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 9
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 char supply_name[WM831X_LDO_MAX_NAME];
40 struct regulator_desc desc;
42 struct wm831x *wm831x;
43 struct regulator_dev *regulator;
50 static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data)
52 struct wm831x_ldo *ldo = data;
54 regulator_notifier_call_chain(ldo->regulator,
55 REGULATOR_EVENT_UNDER_VOLTAGE,
62 * General purpose LDOs
65 #define WM831X_GP_LDO_SELECTOR_LOW 0xe
66 #define WM831X_GP_LDO_MAX_SELECTOR 0x1f
68 static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev,
69 unsigned int selector)
71 /* 0.9-1.6V in 50mV steps */
72 if (selector <= WM831X_GP_LDO_SELECTOR_LOW)
73 return 900000 + (selector * 50000);
74 /* 1.7-3.3V in 100mV steps */
75 if (selector <= WM831X_GP_LDO_MAX_SELECTOR)
76 return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW)
81 static int wm831x_gp_ldo_set_voltage_int(struct regulator_dev *rdev, int reg,
82 int min_uV, int max_uV,
85 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
86 struct wm831x *wm831x = ldo->wm831x;
91 else if (min_uV < 1700000)
92 vsel = ((min_uV - 900000) / 50000);
94 vsel = ((min_uV - 1700000) / 100000)
95 + WM831X_GP_LDO_SELECTOR_LOW + 1;
97 ret = wm831x_gp_ldo_list_voltage(rdev, vsel);
100 if (ret < min_uV || ret > max_uV)
105 return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, vsel);
108 static int wm831x_gp_ldo_set_voltage(struct regulator_dev *rdev,
109 int min_uV, int max_uV,
112 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
113 int reg = ldo->base + WM831X_LDO_ON_CONTROL;
115 return wm831x_gp_ldo_set_voltage_int(rdev, reg, min_uV, max_uV,
119 static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev,
122 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
123 int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
124 unsigned int selector;
126 return wm831x_gp_ldo_set_voltage_int(rdev, reg, uV, uV, &selector);
129 static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev)
131 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
132 struct wm831x *wm831x = ldo->wm831x;
133 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
134 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
137 ret = wm831x_reg_read(wm831x, on_reg);
141 if (!(ret & WM831X_LDO1_ON_MODE))
142 return REGULATOR_MODE_NORMAL;
144 ret = wm831x_reg_read(wm831x, ctrl_reg);
148 if (ret & WM831X_LDO1_LP_MODE)
149 return REGULATOR_MODE_STANDBY;
151 return REGULATOR_MODE_IDLE;
154 static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev,
157 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
158 struct wm831x *wm831x = ldo->wm831x;
159 int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
160 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
165 case REGULATOR_MODE_NORMAL:
166 ret = wm831x_set_bits(wm831x, on_reg,
167 WM831X_LDO1_ON_MODE, 0);
172 case REGULATOR_MODE_IDLE:
173 ret = wm831x_set_bits(wm831x, ctrl_reg,
174 WM831X_LDO1_LP_MODE, 0);
178 ret = wm831x_set_bits(wm831x, on_reg,
180 WM831X_LDO1_ON_MODE);
185 case REGULATOR_MODE_STANDBY:
186 ret = wm831x_set_bits(wm831x, ctrl_reg,
188 WM831X_LDO1_LP_MODE);
192 ret = wm831x_set_bits(wm831x, on_reg,
194 WM831X_LDO1_ON_MODE);
206 static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev)
208 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
209 struct wm831x *wm831x = ldo->wm831x;
210 int mask = 1 << rdev_get_id(rdev);
213 /* Is the regulator on? */
214 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
218 return REGULATOR_STATUS_OFF;
220 /* Is it reporting under voltage? */
221 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
223 return REGULATOR_STATUS_ERROR;
225 ret = wm831x_gp_ldo_get_mode(rdev);
229 return regulator_mode_to_status(ret);
232 static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev,
234 int output_uV, int load_uA)
237 return REGULATOR_MODE_STANDBY;
239 return REGULATOR_MODE_IDLE;
240 return REGULATOR_MODE_NORMAL;
244 static struct regulator_ops wm831x_gp_ldo_ops = {
245 .list_voltage = wm831x_gp_ldo_list_voltage,
246 .get_voltage_sel = regulator_get_voltage_sel_regmap,
247 .set_voltage = wm831x_gp_ldo_set_voltage,
248 .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage,
249 .get_mode = wm831x_gp_ldo_get_mode,
250 .set_mode = wm831x_gp_ldo_set_mode,
251 .get_status = wm831x_gp_ldo_get_status,
252 .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode,
254 .is_enabled = regulator_is_enabled_regmap,
255 .enable = regulator_enable_regmap,
256 .disable = regulator_disable_regmap,
259 static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev)
261 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
262 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
263 struct regulator_config config = { };
265 struct wm831x_ldo *ldo;
266 struct resource *res;
269 if (pdata && pdata->wm831x_num)
270 id = (pdata->wm831x_num * 10) + 1;
275 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
277 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
279 dev_err(&pdev->dev, "Unable to allocate private data\n");
283 ldo->wm831x = wm831x;
285 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
287 dev_err(&pdev->dev, "No I/O resource\n");
291 ldo->base = res->start;
293 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
294 ldo->desc.name = ldo->name;
296 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
298 ldo->desc.supply_name = ldo->supply_name;
301 ldo->desc.type = REGULATOR_VOLTAGE;
302 ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1;
303 ldo->desc.ops = &wm831x_gp_ldo_ops;
304 ldo->desc.owner = THIS_MODULE;
305 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
306 ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK;
307 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
308 ldo->desc.enable_mask = 1 << id;
310 config.dev = pdev->dev.parent;
312 config.init_data = pdata->ldo[id];
313 config.driver_data = ldo;
314 config.regmap = wm831x->regmap;
316 ldo->regulator = regulator_register(&ldo->desc, &config);
317 if (IS_ERR(ldo->regulator)) {
318 ret = PTR_ERR(ldo->regulator);
319 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
324 irq = platform_get_irq_byname(pdev, "UV");
325 ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq,
326 IRQF_TRIGGER_RISING, ldo->name,
329 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
334 platform_set_drvdata(pdev, ldo);
339 regulator_unregister(ldo->regulator);
344 static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev)
346 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
348 platform_set_drvdata(pdev, NULL);
350 free_irq(platform_get_irq_byname(pdev, "UV"), ldo);
351 regulator_unregister(ldo->regulator);
356 static struct platform_driver wm831x_gp_ldo_driver = {
357 .probe = wm831x_gp_ldo_probe,
358 .remove = __devexit_p(wm831x_gp_ldo_remove),
360 .name = "wm831x-ldo",
361 .owner = THIS_MODULE,
370 #define WM831X_ALDO_SELECTOR_LOW 0xc
371 #define WM831X_ALDO_MAX_SELECTOR 0x1f
373 static int wm831x_aldo_list_voltage(struct regulator_dev *rdev,
374 unsigned int selector)
376 /* 1-1.6V in 50mV steps */
377 if (selector <= WM831X_ALDO_SELECTOR_LOW)
378 return 1000000 + (selector * 50000);
379 /* 1.7-3.5V in 100mV steps */
380 if (selector <= WM831X_ALDO_MAX_SELECTOR)
381 return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW)
386 static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg,
387 int min_uV, int max_uV,
390 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
391 struct wm831x *wm831x = ldo->wm831x;
394 if (min_uV < 1000000)
396 else if (min_uV < 1700000)
397 vsel = ((min_uV - 1000000) / 50000);
399 vsel = ((min_uV - 1700000) / 100000)
400 + WM831X_ALDO_SELECTOR_LOW + 1;
402 ret = wm831x_aldo_list_voltage(rdev, vsel);
405 if (ret < min_uV || ret > max_uV)
410 return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel);
413 static int wm831x_aldo_set_voltage(struct regulator_dev *rdev,
414 int min_uV, int max_uV, unsigned *selector)
416 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
417 int reg = ldo->base + WM831X_LDO_ON_CONTROL;
419 return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV,
423 static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
426 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
427 int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
428 unsigned int selector;
430 return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV, &selector);
433 static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev)
435 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
436 struct wm831x *wm831x = ldo->wm831x;
437 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
440 ret = wm831x_reg_read(wm831x, on_reg);
444 if (ret & WM831X_LDO7_ON_MODE)
445 return REGULATOR_MODE_IDLE;
447 return REGULATOR_MODE_NORMAL;
450 static int wm831x_aldo_set_mode(struct regulator_dev *rdev,
453 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
454 struct wm831x *wm831x = ldo->wm831x;
455 int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
460 case REGULATOR_MODE_NORMAL:
461 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0);
466 case REGULATOR_MODE_IDLE:
467 ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE,
468 WM831X_LDO7_ON_MODE);
480 static int wm831x_aldo_get_status(struct regulator_dev *rdev)
482 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
483 struct wm831x *wm831x = ldo->wm831x;
484 int mask = 1 << rdev_get_id(rdev);
487 /* Is the regulator on? */
488 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
492 return REGULATOR_STATUS_OFF;
494 /* Is it reporting under voltage? */
495 ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
497 return REGULATOR_STATUS_ERROR;
499 ret = wm831x_aldo_get_mode(rdev);
503 return regulator_mode_to_status(ret);
506 static struct regulator_ops wm831x_aldo_ops = {
507 .list_voltage = wm831x_aldo_list_voltage,
508 .get_voltage_sel = regulator_get_voltage_sel_regmap,
509 .set_voltage = wm831x_aldo_set_voltage,
510 .set_suspend_voltage = wm831x_aldo_set_suspend_voltage,
511 .get_mode = wm831x_aldo_get_mode,
512 .set_mode = wm831x_aldo_set_mode,
513 .get_status = wm831x_aldo_get_status,
515 .is_enabled = regulator_is_enabled_regmap,
516 .enable = regulator_enable_regmap,
517 .disable = regulator_disable_regmap,
520 static __devinit int wm831x_aldo_probe(struct platform_device *pdev)
522 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
523 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
524 struct regulator_config config = { };
526 struct wm831x_ldo *ldo;
527 struct resource *res;
530 if (pdata && pdata->wm831x_num)
531 id = (pdata->wm831x_num * 10) + 1;
536 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
538 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
540 dev_err(&pdev->dev, "Unable to allocate private data\n");
544 ldo->wm831x = wm831x;
546 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
548 dev_err(&pdev->dev, "No I/O resource\n");
552 ldo->base = res->start;
554 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
555 ldo->desc.name = ldo->name;
557 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
559 ldo->desc.supply_name = ldo->supply_name;
562 ldo->desc.type = REGULATOR_VOLTAGE;
563 ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1;
564 ldo->desc.ops = &wm831x_aldo_ops;
565 ldo->desc.owner = THIS_MODULE;
566 ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
567 ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK;
568 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
569 ldo->desc.enable_mask = 1 << id;
571 config.dev = pdev->dev.parent;
573 config.init_data = pdata->ldo[id];
574 config.driver_data = ldo;
575 config.regmap = wm831x->regmap;
577 ldo->regulator = regulator_register(&ldo->desc, &config);
578 if (IS_ERR(ldo->regulator)) {
579 ret = PTR_ERR(ldo->regulator);
580 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
585 irq = platform_get_irq_byname(pdev, "UV");
586 ret = request_threaded_irq(irq, NULL, wm831x_ldo_uv_irq,
587 IRQF_TRIGGER_RISING, ldo->name, ldo);
589 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
594 platform_set_drvdata(pdev, ldo);
599 regulator_unregister(ldo->regulator);
604 static __devexit int wm831x_aldo_remove(struct platform_device *pdev)
606 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
608 free_irq(platform_get_irq_byname(pdev, "UV"), ldo);
609 regulator_unregister(ldo->regulator);
614 static struct platform_driver wm831x_aldo_driver = {
615 .probe = wm831x_aldo_probe,
616 .remove = __devexit_p(wm831x_aldo_remove),
618 .name = "wm831x-aldo",
619 .owner = THIS_MODULE,
627 #define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf
629 static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev,
631 int min_uV, int max_uV,
634 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
635 struct wm831x *wm831x = ldo->wm831x;
638 vsel = (min_uV - 800000) / 50000;
640 ret = regulator_list_voltage_linear(rdev, vsel);
643 if (ret < min_uV || ret > max_uV)
648 return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel);
651 static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev,
652 int min_uV, int max_uV,
655 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
656 int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
658 return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV,
662 static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev,
665 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
666 int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL;
669 return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV, &selector);
672 static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev)
674 struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
675 struct wm831x *wm831x = ldo->wm831x;
676 int mask = 1 << rdev_get_id(rdev);
679 /* Is the regulator on? */
680 ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
684 return REGULATOR_STATUS_ON;
686 return REGULATOR_STATUS_OFF;
689 static struct regulator_ops wm831x_alive_ldo_ops = {
690 .list_voltage = regulator_list_voltage_linear,
691 .get_voltage_sel = regulator_get_voltage_sel_regmap,
692 .set_voltage = wm831x_alive_ldo_set_voltage,
693 .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage,
694 .get_status = wm831x_alive_ldo_get_status,
696 .is_enabled = regulator_is_enabled_regmap,
697 .enable = regulator_enable_regmap,
698 .disable = regulator_disable_regmap,
701 static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev)
703 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
704 struct wm831x_pdata *pdata = wm831x->dev->platform_data;
705 struct regulator_config config = { };
707 struct wm831x_ldo *ldo;
708 struct resource *res;
711 if (pdata && pdata->wm831x_num)
712 id = (pdata->wm831x_num * 10) + 1;
718 dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
720 ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
722 dev_err(&pdev->dev, "Unable to allocate private data\n");
726 ldo->wm831x = wm831x;
728 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
730 dev_err(&pdev->dev, "No I/O resource\n");
734 ldo->base = res->start;
736 snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
737 ldo->desc.name = ldo->name;
739 snprintf(ldo->supply_name, sizeof(ldo->supply_name),
741 ldo->desc.supply_name = ldo->supply_name;
744 ldo->desc.type = REGULATOR_VOLTAGE;
745 ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1;
746 ldo->desc.ops = &wm831x_alive_ldo_ops;
747 ldo->desc.owner = THIS_MODULE;
748 ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
749 ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK;
750 ldo->desc.enable_reg = WM831X_LDO_ENABLE;
751 ldo->desc.enable_mask = 1 << id;
752 ldo->desc.min_uV = 800000;
753 ldo->desc.uV_step = 50000;
755 config.dev = pdev->dev.parent;
757 config.init_data = pdata->ldo[id];
758 config.driver_data = ldo;
759 config.regmap = wm831x->regmap;
761 ldo->regulator = regulator_register(&ldo->desc, &config);
762 if (IS_ERR(ldo->regulator)) {
763 ret = PTR_ERR(ldo->regulator);
764 dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
769 platform_set_drvdata(pdev, ldo);
777 static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev)
779 struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
781 regulator_unregister(ldo->regulator);
786 static struct platform_driver wm831x_alive_ldo_driver = {
787 .probe = wm831x_alive_ldo_probe,
788 .remove = __devexit_p(wm831x_alive_ldo_remove),
790 .name = "wm831x-alive-ldo",
791 .owner = THIS_MODULE,
795 static int __init wm831x_ldo_init(void)
799 ret = platform_driver_register(&wm831x_gp_ldo_driver);
801 pr_err("Failed to register WM831x GP LDO driver: %d\n", ret);
803 ret = platform_driver_register(&wm831x_aldo_driver);
805 pr_err("Failed to register WM831x ALDO driver: %d\n", ret);
807 ret = platform_driver_register(&wm831x_alive_ldo_driver);
809 pr_err("Failed to register WM831x alive LDO driver: %d\n",
814 subsys_initcall(wm831x_ldo_init);
816 static void __exit wm831x_ldo_exit(void)
818 platform_driver_unregister(&wm831x_alive_ldo_driver);
819 platform_driver_unregister(&wm831x_aldo_driver);
820 platform_driver_unregister(&wm831x_gp_ldo_driver);
822 module_exit(wm831x_ldo_exit);
824 /* Module information */
825 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
826 MODULE_DESCRIPTION("WM831x LDO driver");
827 MODULE_LICENSE("GPL");
828 MODULE_ALIAS("platform:wm831x-ldo");
829 MODULE_ALIAS("platform:wm831x-aldo");
830 MODULE_ALIAS("platform:wm831x-aliveldo");