[linux-2.6-block.git] / drivers / leds / leds-adp5520.c

/*
 * LEDs driver for Analog Devices ADP5520/ADP5501 MFD PMICs
 *
 * Copyright 2009 Analog Devices Inc.
 *
 * Loosely derived from leds-da903x:
 * Copyright (C) 2008 Compulab, Ltd.
 *	Mike Rapoport <mike@compulab.co.il>
 *
 * Copyright (C) 2006-2008 Marvell International Ltd.
 *	Eric Miao <eric.miao@marvell.com>
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/workqueue.h>
#include <linux/mfd/adp5520.h>
#include <linux/slab.h>

struct adp5520_led {
	struct led_classdev	cdev;
	struct work_struct	work;
	struct device		*master;
	enum led_brightness	new_brightness;
	int			id;
	int			flags;
};

static void adp5520_led_work(struct work_struct *work)
{
	struct adp5520_led *led = container_of(work, struct adp5520_led, work);
	adp5520_write(led->master, ADP5520_LED1_CURRENT + led->id - 1,
			 led->new_brightness >> 2);
}

static void adp5520_led_set(struct led_classdev *led_cdev,
			   enum led_brightness value)
{
	struct adp5520_led *led;

	led = container_of(led_cdev, struct adp5520_led, cdev);
	led->new_brightness = value;
	schedule_work(&led->work);
}

static int adp5520_led_setup(struct adp5520_led *led)
{
	struct device *dev = led->master;
	int flags = led->flags;
	int ret = 0;

	switch (led->id) {
	case FLAG_ID_ADP5520_LED1_ADP5501_LED0:
		ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
					(flags >> ADP5520_FLAG_OFFT_SHIFT) &
					ADP5520_FLAG_OFFT_MASK);
		ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
					ADP5520_LED1_EN);
		break;
	case FLAG_ID_ADP5520_LED2_ADP5501_LED1:
		ret |= adp5520_set_bits(dev,  ADP5520_LED_TIME,
					((flags >> ADP5520_FLAG_OFFT_SHIFT) &
					ADP5520_FLAG_OFFT_MASK) << 2);
		ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
					 ADP5520_R3_MODE);
		ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
					ADP5520_LED2_EN);
		break;
	case FLAG_ID_ADP5520_LED3_ADP5501_LED2:
		ret |= adp5520_set_bits(dev,  ADP5520_LED_TIME,
					((flags >> ADP5520_FLAG_OFFT_SHIFT) &
					ADP5520_FLAG_OFFT_MASK) << 4);
		ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
					ADP5520_C3_MODE);
		ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
					ADP5520_LED3_EN);
		break;
	}

	return ret;
}

static int adp5520_led_prepare(struct platform_device *pdev)
{
	struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
	struct device *dev = pdev->dev.parent;
	int ret = 0;

	ret |= adp5520_write(dev, ADP5520_LED1_CURRENT, 0);
	ret |= adp5520_write(dev, ADP5520_LED2_CURRENT, 0);
	ret |= adp5520_write(dev, ADP5520_LED3_CURRENT, 0);
	ret |= adp5520_write(dev, ADP5520_LED_TIME, pdata->led_on_time << 6);
	ret |= adp5520_write(dev, ADP5520_LED_FADE, FADE_VAL(pdata->fade_in,
		 pdata->fade_out));

	return ret;
}

static int adp5520_led_probe(struct platform_device *pdev)
{
	struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
	struct adp5520_led *led, *led_dat;
	struct led_info *cur_led;
	int ret, i;

	if (pdata == NULL) {
		dev_err(&pdev->dev, "missing platform data\n");
		return -ENODEV;
	}

	if (pdata->num_leds > ADP5520_01_MAXLEDS) {
		dev_err(&pdev->dev, "can't handle more than %d LEDS\n",
				 ADP5520_01_MAXLEDS);
		return -EFAULT;
	}

	led = devm_kzalloc(&pdev->dev, sizeof(*led) * pdata->num_leds,
				GFP_KERNEL);
	if (!led)
		return -ENOMEM;

	ret = adp5520_led_prepare(pdev);
	if (ret) {
		dev_err(&pdev->dev, "failed to write\n");
		return ret;
	}

	for (i = 0; i < pdata->num_leds; ++i) {
		cur_led = &pdata->leds[i];
		led_dat = &led[i];

		led_dat->cdev.name = cur_led->name;
		led_dat->cdev.default_trigger = cur_led->default_trigger;
		led_dat->cdev.brightness_set = adp5520_led_set;
		led_dat->cdev.brightness = LED_OFF;

		if (cur_led->flags & ADP5520_FLAG_LED_MASK)
			led_dat->flags = cur_led->flags;
		else
			led_dat->flags = i + 1;

		led_dat->id = led_dat->flags & ADP5520_FLAG_LED_MASK;

		led_dat->master = pdev->dev.parent;
		led_dat->new_brightness = LED_OFF;

		INIT_WORK(&led_dat->work, adp5520_led_work);

		ret = led_classdev_register(led_dat->master, &led_dat->cdev);
		if (ret) {
			dev_err(&pdev->dev, "failed to register LED %d\n",
				led_dat->id);
			goto err;
		}

		ret = adp5520_led_setup(led_dat);
		if (ret) {
			dev_err(&pdev->dev, "failed to write\n");
			i++;
			goto err;
		}
	}

	platform_set_drvdata(pdev, led);
	return 0;

err:
	if (i > 0) {
		for (i = i - 1; i >= 0; i--) {
			led_classdev_unregister(&led[i].cdev);
			cancel_work_sync(&led[i].work);
		}
	}

	return ret;
}

static int adp5520_led_remove(struct platform_device *pdev)
{
	struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
	struct adp5520_led *led;
	int i;

	led = platform_get_drvdata(pdev);

	adp5520_clr_bits(led->master, ADP5520_LED_CONTROL,
		 ADP5520_LED1_EN | ADP5520_LED2_EN | ADP5520_LED3_EN);

	for (i = 0; i < pdata->num_leds; i++) {
		led_classdev_unregister(&led[i].cdev);
		cancel_work_sync(&led[i].work);
	}

	return 0;
}

static struct platform_driver adp5520_led_driver = {
	.driver	= {
		.name	= "adp5520-led",
	},
	.probe		= adp5520_led_probe,
	.remove		= adp5520_led_remove,
};

module_platform_driver(adp5520_led_driver);

MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("LEDS ADP5520(01) Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:adp5520-led");
Commit	Line	Data
ed4a10b4 MH	1	/*
	2	* LEDs driver for Analog Devices ADP5520/ADP5501 MFD PMICs
	3	*
	4	* Copyright 2009 Analog Devices Inc.
	5	*
	6	* Loosely derived from leds-da903x:
	7	* Copyright (C) 2008 Compulab, Ltd.
ef734162	8	* Mike Rapoport <mike@compulab.co.il>
ed4a10b4 MH	9	*
ed4a10b4 MH	10	* Copyright (C) 2006-2008 Marvell International Ltd.
ef734162	11	* Eric Miao <eric.miao@marvell.com>
ed4a10b4 MH	12	*
	13	* Licensed under the GPL-2 or later.
	14	*/
	15
	16	#include <linux/module.h>
	17	#include <linux/kernel.h>
ed4a10b4 MH	18	#include <linux/platform_device.h>
	19	#include <linux/leds.h>
	20	#include <linux/workqueue.h>
	21	#include <linux/mfd/adp5520.h>
5a0e3ad6	22	#include <linux/slab.h>
ed4a10b4 MH	23
	24	struct adp5520_led {
	25	struct led_classdev cdev;
	26	struct work_struct work;
	27	struct device *master;
	28	enum led_brightness new_brightness;
	29	int id;
	30	int flags;
	31	};
	32
	33	static void adp5520_led_work(struct work_struct *work)
	34	{
	35	struct adp5520_led *led = container_of(work, struct adp5520_led, work);
	36	adp5520_write(led->master, ADP5520_LED1_CURRENT + led->id - 1,
	37	led->new_brightness >> 2);
	38	}
	39
	40	static void adp5520_led_set(struct led_classdev *led_cdev,
	41	enum led_brightness value)
	42	{
	43	struct adp5520_led *led;
	44
	45	led = container_of(led_cdev, struct adp5520_led, cdev);
	46	led->new_brightness = value;
	47	schedule_work(&led->work);
	48	}
	49
	50	static int adp5520_led_setup(struct adp5520_led *led)
	51	{
	52	struct device *dev = led->master;
	53	int flags = led->flags;
	54	int ret = 0;
	55
	56	switch (led->id) {
	57	case FLAG_ID_ADP5520_LED1_ADP5501_LED0:
	58	ret \|= adp5520_set_bits(dev, ADP5520_LED_TIME,
	59	(flags >> ADP5520_FLAG_OFFT_SHIFT) &
	60	ADP5520_FLAG_OFFT_MASK);
	61	ret \|= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
	62	ADP5520_LED1_EN);
	63	break;
	64	case FLAG_ID_ADP5520_LED2_ADP5501_LED1:
	65	ret \|= adp5520_set_bits(dev, ADP5520_LED_TIME,
	66	((flags >> ADP5520_FLAG_OFFT_SHIFT) &
	67	ADP5520_FLAG_OFFT_MASK) << 2);
	68	ret \|= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
	69	ADP5520_R3_MODE);
	70	ret \|= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
	71	ADP5520_LED2_EN);
	72	break;
	73	case FLAG_ID_ADP5520_LED3_ADP5501_LED2:
	74	ret \|= adp5520_set_bits(dev, ADP5520_LED_TIME,
	75	((flags >> ADP5520_FLAG_OFFT_SHIFT) &
	76	ADP5520_FLAG_OFFT_MASK) << 4);
	77	ret \|= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
	78	ADP5520_C3_MODE);
	79	ret \|= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
	80	ADP5520_LED3_EN);
	81	break;
	82	}
	83
	84	return ret;
	85	}
	86
98ea1ea2	87	static int adp5520_led_prepare(struct platform_device *pdev)
ed4a10b4	88	{
87aae1ea	89	struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
ed4a10b4 MH	90	struct device *dev = pdev->dev.parent;
	91	int ret = 0;
	92
	93	ret \|= adp5520_write(dev, ADP5520_LED1_CURRENT, 0);
	94	ret \|= adp5520_write(dev, ADP5520_LED2_CURRENT, 0);
	95	ret \|= adp5520_write(dev, ADP5520_LED3_CURRENT, 0);
	96	ret \|= adp5520_write(dev, ADP5520_LED_TIME, pdata->led_on_time << 6);
	97	ret \|= adp5520_write(dev, ADP5520_LED_FADE, FADE_VAL(pdata->fade_in,
	98	pdata->fade_out));
	99
	100	return ret;
	101	}
	102
98ea1ea2	103	static int adp5520_led_probe(struct platform_device *pdev)
ed4a10b4	104	{
87aae1ea	105	struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
ed4a10b4 MH	106	struct adp5520_led led, led_dat;
	107	struct led_info *cur_led;
	108	int ret, i;
	109
	110	if (pdata == NULL) {
	111	dev_err(&pdev->dev, "missing platform data\n");
	112	return -ENODEV;
	113	}
	114
	115	if (pdata->num_leds > ADP5520_01_MAXLEDS) {
	116	dev_err(&pdev->dev, "can't handle more than %d LEDS\n",
	117	ADP5520_01_MAXLEDS);
	118	return -EFAULT;
	119	}
	120
bcbf0162 BW	121	led = devm_kzalloc(&pdev->dev, sizeof(led) pdata->num_leds,
bcbf0162 BW	122	GFP_KERNEL);
0c9a03b6	123	if (!led)
ed4a10b4	124	return -ENOMEM;
ed4a10b4 MH	125
ed4a10b4 MH	126	ret = adp5520_led_prepare(pdev);
ed4a10b4 MH	127	if (ret) {
ed4a10b4 MH	128	dev_err(&pdev->dev, "failed to write\n");
bcbf0162	129	return ret;
ed4a10b4 MH	130	}
	131
	132	for (i = 0; i < pdata->num_leds; ++i) {
	133	cur_led = &pdata->leds[i];
	134	led_dat = &led[i];
	135
	136	led_dat->cdev.name = cur_led->name;
	137	led_dat->cdev.default_trigger = cur_led->default_trigger;
	138	led_dat->cdev.brightness_set = adp5520_led_set;
	139	led_dat->cdev.brightness = LED_OFF;
	140
	141	if (cur_led->flags & ADP5520_FLAG_LED_MASK)
	142	led_dat->flags = cur_led->flags;
	143	else
	144	led_dat->flags = i + 1;
	145
	146	led_dat->id = led_dat->flags & ADP5520_FLAG_LED_MASK;
	147
	148	led_dat->master = pdev->dev.parent;
	149	led_dat->new_brightness = LED_OFF;
	150
	151	INIT_WORK(&led_dat->work, adp5520_led_work);
	152
	153	ret = led_classdev_register(led_dat->master, &led_dat->cdev);
	154	if (ret) {
	155	dev_err(&pdev->dev, "failed to register LED %d\n",
	156	led_dat->id);
	157	goto err;
	158	}
	159
	160	ret = adp5520_led_setup(led_dat);
	161	if (ret) {
	162	dev_err(&pdev->dev, "failed to write\n");
	163	i++;
	164	goto err;
	165	}
	166	}
	167
	168	platform_set_drvdata(pdev, led);
	169	return 0;
	170
	171	err:
	172	if (i > 0) {
	173	for (i = i - 1; i >= 0; i--) {
	174	led_classdev_unregister(&led[i].cdev);
	175	cancel_work_sync(&led[i].work);
	176	}
	177	}
	178
ed4a10b4 MH	179	return ret;
	180	}
	181
678e8a6b	182	static int adp5520_led_remove(struct platform_device *pdev)
ed4a10b4	183	{
87aae1ea	184	struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
ed4a10b4 MH	185	struct adp5520_led *led;
	186	int i;
	187
	188	led = platform_get_drvdata(pdev);
	189
	190	adp5520_clr_bits(led->master, ADP5520_LED_CONTROL,
	191	ADP5520_LED1_EN \| ADP5520_LED2_EN \| ADP5520_LED3_EN);
	192
	193	for (i = 0; i < pdata->num_leds; i++) {
	194	led_classdev_unregister(&led[i].cdev);
	195	cancel_work_sync(&led[i].work);
	196	}
	197
ed4a10b4 MH	198	return 0;
	199	}
	200
	201	static struct platform_driver adp5520_led_driver = {
	202	.driver = {
	203	.name = "adp5520-led",
ed4a10b4 MH	204	},
ed4a10b4 MH	205	.probe = adp5520_led_probe,
df07cf81	206	.remove = adp5520_led_remove,
ed4a10b4 MH	207	};
ed4a10b4 MH	208
892a8843	209	module_platform_driver(adp5520_led_driver);
ed4a10b4 MH	210
	211	MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
	212	MODULE_DESCRIPTION("LEDS ADP5520(01) Driver");
	213	MODULE_LICENSE("GPL");
	214	MODULE_ALIAS("platform:adp5520-led");