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
32 struct 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
wm831x_ldo_uv_irq(int irq,void * data)45 static 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
60 static 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
wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev * rdev,int uV)65 static 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
wm831x_gp_ldo_get_mode(struct regulator_dev * rdev)79 static 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
wm831x_gp_ldo_set_mode(struct regulator_dev * rdev,unsigned int mode)104 static 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
wm831x_gp_ldo_get_status(struct regulator_dev * rdev)156 static 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
wm831x_gp_ldo_get_optimum_mode(struct regulator_dev * rdev,int input_uV,int output_uV,int load_uA)184 static 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
196 static 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
wm831x_gp_ldo_probe(struct platform_device * pdev)214 static 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
298 err:
299 return ret;
300 }
301
302 static 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
313 static 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
wm831x_aldo_set_suspend_voltage(struct regulator_dev * rdev,int uV)318 static 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
wm831x_aldo_get_mode(struct regulator_dev * rdev)332 static 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
wm831x_aldo_set_mode(struct regulator_dev * rdev,unsigned int mode)349 static 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
wm831x_aldo_get_status(struct regulator_dev * rdev)379 static 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
407 static 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
wm831x_aldo_probe(struct platform_device * pdev)424 static 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
507 err:
508 return ret;
509 }
510
511 static 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
wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev * rdev,int uV)524 static 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
wm831x_alive_ldo_get_status(struct regulator_dev * rdev)538 static 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
555 static 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
wm831x_alive_ldo_probe(struct platform_device * pdev)568 static 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
640 err:
641 return ret;
642 }
643
644 static struct platform_driver wm831x_alive_ldo_driver = {
645 .probe = wm831x_alive_ldo_probe,
646 .driver = {
647 .name = "wm831x-alive-ldo",
648 },
649 };
650
651 static struct platform_driver * const drivers[] = {
652 &wm831x_gp_ldo_driver,
653 &wm831x_aldo_driver,
654 &wm831x_alive_ldo_driver,
655 };
656
wm831x_ldo_init(void)657 static int __init wm831x_ldo_init(void)
658 {
659 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
660 }
661 subsys_initcall(wm831x_ldo_init);
662
wm831x_ldo_exit(void)663 static void __exit wm831x_ldo_exit(void)
664 {
665 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
666 }
667 module_exit(wm831x_ldo_exit);
668
669 /* Module information */
670 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
671 MODULE_DESCRIPTION("WM831x LDO driver");
672 MODULE_LICENSE("GPL");
673 MODULE_ALIAS("platform:wm831x-ldo");
674 MODULE_ALIAS("platform:wm831x-aldo");
675 MODULE_ALIAS("platform:wm831x-aliveldo");
676