831x; | |
476 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
6f17c652 | 477 | int ret; |
d1c6b4fe MB |
478 | |
479 | ret = wm831x_reg_read(wm831x, on_reg); | |
480 | if (ret < 0) | |
481 | return 0; | |
482 | ||
483 | if (ret & WM831X_LDO7_ON_MODE) | |
484 | return REGULATOR_MODE_IDLE; | |
485 | else | |
486 | return REGULATOR_MODE_NORMAL; | |
487 | } | |
488 | ||
489 | static int wm831x_aldo_set_mode(struct regulator_dev *rdev, | |
490 | unsigned int mode) | |
491 | { | |
492 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
493 | struct wm831x *wm831x = ldo->wm831x; | |
494 | int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; | |
495 | int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; | |
496 | int ret; | |
497 | ||
498 | ||
499 | switch (mode) { | |
500 | case REGULATOR_MODE_NORMAL: | |
501 | ret = wm831x_set_bits(wm831x, on_reg, | |
502 | WM831X_LDO7_ON_MODE, 0); | |
503 | if (ret < 0) | |
504 | return ret; | |
505 | break; | |
506 | ||
507 | case REGULATOR_MODE_IDLE: | |
508 | ret = wm831x_set_bits(wm831x, ctrl_reg, | |
509 | WM831X_LDO7_ON_MODE, | |
510 | WM831X_LDO7_ON_MODE); | |
511 | if (ret < 0) | |
512 | return ret; | |
513 | break; | |
514 | ||
515 | default: | |
516 | return -EINVAL; | |
517 | } | |
518 | ||
519 | return 0; | |
520 | } | |
521 | ||
522 | static int wm831x_aldo_get_status(struct regulator_dev *rdev) | |
523 | { | |
524 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
525 | struct wm831x *wm831x = ldo->wm831x; | |
526 | int mask = 1 << rdev_get_id(rdev); | |
527 | int ret; | |
528 | ||
529 | /* Is the regulator on? */ | |
530 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
531 | if (ret < 0) | |
532 | return ret; | |
533 | if (!(ret & mask)) | |
534 | return REGULATOR_STATUS_OFF; | |
535 | ||
536 | /* Is it reporting under voltage? */ | |
537 | ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); | |
538 | if (ret & mask) | |
539 | return REGULATOR_STATUS_ERROR; | |
540 | ||
541 | ret = wm831x_aldo_get_mode(rdev); | |
542 | if (ret < 0) | |
543 | return ret; | |
544 | else | |
545 | return regulator_mode_to_status(ret); | |
546 | } | |
547 | ||
548 | static struct regulator_ops wm831x_aldo_ops = { | |
549 | .list_voltage = wm831x_aldo_list_voltage, | |
550 | .get_voltage = wm831x_aldo_get_voltage, | |
551 | .set_voltage = wm831x_aldo_set_voltage, | |
552 | .set_suspend_voltage = wm831x_aldo_set_suspend_voltage, | |
553 | .get_mode = wm831x_aldo_get_mode, | |
554 | .set_mode = wm831x_aldo_set_mode, | |
555 | .get_status = wm831x_aldo_get_status, | |
556 | ||
557 | .is_enabled = wm831x_ldo_is_enabled, | |
558 | .enable = wm831x_ldo_enable, | |
559 | .disable = wm831x_ldo_disable, | |
560 | }; | |
561 | ||
562 | static __devinit int wm831x_aldo_probe(struct platform_device *pdev) | |
563 | { | |
564 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
565 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
566 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); | |
567 | struct wm831x_ldo *ldo; | |
568 | struct resource *res; | |
569 | int ret, irq; | |
570 | ||
571 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
572 | ||
573 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
574 | return -ENODEV; | |
575 | ||
576 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
577 | if (ldo == NULL) { | |
578 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
579 | return -ENOMEM; | |
580 | } | |
581 | ||
582 | ldo->wm831x = wm831x; | |
583 | ||
584 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
585 | if (res == NULL) { | |
586 | dev_err(&pdev->dev, "No I/O resource\n"); | |
587 | ret = -EINVAL; | |
588 | goto err; | |
589 | } | |
590 | ldo->base = res->start; | |
591 | ||
592 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
593 | ldo->desc.name = ldo->name; | |
594 | ldo->desc.id = id; | |
595 | ldo->desc.type = REGULATOR_VOLTAGE; | |
596 | ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1; | |
597 | ldo->desc.ops = &wm831x_aldo_ops; | |
598 | ldo->desc.owner = THIS_MODULE; | |
599 | ||
600 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
601 | pdata->ldo[id], ldo); | |
602 | if (IS_ERR(ldo->regulator)) { | |
603 | ret = PTR_ERR(ldo->regulator); | |
604 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
605 | id + 1, ret); | |
606 | goto err; | |
607 | } | |
608 | ||
609 | irq = platform_get_irq_byname(pdev, "UV"); | |
610 | ret = wm831x_request_irq(wm831x, irq, wm831x_ldo_uv_irq, | |
611 | IRQF_TRIGGER_RISING, ldo->name, | |
612 | ldo); | |
613 | if (ret != 0) { | |
614 | dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", | |
615 | irq, ret); | |
616 | goto err_regulator; | |
617 | } | |
618 | ||
619 | platform_set_drvdata(pdev, ldo); | |
620 | ||
621 | return 0; | |
622 | ||
623 | err_regulator: | |
624 | regulator_unregister(ldo->regulator); | |
625 | err: | |
626 | kfree(ldo); | |
627 | return ret; | |
628 | } | |
629 | ||
630 | static __devexit int wm831x_aldo_remove(struct platform_device *pdev) | |
631 | { | |
632 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
633 | struct wm831x *wm831x = ldo->wm831x; | |
634 | ||
635 | wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), ldo); | |
636 | regulator_unregister(ldo->regulator); | |
637 | kfree(ldo); | |
638 | ||
639 | return 0; | |
640 | } | |
641 | ||
642 | static struct platform_driver wm831x_aldo_driver = { | |
643 | .probe = wm831x_aldo_probe, | |
644 | .remove = __devexit_p(wm831x_aldo_remove), | |
645 | .driver = { | |
646 | .name = "wm831x-aldo", | |
eb66d565 | 647 | .owner = THIS_MODULE, |
d1c6b4fe MB |
648 | }, |
649 | }; | |
650 | ||
651 | /* | |
652 | * Alive LDO | |
653 | */ | |
654 | ||
655 | #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf | |
656 | ||
657 | static int wm831x_alive_ldo_list_voltage(struct regulator_dev *rdev, | |
658 | unsigned int selector) | |
659 | { | |
660 | /* 0.8-1.55V in 50mV steps */ | |
661 | if (selector <= WM831X_ALIVE_LDO_MAX_SELECTOR) | |
662 | return 800000 + (selector * 50000); | |
663 | return -EINVAL; | |
664 | } | |
665 | ||
666 | static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev, | |
667 | int reg, | |
668 | int min_uV, int max_uV) | |
669 | { | |
670 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
671 | struct wm831x *wm831x = ldo->wm831x; | |
672 | int vsel, ret; | |
673 | ||
674 | vsel = (min_uV - 800000) / 50000; | |
675 | ||
676 | ret = wm831x_alive_ldo_list_voltage(rdev, vsel); | |
677 | if (ret < 0) | |
678 | return ret; | |
679 | if (ret < min_uV || ret > max_uV) | |
680 | return -EINVAL; | |
681 | ||
682 | return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel); | |
683 | } | |
684 | ||
685 | static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev, | |
686 | int min_uV, int max_uV) | |
687 | { | |
688 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
689 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
690 | ||
691 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV); | |
692 | } | |
693 | ||
694 | static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev, | |
695 | int uV) | |
696 | { | |
697 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
698 | int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL; | |
699 | ||
700 | return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV); | |
701 | } | |
702 | ||
703 | static int wm831x_alive_ldo_get_voltage(struct regulator_dev *rdev) | |
704 | { | |
705 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
706 | struct wm831x *wm831x = ldo->wm831x; | |
707 | int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; | |
708 | int ret; | |
709 | ||
710 | ret = wm831x_reg_read(wm831x, reg); | |
711 | if (ret < 0) | |
712 | return ret; | |
713 | ||
714 | ret &= WM831X_LDO11_ON_VSEL_MASK; | |
715 | ||
716 | return wm831x_alive_ldo_list_voltage(rdev, ret); | |
717 | } | |
718 | ||
719 | static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev) | |
720 | { | |
721 | struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); | |
722 | struct wm831x *wm831x = ldo->wm831x; | |
723 | int mask = 1 << rdev_get_id(rdev); | |
724 | int ret; | |
725 | ||
726 | /* Is the regulator on? */ | |
727 | ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); | |
728 | if (ret < 0) | |
729 | return ret; | |
730 | if (ret & mask) | |
731 | return REGULATOR_STATUS_ON; | |
732 | else | |
733 | return REGULATOR_STATUS_OFF; | |
734 | } | |
735 | ||
736 | static struct regulator_ops wm831x_alive_ldo_ops = { | |
737 | .list_voltage = wm831x_alive_ldo_list_voltage, | |
738 | .get_voltage = wm831x_alive_ldo_get_voltage, | |
739 | .set_voltage = wm831x_alive_ldo_set_voltage, | |
740 | .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage, | |
741 | .get_status = wm831x_alive_ldo_get_status, | |
742 | ||
743 | .is_enabled = wm831x_ldo_is_enabled, | |
744 | .enable = wm831x_ldo_enable, | |
745 | .disable = wm831x_ldo_disable, | |
746 | }; | |
747 | ||
748 | static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev) | |
749 | { | |
750 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); | |
751 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; | |
752 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); | |
753 | struct wm831x_ldo *ldo; | |
754 | struct resource *res; | |
755 | int ret; | |
756 | ||
757 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
758 | ||
759 | if (pdata == NULL || pdata->ldo[id] == NULL) | |
760 | return -ENODEV; | |
761 | ||
762 | ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); | |
763 | if (ldo == NULL) { | |
764 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
765 | return -ENOMEM; | |
766 | } | |
767 | ||
768 | ldo->wm831x = wm831x; | |
769 | ||
770 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
771 | if (res == NULL) { | |
772 | dev_err(&pdev->dev, "No I/O resource\n"); | |
773 | ret = -EINVAL; | |
774 | goto err; | |
775 | } | |
776 | ldo->base = res->start; | |
777 | ||
778 | snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); | |
779 | ldo->desc.name = ldo->name; | |
780 | ldo->desc.id = id; | |
781 | ldo->desc.type = REGULATOR_VOLTAGE; | |
782 | ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1; | |
783 | ldo->desc.ops = &wm831x_alive_ldo_ops; | |
784 | ldo->desc.owner = THIS_MODULE; | |
785 | ||
786 | ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, | |
787 | pdata->ldo[id], ldo); | |
788 | if (IS_ERR(ldo->regulator)) { | |
789 | ret = PTR_ERR(ldo->regulator); | |
790 | dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", | |
791 | id + 1, ret); | |
792 | goto err; | |
793 | } | |
794 | ||
795 | platform_set_drvdata(pdev, ldo); | |
796 | ||
797 | return 0; | |
798 | ||
799 | err: | |
800 | kfree(ldo); | |
801 | return ret; | |
802 | } | |
803 | ||
804 | static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev) | |
805 | { | |
806 | struct wm831x_ldo *ldo = platform_get_drvdata(pdev); | |
807 | ||
808 | regulator_unregister(ldo->regulator); | |
809 | kfree(ldo); | |
810 | ||
811 | return 0; | |
812 | } | |
813 | ||
814 | static struct platform_driver wm831x_alive_ldo_driver = { | |
815 | .probe = wm831x_alive_ldo_probe, | |
816 | .remove = __devexit_p(wm831x_alive_ldo_remove), | |
817 | .driver = { | |
818 | .name = "wm831x-alive-ldo", | |
eb66d565 | 819 | .owner = THIS_MODULE, |
d1c6b4fe MB |
820 | }, |
821 | }; | |
822 | ||
823 | static int __init wm831x_ldo_init(void) | |
824 | { | |
825 | int ret; | |
826 | ||
827 | ret = platform_driver_register(&wm831x_gp_ldo_driver); | |
828 | if (ret != 0) | |
829 | pr_err("Failed to register WM831x GP LDO driver: %d\n", ret); | |
830 | ||
831 | ret = platform_driver_register(&wm831x_aldo_driver); | |
832 | if (ret != 0) | |
833 | pr_err("Failed to register WM831x ALDO driver: %d\n", ret); | |
834 | ||
835 | ret = platform_driver_register(&wm831x_alive_ldo_driver); | |
836 | if (ret != 0) | |
837 | pr_err("Failed to register WM831x alive LDO driver: %d\n", | |
838 | ret); | |
839 | ||
840 | return 0; | |
841 | } | |
842 | subsys_initcall(wm831x_ldo_init); | |
843 | ||
844 | static void __exit wm831x_ldo_exit(void) | |
845 | { | |
846 | platform_driver_unregister(&wm831x_alive_ldo_driver); | |
847 | platform_driver_unregister(&wm831x_aldo_driver); | |
848 | platform_driver_unregister(&wm831x_gp_ldo_driver); | |
849 | } | |
850 | module_exit(wm831x_ldo_exit); | |
851 | ||
852 | /* Module information */ | |
853 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
854 | MODULE_DESCRIPTION("WM831x LDO driver"); | |
855 | MODULE_LICENSE("GPL"); | |
856 | MODULE_ALIAS("platform:wm831x-ldo"); | |
857 | MODULE_ALIAS("platform:wm831x-aldo"); | |
858 | MODULE_ALIAS("platform:wm831x-aliveldo"); |