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Linux 4.16.11
[linux/fpc-iii.git] / drivers / regulator / wm831x-ldo.c
blobe4a6f888484ece31171d83a1e3b0a7334fe10e27
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 static const struct regulator_linear_range wm831x_gp_ldo_ranges[] = {
66 REGULATOR_LINEAR_RANGE(900000, 0, 14, 50000),
67 REGULATOR_LINEAR_RANGE(1700000, 15, 31, 100000),
68 };
69
70 static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev,
71 int uV)
72 {
73 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
74 struct wm831x *wm831x = ldo->wm831x;
75 int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
76
77 sel = regulator_map_voltage_linear_range(rdev, uV, uV);
78 if (sel < 0)
79 return sel;
80
81 return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, sel);
82 }
83
84 static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev)
85 {
86 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
87 struct wm831x *wm831x = ldo->wm831x;
88 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
89 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
90 int ret;
91
92 ret = wm831x_reg_read(wm831x, on_reg);
93 if (ret < 0)
94 return ret;
95
96 if (!(ret & WM831X_LDO1_ON_MODE))
97 return REGULATOR_MODE_NORMAL;
98
99 ret = wm831x_reg_read(wm831x, ctrl_reg);
100 if (ret < 0)
101 return ret;
102
103 if (ret & WM831X_LDO1_LP_MODE)
104 return REGULATOR_MODE_STANDBY;
105 else
106 return REGULATOR_MODE_IDLE;
107 }
108
109 static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev,
110 unsigned int mode)
111 {
112 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
113 struct wm831x *wm831x = ldo->wm831x;
114 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
115 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
116 int ret;
117
118
119 switch (mode) {
120 case REGULATOR_MODE_NORMAL:
121 ret = wm831x_set_bits(wm831x, on_reg,
122 WM831X_LDO1_ON_MODE, 0);
123 if (ret < 0)
124 return ret;
125 break;
126
127 case REGULATOR_MODE_IDLE:
128 ret = wm831x_set_bits(wm831x, ctrl_reg,
129 WM831X_LDO1_LP_MODE, 0);
130 if (ret < 0)
131 return ret;
132
133 ret = wm831x_set_bits(wm831x, on_reg,
134 WM831X_LDO1_ON_MODE,
135 WM831X_LDO1_ON_MODE);
136 if (ret < 0)
137 return ret;
138 break;
139
140 case REGULATOR_MODE_STANDBY:
141 ret = wm831x_set_bits(wm831x, ctrl_reg,
142 WM831X_LDO1_LP_MODE,
143 WM831X_LDO1_LP_MODE);
144 if (ret < 0)
145 return ret;
146
147 ret = wm831x_set_bits(wm831x, on_reg,
148 WM831X_LDO1_ON_MODE,
149 WM831X_LDO1_ON_MODE);
150 if (ret < 0)
151 return ret;
152 break;
153
154 default:
155 return -EINVAL;
156 }
157
158 return 0;
159 }
160
161 static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev)
162 {
163 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
164 struct wm831x *wm831x = ldo->wm831x;
165 int mask = 1 << rdev_get_id(rdev);
166 int ret;
167
168 /* Is the regulator on? */
169 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
170 if (ret < 0)
171 return ret;
172 if (!(ret & mask))
173 return REGULATOR_STATUS_OFF;
174
175 /* Is it reporting under voltage? */
176 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
177 if (ret < 0)
178 return ret;
179 if (ret & mask)
180 return REGULATOR_STATUS_ERROR;
181
182 ret = wm831x_gp_ldo_get_mode(rdev);
183 if (ret < 0)
184 return ret;
185 else
186 return regulator_mode_to_status(ret);
187 }
188
189 static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev,
190 int input_uV,
191 int output_uV, int load_uA)
192 {
193 if (load_uA < 20000)
194 return REGULATOR_MODE_STANDBY;
195 if (load_uA < 50000)
196 return REGULATOR_MODE_IDLE;
197 return REGULATOR_MODE_NORMAL;
198 }
199
200
201 static const struct regulator_ops wm831x_gp_ldo_ops = {
202 .list_voltage = regulator_list_voltage_linear_range,
203 .map_voltage = regulator_map_voltage_linear_range,
204 .get_voltage_sel = regulator_get_voltage_sel_regmap,
205 .set_voltage_sel = regulator_set_voltage_sel_regmap,
206 .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage,
207 .get_mode = wm831x_gp_ldo_get_mode,
208 .set_mode = wm831x_gp_ldo_set_mode,
209 .get_status = wm831x_gp_ldo_get_status,
210 .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode,
211 .get_bypass = regulator_get_bypass_regmap,
212 .set_bypass = regulator_set_bypass_regmap,
213
214 .is_enabled = regulator_is_enabled_regmap,
215 .enable = regulator_enable_regmap,
216 .disable = regulator_disable_regmap,
217 };
218
219 static int wm831x_gp_ldo_probe(struct platform_device *pdev)
220 {
221 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
222 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
223 struct regulator_config config = { };
224 int id;
225 struct wm831x_ldo *ldo;
226 struct resource *res;
227 int ret, irq;
228
229 if (pdata && pdata->wm831x_num)
230 id = (pdata->wm831x_num * 10) + 1;
231 else
232 id = 0;
233 id = pdev->id - id;
234
235 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
236
237 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
238 if (!ldo)
239 return -ENOMEM;
240
241 ldo->wm831x = wm831x;
242
243 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
244 if (res == NULL) {
245 dev_err(&pdev->dev, "No REG resource\n");
246 ret = -EINVAL;
247 goto err;
248 }
249 ldo->base = res->start;
250
251 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
252 ldo->desc.name = ldo->name;
253
254 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
255 "LDO%dVDD", id + 1);
256 ldo->desc.supply_name = ldo->supply_name;
257
258 ldo->desc.id = id;
259 ldo->desc.type = REGULATOR_VOLTAGE;
260 ldo->desc.n_voltages = 32;
261 ldo->desc.ops = &wm831x_gp_ldo_ops;
262 ldo->desc.owner = THIS_MODULE;
263 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
264 ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK;
265 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
266 ldo->desc.enable_mask = 1 << id;
267 ldo->desc.bypass_reg = ldo->base;
268 ldo->desc.bypass_mask = WM831X_LDO1_SWI;
269 ldo->desc.linear_ranges = wm831x_gp_ldo_ranges;
270 ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_gp_ldo_ranges);
271
272 config.dev = pdev->dev.parent;
273 if (pdata)
274 config.init_data = pdata->ldo[id];
275 config.driver_data = ldo;
276 config.regmap = wm831x->regmap;
277
278 ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc,
279 &config);
280 if (IS_ERR(ldo->regulator)) {
281 ret = PTR_ERR(ldo->regulator);
282 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
283 id + 1, ret);
284 goto err;
285 }
286
287 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
288 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
289 wm831x_ldo_uv_irq,
290 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
291 ldo->name,
292 ldo);
293 if (ret != 0) {
294 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
295 irq, ret);
296 goto err;
297 }
298
299 platform_set_drvdata(pdev, ldo);
300
301 return 0;
302
303 err:
304 return ret;
305 }
306
307 static struct platform_driver wm831x_gp_ldo_driver = {
308 .probe = wm831x_gp_ldo_probe,
309 .driver = {
310 .name = "wm831x-ldo",
311 },
312 };
313
314 /*
315 * Analogue LDOs
316 */
317
318 static const struct regulator_linear_range wm831x_aldo_ranges[] = {
319 REGULATOR_LINEAR_RANGE(1000000, 0, 12, 50000),
320 REGULATOR_LINEAR_RANGE(1700000, 13, 31, 100000),
321 };
322
323 static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
324 int uV)
325 {
326 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
327 struct wm831x *wm831x = ldo->wm831x;
328 int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
329
330 sel = regulator_map_voltage_linear_range(rdev, uV, uV);
331 if (sel < 0)
332 return sel;
333
334 return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, sel);
335 }
336
337 static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev)
338 {
339 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
340 struct wm831x *wm831x = ldo->wm831x;
341 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
342 int ret;
343
344 ret = wm831x_reg_read(wm831x, on_reg);
345 if (ret < 0)
346 return 0;
347
348 if (ret & WM831X_LDO7_ON_MODE)
349 return REGULATOR_MODE_IDLE;
350 else
351 return REGULATOR_MODE_NORMAL;
352 }
353
354 static int wm831x_aldo_set_mode(struct regulator_dev *rdev,
355 unsigned int mode)
356 {
357 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
358 struct wm831x *wm831x = ldo->wm831x;
359 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
360 int ret;
361
362
363 switch (mode) {
364 case REGULATOR_MODE_NORMAL:
365 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0);
366 if (ret < 0)
367 return ret;
368 break;
369
370 case REGULATOR_MODE_IDLE:
371 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE,
372 WM831X_LDO7_ON_MODE);
373 if (ret < 0)
374 return ret;
375 break;
376
377 default:
378 return -EINVAL;
379 }
380
381 return 0;
382 }
383
384 static int wm831x_aldo_get_status(struct regulator_dev *rdev)
385 {
386 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
387 struct wm831x *wm831x = ldo->wm831x;
388 int mask = 1 << rdev_get_id(rdev);
389 int ret;
390
391 /* Is the regulator on? */
392 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
393 if (ret < 0)
394 return ret;
395 if (!(ret & mask))
396 return REGULATOR_STATUS_OFF;
397
398 /* Is it reporting under voltage? */
399 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
400 if (ret < 0)
401 return ret;
402 if (ret & mask)
403 return REGULATOR_STATUS_ERROR;
404
405 ret = wm831x_aldo_get_mode(rdev);
406 if (ret < 0)
407 return ret;
408 else
409 return regulator_mode_to_status(ret);
410 }
411
412 static const struct regulator_ops wm831x_aldo_ops = {
413 .list_voltage = regulator_list_voltage_linear_range,
414 .map_voltage = regulator_map_voltage_linear_range,
415 .get_voltage_sel = regulator_get_voltage_sel_regmap,
416 .set_voltage_sel = regulator_set_voltage_sel_regmap,
417 .set_suspend_voltage = wm831x_aldo_set_suspend_voltage,
418 .get_mode = wm831x_aldo_get_mode,
419 .set_mode = wm831x_aldo_set_mode,
420 .get_status = wm831x_aldo_get_status,
421 .set_bypass = regulator_set_bypass_regmap,
422 .get_bypass = regulator_get_bypass_regmap,
423
424 .is_enabled = regulator_is_enabled_regmap,
425 .enable = regulator_enable_regmap,
426 .disable = regulator_disable_regmap,
427 };
428
429 static int wm831x_aldo_probe(struct platform_device *pdev)
430 {
431 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
432 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
433 struct regulator_config config = { };
434 int id;
435 struct wm831x_ldo *ldo;
436 struct resource *res;
437 int ret, irq;
438
439 if (pdata && pdata->wm831x_num)
440 id = (pdata->wm831x_num * 10) + 1;
441 else
442 id = 0;
443 id = pdev->id - id;
444
445 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
446
447 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
448 if (!ldo)
449 return -ENOMEM;
450
451 ldo->wm831x = wm831x;
452
453 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
454 if (res == NULL) {
455 dev_err(&pdev->dev, "No REG resource\n");
456 ret = -EINVAL;
457 goto err;
458 }
459 ldo->base = res->start;
460
461 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
462 ldo->desc.name = ldo->name;
463
464 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
465 "LDO%dVDD", id + 1);
466 ldo->desc.supply_name = ldo->supply_name;
467
468 ldo->desc.id = id;
469 ldo->desc.type = REGULATOR_VOLTAGE;
470 ldo->desc.n_voltages = 32;
471 ldo->desc.linear_ranges = wm831x_aldo_ranges;
472 ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_aldo_ranges);
473 ldo->desc.ops = &wm831x_aldo_ops;
474 ldo->desc.owner = THIS_MODULE;
475 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
476 ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK;
477 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
478 ldo->desc.enable_mask = 1 << id;
479 ldo->desc.bypass_reg = ldo->base;
480 ldo->desc.bypass_mask = WM831X_LDO7_SWI;
481
482 config.dev = pdev->dev.parent;
483 if (pdata)
484 config.init_data = pdata->ldo[id];
485 config.driver_data = ldo;
486 config.regmap = wm831x->regmap;
487
488 ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc,
489 &config);
490 if (IS_ERR(ldo->regulator)) {
491 ret = PTR_ERR(ldo->regulator);
492 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
493 id + 1, ret);
494 goto err;
495 }
496
497 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
498 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
499 wm831x_ldo_uv_irq,
500 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
501 ldo->name, ldo);
502 if (ret != 0) {
503 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
504 irq, ret);
505 goto err;
506 }
507
508 platform_set_drvdata(pdev, ldo);
509
510 return 0;
511
512 err:
513 return ret;
514 }
515
516 static struct platform_driver wm831x_aldo_driver = {
517 .probe = wm831x_aldo_probe,
518 .driver = {
519 .name = "wm831x-aldo",
520 },
521 };
522
523 /*
524 * Alive LDO
525 */
526
527 #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf
528
529 static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev,
530 int uV)
531 {
532 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
533 struct wm831x *wm831x = ldo->wm831x;
534 int sel, reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL;
535
536 sel = regulator_map_voltage_linear(rdev, uV, uV);
537 if (sel < 0)
538 return sel;
539
540 return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, sel);
541 }
542
543 static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev)
544 {
545 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
546 struct wm831x *wm831x = ldo->wm831x;
547 int mask = 1 << rdev_get_id(rdev);
548 int ret;
549
550 /* Is the regulator on? */
551 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
552 if (ret < 0)
553 return ret;
554 if (ret & mask)
555 return REGULATOR_STATUS_ON;
556 else
557 return REGULATOR_STATUS_OFF;
558 }
559
560 static const struct regulator_ops wm831x_alive_ldo_ops = {
561 .list_voltage = regulator_list_voltage_linear,
562 .map_voltage = regulator_map_voltage_linear,
563 .get_voltage_sel = regulator_get_voltage_sel_regmap,
564 .set_voltage_sel = regulator_set_voltage_sel_regmap,
565 .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage,
566 .get_status = wm831x_alive_ldo_get_status,
567
568 .is_enabled = regulator_is_enabled_regmap,
569 .enable = regulator_enable_regmap,
570 .disable = regulator_disable_regmap,
571 };
572
573 static int wm831x_alive_ldo_probe(struct platform_device *pdev)
574 {
575 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
576 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
577 struct regulator_config config = { };
578 int id;
579 struct wm831x_ldo *ldo;
580 struct resource *res;
581 int ret;
582
583 if (pdata && pdata->wm831x_num)
584 id = (pdata->wm831x_num * 10) + 1;
585 else
586 id = 0;
587 id = pdev->id - id;
588
589
590 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
591
592 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
593 if (!ldo)
594 return -ENOMEM;
595
596 ldo->wm831x = wm831x;
597
598 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
599 if (res == NULL) {
600 dev_err(&pdev->dev, "No REG resource\n");
601 ret = -EINVAL;
602 goto err;
603 }
604 ldo->base = res->start;
605
606 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
607 ldo->desc.name = ldo->name;
608
609 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
610 "LDO%dVDD", id + 1);
611 ldo->desc.supply_name = ldo->supply_name;
612
613 ldo->desc.id = id;
614 ldo->desc.type = REGULATOR_VOLTAGE;
615 ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1;
616 ldo->desc.ops = &wm831x_alive_ldo_ops;
617 ldo->desc.owner = THIS_MODULE;
618 ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
619 ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK;
620 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
621 ldo->desc.enable_mask = 1 << id;
622 ldo->desc.min_uV = 800000;
623 ldo->desc.uV_step = 50000;
624 ldo->desc.enable_time = 1000;
625
626 config.dev = pdev->dev.parent;
627 if (pdata)
628 config.init_data = pdata->ldo[id];
629 config.driver_data = ldo;
630 config.regmap = wm831x->regmap;
631
632 ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc,
633 &config);
634 if (IS_ERR(ldo->regulator)) {
635 ret = PTR_ERR(ldo->regulator);
636 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
637 id + 1, ret);
638 goto err;
639 }
640
641 platform_set_drvdata(pdev, ldo);
642
643 return 0;
644
645 err:
646 return ret;
647 }
648
649 static struct platform_driver wm831x_alive_ldo_driver = {
650 .probe = wm831x_alive_ldo_probe,
651 .driver = {
652 .name = "wm831x-alive-ldo",
653 },
654 };
655
656 static struct platform_driver * const drivers[] = {
657 &wm831x_gp_ldo_driver,
658 &wm831x_aldo_driver,
659 &wm831x_alive_ldo_driver,
660 };
661
662 static int __init wm831x_ldo_init(void)
663 {
664 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
665 }
666 subsys_initcall(wm831x_ldo_init);
667
668 static void __exit wm831x_ldo_exit(void)
669 {
670 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
671 }
672 module_exit(wm831x_ldo_exit);
673
674 /* Module information */
675 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
676 MODULE_DESCRIPTION("WM831x LDO driver");
677 MODULE_LICENSE("GPL");
678 MODULE_ALIAS("platform:wm831x-ldo");
679 MODULE_ALIAS("platform:wm831x-aldo");
680 MODULE_ALIAS("platform:wm831x-aliveldo");
Linux with added FPC-III support