[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 ret;
	uint8_t reg_val;

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

	if (ret < 0)
		return ret;

	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 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 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_SLEEP
static int adp5520_bl_suspend(struct device *dev)
{
	struct backlight_device *bl = dev_get_drvdata(dev);

	return adp5520_bl_set(bl, 0);
}

static int adp5520_bl_resume(struct device *dev)
{
	struct backlight_device *bl = dev_get_drvdata(dev);

	backlight_update_status(bl);
	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(adp5520_bl_pm_ops, adp5520_bl_suspend,
			adp5520_bl_resume);

static struct platform_driver adp5520_bl_driver = {
	.driver		= {
		.name	= "adp5520-backlight",
		.owner	= THIS_MODULE,
		.pm	= &adp5520_bl_pm_ops,
	},
	.probe		= adp5520_bl_probe,
	.remove		= adp5520_bl_remove,
};

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);
359177e0	146	int ret;
a7998cec MH	147	uint8_t reg_val;
	148
	149	mutex_lock(&data->lock);
359177e0	150	ret = adp5520_read(data->master, reg, &reg_val);
a7998cec MH	151	mutex_unlock(&data->lock);
a7998cec MH	152
359177e0 DN	153	if (ret < 0)
	154	return ret;
	155
a7998cec MH	156	return sprintf(buf, "%u\n", reg_val);
	157	}
	158
	159	static ssize_t adp5520_store(struct device dev, const char buf,
	160	size_t count, int reg)
	161	{
	162	struct adp5520_bl *data = dev_get_drvdata(dev);
	163	unsigned long val;
	164	int ret;
	165
71d7225c	166	ret = kstrtoul(buf, 10, &val);
a7998cec MH	167	if (ret)
	168	return ret;
	169
	170	mutex_lock(&data->lock);
	171	adp5520_write(data->master, reg, val);
	172	mutex_unlock(&data->lock);
	173
	174	return count;
	175	}
	176
	177	static ssize_t adp5520_bl_dark_max_show(struct device *dev,
c24b6b6a	178	struct device_attribute attr, char buf)
a7998cec	179	{
c24b6b6a	180	return adp5520_show(dev, buf, ADP5520_DARK_MAX);
a7998cec MH	181	}
	182
	183	static ssize_t adp5520_bl_dark_max_store(struct device *dev,
c24b6b6a MH	184	struct device_attribute *attr,
c24b6b6a MH	185	const char *buf, size_t count)
a7998cec	186	{
c24b6b6a	187	return adp5520_store(dev, buf, count, ADP5520_DARK_MAX);
a7998cec MH	188	}
	189	static DEVICE_ATTR(dark_max, 0664, adp5520_bl_dark_max_show,
	190	adp5520_bl_dark_max_store);
	191
	192	static ssize_t adp5520_bl_office_max_show(struct device *dev,
c24b6b6a	193	struct device_attribute attr, char buf)
a7998cec	194	{
c24b6b6a	195	return adp5520_show(dev, buf, ADP5520_OFFICE_MAX);
a7998cec MH	196	}
	197
	198	static ssize_t adp5520_bl_office_max_store(struct device *dev,
c24b6b6a MH	199	struct device_attribute *attr,
c24b6b6a MH	200	const char *buf, size_t count)
a7998cec	201	{
c24b6b6a	202	return adp5520_store(dev, buf, count, ADP5520_OFFICE_MAX);
a7998cec MH	203	}
	204	static DEVICE_ATTR(office_max, 0664, adp5520_bl_office_max_show,
	205	adp5520_bl_office_max_store);
	206
	207	static ssize_t adp5520_bl_daylight_max_show(struct device *dev,
	208	struct device_attribute attr, char buf)
	209	{
c24b6b6a	210	return adp5520_show(dev, buf, ADP5520_DAYLIGHT_MAX);
a7998cec MH	211	}
	212
	213	static ssize_t adp5520_bl_daylight_max_store(struct device *dev,
c24b6b6a MH	214	struct device_attribute *attr,
c24b6b6a MH	215	const char *buf, size_t count)
a7998cec MH	216	{
a7998cec MH	217	struct adp5520_bl *data = dev_get_drvdata(dev);
877947bc LY	218	int ret;
877947bc LY	219
71d7225c	220	ret = kstrtoul(buf, 10, &data->cached_daylight_max);
877947bc LY	221	if (ret < 0)
877947bc LY	222	return ret;
a7998cec	223
c24b6b6a	224	return adp5520_store(dev, buf, count, ADP5520_DAYLIGHT_MAX);
a7998cec MH	225	}
	226	static DEVICE_ATTR(daylight_max, 0664, adp5520_bl_daylight_max_show,
	227	adp5520_bl_daylight_max_store);
	228
	229	static ssize_t adp5520_bl_dark_dim_show(struct device *dev,
	230	struct device_attribute attr, char buf)
	231	{
c24b6b6a	232	return adp5520_show(dev, buf, ADP5520_DARK_DIM);
a7998cec MH	233	}
	234
	235	static ssize_t adp5520_bl_dark_dim_store(struct device *dev,
c24b6b6a MH	236	struct device_attribute *attr,
c24b6b6a MH	237	const char *buf, size_t count)
a7998cec	238	{
c24b6b6a	239	return adp5520_store(dev, buf, count, ADP5520_DARK_DIM);
a7998cec MH	240	}
	241	static DEVICE_ATTR(dark_dim, 0664, adp5520_bl_dark_dim_show,
	242	adp5520_bl_dark_dim_store);
	243
	244	static ssize_t adp5520_bl_office_dim_show(struct device *dev,
	245	struct device_attribute attr, char buf)
	246	{
c24b6b6a	247	return adp5520_show(dev, buf, ADP5520_OFFICE_DIM);
a7998cec MH	248	}
	249
	250	static ssize_t adp5520_bl_office_dim_store(struct device *dev,
c24b6b6a MH	251	struct device_attribute *attr,
c24b6b6a MH	252	const char *buf, size_t count)
a7998cec	253	{
c24b6b6a	254	return adp5520_store(dev, buf, count, ADP5520_OFFICE_DIM);
a7998cec MH	255	}
	256	static DEVICE_ATTR(office_dim, 0664, adp5520_bl_office_dim_show,
	257	adp5520_bl_office_dim_store);
	258
	259	static ssize_t adp5520_bl_daylight_dim_show(struct device *dev,
c24b6b6a	260	struct device_attribute attr, char buf)
a7998cec	261	{
c24b6b6a	262	return adp5520_show(dev, buf, ADP5520_DAYLIGHT_DIM);
a7998cec MH	263	}
	264
	265	static ssize_t adp5520_bl_daylight_dim_store(struct device *dev,
c24b6b6a MH	266	struct device_attribute *attr,
c24b6b6a MH	267	const char *buf, size_t count)
a7998cec	268	{
c24b6b6a	269	return adp5520_store(dev, buf, count, ADP5520_DAYLIGHT_DIM);
a7998cec MH	270	}
	271	static DEVICE_ATTR(daylight_dim, 0664, adp5520_bl_daylight_dim_show,
	272	adp5520_bl_daylight_dim_store);
	273
	274	static struct attribute *adp5520_bl_attributes[] = {
	275	&dev_attr_dark_max.attr,
	276	&dev_attr_dark_dim.attr,
	277	&dev_attr_office_max.attr,
	278	&dev_attr_office_dim.attr,
	279	&dev_attr_daylight_max.attr,
	280	&dev_attr_daylight_dim.attr,
	281	NULL
	282	};
	283
	284	static const struct attribute_group adp5520_bl_attr_group = {
	285	.attrs = adp5520_bl_attributes,
	286	};
	287
1b9e450d	288	static int adp5520_bl_probe(struct platform_device *pdev)
a7998cec	289	{
a19a6ee6	290	struct backlight_properties props;
a7998cec MH	291	struct backlight_device *bl;
	292	struct adp5520_bl *data;
	293	int ret = 0;
	294
050ea48b	295	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
a7998cec MH	296	if (data == NULL)
	297	return -ENOMEM;
	298
	299	data->master = pdev->dev.parent;
	300	data->pdata = pdev->dev.platform_data;
	301
	302	if (data->pdata == NULL) {
	303	dev_err(&pdev->dev, "missing platform data\n");
a7998cec MH	304	return -ENODEV;
	305	}
	306
	307	data->id = pdev->id;
	308	data->current_brightness = 0;
	309
	310	mutex_init(&data->lock);
	311
a19a6ee6	312	memset(&props, 0, sizeof(struct backlight_properties));
bb7ca747	313	props.type = BACKLIGHT_RAW;
a19a6ee6 MG	314	props.max_brightness = ADP5020_MAX_BRIGHTNESS;
	315	bl = backlight_device_register(pdev->name, data->master, data,
	316	&adp5520_bl_ops, &props);
a7998cec MH	317	if (IS_ERR(bl)) {
a7998cec MH	318	dev_err(&pdev->dev, "failed to register backlight\n");
a7998cec MH	319	return PTR_ERR(bl);
	320	}
	321
a19a6ee6	322	bl->props.brightness = ADP5020_MAX_BRIGHTNESS;
a7998cec MH	323	if (data->pdata->en_ambl_sens)
	324	ret = sysfs_create_group(&bl->dev.kobj,
	325	&adp5520_bl_attr_group);
	326
	327	if (ret) {
	328	dev_err(&pdev->dev, "failed to register sysfs\n");
	329	backlight_device_unregister(bl);
a7998cec MH	330	}
	331
	332	platform_set_drvdata(pdev, bl);
	333	ret \|= adp5520_bl_setup(bl);
	334	backlight_update_status(bl);
	335
	336	return ret;
	337	}
	338
7e4b9d0b	339	static int adp5520_bl_remove(struct platform_device *pdev)
a7998cec MH	340	{
	341	struct backlight_device *bl = platform_get_drvdata(pdev);
	342	struct adp5520_bl *data = bl_get_data(bl);
	343
c24b6b6a	344	adp5520_clr_bits(data->master, ADP5520_MODE_STATUS, ADP5520_BL_EN);
a7998cec MH	345
	346	if (data->pdata->en_ambl_sens)
	347	sysfs_remove_group(&bl->dev.kobj,
	348	&adp5520_bl_attr_group);
	349
	350	backlight_device_unregister(bl);
a7998cec MH	351
	352	return 0;
	353	}
	354
14c1b778 JH	355	#ifdef CONFIG_PM_SLEEP
14c1b778 JH	356	static int adp5520_bl_suspend(struct device *dev)
a7998cec	357	{
14c1b778 JH	358	struct backlight_device *bl = dev_get_drvdata(dev);
14c1b778 JH	359
a7998cec MH	360	return adp5520_bl_set(bl, 0);
	361	}
	362
14c1b778	363	static int adp5520_bl_resume(struct device *dev)
a7998cec	364	{
14c1b778	365	struct backlight_device *bl = dev_get_drvdata(dev);
a7998cec MH	366
	367	backlight_update_status(bl);
	368	return 0;
	369	}
a7998cec MH	370	#endif
a7998cec MH	371
14c1b778 JH	372	static SIMPLE_DEV_PM_OPS(adp5520_bl_pm_ops, adp5520_bl_suspend,
	373	adp5520_bl_resume);
	374
a7998cec MH	375	static struct platform_driver adp5520_bl_driver = {
	376	.driver = {
	377	.name = "adp5520-backlight",
	378	.owner = THIS_MODULE,
14c1b778	379	.pm = &adp5520_bl_pm_ops,
a7998cec MH	380	},
a7998cec MH	381	.probe = adp5520_bl_probe,
d1723fa2	382	.remove = adp5520_bl_remove,
a7998cec MH	383	};
a7998cec MH	384
81178e02	385	module_platform_driver(adp5520_bl_driver);
a7998cec MH	386
	387	MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
	388	MODULE_DESCRIPTION("ADP5520(01) Backlight Driver");
	389	MODULE_LICENSE("GPL");
	390	MODULE_ALIAS("platform:adp5520-backlight");