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ASoC: davinci: replace private sram api with genalloc
[linux-2.6.git] / drivers / regulator / wm831x-ldo.c
blobc2dc03993dc7011d5ce9c87726cea6f25579d8c3
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 #include <linux/slab.h>
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 9
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 char supply_name[WM831X_LDO_MAX_NAME];
40 struct regulator_desc desc;
41 int base;
42 struct wm831x *wm831x;
43 struct regulator_dev *regulator;
44 };
45
46 /*
47 * Shared
48 */
49
50 static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data)
51 {
52 struct wm831x_ldo *ldo = data;
53
54 regulator_notifier_call_chain(ldo->regulator,
55 REGULATOR_EVENT_UNDER_VOLTAGE,
56 NULL);
57
58 return IRQ_HANDLED;
59 }
60
61 /*
62 * General purpose LDOs
63 */
64
65 #define WM831X_GP_LDO_SELECTOR_LOW 0xe
66 #define WM831X_GP_LDO_MAX_SELECTOR 0x1f
67
68 static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev,
69 unsigned int selector)
70 {
71 /* 0.9-1.6V in 50mV steps */
72 if (selector <= WM831X_GP_LDO_SELECTOR_LOW)
73 return 900000 + (selector * 50000);
74 /* 1.7-3.3V in 100mV steps */
75 if (selector <= WM831X_GP_LDO_MAX_SELECTOR)
76 return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW)
77 * 100000);
78 return -EINVAL;
79 }
80
81 static int wm831x_gp_ldo_map_voltage(struct regulator_dev *rdev,
82 int min_uV, int max_uV)
83 {
84 int volt, vsel;
85
86 if (min_uV < 900000)
87 vsel = 0;
88 else if (min_uV < 1700000)
89 vsel = ((min_uV - 900000) / 50000);
90 else
91 vsel = ((min_uV - 1700000) / 100000)
92 + WM831X_GP_LDO_SELECTOR_LOW + 1;
93
94 volt = wm831x_gp_ldo_list_voltage(rdev, vsel);
95 if (volt < min_uV || volt > max_uV)
96 return -EINVAL;
97
98 return vsel;
99 }
100
101 static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev,
102 int uV)
103 {
104 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
105 struct wm831x *wm831x = ldo->wm831x;
106 int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
107
108 sel = wm831x_gp_ldo_map_voltage(rdev, uV, uV);
109 if (sel < 0)
110 return sel;
111
112 return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, sel);
113 }
114
115 static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev)
116 {
117 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
118 struct wm831x *wm831x = ldo->wm831x;
119 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
120 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
121 int ret;
122
123 ret = wm831x_reg_read(wm831x, on_reg);
124 if (ret < 0)
125 return ret;
126
127 if (!(ret & WM831X_LDO1_ON_MODE))
128 return REGULATOR_MODE_NORMAL;
129
130 ret = wm831x_reg_read(wm831x, ctrl_reg);
131 if (ret < 0)
132 return ret;
133
134 if (ret & WM831X_LDO1_LP_MODE)
135 return REGULATOR_MODE_STANDBY;
136 else
137 return REGULATOR_MODE_IDLE;
138 }
139
140 static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev,
141 unsigned int mode)
142 {
143 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
144 struct wm831x *wm831x = ldo->wm831x;
145 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
146 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
147 int ret;
148
149
150 switch (mode) {
151 case REGULATOR_MODE_NORMAL:
152 ret = wm831x_set_bits(wm831x, on_reg,
153 WM831X_LDO1_ON_MODE, 0);
154 if (ret < 0)
155 return ret;
156 break;
157
158 case REGULATOR_MODE_IDLE:
159 ret = wm831x_set_bits(wm831x, ctrl_reg,
160 WM831X_LDO1_LP_MODE, 0);
161 if (ret < 0)
162 return ret;
163
164 ret = wm831x_set_bits(wm831x, on_reg,
165 WM831X_LDO1_ON_MODE,
166 WM831X_LDO1_ON_MODE);
167 if (ret < 0)
168 return ret;
169 break;
170
171 case REGULATOR_MODE_STANDBY:
172 ret = wm831x_set_bits(wm831x, ctrl_reg,
173 WM831X_LDO1_LP_MODE,
174 WM831X_LDO1_LP_MODE);
175 if (ret < 0)
176 return ret;
177
178 ret = wm831x_set_bits(wm831x, on_reg,
179 WM831X_LDO1_ON_MODE,
180 WM831X_LDO1_ON_MODE);
181 if (ret < 0)
182 return ret;
183 break;
184
185 default:
186 return -EINVAL;
187 }
188
189 return 0;
190 }
191
192 static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev)
193 {
194 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
195 struct wm831x *wm831x = ldo->wm831x;
196 int mask = 1 << rdev_get_id(rdev);
197 int ret;
198
199 /* Is the regulator on? */
200 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
201 if (ret < 0)
202 return ret;
203 if (!(ret & mask))
204 return REGULATOR_STATUS_OFF;
205
206 /* Is it reporting under voltage? */
207 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
208 if (ret < 0)
209 return ret;
210 if (ret & mask)
211 return REGULATOR_STATUS_ERROR;
212
213 ret = wm831x_gp_ldo_get_mode(rdev);
214 if (ret < 0)
215 return ret;
216 else
217 return regulator_mode_to_status(ret);
218 }
219
220 static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev,
221 int input_uV,
222 int output_uV, int load_uA)
223 {
224 if (load_uA < 20000)
225 return REGULATOR_MODE_STANDBY;
226 if (load_uA < 50000)
227 return REGULATOR_MODE_IDLE;
228 return REGULATOR_MODE_NORMAL;
229 }
230
231
232 static struct regulator_ops wm831x_gp_ldo_ops = {
233 .list_voltage = wm831x_gp_ldo_list_voltage,
234 .map_voltage = wm831x_gp_ldo_map_voltage,
235 .get_voltage_sel = regulator_get_voltage_sel_regmap,
236 .set_voltage_sel = regulator_set_voltage_sel_regmap,
237 .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage,
238 .get_mode = wm831x_gp_ldo_get_mode,
239 .set_mode = wm831x_gp_ldo_set_mode,
240 .get_status = wm831x_gp_ldo_get_status,
241 .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode,
242 .get_bypass = regulator_get_bypass_regmap,
243 .set_bypass = regulator_set_bypass_regmap,
244
245 .is_enabled = regulator_is_enabled_regmap,
246 .enable = regulator_enable_regmap,
247 .disable = regulator_disable_regmap,
248 };
249
250 static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev)
251 {
252 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
253 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
254 struct regulator_config config = { };
255 int id;
256 struct wm831x_ldo *ldo;
257 struct resource *res;
258 int ret, irq;
259
260 if (pdata && pdata->wm831x_num)
261 id = (pdata->wm831x_num * 10) + 1;
262 else
263 id = 0;
264 id = pdev->id - id;
265
266 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
267
268 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
269 if (ldo == NULL) {
270 dev_err(&pdev->dev, "Unable to allocate private data\n");
271 return -ENOMEM;
272 }
273
274 ldo->wm831x = wm831x;
275
276 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
277 if (res == NULL) {
278 dev_err(&pdev->dev, "No REG resource\n");
279 ret = -EINVAL;
280 goto err;
281 }
282 ldo->base = res->start;
283
284 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
285 ldo->desc.name = ldo->name;
286
287 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
288 "LDO%dVDD", id + 1);
289 ldo->desc.supply_name = ldo->supply_name;
290
291 ldo->desc.id = id;
292 ldo->desc.type = REGULATOR_VOLTAGE;
293 ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1;
294 ldo->desc.ops = &wm831x_gp_ldo_ops;
295 ldo->desc.owner = THIS_MODULE;
296 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
297 ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK;
298 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
299 ldo->desc.enable_mask = 1 << id;
300 ldo->desc.bypass_reg = ldo->base;
301 ldo->desc.bypass_mask = WM831X_LDO1_SWI;
302
303 config.dev = pdev->dev.parent;
304 if (pdata)
305 config.init_data = pdata->ldo[id];
306 config.driver_data = ldo;
307 config.regmap = wm831x->regmap;
308
309 ldo->regulator = regulator_register(&ldo->desc, &config);
310 if (IS_ERR(ldo->regulator)) {
311 ret = PTR_ERR(ldo->regulator);
312 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
313 id + 1, ret);
314 goto err;
315 }
316
317 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
318 ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq,
319 IRQF_TRIGGER_RISING, ldo->name,
320 ldo);
321 if (ret != 0) {
322 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
323 irq, ret);
324 goto err_regulator;
325 }
326
327 platform_set_drvdata(pdev, ldo);
328
329 return 0;
330
331 err_regulator:
332 regulator_unregister(ldo->regulator);
333 err:
334 return ret;
335 }
336
337 static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev)
338 {
339 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
340
341 platform_set_drvdata(pdev, NULL);
342
343 free_irq(wm831x_irq(ldo->wm831x,
344 platform_get_irq_byname(pdev, "UV")), ldo);
345 regulator_unregister(ldo->regulator);
346
347 return 0;
348 }
349
350 static struct platform_driver wm831x_gp_ldo_driver = {
351 .probe = wm831x_gp_ldo_probe,
352 .remove = __devexit_p(wm831x_gp_ldo_remove),
353 .driver = {
354 .name = "wm831x-ldo",
355 .owner = THIS_MODULE,
356 },
357 };
358
359 /*
360 * Analogue LDOs
361 */
362
363
364 #define WM831X_ALDO_SELECTOR_LOW 0xc
365 #define WM831X_ALDO_MAX_SELECTOR 0x1f
366
367 static int wm831x_aldo_list_voltage(struct regulator_dev *rdev,
368 unsigned int selector)
369 {
370 /* 1-1.6V in 50mV steps */
371 if (selector <= WM831X_ALDO_SELECTOR_LOW)
372 return 1000000 + (selector * 50000);
373 /* 1.7-3.5V in 100mV steps */
374 if (selector <= WM831X_ALDO_MAX_SELECTOR)
375 return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW)
376 * 100000);
377 return -EINVAL;
378 }
379
380 static int wm831x_aldo_map_voltage(struct regulator_dev *rdev,
381 int min_uV, int max_uV)
382 {
383 int volt, vsel;
384
385 if (min_uV < 1000000)
386 vsel = 0;
387 else if (min_uV < 1700000)
388 vsel = ((min_uV - 1000000) / 50000);
389 else
390 vsel = ((min_uV - 1700000) / 100000)
391 + WM831X_ALDO_SELECTOR_LOW + 1;
392
393 volt = wm831x_aldo_list_voltage(rdev, vsel);
394 if (volt < min_uV || volt > max_uV)
395 return -EINVAL;
396
397 return vsel;
398
399 }
400
401 static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
402 int uV)
403 {
404 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
405 struct wm831x *wm831x = ldo->wm831x;
406 int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
407
408 sel = wm831x_aldo_map_voltage(rdev, uV, uV);
409 if (sel < 0)
410 return sel;
411
412 return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, sel);
413 }
414
415 static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev)
416 {
417 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
418 struct wm831x *wm831x = ldo->wm831x;
419 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
420 int ret;
421
422 ret = wm831x_reg_read(wm831x, on_reg);
423 if (ret < 0)
424 return 0;
425
426 if (ret & WM831X_LDO7_ON_MODE)
427 return REGULATOR_MODE_IDLE;
428 else
429 return REGULATOR_MODE_NORMAL;
430 }
431
432 static int wm831x_aldo_set_mode(struct regulator_dev *rdev,
433 unsigned int mode)
434 {
435 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
436 struct wm831x *wm831x = ldo->wm831x;
437 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
438 int ret;
439
440
441 switch (mode) {
442 case REGULATOR_MODE_NORMAL:
443 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0);
444 if (ret < 0)
445 return ret;
446 break;
447
448 case REGULATOR_MODE_IDLE:
449 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE,
450 WM831X_LDO7_ON_MODE);
451 if (ret < 0)
452 return ret;
453 break;
454
455 default:
456 return -EINVAL;
457 }
458
459 return 0;
460 }
461
462 static int wm831x_aldo_get_status(struct regulator_dev *rdev)
463 {
464 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
465 struct wm831x *wm831x = ldo->wm831x;
466 int mask = 1 << rdev_get_id(rdev);
467 int ret;
468
469 /* Is the regulator on? */
470 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
471 if (ret < 0)
472 return ret;
473 if (!(ret & mask))
474 return REGULATOR_STATUS_OFF;
475
476 /* Is it reporting under voltage? */
477 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
478 if (ret < 0)
479 return ret;
480 if (ret & mask)
481 return REGULATOR_STATUS_ERROR;
482
483 ret = wm831x_aldo_get_mode(rdev);
484 if (ret < 0)
485 return ret;
486 else
487 return regulator_mode_to_status(ret);
488 }
489
490 static struct regulator_ops wm831x_aldo_ops = {
491 .list_voltage = wm831x_aldo_list_voltage,
492 .map_voltage = wm831x_aldo_map_voltage,
493 .get_voltage_sel = regulator_get_voltage_sel_regmap,
494 .set_voltage_sel = regulator_set_voltage_sel_regmap,
495 .set_suspend_voltage = wm831x_aldo_set_suspend_voltage,
496 .get_mode = wm831x_aldo_get_mode,
497 .set_mode = wm831x_aldo_set_mode,
498 .get_status = wm831x_aldo_get_status,
499 .set_bypass = regulator_set_bypass_regmap,
500 .get_bypass = regulator_get_bypass_regmap,
501
502 .is_enabled = regulator_is_enabled_regmap,
503 .enable = regulator_enable_regmap,
504 .disable = regulator_disable_regmap,
505 };
506
507 static __devinit int wm831x_aldo_probe(struct platform_device *pdev)
508 {
509 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
510 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
511 struct regulator_config config = { };
512 int id;
513 struct wm831x_ldo *ldo;
514 struct resource *res;
515 int ret, irq;
516
517 if (pdata && pdata->wm831x_num)
518 id = (pdata->wm831x_num * 10) + 1;
519 else
520 id = 0;
521 id = pdev->id - id;
522
523 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
524
525 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
526 if (ldo == NULL) {
527 dev_err(&pdev->dev, "Unable to allocate private data\n");
528 return -ENOMEM;
529 }
530
531 ldo->wm831x = wm831x;
532
533 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
534 if (res == NULL) {
535 dev_err(&pdev->dev, "No REG resource\n");
536 ret = -EINVAL;
537 goto err;
538 }
539 ldo->base = res->start;
540
541 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
542 ldo->desc.name = ldo->name;
543
544 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
545 "LDO%dVDD", id + 1);
546 ldo->desc.supply_name = ldo->supply_name;
547
548 ldo->desc.id = id;
549 ldo->desc.type = REGULATOR_VOLTAGE;
550 ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1;
551 ldo->desc.ops = &wm831x_aldo_ops;
552 ldo->desc.owner = THIS_MODULE;
553 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
554 ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK;
555 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
556 ldo->desc.enable_mask = 1 << id;
557 ldo->desc.bypass_reg = ldo->base;
558 ldo->desc.bypass_mask = WM831X_LDO7_SWI;
559
560 config.dev = pdev->dev.parent;
561 if (pdata)
562 config.init_data = pdata->ldo[id];
563 config.driver_data = ldo;
564 config.regmap = wm831x->regmap;
565
566 ldo->regulator = regulator_register(&ldo->desc, &config);
567 if (IS_ERR(ldo->regulator)) {
568 ret = PTR_ERR(ldo->regulator);
569 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
570 id + 1, ret);
571 goto err;
572 }
573
574 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
575 ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq,
576 IRQF_TRIGGER_RISING, ldo->name, ldo);
577 if (ret != 0) {
578 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
579 irq, ret);
580 goto err_regulator;
581 }
582
583 platform_set_drvdata(pdev, ldo);
584
585 return 0;
586
587 err_regulator:
588 regulator_unregister(ldo->regulator);
589 err:
590 return ret;
591 }
592
593 static __devexit int wm831x_aldo_remove(struct platform_device *pdev)
594 {
595 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
596
597 free_irq(wm831x_irq(ldo->wm831x, platform_get_irq_byname(pdev, "UV")),
598 ldo);
599 regulator_unregister(ldo->regulator);
600
601 return 0;
602 }
603
604 static struct platform_driver wm831x_aldo_driver = {
605 .probe = wm831x_aldo_probe,
606 .remove = __devexit_p(wm831x_aldo_remove),
607 .driver = {
608 .name = "wm831x-aldo",
609 .owner = THIS_MODULE,
610 },
611 };
612
613 /*
614 * Alive LDO
615 */
616
617 #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf
618
619 static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev,
620 int uV)
621 {
622 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
623 struct wm831x *wm831x = ldo->wm831x;
624 int sel, reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL;
625
626 sel = regulator_map_voltage_linear(rdev, uV, uV);
627 if (sel < 0)
628 return sel;
629
630 return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, sel);
631 }
632
633 static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev)
634 {
635 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
636 struct wm831x *wm831x = ldo->wm831x;
637 int mask = 1 << rdev_get_id(rdev);
638 int ret;
639
640 /* Is the regulator on? */
641 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
642 if (ret < 0)
643 return ret;
644 if (ret & mask)
645 return REGULATOR_STATUS_ON;
646 else
647 return REGULATOR_STATUS_OFF;
648 }
649
650 static struct regulator_ops wm831x_alive_ldo_ops = {
651 .list_voltage = regulator_list_voltage_linear,
652 .map_voltage = regulator_map_voltage_linear,
653 .get_voltage_sel = regulator_get_voltage_sel_regmap,
654 .set_voltage_sel = regulator_set_voltage_sel_regmap,
655 .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage,
656 .get_status = wm831x_alive_ldo_get_status,
657
658 .is_enabled = regulator_is_enabled_regmap,
659 .enable = regulator_enable_regmap,
660 .disable = regulator_disable_regmap,
661 };
662
663 static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev)
664 {
665 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
666 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
667 struct regulator_config config = { };
668 int id;
669 struct wm831x_ldo *ldo;
670 struct resource *res;
671 int ret;
672
673 if (pdata && pdata->wm831x_num)
674 id = (pdata->wm831x_num * 10) + 1;
675 else
676 id = 0;
677 id = pdev->id - id;
678
679
680 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
681
682 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
683 if (ldo == NULL) {
684 dev_err(&pdev->dev, "Unable to allocate private data\n");
685 return -ENOMEM;
686 }
687
688 ldo->wm831x = wm831x;
689
690 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
691 if (res == NULL) {
692 dev_err(&pdev->dev, "No REG resource\n");
693 ret = -EINVAL;
694 goto err;
695 }
696 ldo->base = res->start;
697
698 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
699 ldo->desc.name = ldo->name;
700
701 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
702 "LDO%dVDD", id + 1);
703 ldo->desc.supply_name = ldo->supply_name;
704
705 ldo->desc.id = id;
706 ldo->desc.type = REGULATOR_VOLTAGE;
707 ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1;
708 ldo->desc.ops = &wm831x_alive_ldo_ops;
709 ldo->desc.owner = THIS_MODULE;
710 ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
711 ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK;
712 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
713 ldo->desc.enable_mask = 1 << id;
714 ldo->desc.min_uV = 800000;
715 ldo->desc.uV_step = 50000;
716 ldo->desc.enable_time = 1000;
717
718 config.dev = pdev->dev.parent;
719 if (pdata)
720 config.init_data = pdata->ldo[id];
721 config.driver_data = ldo;
722 config.regmap = wm831x->regmap;
723
724 ldo->regulator = regulator_register(&ldo->desc, &config);
725 if (IS_ERR(ldo->regulator)) {
726 ret = PTR_ERR(ldo->regulator);
727 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
728 id + 1, ret);
729 goto err;
730 }
731
732 platform_set_drvdata(pdev, ldo);
733
734 return 0;
735
736 err:
737 return ret;
738 }
739
740 static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev)
741 {
742 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
743
744 regulator_unregister(ldo->regulator);
745
746 return 0;
747 }
748
749 static struct platform_driver wm831x_alive_ldo_driver = {
750 .probe = wm831x_alive_ldo_probe,
751 .remove = __devexit_p(wm831x_alive_ldo_remove),
752 .driver = {
753 .name = "wm831x-alive-ldo",
754 .owner = THIS_MODULE,
755 },
756 };
757
758 static int __init wm831x_ldo_init(void)
759 {
760 int ret;
761
762 ret = platform_driver_register(&wm831x_gp_ldo_driver);
763 if (ret != 0)
764 pr_err("Failed to register WM831x GP LDO driver: %d\n", ret);
765
766 ret = platform_driver_register(&wm831x_aldo_driver);
767 if (ret != 0)
768 pr_err("Failed to register WM831x ALDO driver: %d\n", ret);
769
770 ret = platform_driver_register(&wm831x_alive_ldo_driver);
771 if (ret != 0)
772 pr_err("Failed to register WM831x alive LDO driver: %d\n",
773 ret);
774
775 return 0;
776 }
777 subsys_initcall(wm831x_ldo_init);
778
779 static void __exit wm831x_ldo_exit(void)
780 {
781 platform_driver_unregister(&wm831x_alive_ldo_driver);
782 platform_driver_unregister(&wm831x_aldo_driver);
783 platform_driver_unregister(&wm831x_gp_ldo_driver);
784 }
785 module_exit(wm831x_ldo_exit);
786
787 /* Module information */
788 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
789 MODULE_DESCRIPTION("WM831x LDO driver");
790 MODULE_LICENSE("GPL");
791 MODULE_ALIAS("platform:wm831x-ldo");
792 MODULE_ALIAS("platform:wm831x-aldo");
793 MODULE_ALIAS("platform:wm831x-aliveldo");
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