[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / video / backlight / adp5520_bl.c

/*
 * Backlight driver for Analog Devices ADP5520/ADP5501 MFD PMICs
 *
 * Copyright 2009 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/fb.h>
#include <linux/backlight.h>
#include <linux/mfd/adp5520.h>
#include <linux/slab.h>
#include <linux/module.h>

struct adp5520_bl {
	struct device *master;
	struct adp5520_backlight_platform_data *pdata;
	struct mutex lock;
	unsigned long cached_daylight_max;
	int id;
	int current_brightness;
};

static int adp5520_bl_set(struct backlight_device *bl, int brightness)
{
	struct adp5520_bl *data = bl_get_data(bl);
	struct device *master = data->master;
	int ret = 0;

	if (data->pdata->en_ambl_sens) {
		if ((brightness > 0) && (brightness < ADP5020_MAX_BRIGHTNESS)) {
			/* Disable Ambient Light auto adjust */
			ret |= adp5520_clr_bits(master, ADP5520_BL_CONTROL,
					ADP5520_BL_AUTO_ADJ);
			ret |= adp5520_write(master, ADP5520_DAYLIGHT_MAX,
					brightness);
		} else {
			/*
			 * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust
			 * restore daylight l3 sysfs brightness
			 */
			ret |= adp5520_write(master, ADP5520_DAYLIGHT_MAX,
					 data->cached_daylight_max);
			ret |= adp5520_set_bits(master, ADP5520_BL_CONTROL,
					 ADP5520_BL_AUTO_ADJ);
		}
	} else {
		ret |= adp5520_write(master, ADP5520_DAYLIGHT_MAX, brightness);
	}

	if (data->current_brightness && brightness == 0)
		ret |= adp5520_set_bits(master,
				ADP5520_MODE_STATUS, ADP5520_DIM_EN);
	else if (data->current_brightness == 0 && brightness)
		ret |= adp5520_clr_bits(master,
				ADP5520_MODE_STATUS, ADP5520_DIM_EN);

	if (!ret)
		data->current_brightness = brightness;

	return ret;
}

static int adp5520_bl_update_status(struct backlight_device *bl)
{
	int brightness = bl->props.brightness;
	if (bl->props.power != FB_BLANK_UNBLANK)
		brightness = 0;

	if (bl->props.fb_blank != FB_BLANK_UNBLANK)
		brightness = 0;

	return adp5520_bl_set(bl, brightness);
}

static int adp5520_bl_get_brightness(struct backlight_device *bl)
{
	struct adp5520_bl *data = bl_get_data(bl);
	int error;
	uint8_t reg_val;

	error = adp5520_read(data->master, ADP5520_BL_VALUE, &reg_val);

	return error ? data->current_brightness : reg_val;
}

static const struct backlight_ops adp5520_bl_ops = {
	.update_status	= adp5520_bl_update_status,
	.get_brightness	= adp5520_bl_get_brightness,
};

static int adp5520_bl_setup(struct backlight_device *bl)
{
	struct adp5520_bl *data = bl_get_data(bl);
	struct device *master = data->master;
	struct adp5520_backlight_platform_data *pdata = data->pdata;
	int ret = 0;

	ret |= adp5520_write(master, ADP5520_DAYLIGHT_MAX,
				pdata->l1_daylight_max);
	ret |= adp5520_write(master, ADP5520_DAYLIGHT_DIM,
				pdata->l1_daylight_dim);

	if (pdata->en_ambl_sens) {
		data->cached_daylight_max = pdata->l1_daylight_max;
		ret |= adp5520_write(master, ADP5520_OFFICE_MAX,
				pdata->l2_office_max);
		ret |= adp5520_write(master, ADP5520_OFFICE_DIM,
				pdata->l2_office_dim);
		ret |= adp5520_write(master, ADP5520_DARK_MAX,
				pdata->l3_dark_max);
		ret |= adp5520_write(master, ADP5520_DARK_DIM,
				pdata->l3_dark_dim);
		ret |= adp5520_write(master, ADP5520_L2_TRIP,
				pdata->l2_trip);
		ret |= adp5520_write(master, ADP5520_L2_HYS,
				pdata->l2_hyst);
		ret |= adp5520_write(master, ADP5520_L3_TRIP,
				 pdata->l3_trip);
		ret |= adp5520_write(master, ADP5520_L3_HYS,
				pdata->l3_hyst);
		ret |= adp5520_write(master, ADP5520_ALS_CMPR_CFG,
				ALS_CMPR_CFG_VAL(pdata->abml_filt,
				ADP5520_L3_EN));
	}

	ret |= adp5520_write(master, ADP5520_BL_CONTROL,
			BL_CTRL_VAL(pdata->fade_led_law,
					pdata->en_ambl_sens));

	ret |= adp5520_write(master, ADP5520_BL_FADE, FADE_VAL(pdata->fade_in,
			pdata->fade_out));

	ret |= adp5520_set_bits(master, ADP5520_MODE_STATUS,
			ADP5520_BL_EN | ADP5520_DIM_EN);

	return ret;
}

static ssize_t adp5520_show(struct device *dev, char *buf, int reg)
{
	struct adp5520_bl *data = dev_get_drvdata(dev);
	int error;
	uint8_t reg_val;

	mutex_lock(&data->lock);
	error = adp5520_read(data->master, reg, &reg_val);
	mutex_unlock(&data->lock);

	return sprintf(buf, "%u\n", reg_val);
}

static ssize_t adp5520_store(struct device *dev, const char *buf,
			 size_t count, int reg)
{
	struct adp5520_bl *data = dev_get_drvdata(dev);
	unsigned long val;
	int ret;

	ret = kstrtoul(buf, 10, &val);
	if (ret)
		return ret;

	mutex_lock(&data->lock);
	adp5520_write(data->master, reg, val);
	mutex_unlock(&data->lock);

	return count;
}

static ssize_t adp5520_bl_dark_max_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	return adp5520_show(dev, buf, ADP5520_DARK_MAX);
}

static ssize_t adp5520_bl_dark_max_store(struct device *dev,
			struct device_attribute *attr,
			const char *buf, size_t count)
{
	return adp5520_store(dev, buf, count, ADP5520_DARK_MAX);
}
static DEVICE_ATTR(dark_max, 0664, adp5520_bl_dark_max_show,
			adp5520_bl_dark_max_store);

static ssize_t adp5520_bl_office_max_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	return adp5520_show(dev, buf, ADP5520_OFFICE_MAX);
}

static ssize_t adp5520_bl_office_max_store(struct device *dev,
			struct device_attribute *attr,
			const char *buf, size_t count)
{
	return adp5520_store(dev, buf, count, ADP5520_OFFICE_MAX);
}
static DEVICE_ATTR(office_max, 0664, adp5520_bl_office_max_show,
			adp5520_bl_office_max_store);

static ssize_t adp5520_bl_daylight_max_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	return adp5520_show(dev, buf, ADP5520_DAYLIGHT_MAX);
}

static ssize_t adp5520_bl_daylight_max_store(struct device *dev,
			struct device_attribute *attr,
			const char *buf, size_t count)
{
	struct adp5520_bl *data = dev_get_drvdata(dev);
	int ret;

	ret = kstrtoul(buf, 10, &data->cached_daylight_max);
	if (ret < 0)
		return ret;

	return adp5520_store(dev, buf, count, ADP5520_DAYLIGHT_MAX);
}
static DEVICE_ATTR(daylight_max, 0664, adp5520_bl_daylight_max_show,
			adp5520_bl_daylight_max_store);

static ssize_t adp5520_bl_dark_dim_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	return adp5520_show(dev, buf, ADP5520_DARK_DIM);
}

static ssize_t adp5520_bl_dark_dim_store(struct device *dev,
			struct device_attribute *attr,
			const char *buf, size_t count)
{
	return adp5520_store(dev, buf, count, ADP5520_DARK_DIM);
}
static DEVICE_ATTR(dark_dim, 0664, adp5520_bl_dark_dim_show,
			adp5520_bl_dark_dim_store);

static ssize_t adp5520_bl_office_dim_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	return adp5520_show(dev, buf, ADP5520_OFFICE_DIM);
}

static ssize_t adp5520_bl_office_dim_store(struct device *dev,
			struct device_attribute *attr,
			const char *buf, size_t count)
{
	return adp5520_store(dev, buf, count, ADP5520_OFFICE_DIM);
}
static DEVICE_ATTR(office_dim, 0664, adp5520_bl_office_dim_show,
			adp5520_bl_office_dim_store);

static ssize_t adp5520_bl_daylight_dim_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	return adp5520_show(dev, buf, ADP5520_DAYLIGHT_DIM);
}

static ssize_t adp5520_bl_daylight_dim_store(struct device *dev,
			struct device_attribute *attr,
			const char *buf, size_t count)
{
	return adp5520_store(dev, buf, count, ADP5520_DAYLIGHT_DIM);
}
static DEVICE_ATTR(daylight_dim, 0664, adp5520_bl_daylight_dim_show,
			adp5520_bl_daylight_dim_store);

static struct attribute *adp5520_bl_attributes[] = {
	&dev_attr_dark_max.attr,
	&dev_attr_dark_dim.attr,
	&dev_attr_office_max.attr,
	&dev_attr_office_dim.attr,
	&dev_attr_daylight_max.attr,
	&dev_attr_daylight_dim.attr,
	NULL
};

static const struct attribute_group adp5520_bl_attr_group = {
	.attrs = adp5520_bl_attributes,
};

static int __devinit adp5520_bl_probe(struct platform_device *pdev)
{
	struct backlight_properties props;
	struct backlight_device *bl;
	struct adp5520_bl *data;
	int ret = 0;

	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
	if (data == NULL)
		return -ENOMEM;

	data->master = pdev->dev.parent;
	data->pdata = pdev->dev.platform_data;

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

	data->id = pdev->id;
	data->current_brightness = 0;

	mutex_init(&data->lock);

	memset(&props, 0, sizeof(struct backlight_properties));
	props.type = BACKLIGHT_RAW;
	props.max_brightness = ADP5020_MAX_BRIGHTNESS;
	bl = backlight_device_register(pdev->name, data->master, data,
				       &adp5520_bl_ops, &props);
	if (IS_ERR(bl)) {
		dev_err(&pdev->dev, "failed to register backlight\n");
		return PTR_ERR(bl);
	}

	bl->props.brightness = ADP5020_MAX_BRIGHTNESS;
	if (data->pdata->en_ambl_sens)
		ret = sysfs_create_group(&bl->dev.kobj,
			&adp5520_bl_attr_group);

	if (ret) {
		dev_err(&pdev->dev, "failed to register sysfs\n");
		backlight_device_unregister(bl);
	}

	platform_set_drvdata(pdev, bl);
	ret |= adp5520_bl_setup(bl);
	backlight_update_status(bl);

	return ret;
}

static int __devexit adp5520_bl_remove(struct platform_device *pdev)
{
	struct backlight_device *bl = platform_get_drvdata(pdev);
	struct adp5520_bl *data = bl_get_data(bl);

	adp5520_clr_bits(data->master, ADP5520_MODE_STATUS, ADP5520_BL_EN);

	if (data->pdata->en_ambl_sens)
		sysfs_remove_group(&bl->dev.kobj,
				&adp5520_bl_attr_group);

	backlight_device_unregister(bl);

	return 0;
}

#ifdef CONFIG_PM
static int adp5520_bl_suspend(struct platform_device *pdev,
				 pm_message_t state)
{
	struct backlight_device *bl = platform_get_drvdata(pdev);
	return adp5520_bl_set(bl, 0);
}

static int adp5520_bl_resume(struct platform_device *pdev)
{
	struct backlight_device *bl = platform_get_drvdata(pdev);

	backlight_update_status(bl);
	return 0;
}
#else
#define adp5520_bl_suspend	NULL
#define adp5520_bl_resume	NULL
#endif

static struct platform_driver adp5520_bl_driver = {
	.driver		= {
		.name	= "adp5520-backlight",
		.owner	= THIS_MODULE,
	},
	.probe		= adp5520_bl_probe,
	.remove		= adp5520_bl_remove,
	.suspend	= adp5520_bl_suspend,
	.resume		= adp5520_bl_resume,
};

module_platform_driver(adp5520_bl_driver);

MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("ADP5520(01) Backlight Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:adp5520-backlight");
Commit	Line	Data
a7998cec MH	1	/*
	2	* Backlight driver for Analog Devices ADP5520/ADP5501 MFD PMICs
	3	*
	4	* Copyright 2009 Analog Devices Inc.
	5	*
	6	* Licensed under the GPL-2 or later.
	7	*/
	8
	9	#include <linux/kernel.h>
	10	#include <linux/init.h>
	11	#include <linux/platform_device.h>
	12	#include <linux/fb.h>
	13	#include <linux/backlight.h>
	14	#include <linux/mfd/adp5520.h>
5a0e3ad6	15	#include <linux/slab.h>
355b200b	16	#include <linux/module.h>
a7998cec MH	17
	18	struct adp5520_bl {
	19	struct device *master;
c24b6b6a	20	struct adp5520_backlight_platform_data *pdata;
a7998cec MH	21	struct mutex lock;
	22	unsigned long cached_daylight_max;
	23	int id;
	24	int current_brightness;
	25	};
	26
	27	static int adp5520_bl_set(struct backlight_device *bl, int brightness)
	28	{
	29	struct adp5520_bl *data = bl_get_data(bl);
	30	struct device *master = data->master;
	31	int ret = 0;
	32
	33	if (data->pdata->en_ambl_sens) {
	34	if ((brightness > 0) && (brightness < ADP5020_MAX_BRIGHTNESS)) {
	35	/* Disable Ambient Light auto adjust */
c24b6b6a MH	36	ret \|= adp5520_clr_bits(master, ADP5520_BL_CONTROL,
	37	ADP5520_BL_AUTO_ADJ);
	38	ret \|= adp5520_write(master, ADP5520_DAYLIGHT_MAX,
	39	brightness);
a7998cec MH	40	} else {
	41	/*
	42	* MAX_BRIGHTNESS -> Enable Ambient Light auto adjust
	43	* restore daylight l3 sysfs brightness
	44	*/
c24b6b6a	45	ret \|= adp5520_write(master, ADP5520_DAYLIGHT_MAX,
a7998cec	46	data->cached_daylight_max);
c24b6b6a MH	47	ret \|= adp5520_set_bits(master, ADP5520_BL_CONTROL,
c24b6b6a MH	48	ADP5520_BL_AUTO_ADJ);
a7998cec MH	49	}
a7998cec MH	50	} else {
c24b6b6a	51	ret \|= adp5520_write(master, ADP5520_DAYLIGHT_MAX, brightness);
a7998cec MH	52	}
	53
	54	if (data->current_brightness && brightness == 0)
	55	ret \|= adp5520_set_bits(master,
c24b6b6a	56	ADP5520_MODE_STATUS, ADP5520_DIM_EN);
a7998cec MH	57	else if (data->current_brightness == 0 && brightness)
a7998cec MH	58	ret \|= adp5520_clr_bits(master,
c24b6b6a	59	ADP5520_MODE_STATUS, ADP5520_DIM_EN);
a7998cec MH	60
	61	if (!ret)
	62	data->current_brightness = brightness;
	63
	64	return ret;
	65	}
	66
	67	static int adp5520_bl_update_status(struct backlight_device *bl)
	68	{
	69	int brightness = bl->props.brightness;
	70	if (bl->props.power != FB_BLANK_UNBLANK)
	71	brightness = 0;
	72
	73	if (bl->props.fb_blank != FB_BLANK_UNBLANK)
	74	brightness = 0;
	75
	76	return adp5520_bl_set(bl, brightness);
	77	}
	78
	79	static int adp5520_bl_get_brightness(struct backlight_device *bl)
	80	{
	81	struct adp5520_bl *data = bl_get_data(bl);
	82	int error;
	83	uint8_t reg_val;
	84
c24b6b6a	85	error = adp5520_read(data->master, ADP5520_BL_VALUE, &reg_val);
a7998cec MH	86
	87	return error ? data->current_brightness : reg_val;
	88	}
	89
9905a43b	90	static const struct backlight_ops adp5520_bl_ops = {
a7998cec MH	91	.update_status = adp5520_bl_update_status,
	92	.get_brightness = adp5520_bl_get_brightness,
	93	};
	94
	95	static int adp5520_bl_setup(struct backlight_device *bl)
	96	{
	97	struct adp5520_bl *data = bl_get_data(bl);
	98	struct device *master = data->master;
c24b6b6a	99	struct adp5520_backlight_platform_data *pdata = data->pdata;
a7998cec MH	100	int ret = 0;
a7998cec MH	101
c24b6b6a MH	102	ret \|= adp5520_write(master, ADP5520_DAYLIGHT_MAX,
	103	pdata->l1_daylight_max);
	104	ret \|= adp5520_write(master, ADP5520_DAYLIGHT_DIM,
	105	pdata->l1_daylight_dim);
a7998cec MH	106
	107	if (pdata->en_ambl_sens) {
	108	data->cached_daylight_max = pdata->l1_daylight_max;
c24b6b6a MH	109	ret \|= adp5520_write(master, ADP5520_OFFICE_MAX,
	110	pdata->l2_office_max);
	111	ret \|= adp5520_write(master, ADP5520_OFFICE_DIM,
	112	pdata->l2_office_dim);
	113	ret \|= adp5520_write(master, ADP5520_DARK_MAX,
	114	pdata->l3_dark_max);
	115	ret \|= adp5520_write(master, ADP5520_DARK_DIM,
	116	pdata->l3_dark_dim);
	117	ret \|= adp5520_write(master, ADP5520_L2_TRIP,
	118	pdata->l2_trip);
	119	ret \|= adp5520_write(master, ADP5520_L2_HYS,
	120	pdata->l2_hyst);
	121	ret \|= adp5520_write(master, ADP5520_L3_TRIP,
	122	pdata->l3_trip);
	123	ret \|= adp5520_write(master, ADP5520_L3_HYS,
	124	pdata->l3_hyst);
	125	ret \|= adp5520_write(master, ADP5520_ALS_CMPR_CFG,
	126	ALS_CMPR_CFG_VAL(pdata->abml_filt,
	127	ADP5520_L3_EN));
a7998cec MH	128	}
a7998cec MH	129
c24b6b6a MH	130	ret \|= adp5520_write(master, ADP5520_BL_CONTROL,
	131	BL_CTRL_VAL(pdata->fade_led_law,
	132	pdata->en_ambl_sens));
a7998cec	133
c24b6b6a	134	ret \|= adp5520_write(master, ADP5520_BL_FADE, FADE_VAL(pdata->fade_in,
a7998cec MH	135	pdata->fade_out));
a7998cec MH	136
c24b6b6a MH	137	ret \|= adp5520_set_bits(master, ADP5520_MODE_STATUS,
c24b6b6a MH	138	ADP5520_BL_EN \| ADP5520_DIM_EN);
a7998cec MH	139
	140	return ret;
	141	}
	142
	143	static ssize_t adp5520_show(struct device dev, char buf, int reg)
	144	{
	145	struct adp5520_bl *data = dev_get_drvdata(dev);
	146	int error;
	147	uint8_t reg_val;
	148
	149	mutex_lock(&data->lock);
	150	error = adp5520_read(data->master, reg, &reg_val);
	151	mutex_unlock(&data->lock);
	152
	153	return sprintf(buf, "%u\n", reg_val);
	154	}
	155
	156	static ssize_t adp5520_store(struct device dev, const char buf,
	157	size_t count, int reg)
	158	{
	159	struct adp5520_bl *data = dev_get_drvdata(dev);
	160	unsigned long val;
	161	int ret;
	162
71d7225c	163	ret = kstrtoul(buf, 10, &val);
a7998cec MH	164	if (ret)
	165	return ret;
	166
	167	mutex_lock(&data->lock);
	168	adp5520_write(data->master, reg, val);
	169	mutex_unlock(&data->lock);
	170
	171	return count;
	172	}
	173
	174	static ssize_t adp5520_bl_dark_max_show(struct device *dev,
c24b6b6a	175	struct device_attribute attr, char buf)
a7998cec	176	{
c24b6b6a	177	return adp5520_show(dev, buf, ADP5520_DARK_MAX);
a7998cec MH	178	}
	179
	180	static ssize_t adp5520_bl_dark_max_store(struct device *dev,
c24b6b6a MH	181	struct device_attribute *attr,
c24b6b6a MH	182	const char *buf, size_t count)
a7998cec	183	{
c24b6b6a	184	return adp5520_store(dev, buf, count, ADP5520_DARK_MAX);
a7998cec MH	185	}
	186	static DEVICE_ATTR(dark_max, 0664, adp5520_bl_dark_max_show,
	187	adp5520_bl_dark_max_store);
	188
	189	static ssize_t adp5520_bl_office_max_show(struct device *dev,
c24b6b6a	190	struct device_attribute attr, char buf)
a7998cec	191	{
c24b6b6a	192	return adp5520_show(dev, buf, ADP5520_OFFICE_MAX);
a7998cec MH	193	}
	194
	195	static ssize_t adp5520_bl_office_max_store(struct device *dev,
c24b6b6a MH	196	struct device_attribute *attr,
c24b6b6a MH	197	const char *buf, size_t count)
a7998cec	198	{
c24b6b6a	199	return adp5520_store(dev, buf, count, ADP5520_OFFICE_MAX);
a7998cec MH	200	}
	201	static DEVICE_ATTR(office_max, 0664, adp5520_bl_office_max_show,
	202	adp5520_bl_office_max_store);
	203
	204	static ssize_t adp5520_bl_daylight_max_show(struct device *dev,
	205	struct device_attribute attr, char buf)
	206	{
c24b6b6a	207	return adp5520_show(dev, buf, ADP5520_DAYLIGHT_MAX);
a7998cec MH	208	}
	209
	210	static ssize_t adp5520_bl_daylight_max_store(struct device *dev,
c24b6b6a MH	211	struct device_attribute *attr,
c24b6b6a MH	212	const char *buf, size_t count)
a7998cec MH	213	{
a7998cec MH	214	struct adp5520_bl *data = dev_get_drvdata(dev);
877947bc LY	215	int ret;
877947bc LY	216
71d7225c	217	ret = kstrtoul(buf, 10, &data->cached_daylight_max);
877947bc LY	218	if (ret < 0)
877947bc LY	219	return ret;
a7998cec	220
c24b6b6a	221	return adp5520_store(dev, buf, count, ADP5520_DAYLIGHT_MAX);
a7998cec MH	222	}
	223	static DEVICE_ATTR(daylight_max, 0664, adp5520_bl_daylight_max_show,
	224	adp5520_bl_daylight_max_store);
	225
	226	static ssize_t adp5520_bl_dark_dim_show(struct device *dev,
	227	struct device_attribute attr, char buf)
	228	{
c24b6b6a	229	return adp5520_show(dev, buf, ADP5520_DARK_DIM);
a7998cec MH	230	}
	231
	232	static ssize_t adp5520_bl_dark_dim_store(struct device *dev,
c24b6b6a MH	233	struct device_attribute *attr,
c24b6b6a MH	234	const char *buf, size_t count)
a7998cec	235	{
c24b6b6a	236	return adp5520_store(dev, buf, count, ADP5520_DARK_DIM);
a7998cec MH	237	}
	238	static DEVICE_ATTR(dark_dim, 0664, adp5520_bl_dark_dim_show,
	239	adp5520_bl_dark_dim_store);
	240
	241	static ssize_t adp5520_bl_office_dim_show(struct device *dev,
	242	struct device_attribute attr, char buf)
	243	{
c24b6b6a	244	return adp5520_show(dev, buf, ADP5520_OFFICE_DIM);
a7998cec MH	245	}
	246
	247	static ssize_t adp5520_bl_office_dim_store(struct device *dev,
c24b6b6a MH	248	struct device_attribute *attr,
c24b6b6a MH	249	const char *buf, size_t count)
a7998cec	250	{
c24b6b6a	251	return adp5520_store(dev, buf, count, ADP5520_OFFICE_DIM);
a7998cec MH	252	}
	253	static DEVICE_ATTR(office_dim, 0664, adp5520_bl_office_dim_show,
	254	adp5520_bl_office_dim_store);
	255
	256	static ssize_t adp5520_bl_daylight_dim_show(struct device *dev,
c24b6b6a	257	struct device_attribute attr, char buf)
a7998cec	258	{
c24b6b6a	259	return adp5520_show(dev, buf, ADP5520_DAYLIGHT_DIM);
a7998cec MH	260	}
	261
	262	static ssize_t adp5520_bl_daylight_dim_store(struct device *dev,
c24b6b6a MH	263	struct device_attribute *attr,
c24b6b6a MH	264	const char *buf, size_t count)
a7998cec	265	{
c24b6b6a	266	return adp5520_store(dev, buf, count, ADP5520_DAYLIGHT_DIM);
a7998cec MH	267	}
	268	static DEVICE_ATTR(daylight_dim, 0664, adp5520_bl_daylight_dim_show,
	269	adp5520_bl_daylight_dim_store);
	270
	271	static struct attribute *adp5520_bl_attributes[] = {
	272	&dev_attr_dark_max.attr,
	273	&dev_attr_dark_dim.attr,
	274	&dev_attr_office_max.attr,
	275	&dev_attr_office_dim.attr,
	276	&dev_attr_daylight_max.attr,
	277	&dev_attr_daylight_dim.attr,
	278	NULL
	279	};
	280
	281	static const struct attribute_group adp5520_bl_attr_group = {
	282	.attrs = adp5520_bl_attributes,
	283	};
	284
	285	static int __devinit adp5520_bl_probe(struct platform_device *pdev)
	286	{
a19a6ee6	287	struct backlight_properties props;
a7998cec MH	288	struct backlight_device *bl;
	289	struct adp5520_bl *data;
	290	int ret = 0;
	291
050ea48b	292	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
a7998cec MH	293	if (data == NULL)
	294	return -ENOMEM;
	295
	296	data->master = pdev->dev.parent;
	297	data->pdata = pdev->dev.platform_data;
	298
	299	if (data->pdata == NULL) {
	300	dev_err(&pdev->dev, "missing platform data\n");
a7998cec MH	301	return -ENODEV;
	302	}
	303
	304	data->id = pdev->id;
	305	data->current_brightness = 0;
	306
	307	mutex_init(&data->lock);
	308
a19a6ee6	309	memset(&props, 0, sizeof(struct backlight_properties));
bb7ca747	310	props.type = BACKLIGHT_RAW;
a19a6ee6 MG	311	props.max_brightness = ADP5020_MAX_BRIGHTNESS;
	312	bl = backlight_device_register(pdev->name, data->master, data,
	313	&adp5520_bl_ops, &props);
a7998cec MH	314	if (IS_ERR(bl)) {
a7998cec MH	315	dev_err(&pdev->dev, "failed to register backlight\n");
a7998cec MH	316	return PTR_ERR(bl);
	317	}
	318
a19a6ee6	319	bl->props.brightness = ADP5020_MAX_BRIGHTNESS;
a7998cec MH	320	if (data->pdata->en_ambl_sens)
	321	ret = sysfs_create_group(&bl->dev.kobj,
	322	&adp5520_bl_attr_group);
	323
	324	if (ret) {
	325	dev_err(&pdev->dev, "failed to register sysfs\n");
	326	backlight_device_unregister(bl);
a7998cec MH	327	}
	328
	329	platform_set_drvdata(pdev, bl);
	330	ret \|= adp5520_bl_setup(bl);
	331	backlight_update_status(bl);
	332
	333	return ret;
	334	}
	335
	336	static int __devexit adp5520_bl_remove(struct platform_device *pdev)
	337	{
	338	struct backlight_device *bl = platform_get_drvdata(pdev);
	339	struct adp5520_bl *data = bl_get_data(bl);
	340
c24b6b6a	341	adp5520_clr_bits(data->master, ADP5520_MODE_STATUS, ADP5520_BL_EN);
a7998cec MH	342
	343	if (data->pdata->en_ambl_sens)
	344	sysfs_remove_group(&bl->dev.kobj,
	345	&adp5520_bl_attr_group);
	346
	347	backlight_device_unregister(bl);
a7998cec MH	348
	349	return 0;
	350	}
	351
	352	#ifdef CONFIG_PM
	353	static int adp5520_bl_suspend(struct platform_device *pdev,
	354	pm_message_t state)
	355	{
	356	struct backlight_device *bl = platform_get_drvdata(pdev);
	357	return adp5520_bl_set(bl, 0);
	358	}
	359
	360	static int adp5520_bl_resume(struct platform_device *pdev)
	361	{
	362	struct backlight_device *bl = platform_get_drvdata(pdev);
	363
	364	backlight_update_status(bl);
	365	return 0;
	366	}
	367	#else
	368	#define adp5520_bl_suspend NULL
	369	#define adp5520_bl_resume NULL
	370	#endif
	371
	372	static struct platform_driver adp5520_bl_driver = {
	373	.driver = {
	374	.name = "adp5520-backlight",
	375	.owner = THIS_MODULE,
	376	},
	377	.probe = adp5520_bl_probe,
d1723fa2	378	.remove = adp5520_bl_remove,
a7998cec MH	379	.suspend = adp5520_bl_suspend,
	380	.resume = adp5520_bl_resume,
	381	};
	382
81178e02	383	module_platform_driver(adp5520_bl_driver);
a7998cec MH	384
	385	MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
	386	MODULE_DESCRIPTION("ADP5520(01) Backlight Driver");
	387	MODULE_LICENSE("GPL");
	388	MODULE_ALIAS("platform:adp5520-backlight");