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 = kzalloc(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);
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);
383 static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev)
385 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
387 platform_set_drvdata(pdev, NULL);
389 free_irq(platform_get_irq_byname(pdev, "UV"), ldo);
390 regulator_unregister(ldo->regulator);
396 static struct platform_driver wm831x_gp_ldo_driver = {
397 .probe = wm831x_gp_ldo_probe,
398 .remove = __devexit_p(wm831x_gp_ldo_remove),
400 .name = "wm831x-ldo",
401 .owner = THIS_MODULE,
410 #define WM831X_ALDO_SELECTOR_LOW 0xc
411 #define WM831X_ALDO_MAX_SELECTOR 0x1f
413 static int wm831x_aldo_list_voltage(struct regulator_dev *rdev,
414 unsigned int selector)
416 /* 1-1.6V in 50mV steps */
417 if (selector <= WM831X_ALDO_SELECTOR_LOW)
418 return 1000000 + (selector * 50000);
419 /* 1.7-3.5V in 50mV steps */
420 if (selector <= WM831X_ALDO_MAX_SELECTOR)
421 return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW)
426 static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg,
427 int min_uV, int max_uV,
430 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
431 struct wm831x *wm831x = ldo->wm831x;
434 if (min_uV < 1000000)
436 else if (min_uV < 1700000)
437 vsel = ((min_uV - 1000000) / 50000);
439 vsel = ((min_uV - 1700000) / 100000)
440 + WM831X_ALDO_SELECTOR_LOW + 1;
442 ret = wm831x_aldo_list_voltage(rdev, vsel);
445 if (ret < min_uV || ret > max_uV)
450 return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel);
453 static int wm831x_aldo_set_voltage(struct regulator_dev *rdev,
454 int min_uV, int max_uV, unsigned *selector)
456 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
457 int reg = ldo->base + WM831X_LDO_ON_CONTROL;
459 return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV,
463 static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
466 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
467 int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
468 unsigned int selector;
470 return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV, &selector);
473 static int wm831x_aldo_get_voltage_sel(struct regulator_dev *rdev)
475 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
476 struct wm831x *wm831x = ldo->wm831x;
477 int reg = ldo->base + WM831X_LDO_ON_CONTROL;
480 ret = wm831x_reg_read(wm831x, reg);
484 ret &= WM831X_LDO7_ON_VSEL_MASK;
489 static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev)
491 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
492 struct wm831x *wm831x = ldo->wm831x;
493 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
496 ret = wm831x_reg_read(wm831x, on_reg);
500 if (ret & WM831X_LDO7_ON_MODE)
501 return REGULATOR_MODE_IDLE;
503 return REGULATOR_MODE_NORMAL;
506 static int wm831x_aldo_set_mode(struct regulator_dev *rdev,
509 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
510 struct wm831x *wm831x = ldo->wm831x;
511 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
512 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
517 case REGULATOR_MODE_NORMAL:
518 ret = wm831x_set_bits(wm831x, on_reg,
519 WM831X_LDO7_ON_MODE, 0);
524 case REGULATOR_MODE_IDLE:
525 ret = wm831x_set_bits(wm831x, ctrl_reg,
527 WM831X_LDO7_ON_MODE);
539 static int wm831x_aldo_get_status(struct regulator_dev *rdev)
541 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
542 struct wm831x *wm831x = ldo->wm831x;
543 int mask = 1 << rdev_get_id(rdev);
546 /* Is the regulator on? */
547 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
551 return REGULATOR_STATUS_OFF;
553 /* Is it reporting under voltage? */
554 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
556 return REGULATOR_STATUS_ERROR;
558 ret = wm831x_aldo_get_mode(rdev);
562 return regulator_mode_to_status(ret);
565 static struct regulator_ops wm831x_aldo_ops = {
566 .list_voltage = wm831x_aldo_list_voltage,
567 .get_voltage_sel = wm831x_aldo_get_voltage_sel,
568 .set_voltage = wm831x_aldo_set_voltage,
569 .set_suspend_voltage = wm831x_aldo_set_suspend_voltage,
570 .get_mode = wm831x_aldo_get_mode,
571 .set_mode = wm831x_aldo_set_mode,
572 .get_status = wm831x_aldo_get_status,
574 .is_enabled = wm831x_ldo_is_enabled,
575 .enable = wm831x_ldo_enable,
576 .disable = wm831x_ldo_disable,
579 static __devinit int wm831x_aldo_probe(struct platform_device *pdev)
581 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
582 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
584 struct wm831x_ldo *ldo;
585 struct resource *res;
588 if (pdata && pdata->wm831x_num)
589 id = (pdata->wm831x_num * 10) + 1;
594 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
596 if (pdata == NULL || pdata->ldo[id] == NULL)
599 ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL);
601 dev_err(&pdev->dev, "Unable to allocate private data\n");
605 ldo->wm831x = wm831x;
607 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
609 dev_err(&pdev->dev, "No I/O resource\n");
613 ldo->base = res->start;
615 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
616 ldo->desc.name = ldo->name;
618 ldo->desc.type = REGULATOR_VOLTAGE;
619 ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1;
620 ldo->desc.ops = &wm831x_aldo_ops;
621 ldo->desc.owner = THIS_MODULE;
623 ldo->regulator = regulator_register(&ldo->desc, &pdev->dev,
624 pdata->ldo[id], ldo);
625 if (IS_ERR(ldo->regulator)) {
626 ret = PTR_ERR(ldo->regulator);
627 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
632 irq = platform_get_irq_byname(pdev, "UV");
633 ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq,
634 IRQF_TRIGGER_RISING, ldo->name, ldo);
636 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
641 platform_set_drvdata(pdev, ldo);
646 regulator_unregister(ldo->regulator);
652 static __devexit int wm831x_aldo_remove(struct platform_device *pdev)
654 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
656 free_irq(platform_get_irq_byname(pdev, "UV"), ldo);
657 regulator_unregister(ldo->regulator);
663 static struct platform_driver wm831x_aldo_driver = {
664 .probe = wm831x_aldo_probe,
665 .remove = __devexit_p(wm831x_aldo_remove),
667 .name = "wm831x-aldo",
668 .owner = THIS_MODULE,
676 #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf
678 static int wm831x_alive_ldo_list_voltage(struct regulator_dev *rdev,
679 unsigned int selector)
681 /* 0.8-1.55V in 50mV steps */
682 if (selector <= WM831X_ALIVE_LDO_MAX_SELECTOR)
683 return 800000 + (selector * 50000);
687 static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev,
689 int min_uV, int max_uV,
692 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
693 struct wm831x *wm831x = ldo->wm831x;
696 vsel = (min_uV - 800000) / 50000;
698 ret = wm831x_alive_ldo_list_voltage(rdev, vsel);
701 if (ret < min_uV || ret > max_uV)
706 return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel);
709 static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev,
710 int min_uV, int max_uV,
713 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
714 int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
716 return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV,
720 static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev,
723 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
724 int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL;
727 return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV, &selector);
730 static int wm831x_alive_ldo_get_voltage_sel(struct regulator_dev *rdev)
732 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
733 struct wm831x *wm831x = ldo->wm831x;
734 int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
737 ret = wm831x_reg_read(wm831x, reg);
741 ret &= WM831X_LDO11_ON_VSEL_MASK;
746 static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev)
748 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
749 struct wm831x *wm831x = ldo->wm831x;
750 int mask = 1 << rdev_get_id(rdev);
753 /* Is the regulator on? */
754 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
758 return REGULATOR_STATUS_ON;
760 return REGULATOR_STATUS_OFF;
763 static struct regulator_ops wm831x_alive_ldo_ops = {
764 .list_voltage = wm831x_alive_ldo_list_voltage,
765 .get_voltage_sel = wm831x_alive_ldo_get_voltage_sel,
766 .set_voltage = wm831x_alive_ldo_set_voltage,
767 .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage,
768 .get_status = wm831x_alive_ldo_get_status,
770 .is_enabled = wm831x_ldo_is_enabled,
771 .enable = wm831x_ldo_enable,
772 .disable = wm831x_ldo_disable,
775 static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev)
777 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
778 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
780 struct wm831x_ldo *ldo;
781 struct resource *res;
784 if (pdata && pdata->wm831x_num)
785 id = (pdata->wm831x_num * 10) + 1;
791 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
793 if (pdata == NULL || pdata->ldo[id] == NULL)
796 ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL);
798 dev_err(&pdev->dev, "Unable to allocate private data\n");
802 ldo->wm831x = wm831x;
804 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
806 dev_err(&pdev->dev, "No I/O resource\n");
810 ldo->base = res->start;
812 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
813 ldo->desc.name = ldo->name;
815 ldo->desc.type = REGULATOR_VOLTAGE;
816 ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1;
817 ldo->desc.ops = &wm831x_alive_ldo_ops;
818 ldo->desc.owner = THIS_MODULE;
820 ldo->regulator = regulator_register(&ldo->desc, &pdev->dev,
821 pdata->ldo[id], ldo);
822 if (IS_ERR(ldo->regulator)) {
823 ret = PTR_ERR(ldo->regulator);
824 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
829 platform_set_drvdata(pdev, ldo);
838 static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev)
840 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
842 regulator_unregister(ldo->regulator);
848 static struct platform_driver wm831x_alive_ldo_driver = {
849 .probe = wm831x_alive_ldo_probe,
850 .remove = __devexit_p(wm831x_alive_ldo_remove),
852 .name = "wm831x-alive-ldo",
853 .owner = THIS_MODULE,
857 static int __init wm831x_ldo_init(void)
861 ret = platform_driver_register(&wm831x_gp_ldo_driver);
863 pr_err("Failed to register WM831x GP LDO driver: %d\n", ret);
865 ret = platform_driver_register(&wm831x_aldo_driver);
867 pr_err("Failed to register WM831x ALDO driver: %d\n", ret);
869 ret = platform_driver_register(&wm831x_alive_ldo_driver);
871 pr_err("Failed to register WM831x alive LDO driver: %d\n",
876 subsys_initcall(wm831x_ldo_init);
878 static void __exit wm831x_ldo_exit(void)
880 platform_driver_unregister(&wm831x_alive_ldo_driver);
881 platform_driver_unregister(&wm831x_aldo_driver);
882 platform_driver_unregister(&wm831x_gp_ldo_driver);
884 module_exit(wm831x_ldo_exit);
886 /* Module information */
887 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
888 MODULE_DESCRIPTION("WM831x LDO driver");
889 MODULE_LICENSE("GPL");
890 MODULE_ALIAS("platform:wm831x-ldo");
891 MODULE_ALIAS("platform:wm831x-aldo");
892 MODULE_ALIAS("platform:wm831x-aliveldo");