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1// SPDX-License-Identifier: GPL-2.0+
2//
3// wm831x-ldo.c -- LDO driver for the WM831x series
4//
5// Copyright 2009 Wolfson Microelectronics PLC.
6//
7// Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
8
9#include <linux/module.h>
10#include <linux/moduleparam.h>
11#include <linux/init.h>
12#include <linux/bitops.h>
13#include <linux/err.h>
14#include <linux/i2c.h>
15#include <linux/platform_device.h>
16#include <linux/regulator/driver.h>
17#include <linux/slab.h>
18
19#include <linux/mfd/wm831x/core.h>
20#include <linux/mfd/wm831x/regulator.h>
21#include <linux/mfd/wm831x/pdata.h>
22
23#define WM831X_LDO_MAX_NAME 9
24
25#define WM831X_LDO_CONTROL 0
26#define WM831X_LDO_ON_CONTROL 1
27#define WM831X_LDO_SLEEP_CONTROL 2
28
29#define WM831X_ALIVE_LDO_ON_CONTROL 0
30#define WM831X_ALIVE_LDO_SLEEP_CONTROL 1
31
32struct wm831x_ldo {
33 char name[WM831X_LDO_MAX_NAME];
34 char supply_name[WM831X_LDO_MAX_NAME];
35 struct regulator_desc desc;
36 int base;
37 struct wm831x *wm831x;
38 struct regulator_dev *regulator;
39};
40
41/*
42 * Shared
43 */
44
45static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data)
46{
47 struct wm831x_ldo *ldo = data;
48
49 regulator_notifier_call_chain(ldo->regulator,
50 REGULATOR_EVENT_UNDER_VOLTAGE,
51 NULL);
52
53 return IRQ_HANDLED;
54}
55
56/*
57 * General purpose LDOs
58 */
59
60static const struct linear_range wm831x_gp_ldo_ranges[] = {
61 REGULATOR_LINEAR_RANGE(900000, 0, 14, 50000),
62 REGULATOR_LINEAR_RANGE(1700000, 15, 31, 100000),
63};
64
65static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev,
66 int uV)
67{
68 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
69 struct wm831x *wm831x = ldo->wm831x;
70 int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
71
72 sel = regulator_map_voltage_linear_range(rdev, uV, uV);
73 if (sel < 0)
74 return sel;
75
76 return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, sel);
77}
78
79static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev)
80{
81 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
82 struct wm831x *wm831x = ldo->wm831x;
83 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
84 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
85 int ret;
86
87 ret = wm831x_reg_read(wm831x, on_reg);
88 if (ret < 0)
89 return ret;
90
91 if (!(ret & WM831X_LDO1_ON_MODE))
92 return REGULATOR_MODE_NORMAL;
93
94 ret = wm831x_reg_read(wm831x, ctrl_reg);
95 if (ret < 0)
96 return ret;
97
98 if (ret & WM831X_LDO1_LP_MODE)
99 return REGULATOR_MODE_STANDBY;
100 else
101 return REGULATOR_MODE_IDLE;
102}
103
104static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev,
105 unsigned int mode)
106{
107 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
108 struct wm831x *wm831x = ldo->wm831x;
109 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
110 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
111 int ret;
112
113
114 switch (mode) {
115 case REGULATOR_MODE_NORMAL:
116 ret = wm831x_set_bits(wm831x, on_reg,
117 WM831X_LDO1_ON_MODE, 0);
118 if (ret < 0)
119 return ret;
120 break;
121
122 case REGULATOR_MODE_IDLE:
123 ret = wm831x_set_bits(wm831x, ctrl_reg,
124 WM831X_LDO1_LP_MODE, 0);
125 if (ret < 0)
126 return ret;
127
128 ret = wm831x_set_bits(wm831x, on_reg,
129 WM831X_LDO1_ON_MODE,
130 WM831X_LDO1_ON_MODE);
131 if (ret < 0)
132 return ret;
133 break;
134
135 case REGULATOR_MODE_STANDBY:
136 ret = wm831x_set_bits(wm831x, ctrl_reg,
137 WM831X_LDO1_LP_MODE,
138 WM831X_LDO1_LP_MODE);
139 if (ret < 0)
140 return ret;
141
142 ret = wm831x_set_bits(wm831x, on_reg,
143 WM831X_LDO1_ON_MODE,
144 WM831X_LDO1_ON_MODE);
145 if (ret < 0)
146 return ret;
147 break;
148
149 default:
150 return -EINVAL;
151 }
152
153 return 0;
154}
155
156static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev)
157{
158 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
159 struct wm831x *wm831x = ldo->wm831x;
160 int mask = 1 << rdev_get_id(rdev);
161 int ret;
162
163 /* Is the regulator on? */
164 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
165 if (ret < 0)
166 return ret;
167 if (!(ret & mask))
168 return REGULATOR_STATUS_OFF;
169
170 /* Is it reporting under voltage? */
171 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
172 if (ret < 0)
173 return ret;
174 if (ret & mask)
175 return REGULATOR_STATUS_ERROR;
176
177 ret = wm831x_gp_ldo_get_mode(rdev);
178 if (ret < 0)
179 return ret;
180 else
181 return regulator_mode_to_status(ret);
182}
183
184static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev,
185 int input_uV,
186 int output_uV, int load_uA)
187{
188 if (load_uA < 20000)
189 return REGULATOR_MODE_STANDBY;
190 if (load_uA < 50000)
191 return REGULATOR_MODE_IDLE;
192 return REGULATOR_MODE_NORMAL;
193}
194
195
196static const struct regulator_ops wm831x_gp_ldo_ops = {
197 .list_voltage = regulator_list_voltage_linear_range,
198 .map_voltage = regulator_map_voltage_linear_range,
199 .get_voltage_sel = regulator_get_voltage_sel_regmap,
200 .set_voltage_sel = regulator_set_voltage_sel_regmap,
201 .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage,
202 .get_mode = wm831x_gp_ldo_get_mode,
203 .set_mode = wm831x_gp_ldo_set_mode,
204 .get_status = wm831x_gp_ldo_get_status,
205 .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode,
206 .get_bypass = regulator_get_bypass_regmap,
207 .set_bypass = regulator_set_bypass_regmap,
208
209 .is_enabled = regulator_is_enabled_regmap,
210 .enable = regulator_enable_regmap,
211 .disable = regulator_disable_regmap,
212};
213
214static int wm831x_gp_ldo_probe(struct platform_device *pdev)
215{
216 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
217 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
218 struct regulator_config config = { };
219 int id;
220 struct wm831x_ldo *ldo;
221 struct resource *res;
222 int ret, irq;
223
224 if (pdata && pdata->wm831x_num)
225 id = (pdata->wm831x_num * 10) + 1;
226 else
227 id = 0;
228 id = pdev->id - id;
229
230 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
231
232 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
233 if (!ldo)
234 return -ENOMEM;
235
236 ldo->wm831x = wm831x;
237
238 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
239 if (res == NULL) {
240 dev_err(&pdev->dev, "No REG resource\n");
241 ret = -EINVAL;
242 goto err;
243 }
244 ldo->base = res->start;
245
246 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
247 ldo->desc.name = ldo->name;
248
249 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
250 "LDO%dVDD", id + 1);
251 ldo->desc.supply_name = ldo->supply_name;
252
253 ldo->desc.id = id;
254 ldo->desc.type = REGULATOR_VOLTAGE;
255 ldo->desc.n_voltages = 32;
256 ldo->desc.ops = &wm831x_gp_ldo_ops;
257 ldo->desc.owner = THIS_MODULE;
258 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
259 ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK;
260 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
261 ldo->desc.enable_mask = 1 << id;
262 ldo->desc.bypass_reg = ldo->base;
263 ldo->desc.bypass_mask = WM831X_LDO1_SWI;
264 ldo->desc.linear_ranges = wm831x_gp_ldo_ranges;
265 ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_gp_ldo_ranges);
266
267 config.dev = pdev->dev.parent;
268 if (pdata)
269 config.init_data = pdata->ldo[id];
270 config.driver_data = ldo;
271 config.regmap = wm831x->regmap;
272
273 ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc,
274 &config);
275 if (IS_ERR(ldo->regulator)) {
276 ret = PTR_ERR(ldo->regulator);
277 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
278 id + 1, ret);
279 goto err;
280 }
281
282 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
283 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
284 wm831x_ldo_uv_irq,
285 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
286 ldo->name,
287 ldo);
288 if (ret != 0) {
289 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
290 irq, ret);
291 goto err;
292 }
293
294 platform_set_drvdata(pdev, ldo);
295
296 return 0;
297
298err:
299 return ret;
300}
301
302static struct platform_driver wm831x_gp_ldo_driver = {
303 .probe = wm831x_gp_ldo_probe,
304 .driver = {
305 .name = "wm831x-ldo",
306 },
307};
308
309/*
310 * Analogue LDOs
311 */
312
313static const struct linear_range wm831x_aldo_ranges[] = {
314 REGULATOR_LINEAR_RANGE(1000000, 0, 12, 50000),
315 REGULATOR_LINEAR_RANGE(1700000, 13, 31, 100000),
316};
317
318static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
319 int uV)
320{
321 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
322 struct wm831x *wm831x = ldo->wm831x;
323 int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
324
325 sel = regulator_map_voltage_linear_range(rdev, uV, uV);
326 if (sel < 0)
327 return sel;
328
329 return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, sel);
330}
331
332static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev)
333{
334 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
335 struct wm831x *wm831x = ldo->wm831x;
336 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
337 int ret;
338
339 ret = wm831x_reg_read(wm831x, on_reg);
340 if (ret < 0)
341 return 0;
342
343 if (ret & WM831X_LDO7_ON_MODE)
344 return REGULATOR_MODE_IDLE;
345 else
346 return REGULATOR_MODE_NORMAL;
347}
348
349static int wm831x_aldo_set_mode(struct regulator_dev *rdev,
350 unsigned int mode)
351{
352 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
353 struct wm831x *wm831x = ldo->wm831x;
354 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
355 int ret;
356
357
358 switch (mode) {
359 case REGULATOR_MODE_NORMAL:
360 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0);
361 if (ret < 0)
362 return ret;
363 break;
364
365 case REGULATOR_MODE_IDLE:
366 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE,
367 WM831X_LDO7_ON_MODE);
368 if (ret < 0)
369 return ret;
370 break;
371
372 default:
373 return -EINVAL;
374 }
375
376 return 0;
377}
378
379static int wm831x_aldo_get_status(struct regulator_dev *rdev)
380{
381 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
382 struct wm831x *wm831x = ldo->wm831x;
383 int mask = 1 << rdev_get_id(rdev);
384 int ret;
385
386 /* Is the regulator on? */
387 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
388 if (ret < 0)
389 return ret;
390 if (!(ret & mask))
391 return REGULATOR_STATUS_OFF;
392
393 /* Is it reporting under voltage? */
394 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
395 if (ret < 0)
396 return ret;
397 if (ret & mask)
398 return REGULATOR_STATUS_ERROR;
399
400 ret = wm831x_aldo_get_mode(rdev);
401 if (ret < 0)
402 return ret;
403 else
404 return regulator_mode_to_status(ret);
405}
406
407static const struct regulator_ops wm831x_aldo_ops = {
408 .list_voltage = regulator_list_voltage_linear_range,
409 .map_voltage = regulator_map_voltage_linear_range,
410 .get_voltage_sel = regulator_get_voltage_sel_regmap,
411 .set_voltage_sel = regulator_set_voltage_sel_regmap,
412 .set_suspend_voltage = wm831x_aldo_set_suspend_voltage,
413 .get_mode = wm831x_aldo_get_mode,
414 .set_mode = wm831x_aldo_set_mode,
415 .get_status = wm831x_aldo_get_status,
416 .set_bypass = regulator_set_bypass_regmap,
417 .get_bypass = regulator_get_bypass_regmap,
418
419 .is_enabled = regulator_is_enabled_regmap,
420 .enable = regulator_enable_regmap,
421 .disable = regulator_disable_regmap,
422};
423
424static int wm831x_aldo_probe(struct platform_device *pdev)
425{
426 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
427 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
428 struct regulator_config config = { };
429 int id;
430 struct wm831x_ldo *ldo;
431 struct resource *res;
432 int ret, irq;
433
434 if (pdata && pdata->wm831x_num)
435 id = (pdata->wm831x_num * 10) + 1;
436 else
437 id = 0;
438 id = pdev->id - id;
439
440 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
441
442 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
443 if (!ldo)
444 return -ENOMEM;
445
446 ldo->wm831x = wm831x;
447
448 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
449 if (res == NULL) {
450 dev_err(&pdev->dev, "No REG resource\n");
451 ret = -EINVAL;
452 goto err;
453 }
454 ldo->base = res->start;
455
456 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
457 ldo->desc.name = ldo->name;
458
459 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
460 "LDO%dVDD", id + 1);
461 ldo->desc.supply_name = ldo->supply_name;
462
463 ldo->desc.id = id;
464 ldo->desc.type = REGULATOR_VOLTAGE;
465 ldo->desc.n_voltages = 32;
466 ldo->desc.linear_ranges = wm831x_aldo_ranges;
467 ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_aldo_ranges);
468 ldo->desc.ops = &wm831x_aldo_ops;
469 ldo->desc.owner = THIS_MODULE;
470 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
471 ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK;
472 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
473 ldo->desc.enable_mask = 1 << id;
474 ldo->desc.bypass_reg = ldo->base;
475 ldo->desc.bypass_mask = WM831X_LDO7_SWI;
476
477 config.dev = pdev->dev.parent;
478 if (pdata)
479 config.init_data = pdata->ldo[id];
480 config.driver_data = ldo;
481 config.regmap = wm831x->regmap;
482
483 ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc,
484 &config);
485 if (IS_ERR(ldo->regulator)) {
486 ret = PTR_ERR(ldo->regulator);
487 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
488 id + 1, ret);
489 goto err;
490 }
491
492 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
493 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
494 wm831x_ldo_uv_irq,
495 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
496 ldo->name, ldo);
497 if (ret != 0) {
498 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
499 irq, ret);
500 goto err;
501 }
502
503 platform_set_drvdata(pdev, ldo);
504
505 return 0;
506
507err:
508 return ret;
509}
510
511static struct platform_driver wm831x_aldo_driver = {
512 .probe = wm831x_aldo_probe,
513 .driver = {
514 .name = "wm831x-aldo",
515 },
516};
517
518/*
519 * Alive LDO
520 */
521
522#define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf
523
524static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev,
525 int uV)
526{
527 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
528 struct wm831x *wm831x = ldo->wm831x;
529 int sel, reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL;
530
531 sel = regulator_map_voltage_linear(rdev, uV, uV);
532 if (sel < 0)
533 return sel;
534
535 return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, sel);
536}
537
538static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev)
539{
540 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
541 struct wm831x *wm831x = ldo->wm831x;
542 int mask = 1 << rdev_get_id(rdev);
543 int ret;
544
545 /* Is the regulator on? */
546 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
547 if (ret < 0)
548 return ret;
549 if (ret & mask)
550 return REGULATOR_STATUS_ON;
551 else
552 return REGULATOR_STATUS_OFF;
553}
554
555static const struct regulator_ops wm831x_alive_ldo_ops = {
556 .list_voltage = regulator_list_voltage_linear,
557 .map_voltage = regulator_map_voltage_linear,
558 .get_voltage_sel = regulator_get_voltage_sel_regmap,
559 .set_voltage_sel = regulator_set_voltage_sel_regmap,
560 .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage,
561 .get_status = wm831x_alive_ldo_get_status,
562
563 .is_enabled = regulator_is_enabled_regmap,
564 .enable = regulator_enable_regmap,
565 .disable = regulator_disable_regmap,
566};
567
568static int wm831x_alive_ldo_probe(struct platform_device *pdev)
569{
570 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
571 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
572 struct regulator_config config = { };
573 int id;
574 struct wm831x_ldo *ldo;
575 struct resource *res;
576 int ret;
577
578 if (pdata && pdata->wm831x_num)
579 id = (pdata->wm831x_num * 10) + 1;
580 else
581 id = 0;
582 id = pdev->id - id;
583
584
585 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
586
587 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
588 if (!ldo)
589 return -ENOMEM;
590
591 ldo->wm831x = wm831x;
592
593 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
594 if (res == NULL) {
595 dev_err(&pdev->dev, "No REG resource\n");
596 ret = -EINVAL;
597 goto err;
598 }
599 ldo->base = res->start;
600
601 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
602 ldo->desc.name = ldo->name;
603
604 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
605 "LDO%dVDD", id + 1);
606 ldo->desc.supply_name = ldo->supply_name;
607
608 ldo->desc.id = id;
609 ldo->desc.type = REGULATOR_VOLTAGE;
610 ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1;
611 ldo->desc.ops = &wm831x_alive_ldo_ops;
612 ldo->desc.owner = THIS_MODULE;
613 ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
614 ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK;
615 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
616 ldo->desc.enable_mask = 1 << id;
617 ldo->desc.min_uV = 800000;
618 ldo->desc.uV_step = 50000;
619 ldo->desc.enable_time = 1000;
620
621 config.dev = pdev->dev.parent;
622 if (pdata)
623 config.init_data = pdata->ldo[id];
624 config.driver_data = ldo;
625 config.regmap = wm831x->regmap;
626
627 ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc,
628 &config);
629 if (IS_ERR(ldo->regulator)) {
630 ret = PTR_ERR(ldo->regulator);
631 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
632 id + 1, ret);
633 goto err;
634 }
635
636 platform_set_drvdata(pdev, ldo);
637
638 return 0;
639
640err:
641 return ret;
642}
643
644static struct platform_driver wm831x_alive_ldo_driver = {
645 .probe = wm831x_alive_ldo_probe,
646 .driver = {
647 .name = "wm831x-alive-ldo",
648 },
649};
650
651static struct platform_driver * const drivers[] = {
652 &wm831x_gp_ldo_driver,
653 &wm831x_aldo_driver,
654 &wm831x_alive_ldo_driver,
655};
656
657static int __init wm831x_ldo_init(void)
658{
659 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
660}
661subsys_initcall(wm831x_ldo_init);
662
663static void __exit wm831x_ldo_exit(void)
664{
665 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
666}
667module_exit(wm831x_ldo_exit);
668
669/* Module information */
670MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
671MODULE_DESCRIPTION("WM831x LDO driver");
672MODULE_LICENSE("GPL");
673MODULE_ALIAS("platform:wm831x-ldo");
674MODULE_ALIAS("platform:wm831x-aldo");
675MODULE_ALIAS("platform:wm831x-aliveldo");
1// SPDX-License-Identifier: GPL-2.0+
2//
3// wm831x-ldo.c -- LDO driver for the WM831x series
4//
5// Copyright 2009 Wolfson Microelectronics PLC.
6//
7// Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
8
9#include <linux/module.h>
10#include <linux/moduleparam.h>
11#include <linux/init.h>
12#include <linux/bitops.h>
13#include <linux/err.h>
14#include <linux/i2c.h>
15#include <linux/platform_device.h>
16#include <linux/regulator/driver.h>
17#include <linux/slab.h>
18
19#include <linux/mfd/wm831x/core.h>
20#include <linux/mfd/wm831x/regulator.h>
21#include <linux/mfd/wm831x/pdata.h>
22
23#define WM831X_LDO_MAX_NAME 9
24
25#define WM831X_LDO_CONTROL 0
26#define WM831X_LDO_ON_CONTROL 1
27#define WM831X_LDO_SLEEP_CONTROL 2
28
29#define WM831X_ALIVE_LDO_ON_CONTROL 0
30#define WM831X_ALIVE_LDO_SLEEP_CONTROL 1
31
32struct wm831x_ldo {
33 char name[WM831X_LDO_MAX_NAME];
34 char supply_name[WM831X_LDO_MAX_NAME];
35 struct regulator_desc desc;
36 int base;
37 struct wm831x *wm831x;
38 struct regulator_dev *regulator;
39};
40
41/*
42 * Shared
43 */
44
45static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data)
46{
47 struct wm831x_ldo *ldo = data;
48
49 regulator_notifier_call_chain(ldo->regulator,
50 REGULATOR_EVENT_UNDER_VOLTAGE,
51 NULL);
52
53 return IRQ_HANDLED;
54}
55
56/*
57 * General purpose LDOs
58 */
59
60static const struct linear_range wm831x_gp_ldo_ranges[] = {
61 REGULATOR_LINEAR_RANGE(900000, 0, 14, 50000),
62 REGULATOR_LINEAR_RANGE(1700000, 15, 31, 100000),
63};
64
65static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev,
66 int uV)
67{
68 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
69 struct wm831x *wm831x = ldo->wm831x;
70 int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
71
72 sel = regulator_map_voltage_linear_range(rdev, uV, uV);
73 if (sel < 0)
74 return sel;
75
76 return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, sel);
77}
78
79static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev)
80{
81 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
82 struct wm831x *wm831x = ldo->wm831x;
83 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
84 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
85 int ret;
86
87 ret = wm831x_reg_read(wm831x, on_reg);
88 if (ret < 0)
89 return ret;
90
91 if (!(ret & WM831X_LDO1_ON_MODE))
92 return REGULATOR_MODE_NORMAL;
93
94 ret = wm831x_reg_read(wm831x, ctrl_reg);
95 if (ret < 0)
96 return ret;
97
98 if (ret & WM831X_LDO1_LP_MODE)
99 return REGULATOR_MODE_STANDBY;
100 else
101 return REGULATOR_MODE_IDLE;
102}
103
104static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev,
105 unsigned int mode)
106{
107 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
108 struct wm831x *wm831x = ldo->wm831x;
109 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
110 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
111 int ret;
112
113
114 switch (mode) {
115 case REGULATOR_MODE_NORMAL:
116 ret = wm831x_set_bits(wm831x, on_reg,
117 WM831X_LDO1_ON_MODE, 0);
118 if (ret < 0)
119 return ret;
120 break;
121
122 case REGULATOR_MODE_IDLE:
123 ret = wm831x_set_bits(wm831x, ctrl_reg,
124 WM831X_LDO1_LP_MODE, 0);
125 if (ret < 0)
126 return ret;
127
128 ret = wm831x_set_bits(wm831x, on_reg,
129 WM831X_LDO1_ON_MODE,
130 WM831X_LDO1_ON_MODE);
131 if (ret < 0)
132 return ret;
133 break;
134
135 case REGULATOR_MODE_STANDBY:
136 ret = wm831x_set_bits(wm831x, ctrl_reg,
137 WM831X_LDO1_LP_MODE,
138 WM831X_LDO1_LP_MODE);
139 if (ret < 0)
140 return ret;
141
142 ret = wm831x_set_bits(wm831x, on_reg,
143 WM831X_LDO1_ON_MODE,
144 WM831X_LDO1_ON_MODE);
145 if (ret < 0)
146 return ret;
147 break;
148
149 default:
150 return -EINVAL;
151 }
152
153 return 0;
154}
155
156static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev)
157{
158 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
159 struct wm831x *wm831x = ldo->wm831x;
160 int mask = 1 << rdev_get_id(rdev);
161 int ret;
162
163 /* Is the regulator on? */
164 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
165 if (ret < 0)
166 return ret;
167 if (!(ret & mask))
168 return REGULATOR_STATUS_OFF;
169
170 /* Is it reporting under voltage? */
171 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
172 if (ret < 0)
173 return ret;
174 if (ret & mask)
175 return REGULATOR_STATUS_ERROR;
176
177 ret = wm831x_gp_ldo_get_mode(rdev);
178 if (ret < 0)
179 return ret;
180 else
181 return regulator_mode_to_status(ret);
182}
183
184static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev,
185 int input_uV,
186 int output_uV, int load_uA)
187{
188 if (load_uA < 20000)
189 return REGULATOR_MODE_STANDBY;
190 if (load_uA < 50000)
191 return REGULATOR_MODE_IDLE;
192 return REGULATOR_MODE_NORMAL;
193}
194
195
196static const struct regulator_ops wm831x_gp_ldo_ops = {
197 .list_voltage = regulator_list_voltage_linear_range,
198 .map_voltage = regulator_map_voltage_linear_range,
199 .get_voltage_sel = regulator_get_voltage_sel_regmap,
200 .set_voltage_sel = regulator_set_voltage_sel_regmap,
201 .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage,
202 .get_mode = wm831x_gp_ldo_get_mode,
203 .set_mode = wm831x_gp_ldo_set_mode,
204 .get_status = wm831x_gp_ldo_get_status,
205 .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode,
206 .get_bypass = regulator_get_bypass_regmap,
207 .set_bypass = regulator_set_bypass_regmap,
208
209 .is_enabled = regulator_is_enabled_regmap,
210 .enable = regulator_enable_regmap,
211 .disable = regulator_disable_regmap,
212};
213
214static int wm831x_gp_ldo_probe(struct platform_device *pdev)
215{
216 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
217 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
218 struct regulator_config config = { };
219 int id;
220 struct wm831x_ldo *ldo;
221 struct resource *res;
222 int ret, irq;
223
224 if (pdata && pdata->wm831x_num)
225 id = (pdata->wm831x_num * 10) + 1;
226 else
227 id = 0;
228 id = pdev->id - id;
229
230 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
231
232 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
233 if (!ldo)
234 return -ENOMEM;
235
236 ldo->wm831x = wm831x;
237
238 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
239 if (res == NULL) {
240 dev_err(&pdev->dev, "No REG resource\n");
241 ret = -EINVAL;
242 goto err;
243 }
244 ldo->base = res->start;
245
246 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
247 ldo->desc.name = ldo->name;
248
249 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
250 "LDO%dVDD", id + 1);
251 ldo->desc.supply_name = ldo->supply_name;
252
253 ldo->desc.id = id;
254 ldo->desc.type = REGULATOR_VOLTAGE;
255 ldo->desc.n_voltages = 32;
256 ldo->desc.ops = &wm831x_gp_ldo_ops;
257 ldo->desc.owner = THIS_MODULE;
258 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
259 ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK;
260 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
261 ldo->desc.enable_mask = 1 << id;
262 ldo->desc.bypass_reg = ldo->base;
263 ldo->desc.bypass_mask = WM831X_LDO1_SWI;
264 ldo->desc.linear_ranges = wm831x_gp_ldo_ranges;
265 ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_gp_ldo_ranges);
266
267 config.dev = pdev->dev.parent;
268 if (pdata)
269 config.init_data = pdata->ldo[id];
270 config.driver_data = ldo;
271 config.regmap = wm831x->regmap;
272
273 ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc,
274 &config);
275 if (IS_ERR(ldo->regulator)) {
276 ret = PTR_ERR(ldo->regulator);
277 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
278 id + 1, ret);
279 goto err;
280 }
281
282 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
283 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
284 wm831x_ldo_uv_irq,
285 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
286 ldo->name,
287 ldo);
288 if (ret != 0) {
289 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
290 irq, ret);
291 goto err;
292 }
293
294 platform_set_drvdata(pdev, ldo);
295
296 return 0;
297
298err:
299 return ret;
300}
301
302static struct platform_driver wm831x_gp_ldo_driver = {
303 .probe = wm831x_gp_ldo_probe,
304 .driver = {
305 .name = "wm831x-ldo",
306 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
307 },
308};
309
310/*
311 * Analogue LDOs
312 */
313
314static const struct linear_range wm831x_aldo_ranges[] = {
315 REGULATOR_LINEAR_RANGE(1000000, 0, 12, 50000),
316 REGULATOR_LINEAR_RANGE(1700000, 13, 31, 100000),
317};
318
319static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
320 int uV)
321{
322 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
323 struct wm831x *wm831x = ldo->wm831x;
324 int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
325
326 sel = regulator_map_voltage_linear_range(rdev, uV, uV);
327 if (sel < 0)
328 return sel;
329
330 return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, sel);
331}
332
333static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev)
334{
335 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
336 struct wm831x *wm831x = ldo->wm831x;
337 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
338 int ret;
339
340 ret = wm831x_reg_read(wm831x, on_reg);
341 if (ret < 0)
342 return 0;
343
344 if (ret & WM831X_LDO7_ON_MODE)
345 return REGULATOR_MODE_IDLE;
346 else
347 return REGULATOR_MODE_NORMAL;
348}
349
350static int wm831x_aldo_set_mode(struct regulator_dev *rdev,
351 unsigned int mode)
352{
353 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
354 struct wm831x *wm831x = ldo->wm831x;
355 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
356 int ret;
357
358
359 switch (mode) {
360 case REGULATOR_MODE_NORMAL:
361 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0);
362 if (ret < 0)
363 return ret;
364 break;
365
366 case REGULATOR_MODE_IDLE:
367 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE,
368 WM831X_LDO7_ON_MODE);
369 if (ret < 0)
370 return ret;
371 break;
372
373 default:
374 return -EINVAL;
375 }
376
377 return 0;
378}
379
380static int wm831x_aldo_get_status(struct regulator_dev *rdev)
381{
382 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
383 struct wm831x *wm831x = ldo->wm831x;
384 int mask = 1 << rdev_get_id(rdev);
385 int ret;
386
387 /* Is the regulator on? */
388 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
389 if (ret < 0)
390 return ret;
391 if (!(ret & mask))
392 return REGULATOR_STATUS_OFF;
393
394 /* Is it reporting under voltage? */
395 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
396 if (ret < 0)
397 return ret;
398 if (ret & mask)
399 return REGULATOR_STATUS_ERROR;
400
401 ret = wm831x_aldo_get_mode(rdev);
402 if (ret < 0)
403 return ret;
404 else
405 return regulator_mode_to_status(ret);
406}
407
408static const struct regulator_ops wm831x_aldo_ops = {
409 .list_voltage = regulator_list_voltage_linear_range,
410 .map_voltage = regulator_map_voltage_linear_range,
411 .get_voltage_sel = regulator_get_voltage_sel_regmap,
412 .set_voltage_sel = regulator_set_voltage_sel_regmap,
413 .set_suspend_voltage = wm831x_aldo_set_suspend_voltage,
414 .get_mode = wm831x_aldo_get_mode,
415 .set_mode = wm831x_aldo_set_mode,
416 .get_status = wm831x_aldo_get_status,
417 .set_bypass = regulator_set_bypass_regmap,
418 .get_bypass = regulator_get_bypass_regmap,
419
420 .is_enabled = regulator_is_enabled_regmap,
421 .enable = regulator_enable_regmap,
422 .disable = regulator_disable_regmap,
423};
424
425static int wm831x_aldo_probe(struct platform_device *pdev)
426{
427 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
428 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
429 struct regulator_config config = { };
430 int id;
431 struct wm831x_ldo *ldo;
432 struct resource *res;
433 int ret, irq;
434
435 if (pdata && pdata->wm831x_num)
436 id = (pdata->wm831x_num * 10) + 1;
437 else
438 id = 0;
439 id = pdev->id - id;
440
441 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
442
443 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
444 if (!ldo)
445 return -ENOMEM;
446
447 ldo->wm831x = wm831x;
448
449 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
450 if (res == NULL) {
451 dev_err(&pdev->dev, "No REG resource\n");
452 ret = -EINVAL;
453 goto err;
454 }
455 ldo->base = res->start;
456
457 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
458 ldo->desc.name = ldo->name;
459
460 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
461 "LDO%dVDD", id + 1);
462 ldo->desc.supply_name = ldo->supply_name;
463
464 ldo->desc.id = id;
465 ldo->desc.type = REGULATOR_VOLTAGE;
466 ldo->desc.n_voltages = 32;
467 ldo->desc.linear_ranges = wm831x_aldo_ranges;
468 ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_aldo_ranges);
469 ldo->desc.ops = &wm831x_aldo_ops;
470 ldo->desc.owner = THIS_MODULE;
471 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
472 ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK;
473 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
474 ldo->desc.enable_mask = 1 << id;
475 ldo->desc.bypass_reg = ldo->base;
476 ldo->desc.bypass_mask = WM831X_LDO7_SWI;
477
478 config.dev = pdev->dev.parent;
479 if (pdata)
480 config.init_data = pdata->ldo[id];
481 config.driver_data = ldo;
482 config.regmap = wm831x->regmap;
483
484 ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc,
485 &config);
486 if (IS_ERR(ldo->regulator)) {
487 ret = PTR_ERR(ldo->regulator);
488 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
489 id + 1, ret);
490 goto err;
491 }
492
493 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
494 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
495 wm831x_ldo_uv_irq,
496 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
497 ldo->name, ldo);
498 if (ret != 0) {
499 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
500 irq, ret);
501 goto err;
502 }
503
504 platform_set_drvdata(pdev, ldo);
505
506 return 0;
507
508err:
509 return ret;
510}
511
512static struct platform_driver wm831x_aldo_driver = {
513 .probe = wm831x_aldo_probe,
514 .driver = {
515 .name = "wm831x-aldo",
516 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
517 },
518};
519
520/*
521 * Alive LDO
522 */
523
524#define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf
525
526static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev,
527 int uV)
528{
529 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
530 struct wm831x *wm831x = ldo->wm831x;
531 int sel, reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL;
532
533 sel = regulator_map_voltage_linear(rdev, uV, uV);
534 if (sel < 0)
535 return sel;
536
537 return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, sel);
538}
539
540static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev)
541{
542 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
543 struct wm831x *wm831x = ldo->wm831x;
544 int mask = 1 << rdev_get_id(rdev);
545 int ret;
546
547 /* Is the regulator on? */
548 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
549 if (ret < 0)
550 return ret;
551 if (ret & mask)
552 return REGULATOR_STATUS_ON;
553 else
554 return REGULATOR_STATUS_OFF;
555}
556
557static const struct regulator_ops wm831x_alive_ldo_ops = {
558 .list_voltage = regulator_list_voltage_linear,
559 .map_voltage = regulator_map_voltage_linear,
560 .get_voltage_sel = regulator_get_voltage_sel_regmap,
561 .set_voltage_sel = regulator_set_voltage_sel_regmap,
562 .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage,
563 .get_status = wm831x_alive_ldo_get_status,
564
565 .is_enabled = regulator_is_enabled_regmap,
566 .enable = regulator_enable_regmap,
567 .disable = regulator_disable_regmap,
568};
569
570static int wm831x_alive_ldo_probe(struct platform_device *pdev)
571{
572 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
573 struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
574 struct regulator_config config = { };
575 int id;
576 struct wm831x_ldo *ldo;
577 struct resource *res;
578 int ret;
579
580 if (pdata && pdata->wm831x_num)
581 id = (pdata->wm831x_num * 10) + 1;
582 else
583 id = 0;
584 id = pdev->id - id;
585
586
587 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
588
589 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
590 if (!ldo)
591 return -ENOMEM;
592
593 ldo->wm831x = wm831x;
594
595 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
596 if (res == NULL) {
597 dev_err(&pdev->dev, "No REG resource\n");
598 ret = -EINVAL;
599 goto err;
600 }
601 ldo->base = res->start;
602
603 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
604 ldo->desc.name = ldo->name;
605
606 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
607 "LDO%dVDD", id + 1);
608 ldo->desc.supply_name = ldo->supply_name;
609
610 ldo->desc.id = id;
611 ldo->desc.type = REGULATOR_VOLTAGE;
612 ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1;
613 ldo->desc.ops = &wm831x_alive_ldo_ops;
614 ldo->desc.owner = THIS_MODULE;
615 ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
616 ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK;
617 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
618 ldo->desc.enable_mask = 1 << id;
619 ldo->desc.min_uV = 800000;
620 ldo->desc.uV_step = 50000;
621 ldo->desc.enable_time = 1000;
622
623 config.dev = pdev->dev.parent;
624 if (pdata)
625 config.init_data = pdata->ldo[id];
626 config.driver_data = ldo;
627 config.regmap = wm831x->regmap;
628
629 ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc,
630 &config);
631 if (IS_ERR(ldo->regulator)) {
632 ret = PTR_ERR(ldo->regulator);
633 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
634 id + 1, ret);
635 goto err;
636 }
637
638 platform_set_drvdata(pdev, ldo);
639
640 return 0;
641
642err:
643 return ret;
644}
645
646static struct platform_driver wm831x_alive_ldo_driver = {
647 .probe = wm831x_alive_ldo_probe,
648 .driver = {
649 .name = "wm831x-alive-ldo",
650 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
651 },
652};
653
654static struct platform_driver * const drivers[] = {
655 &wm831x_gp_ldo_driver,
656 &wm831x_aldo_driver,
657 &wm831x_alive_ldo_driver,
658};
659
660static int __init wm831x_ldo_init(void)
661{
662 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
663}
664subsys_initcall(wm831x_ldo_init);
665
666static void __exit wm831x_ldo_exit(void)
667{
668 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
669}
670module_exit(wm831x_ldo_exit);
671
672/* Module information */
673MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
674MODULE_DESCRIPTION("WM831x LDO driver");
675MODULE_LICENSE("GPL");
676MODULE_ALIAS("platform:wm831x-ldo");
677MODULE_ALIAS("platform:wm831x-aldo");
678MODULE_ALIAS("platform:wm831x-aliveldo");