[mirror_ubuntu-bionic-kernel.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>

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 = strict_strtoul(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);

	strict_strtoul(buf, 10, &data->cached_daylight_max);
	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 = kzalloc(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");
		kfree(data);
		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");
		kfree(data);
		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);
		kfree(data);
	}

	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);
	kfree(data);

	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		= __devexit_p(adp5520_bl_remove),
	.suspend	= adp5520_bl_suspend,
	.resume		= adp5520_bl_resume,
};

static int __init adp5520_bl_init(void)
{
	return platform_driver_register(&adp5520_bl_driver);
}
module_init(adp5520_bl_init);

static void __exit adp5520_bl_exit(void)
{
	platform_driver_unregister(&adp5520_bl_driver);
}
module_exit(adp5520_bl_exit);

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>
a7998cec MH	16
	17	struct adp5520_bl {
	18	struct device *master;
c24b6b6a	19	struct adp5520_backlight_platform_data *pdata;
a7998cec MH	20	struct mutex lock;
	21	unsigned long cached_daylight_max;
	22	int id;
	23	int current_brightness;
	24	};
	25
	26	static int adp5520_bl_set(struct backlight_device *bl, int brightness)
	27	{
	28	struct adp5520_bl *data = bl_get_data(bl);
	29	struct device *master = data->master;
	30	int ret = 0;
	31
	32	if (data->pdata->en_ambl_sens) {
	33	if ((brightness > 0) && (brightness < ADP5020_MAX_BRIGHTNESS)) {
	34	/* Disable Ambient Light auto adjust */
c24b6b6a MH	35	ret \|= adp5520_clr_bits(master, ADP5520_BL_CONTROL,
	36	ADP5520_BL_AUTO_ADJ);
	37	ret \|= adp5520_write(master, ADP5520_DAYLIGHT_MAX,
	38	brightness);
a7998cec MH	39	} else {
	40	/*
	41	* MAX_BRIGHTNESS -> Enable Ambient Light auto adjust
	42	* restore daylight l3 sysfs brightness
	43	*/
c24b6b6a	44	ret \|= adp5520_write(master, ADP5520_DAYLIGHT_MAX,
a7998cec	45	data->cached_daylight_max);
c24b6b6a MH	46	ret \|= adp5520_set_bits(master, ADP5520_BL_CONTROL,
c24b6b6a MH	47	ADP5520_BL_AUTO_ADJ);
a7998cec MH	48	}
a7998cec MH	49	} else {
c24b6b6a	50	ret \|= adp5520_write(master, ADP5520_DAYLIGHT_MAX, brightness);
a7998cec MH	51	}
	52
	53	if (data->current_brightness && brightness == 0)
	54	ret \|= adp5520_set_bits(master,
c24b6b6a	55	ADP5520_MODE_STATUS, ADP5520_DIM_EN);
a7998cec MH	56	else if (data->current_brightness == 0 && brightness)
a7998cec MH	57	ret \|= adp5520_clr_bits(master,
c24b6b6a	58	ADP5520_MODE_STATUS, ADP5520_DIM_EN);
a7998cec MH	59
	60	if (!ret)
	61	data->current_brightness = brightness;
	62
	63	return ret;
	64	}
	65
	66	static int adp5520_bl_update_status(struct backlight_device *bl)
	67	{
	68	int brightness = bl->props.brightness;
	69	if (bl->props.power != FB_BLANK_UNBLANK)
	70	brightness = 0;
	71
	72	if (bl->props.fb_blank != FB_BLANK_UNBLANK)
	73	brightness = 0;
	74
	75	return adp5520_bl_set(bl, brightness);
	76	}
	77
	78	static int adp5520_bl_get_brightness(struct backlight_device *bl)
	79	{
	80	struct adp5520_bl *data = bl_get_data(bl);
	81	int error;
	82	uint8_t reg_val;
	83
c24b6b6a	84	error = adp5520_read(data->master, ADP5520_BL_VALUE, &reg_val);
a7998cec MH	85
	86	return error ? data->current_brightness : reg_val;
	87	}
	88
9905a43b	89	static const struct backlight_ops adp5520_bl_ops = {
a7998cec MH	90	.update_status = adp5520_bl_update_status,
	91	.get_brightness = adp5520_bl_get_brightness,
	92	};
	93
	94	static int adp5520_bl_setup(struct backlight_device *bl)
	95	{
	96	struct adp5520_bl *data = bl_get_data(bl);
	97	struct device *master = data->master;
c24b6b6a	98	struct adp5520_backlight_platform_data *pdata = data->pdata;
a7998cec MH	99	int ret = 0;
a7998cec MH	100
c24b6b6a MH	101	ret \|= adp5520_write(master, ADP5520_DAYLIGHT_MAX,
	102	pdata->l1_daylight_max);
	103	ret \|= adp5520_write(master, ADP5520_DAYLIGHT_DIM,
	104	pdata->l1_daylight_dim);
a7998cec MH	105
	106	if (pdata->en_ambl_sens) {
	107	data->cached_daylight_max = pdata->l1_daylight_max;
c24b6b6a MH	108	ret \|= adp5520_write(master, ADP5520_OFFICE_MAX,
	109	pdata->l2_office_max);
	110	ret \|= adp5520_write(master, ADP5520_OFFICE_DIM,
	111	pdata->l2_office_dim);
	112	ret \|= adp5520_write(master, ADP5520_DARK_MAX,
	113	pdata->l3_dark_max);
	114	ret \|= adp5520_write(master, ADP5520_DARK_DIM,
	115	pdata->l3_dark_dim);
	116	ret \|= adp5520_write(master, ADP5520_L2_TRIP,
	117	pdata->l2_trip);
	118	ret \|= adp5520_write(master, ADP5520_L2_HYS,
	119	pdata->l2_hyst);
	120	ret \|= adp5520_write(master, ADP5520_L3_TRIP,
	121	pdata->l3_trip);
	122	ret \|= adp5520_write(master, ADP5520_L3_HYS,
	123	pdata->l3_hyst);
	124	ret \|= adp5520_write(master, ADP5520_ALS_CMPR_CFG,
	125	ALS_CMPR_CFG_VAL(pdata->abml_filt,
	126	ADP5520_L3_EN));
a7998cec MH	127	}
a7998cec MH	128
c24b6b6a MH	129	ret \|= adp5520_write(master, ADP5520_BL_CONTROL,
	130	BL_CTRL_VAL(pdata->fade_led_law,
	131	pdata->en_ambl_sens));
a7998cec	132
c24b6b6a	133	ret \|= adp5520_write(master, ADP5520_BL_FADE, FADE_VAL(pdata->fade_in,
a7998cec MH	134	pdata->fade_out));
a7998cec MH	135
c24b6b6a MH	136	ret \|= adp5520_set_bits(master, ADP5520_MODE_STATUS,
c24b6b6a MH	137	ADP5520_BL_EN \| ADP5520_DIM_EN);
a7998cec MH	138
	139	return ret;
	140	}
	141
	142	static ssize_t adp5520_show(struct device dev, char buf, int reg)
	143	{
	144	struct adp5520_bl *data = dev_get_drvdata(dev);
	145	int error;
	146	uint8_t reg_val;
	147
	148	mutex_lock(&data->lock);
	149	error = adp5520_read(data->master, reg, &reg_val);
	150	mutex_unlock(&data->lock);
	151
	152	return sprintf(buf, "%u\n", reg_val);
	153	}
	154
	155	static ssize_t adp5520_store(struct device dev, const char buf,
	156	size_t count, int reg)
	157	{
	158	struct adp5520_bl *data = dev_get_drvdata(dev);
	159	unsigned long val;
	160	int ret;
	161
	162	ret = strict_strtoul(buf, 10, &val);
	163	if (ret)
	164	return ret;
	165
	166	mutex_lock(&data->lock);
	167	adp5520_write(data->master, reg, val);
	168	mutex_unlock(&data->lock);
	169
	170	return count;
	171	}
	172
	173	static ssize_t adp5520_bl_dark_max_show(struct device *dev,
c24b6b6a	174	struct device_attribute attr, char buf)
a7998cec	175	{
c24b6b6a	176	return adp5520_show(dev, buf, ADP5520_DARK_MAX);
a7998cec MH	177	}
	178
	179	static ssize_t adp5520_bl_dark_max_store(struct device *dev,
c24b6b6a MH	180	struct device_attribute *attr,
c24b6b6a MH	181	const char *buf, size_t count)
a7998cec	182	{
c24b6b6a	183	return adp5520_store(dev, buf, count, ADP5520_DARK_MAX);
a7998cec MH	184	}
	185	static DEVICE_ATTR(dark_max, 0664, adp5520_bl_dark_max_show,
	186	adp5520_bl_dark_max_store);
	187
	188	static ssize_t adp5520_bl_office_max_show(struct device *dev,
c24b6b6a	189	struct device_attribute attr, char buf)
a7998cec	190	{
c24b6b6a	191	return adp5520_show(dev, buf, ADP5520_OFFICE_MAX);
a7998cec MH	192	}
	193
	194	static ssize_t adp5520_bl_office_max_store(struct device *dev,
c24b6b6a MH	195	struct device_attribute *attr,
c24b6b6a MH	196	const char *buf, size_t count)
a7998cec	197	{
c24b6b6a	198	return adp5520_store(dev, buf, count, ADP5520_OFFICE_MAX);
a7998cec MH	199	}
	200	static DEVICE_ATTR(office_max, 0664, adp5520_bl_office_max_show,
	201	adp5520_bl_office_max_store);
	202
	203	static ssize_t adp5520_bl_daylight_max_show(struct device *dev,
	204	struct device_attribute attr, char buf)
	205	{
c24b6b6a	206	return adp5520_show(dev, buf, ADP5520_DAYLIGHT_MAX);
a7998cec MH	207	}
	208
	209	static ssize_t adp5520_bl_daylight_max_store(struct device *dev,
c24b6b6a MH	210	struct device_attribute *attr,
c24b6b6a MH	211	const char *buf, size_t count)
a7998cec MH	212	{
	213	struct adp5520_bl *data = dev_get_drvdata(dev);
	214
	215	strict_strtoul(buf, 10, &data->cached_daylight_max);
c24b6b6a	216	return adp5520_store(dev, buf, count, ADP5520_DAYLIGHT_MAX);
a7998cec MH	217	}
	218	static DEVICE_ATTR(daylight_max, 0664, adp5520_bl_daylight_max_show,
	219	adp5520_bl_daylight_max_store);
	220
	221	static ssize_t adp5520_bl_dark_dim_show(struct device *dev,
	222	struct device_attribute attr, char buf)
	223	{
c24b6b6a	224	return adp5520_show(dev, buf, ADP5520_DARK_DIM);
a7998cec MH	225	}
	226
	227	static ssize_t adp5520_bl_dark_dim_store(struct device *dev,
c24b6b6a MH	228	struct device_attribute *attr,
c24b6b6a MH	229	const char *buf, size_t count)
a7998cec	230	{
c24b6b6a	231	return adp5520_store(dev, buf, count, ADP5520_DARK_DIM);
a7998cec MH	232	}
	233	static DEVICE_ATTR(dark_dim, 0664, adp5520_bl_dark_dim_show,
	234	adp5520_bl_dark_dim_store);
	235
	236	static ssize_t adp5520_bl_office_dim_show(struct device *dev,
	237	struct device_attribute attr, char buf)
	238	{
c24b6b6a	239	return adp5520_show(dev, buf, ADP5520_OFFICE_DIM);
a7998cec MH	240	}
	241
	242	static ssize_t adp5520_bl_office_dim_store(struct device *dev,
c24b6b6a MH	243	struct device_attribute *attr,
c24b6b6a MH	244	const char *buf, size_t count)
a7998cec	245	{
c24b6b6a	246	return adp5520_store(dev, buf, count, ADP5520_OFFICE_DIM);
a7998cec MH	247	}
	248	static DEVICE_ATTR(office_dim, 0664, adp5520_bl_office_dim_show,
	249	adp5520_bl_office_dim_store);
	250
	251	static ssize_t adp5520_bl_daylight_dim_show(struct device *dev,
c24b6b6a	252	struct device_attribute attr, char buf)
a7998cec	253	{
c24b6b6a	254	return adp5520_show(dev, buf, ADP5520_DAYLIGHT_DIM);
a7998cec MH	255	}
	256
	257	static ssize_t adp5520_bl_daylight_dim_store(struct device *dev,
c24b6b6a MH	258	struct device_attribute *attr,
c24b6b6a MH	259	const char *buf, size_t count)
a7998cec	260	{
c24b6b6a	261	return adp5520_store(dev, buf, count, ADP5520_DAYLIGHT_DIM);
a7998cec MH	262	}
	263	static DEVICE_ATTR(daylight_dim, 0664, adp5520_bl_daylight_dim_show,
	264	adp5520_bl_daylight_dim_store);
	265
	266	static struct attribute *adp5520_bl_attributes[] = {
	267	&dev_attr_dark_max.attr,
	268	&dev_attr_dark_dim.attr,
	269	&dev_attr_office_max.attr,
	270	&dev_attr_office_dim.attr,
	271	&dev_attr_daylight_max.attr,
	272	&dev_attr_daylight_dim.attr,
	273	NULL
	274	};
	275
	276	static const struct attribute_group adp5520_bl_attr_group = {
	277	.attrs = adp5520_bl_attributes,
	278	};
	279
	280	static int __devinit adp5520_bl_probe(struct platform_device *pdev)
	281	{
a19a6ee6	282	struct backlight_properties props;
a7998cec MH	283	struct backlight_device *bl;
	284	struct adp5520_bl *data;
	285	int ret = 0;
	286
	287	data = kzalloc(sizeof(*data), GFP_KERNEL);
	288	if (data == NULL)
	289	return -ENOMEM;
	290
	291	data->master = pdev->dev.parent;
	292	data->pdata = pdev->dev.platform_data;
	293
	294	if (data->pdata == NULL) {
	295	dev_err(&pdev->dev, "missing platform data\n");
	296	kfree(data);
	297	return -ENODEV;
	298	}
	299
	300	data->id = pdev->id;
	301	data->current_brightness = 0;
	302
	303	mutex_init(&data->lock);
	304
a19a6ee6	305	memset(&props, 0, sizeof(struct backlight_properties));
bb7ca747	306	props.type = BACKLIGHT_RAW;
a19a6ee6 MG	307	props.max_brightness = ADP5020_MAX_BRIGHTNESS;
	308	bl = backlight_device_register(pdev->name, data->master, data,
	309	&adp5520_bl_ops, &props);
a7998cec MH	310	if (IS_ERR(bl)) {
	311	dev_err(&pdev->dev, "failed to register backlight\n");
	312	kfree(data);
	313	return PTR_ERR(bl);
	314	}
	315
a19a6ee6	316	bl->props.brightness = ADP5020_MAX_BRIGHTNESS;
a7998cec MH	317	if (data->pdata->en_ambl_sens)
	318	ret = sysfs_create_group(&bl->dev.kobj,
	319	&adp5520_bl_attr_group);
	320
	321	if (ret) {
	322	dev_err(&pdev->dev, "failed to register sysfs\n");
	323	backlight_device_unregister(bl);
	324	kfree(data);
	325	}
	326
	327	platform_set_drvdata(pdev, bl);
	328	ret \|= adp5520_bl_setup(bl);
	329	backlight_update_status(bl);
	330
	331	return ret;
	332	}
	333
	334	static int __devexit adp5520_bl_remove(struct platform_device *pdev)
	335	{
	336	struct backlight_device *bl = platform_get_drvdata(pdev);
	337	struct adp5520_bl *data = bl_get_data(bl);
	338
c24b6b6a	339	adp5520_clr_bits(data->master, ADP5520_MODE_STATUS, ADP5520_BL_EN);
a7998cec MH	340
	341	if (data->pdata->en_ambl_sens)
	342	sysfs_remove_group(&bl->dev.kobj,
	343	&adp5520_bl_attr_group);
	344
	345	backlight_device_unregister(bl);
	346	kfree(data);
	347
	348	return 0;
	349	}
	350
	351	#ifdef CONFIG_PM
	352	static int adp5520_bl_suspend(struct platform_device *pdev,
	353	pm_message_t state)
	354	{
	355	struct backlight_device *bl = platform_get_drvdata(pdev);
	356	return adp5520_bl_set(bl, 0);
	357	}
	358
	359	static int adp5520_bl_resume(struct platform_device *pdev)
	360	{
	361	struct backlight_device *bl = platform_get_drvdata(pdev);
	362
	363	backlight_update_status(bl);
	364	return 0;
	365	}
	366	#else
	367	#define adp5520_bl_suspend NULL
	368	#define adp5520_bl_resume NULL
	369	#endif
	370
	371	static struct platform_driver adp5520_bl_driver = {
	372	.driver = {
	373	.name = "adp5520-backlight",
	374	.owner = THIS_MODULE,
	375	},
	376	.probe = adp5520_bl_probe,
	377	.remove = __devexit_p(adp5520_bl_remove),
	378	.suspend = adp5520_bl_suspend,
	379	.resume = adp5520_bl_resume,
	380	};
	381
	382	static int __init adp5520_bl_init(void)
	383	{
	384	return platform_driver_register(&adp5520_bl_driver);
	385	}
	386	module_init(adp5520_bl_init);
	387
	388	static void __exit adp5520_bl_exit(void)
	389	{
	390	platform_driver_unregister(&adp5520_bl_driver);
	391	}
	392	module_exit(adp5520_bl_exit);
	393
	394	MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
	395	MODULE_DESCRIPTION("ADP5520(01) Backlight Driver");
	396	MODULE_LICENSE("GPL");
	397	MODULE_ALIAS("platform:adp5520-backlight");