2 * wm831x-ldo.c -- LDO driver for the WM831x series
4 * Copyright 2009 Wolfson Microelectronics PLC.
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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.
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>
24 #include <linux/mfd/wm831x/core.h>
25 #include <linux/mfd/wm831x/regulator.h>
26 #include <linux/mfd/wm831x/pdata.h>
28 #define WM831X_LDO_MAX_NAME 6
30 #define WM831X_LDO_CONTROL 0
31 #define WM831X_LDO_ON_CONTROL 1
32 #define WM831X_LDO_SLEEP_CONTROL 2
34 #define WM831X_ALIVE_LDO_ON_CONTROL 0
35 #define WM831X_ALIVE_LDO_SLEEP_CONTROL 1
38 char name[WM831X_LDO_MAX_NAME];
39 struct regulator_desc desc;
41 struct wm831x *wm831x;
42 struct regulator_dev *regulator;
49 static int wm831x_ldo_is_enabled(struct regulator_dev *rdev)
51 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
52 struct wm831x *wm831x = ldo->wm831x;
53 int mask = 1 << rdev_get_id(rdev);
56 reg = wm831x_reg_read(wm831x, WM831X_LDO_ENABLE);
66 static int wm831x_ldo_enable(struct regulator_dev *rdev)
68 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
69 struct wm831x *wm831x = ldo->wm831x;
70 int mask = 1 << rdev_get_id(rdev);
72 return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, mask);
75 static int wm831x_ldo_disable(struct regulator_dev *rdev)
77 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
78 struct wm831x *wm831x = ldo->wm831x;
79 int mask = 1 << rdev_get_id(rdev);
81 return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, 0);
84 static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data)
86 struct wm831x_ldo *ldo = data;
88 regulator_notifier_call_chain(ldo->regulator,
89 REGULATOR_EVENT_UNDER_VOLTAGE,
96 * General purpose LDOs
99 #define WM831X_GP_LDO_SELECTOR_LOW 0xe
100 #define WM831X_GP_LDO_MAX_SELECTOR 0x1f
102 static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev,
103 unsigned int selector)
105 /* 0.9-1.6V in 50mV steps */
106 if (selector <= WM831X_GP_LDO_SELECTOR_LOW)
107 return 900000 + (selector * 50000);
108 /* 1.7-3.3V in 50mV steps */
109 if (selector <= WM831X_GP_LDO_MAX_SELECTOR)
110 return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW)
115 static int wm831x_gp_ldo_set_voltage_int(struct regulator_dev *rdev, int reg,
116 int min_uV, int max_uV,
119 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
120 struct wm831x *wm831x = ldo->wm831x;
125 else if (min_uV < 1700000)
126 vsel = ((min_uV - 900000) / 50000);
128 vsel = ((min_uV - 1700000) / 100000)
129 + WM831X_GP_LDO_SELECTOR_LOW + 1;
131 ret = wm831x_gp_ldo_list_voltage(rdev, vsel);
134 if (ret < min_uV || ret > max_uV)
139 return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, vsel);
142 static int wm831x_gp_ldo_set_voltage(struct regulator_dev *rdev,
143 int min_uV, int max_uV,
146 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
147 int reg = ldo->base + WM831X_LDO_ON_CONTROL;
149 return wm831x_gp_ldo_set_voltage_int(rdev, reg, min_uV, max_uV,
153 static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev,
156 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
157 int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
158 unsigned int selector;
160 return wm831x_gp_ldo_set_voltage_int(rdev, reg, uV, uV, &selector);
163 static int wm831x_gp_ldo_get_voltage_sel(struct regulator_dev *rdev)
165 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
166 struct wm831x *wm831x = ldo->wm831x;
167 int reg = ldo->base + WM831X_LDO_ON_CONTROL;
170 ret = wm831x_reg_read(wm831x, reg);
174 ret &= WM831X_LDO1_ON_VSEL_MASK;
179 static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev)
181 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
182 struct wm831x *wm831x = ldo->wm831x;
183 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
184 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
187 ret = wm831x_reg_read(wm831x, on_reg);
191 if (!(ret & WM831X_LDO1_ON_MODE))
192 return REGULATOR_MODE_NORMAL;
194 ret = wm831x_reg_read(wm831x, ctrl_reg);
198 if (ret & WM831X_LDO1_LP_MODE)
199 return REGULATOR_MODE_STANDBY;
201 return REGULATOR_MODE_IDLE;
204 static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev,
207 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
208 struct wm831x *wm831x = ldo->wm831x;
209 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
210 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
215 case REGULATOR_MODE_NORMAL:
216 ret = wm831x_set_bits(wm831x, on_reg,
217 WM831X_LDO1_ON_MODE, 0);
222 case REGULATOR_MODE_IDLE:
223 ret = wm831x_set_bits(wm831x, ctrl_reg,
224 WM831X_LDO1_LP_MODE, 0);
228 ret = wm831x_set_bits(wm831x, on_reg,
230 WM831X_LDO1_ON_MODE);
235 case REGULATOR_MODE_STANDBY:
236 ret = wm831x_set_bits(wm831x, ctrl_reg,
238 WM831X_LDO1_LP_MODE);
242 ret = wm831x_set_bits(wm831x, on_reg,
244 WM831X_LDO1_ON_MODE);
256 static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev)
258 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
259 struct wm831x *wm831x = ldo->wm831x;
260 int mask = 1 << rdev_get_id(rdev);
263 /* Is the regulator on? */
264 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
268 return REGULATOR_STATUS_OFF;
270 /* Is it reporting under voltage? */
271 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
273 return REGULATOR_STATUS_ERROR;
275 ret = wm831x_gp_ldo_get_mode(rdev);
279 return regulator_mode_to_status(ret);
282 static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev,
284 int output_uV, int load_uA)
287 return REGULATOR_MODE_STANDBY;
289 return REGULATOR_MODE_IDLE;
290 return REGULATOR_MODE_NORMAL;
294 static struct regulator_ops wm831x_gp_ldo_ops = {
295 .list_voltage = wm831x_gp_ldo_list_voltage,
296 .get_voltage_sel = wm831x_gp_ldo_get_voltage_sel,
297 .set_voltage = wm831x_gp_ldo_set_voltage,
298 .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage,
299 .get_mode = wm831x_gp_ldo_get_mode,
300 .set_mode = wm831x_gp_ldo_set_mode,
301 .get_status = wm831x_gp_ldo_get_status,
302 .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode,
304 .is_enabled = wm831x_ldo_is_enabled,
305 .enable = wm831x_ldo_enable,
306 .disable = wm831x_ldo_disable,
309 static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev)
311 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
312 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
314 struct wm831x_ldo *ldo;
315 struct resource *res;
318 if (pdata && pdata->wm831x_num)
319 id = (pdata->wm831x_num * 10) + 1;
324 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
326 if (pdata == NULL || pdata->ldo[id] == NULL)
329 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
331 dev_err(&pdev->dev, "Unable to allocate private data\n");
335 ldo->wm831x = wm831x;
337 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
339 dev_err(&pdev->dev, "No I/O resource\n");
343 ldo->base = res->start;
345 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
346 ldo->desc.name = ldo->name;
348 ldo->desc.type = REGULATOR_VOLTAGE;
349 ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1;
350 ldo->desc.ops = &wm831x_gp_ldo_ops;
351 ldo->desc.owner = THIS_MODULE;
353 ldo->regulator = regulator_register(&ldo->desc, &pdev->dev,
354 pdata->ldo[id], ldo, NULL);
355 if (IS_ERR(ldo->regulator)) {
356 ret = PTR_ERR(ldo->regulator);
357 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
362 irq = platform_get_irq_byname(pdev, "UV");
363 ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq,
364 IRQF_TRIGGER_RISING, ldo->name,
367 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
372 platform_set_drvdata(pdev, ldo);
377 regulator_unregister(ldo->regulator);
382 static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev)
384 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
386 platform_set_drvdata(pdev, NULL);
388 free_irq(platform_get_irq_byname(pdev, "UV"), ldo);
389 regulator_unregister(ldo->regulator);
394 static struct platform_driver wm831x_gp_ldo_driver = {
395 .probe = wm831x_gp_ldo_probe,
396 .remove = __devexit_p(wm831x_gp_ldo_remove),
398 .name = "wm831x-ldo",
399 .owner = THIS_MODULE,
408 #define WM831X_ALDO_SELECTOR_LOW 0xc
409 #define WM831X_ALDO_MAX_SELECTOR 0x1f
411 static int wm831x_aldo_list_voltage(struct regulator_dev *rdev,
412 unsigned int selector)
414 /* 1-1.6V in 50mV steps */
415 if (selector <= WM831X_ALDO_SELECTOR_LOW)
416 return 1000000 + (selector * 50000);
417 /* 1.7-3.5V in 50mV steps */
418 if (selector <= WM831X_ALDO_MAX_SELECTOR)
419 return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW)
424 static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg,
425 int min_uV, int max_uV,
428 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
429 struct wm831x *wm831x = ldo->wm831x;
432 if (min_uV < 1000000)
434 else if (min_uV < 1700000)
435 vsel = ((min_uV - 1000000) / 50000);
437 vsel = ((min_uV - 1700000) / 100000)
438 + WM831X_ALDO_SELECTOR_LOW + 1;
440 ret = wm831x_aldo_list_voltage(rdev, vsel);
443 if (ret < min_uV || ret > max_uV)
448 return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel);
451 static int wm831x_aldo_set_voltage(struct regulator_dev *rdev,
452 int min_uV, int max_uV, unsigned *selector)
454 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
455 int reg = ldo->base + WM831X_LDO_ON_CONTROL;
457 return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV,
461 static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
464 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
465 int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
466 unsigned int selector;
468 return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV, &selector);
471 static int wm831x_aldo_get_voltage_sel(struct regulator_dev *rdev)
473 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
474 struct wm831x *wm831x = ldo->wm831x;
475 int reg = ldo->base + WM831X_LDO_ON_CONTROL;
478 ret = wm831x_reg_read(wm831x, reg);
482 ret &= WM831X_LDO7_ON_VSEL_MASK;
487 static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev)
489 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
490 struct wm831x *wm831x = ldo->wm831x;
491 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
494 ret = wm831x_reg_read(wm831x, on_reg);
498 if (ret & WM831X_LDO7_ON_MODE)
499 return REGULATOR_MODE_IDLE;
501 return REGULATOR_MODE_NORMAL;
504 static int wm831x_aldo_set_mode(struct regulator_dev *rdev,
507 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
508 struct wm831x *wm831x = ldo->wm831x;
509 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
514 case REGULATOR_MODE_NORMAL:
515 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0);
520 case REGULATOR_MODE_IDLE:
521 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE,
522 WM831X_LDO7_ON_MODE);
534 static int wm831x_aldo_get_status(struct regulator_dev *rdev)
536 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
537 struct wm831x *wm831x = ldo->wm831x;
538 int mask = 1 << rdev_get_id(rdev);
541 /* Is the regulator on? */
542 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
546 return REGULATOR_STATUS_OFF;
548 /* Is it reporting under voltage? */
549 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
551 return REGULATOR_STATUS_ERROR;
553 ret = wm831x_aldo_get_mode(rdev);
557 return regulator_mode_to_status(ret);
560 static struct regulator_ops wm831x_aldo_ops = {
561 .list_voltage = wm831x_aldo_list_voltage,
562 .get_voltage_sel = wm831x_aldo_get_voltage_sel,
563 .set_voltage = wm831x_aldo_set_voltage,
564 .set_suspend_voltage = wm831x_aldo_set_suspend_voltage,
565 .get_mode = wm831x_aldo_get_mode,
566 .set_mode = wm831x_aldo_set_mode,
567 .get_status = wm831x_aldo_get_status,
569 .is_enabled = wm831x_ldo_is_enabled,
570 .enable = wm831x_ldo_enable,
571 .disable = wm831x_ldo_disable,
574 static __devinit int wm831x_aldo_probe(struct platform_device *pdev)
576 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
577 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
579 struct wm831x_ldo *ldo;
580 struct resource *res;
583 if (pdata && pdata->wm831x_num)
584 id = (pdata->wm831x_num * 10) + 1;
589 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
591 if (pdata == NULL || pdata->ldo[id] == NULL)
594 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
596 dev_err(&pdev->dev, "Unable to allocate private data\n");
600 ldo->wm831x = wm831x;
602 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
604 dev_err(&pdev->dev, "No I/O resource\n");
608 ldo->base = res->start;
610 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
611 ldo->desc.name = ldo->name;
613 ldo->desc.type = REGULATOR_VOLTAGE;
614 ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1;
615 ldo->desc.ops = &wm831x_aldo_ops;
616 ldo->desc.owner = THIS_MODULE;
618 ldo->regulator = regulator_register(&ldo->desc, &pdev->dev,
619 pdata->ldo[id], ldo, NULL);
620 if (IS_ERR(ldo->regulator)) {
621 ret = PTR_ERR(ldo->regulator);
622 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
627 irq = platform_get_irq_byname(pdev, "UV");
628 ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq,
629 IRQF_TRIGGER_RISING, ldo->name, ldo);
631 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
636 platform_set_drvdata(pdev, ldo);
641 regulator_unregister(ldo->regulator);
646 static __devexit int wm831x_aldo_remove(struct platform_device *pdev)
648 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
650 free_irq(platform_get_irq_byname(pdev, "UV"), ldo);
651 regulator_unregister(ldo->regulator);
656 static struct platform_driver wm831x_aldo_driver = {
657 .probe = wm831x_aldo_probe,
658 .remove = __devexit_p(wm831x_aldo_remove),
660 .name = "wm831x-aldo",
661 .owner = THIS_MODULE,
669 #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf
671 static int wm831x_alive_ldo_list_voltage(struct regulator_dev *rdev,
672 unsigned int selector)
674 /* 0.8-1.55V in 50mV steps */
675 if (selector <= WM831X_ALIVE_LDO_MAX_SELECTOR)
676 return 800000 + (selector * 50000);
680 static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev,
682 int min_uV, int max_uV,
685 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
686 struct wm831x *wm831x = ldo->wm831x;
689 vsel = (min_uV - 800000) / 50000;
691 ret = wm831x_alive_ldo_list_voltage(rdev, vsel);
694 if (ret < min_uV || ret > max_uV)
699 return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel);
702 static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev,
703 int min_uV, int max_uV,
706 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
707 int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
709 return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV,
713 static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev,
716 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
717 int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL;
720 return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV, &selector);
723 static int wm831x_alive_ldo_get_voltage_sel(struct regulator_dev *rdev)
725 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
726 struct wm831x *wm831x = ldo->wm831x;
727 int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
730 ret = wm831x_reg_read(wm831x, reg);
734 ret &= WM831X_LDO11_ON_VSEL_MASK;
739 static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev)
741 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
742 struct wm831x *wm831x = ldo->wm831x;
743 int mask = 1 << rdev_get_id(rdev);
746 /* Is the regulator on? */
747 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
751 return REGULATOR_STATUS_ON;
753 return REGULATOR_STATUS_OFF;
756 static struct regulator_ops wm831x_alive_ldo_ops = {
757 .list_voltage = wm831x_alive_ldo_list_voltage,
758 .get_voltage_sel = wm831x_alive_ldo_get_voltage_sel,
759 .set_voltage = wm831x_alive_ldo_set_voltage,
760 .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage,
761 .get_status = wm831x_alive_ldo_get_status,
763 .is_enabled = wm831x_ldo_is_enabled,
764 .enable = wm831x_ldo_enable,
765 .disable = wm831x_ldo_disable,
768 static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev)
770 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
771 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
773 struct wm831x_ldo *ldo;
774 struct resource *res;
777 if (pdata && pdata->wm831x_num)
778 id = (pdata->wm831x_num * 10) + 1;
784 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
786 if (pdata == NULL || pdata->ldo[id] == NULL)
789 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
791 dev_err(&pdev->dev, "Unable to allocate private data\n");
795 ldo->wm831x = wm831x;
797 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
799 dev_err(&pdev->dev, "No I/O resource\n");
803 ldo->base = res->start;
805 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
806 ldo->desc.name = ldo->name;
808 ldo->desc.type = REGULATOR_VOLTAGE;
809 ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1;
810 ldo->desc.ops = &wm831x_alive_ldo_ops;
811 ldo->desc.owner = THIS_MODULE;
813 ldo->regulator = regulator_register(&ldo->desc, &pdev->dev,
814 pdata->ldo[id], ldo, NULL);
815 if (IS_ERR(ldo->regulator)) {
816 ret = PTR_ERR(ldo->regulator);
817 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
822 platform_set_drvdata(pdev, ldo);
830 static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev)
832 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
834 regulator_unregister(ldo->regulator);
839 static struct platform_driver wm831x_alive_ldo_driver = {
840 .probe = wm831x_alive_ldo_probe,
841 .remove = __devexit_p(wm831x_alive_ldo_remove),
843 .name = "wm831x-alive-ldo",
844 .owner = THIS_MODULE,
848 static int __init wm831x_ldo_init(void)
852 ret = platform_driver_register(&wm831x_gp_ldo_driver);
854 pr_err("Failed to register WM831x GP LDO driver: %d\n", ret);
856 ret = platform_driver_register(&wm831x_aldo_driver);
858 pr_err("Failed to register WM831x ALDO driver: %d\n", ret);
860 ret = platform_driver_register(&wm831x_alive_ldo_driver);
862 pr_err("Failed to register WM831x alive LDO driver: %d\n",
867 subsys_initcall(wm831x_ldo_init);
869 static void __exit wm831x_ldo_exit(void)
871 platform_driver_unregister(&wm831x_alive_ldo_driver);
872 platform_driver_unregister(&wm831x_aldo_driver);
873 platform_driver_unregister(&wm831x_gp_ldo_driver);
875 module_exit(wm831x_ldo_exit);
877 /* Module information */
878 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
879 MODULE_DESCRIPTION("WM831x LDO driver");
880 MODULE_LICENSE("GPL");
881 MODULE_ALIAS("platform:wm831x-ldo");
882 MODULE_ALIAS("platform:wm831x-aldo");
883 MODULE_ALIAS("platform:wm831x-aliveldo");