[deliverable/linux.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);
	int ret;

	ret = strict_strtoul(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 = 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	{
a7998cec MH	213	struct adp5520_bl *data = dev_get_drvdata(dev);
877947bc LY	214	int ret;
	215
	216	ret = strict_strtoul(buf, 10, &data->cached_daylight_max);
	217	if (ret < 0)
	218	return ret;
a7998cec	219
c24b6b6a	220	return adp5520_store(dev, buf, count, ADP5520_DAYLIGHT_MAX);
a7998cec MH	221	}
	222	static DEVICE_ATTR(daylight_max, 0664, adp5520_bl_daylight_max_show,
	223	adp5520_bl_daylight_max_store);
	224
	225	static ssize_t adp5520_bl_dark_dim_show(struct device *dev,
	226	struct device_attribute attr, char buf)
	227	{
c24b6b6a	228	return adp5520_show(dev, buf, ADP5520_DARK_DIM);
a7998cec MH	229	}
	230
	231	static ssize_t adp5520_bl_dark_dim_store(struct device *dev,
c24b6b6a MH	232	struct device_attribute *attr,
c24b6b6a MH	233	const char *buf, size_t count)
a7998cec	234	{
c24b6b6a	235	return adp5520_store(dev, buf, count, ADP5520_DARK_DIM);
a7998cec MH	236	}
	237	static DEVICE_ATTR(dark_dim, 0664, adp5520_bl_dark_dim_show,
	238	adp5520_bl_dark_dim_store);
	239
	240	static ssize_t adp5520_bl_office_dim_show(struct device *dev,
	241	struct device_attribute attr, char buf)
	242	{
c24b6b6a	243	return adp5520_show(dev, buf, ADP5520_OFFICE_DIM);
a7998cec MH	244	}
	245
	246	static ssize_t adp5520_bl_office_dim_store(struct device *dev,
c24b6b6a MH	247	struct device_attribute *attr,
c24b6b6a MH	248	const char *buf, size_t count)
a7998cec	249	{
c24b6b6a	250	return adp5520_store(dev, buf, count, ADP5520_OFFICE_DIM);
a7998cec MH	251	}
	252	static DEVICE_ATTR(office_dim, 0664, adp5520_bl_office_dim_show,
	253	adp5520_bl_office_dim_store);
	254
	255	static ssize_t adp5520_bl_daylight_dim_show(struct device *dev,
c24b6b6a	256	struct device_attribute attr, char buf)
a7998cec	257	{
c24b6b6a	258	return adp5520_show(dev, buf, ADP5520_DAYLIGHT_DIM);
a7998cec MH	259	}
	260
	261	static ssize_t adp5520_bl_daylight_dim_store(struct device *dev,
c24b6b6a MH	262	struct device_attribute *attr,
c24b6b6a MH	263	const char *buf, size_t count)
a7998cec	264	{
c24b6b6a	265	return adp5520_store(dev, buf, count, ADP5520_DAYLIGHT_DIM);
a7998cec MH	266	}
	267	static DEVICE_ATTR(daylight_dim, 0664, adp5520_bl_daylight_dim_show,
	268	adp5520_bl_daylight_dim_store);
	269
	270	static struct attribute *adp5520_bl_attributes[] = {
	271	&dev_attr_dark_max.attr,
	272	&dev_attr_dark_dim.attr,
	273	&dev_attr_office_max.attr,
	274	&dev_attr_office_dim.attr,
	275	&dev_attr_daylight_max.attr,
	276	&dev_attr_daylight_dim.attr,
	277	NULL
	278	};
	279
	280	static const struct attribute_group adp5520_bl_attr_group = {
	281	.attrs = adp5520_bl_attributes,
	282	};
	283
	284	static int __devinit adp5520_bl_probe(struct platform_device *pdev)
	285	{
a19a6ee6	286	struct backlight_properties props;
a7998cec MH	287	struct backlight_device *bl;
	288	struct adp5520_bl *data;
	289	int ret = 0;
	290
	291	data = kzalloc(sizeof(*data), GFP_KERNEL);
	292	if (data == NULL)
	293	return -ENOMEM;
	294
	295	data->master = pdev->dev.parent;
	296	data->pdata = pdev->dev.platform_data;
	297
	298	if (data->pdata == NULL) {
	299	dev_err(&pdev->dev, "missing platform data\n");
	300	kfree(data);
	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)) {
	315	dev_err(&pdev->dev, "failed to register backlight\n");
	316	kfree(data);
	317	return PTR_ERR(bl);
	318	}
	319
a19a6ee6	320	bl->props.brightness = ADP5020_MAX_BRIGHTNESS;
a7998cec MH	321	if (data->pdata->en_ambl_sens)
	322	ret = sysfs_create_group(&bl->dev.kobj,
	323	&adp5520_bl_attr_group);
	324
	325	if (ret) {
	326	dev_err(&pdev->dev, "failed to register sysfs\n");
	327	backlight_device_unregister(bl);
	328	kfree(data);
	329	}
	330
	331	platform_set_drvdata(pdev, bl);
	332	ret \|= adp5520_bl_setup(bl);
	333	backlight_update_status(bl);
	334
	335	return ret;
	336	}
	337
	338	static int __devexit adp5520_bl_remove(struct platform_device *pdev)
	339	{
	340	struct backlight_device *bl = platform_get_drvdata(pdev);
	341	struct adp5520_bl *data = bl_get_data(bl);
	342
c24b6b6a	343	adp5520_clr_bits(data->master, ADP5520_MODE_STATUS, ADP5520_BL_EN);
a7998cec MH	344
	345	if (data->pdata->en_ambl_sens)
	346	sysfs_remove_group(&bl->dev.kobj,
	347	&adp5520_bl_attr_group);
	348
	349	backlight_device_unregister(bl);
	350	kfree(data);
	351
	352	return 0;
	353	}
	354
	355	#ifdef CONFIG_PM
	356	static int adp5520_bl_suspend(struct platform_device *pdev,
	357	pm_message_t state)
	358	{
	359	struct backlight_device *bl = platform_get_drvdata(pdev);
	360	return adp5520_bl_set(bl, 0);
	361	}
	362
	363	static int adp5520_bl_resume(struct platform_device *pdev)
	364	{
	365	struct backlight_device *bl = platform_get_drvdata(pdev);
	366
	367	backlight_update_status(bl);
	368	return 0;
	369	}
	370	#else
	371	#define adp5520_bl_suspend NULL
	372	#define adp5520_bl_resume NULL
	373	#endif
	374
	375	static struct platform_driver adp5520_bl_driver = {
	376	.driver = {
	377	.name = "adp5520-backlight",
	378	.owner = THIS_MODULE,
	379	},
	380	.probe = adp5520_bl_probe,
	381	.remove = __devexit_p(adp5520_bl_remove),
	382	.suspend = adp5520_bl_suspend,
	383	.resume = adp5520_bl_resume,
	384	};
	385
	386	static int __init adp5520_bl_init(void)
	387	{
	388	return platform_driver_register(&adp5520_bl_driver);
	389	}
	390	module_init(adp5520_bl_init);
	391
	392	static void __exit adp5520_bl_exit(void)
	393	{
	394	platform_driver_unregister(&adp5520_bl_driver);
	395	}
	396	module_exit(adp5520_bl_exit);
	397
	398	MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
	399	MODULE_DESCRIPTION("ADP5520(01) Backlight Driver");
	400	MODULE_LICENSE("GPL");
	401	MODULE_ALIAS("platform:adp5520-backlight");