[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>
#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 = dev_get_platdata(&pdev->dev);

	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 = devm_backlight_device_register(&pdev->dev, 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");
		return ret;
	}

	platform_set_drvdata(pdev, bl);
	ret = adp5520_bl_setup(bl);
	if (ret) {
		dev_err(&pdev->dev, "failed to setup\n");
		if (data->pdata->en_ambl_sens)
			sysfs_remove_group(&bl->dev.kobj,
					&adp5520_bl_attr_group);
		return ret;
	}

	backlight_update_status(bl);

	return 0;
}

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);

	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",
		.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;
f9bda39d	70
a7998cec MH	71	if (bl->props.power != FB_BLANK_UNBLANK)
	72	brightness = 0;
	73
	74	if (bl->props.fb_blank != FB_BLANK_UNBLANK)
	75	brightness = 0;
	76
	77	return adp5520_bl_set(bl, brightness);
	78	}
	79
	80	static int adp5520_bl_get_brightness(struct backlight_device *bl)
	81	{
	82	struct adp5520_bl *data = bl_get_data(bl);
	83	int error;
	84	uint8_t reg_val;
	85
c24b6b6a	86	error = adp5520_read(data->master, ADP5520_BL_VALUE, &reg_val);
a7998cec MH	87
	88	return error ? data->current_brightness : reg_val;
	89	}
	90
9905a43b	91	static const struct backlight_ops adp5520_bl_ops = {
a7998cec MH	92	.update_status = adp5520_bl_update_status,
	93	.get_brightness = adp5520_bl_get_brightness,
	94	};
	95
	96	static int adp5520_bl_setup(struct backlight_device *bl)
	97	{
	98	struct adp5520_bl *data = bl_get_data(bl);
	99	struct device *master = data->master;
c24b6b6a	100	struct adp5520_backlight_platform_data *pdata = data->pdata;
a7998cec MH	101	int ret = 0;
a7998cec MH	102
c24b6b6a MH	103	ret \|= adp5520_write(master, ADP5520_DAYLIGHT_MAX,
	104	pdata->l1_daylight_max);
	105	ret \|= adp5520_write(master, ADP5520_DAYLIGHT_DIM,
	106	pdata->l1_daylight_dim);
a7998cec MH	107
	108	if (pdata->en_ambl_sens) {
	109	data->cached_daylight_max = pdata->l1_daylight_max;
c24b6b6a MH	110	ret \|= adp5520_write(master, ADP5520_OFFICE_MAX,
	111	pdata->l2_office_max);
	112	ret \|= adp5520_write(master, ADP5520_OFFICE_DIM,
	113	pdata->l2_office_dim);
	114	ret \|= adp5520_write(master, ADP5520_DARK_MAX,
	115	pdata->l3_dark_max);
	116	ret \|= adp5520_write(master, ADP5520_DARK_DIM,
	117	pdata->l3_dark_dim);
	118	ret \|= adp5520_write(master, ADP5520_L2_TRIP,
	119	pdata->l2_trip);
	120	ret \|= adp5520_write(master, ADP5520_L2_HYS,
	121	pdata->l2_hyst);
	122	ret \|= adp5520_write(master, ADP5520_L3_TRIP,
	123	pdata->l3_trip);
	124	ret \|= adp5520_write(master, ADP5520_L3_HYS,
	125	pdata->l3_hyst);
	126	ret \|= adp5520_write(master, ADP5520_ALS_CMPR_CFG,
	127	ALS_CMPR_CFG_VAL(pdata->abml_filt,
	128	ADP5520_L3_EN));
a7998cec MH	129	}
a7998cec MH	130
c24b6b6a MH	131	ret \|= adp5520_write(master, ADP5520_BL_CONTROL,
	132	BL_CTRL_VAL(pdata->fade_led_law,
	133	pdata->en_ambl_sens));
a7998cec	134
c24b6b6a	135	ret \|= adp5520_write(master, ADP5520_BL_FADE, FADE_VAL(pdata->fade_in,
a7998cec MH	136	pdata->fade_out));
a7998cec MH	137
c24b6b6a MH	138	ret \|= adp5520_set_bits(master, ADP5520_MODE_STATUS,
c24b6b6a MH	139	ADP5520_BL_EN \| ADP5520_DIM_EN);
a7998cec MH	140
	141	return ret;
	142	}
	143
	144	static ssize_t adp5520_show(struct device dev, char buf, int reg)
	145	{
	146	struct adp5520_bl *data = dev_get_drvdata(dev);
359177e0	147	int ret;
a7998cec MH	148	uint8_t reg_val;
	149
	150	mutex_lock(&data->lock);
359177e0	151	ret = adp5520_read(data->master, reg, &reg_val);
a7998cec MH	152	mutex_unlock(&data->lock);
a7998cec MH	153
359177e0 DN	154	if (ret < 0)
	155	return ret;
	156
a7998cec MH	157	return sprintf(buf, "%u\n", reg_val);
	158	}
	159
	160	static ssize_t adp5520_store(struct device dev, const char buf,
	161	size_t count, int reg)
	162	{
	163	struct adp5520_bl *data = dev_get_drvdata(dev);
	164	unsigned long val;
	165	int ret;
	166
71d7225c	167	ret = kstrtoul(buf, 10, &val);
a7998cec MH	168	if (ret)
	169	return ret;
	170
	171	mutex_lock(&data->lock);
	172	adp5520_write(data->master, reg, val);
	173	mutex_unlock(&data->lock);
	174
	175	return count;
	176	}
	177
	178	static ssize_t adp5520_bl_dark_max_show(struct device *dev,
c24b6b6a	179	struct device_attribute attr, char buf)
a7998cec	180	{
c24b6b6a	181	return adp5520_show(dev, buf, ADP5520_DARK_MAX);
a7998cec MH	182	}
	183
	184	static ssize_t adp5520_bl_dark_max_store(struct device *dev,
c24b6b6a MH	185	struct device_attribute *attr,
c24b6b6a MH	186	const char *buf, size_t count)
a7998cec	187	{
c24b6b6a	188	return adp5520_store(dev, buf, count, ADP5520_DARK_MAX);
a7998cec MH	189	}
	190	static DEVICE_ATTR(dark_max, 0664, adp5520_bl_dark_max_show,
	191	adp5520_bl_dark_max_store);
	192
	193	static ssize_t adp5520_bl_office_max_show(struct device *dev,
c24b6b6a	194	struct device_attribute attr, char buf)
a7998cec	195	{
c24b6b6a	196	return adp5520_show(dev, buf, ADP5520_OFFICE_MAX);
a7998cec MH	197	}
	198
	199	static ssize_t adp5520_bl_office_max_store(struct device *dev,
c24b6b6a MH	200	struct device_attribute *attr,
c24b6b6a MH	201	const char *buf, size_t count)
a7998cec	202	{
c24b6b6a	203	return adp5520_store(dev, buf, count, ADP5520_OFFICE_MAX);
a7998cec MH	204	}
	205	static DEVICE_ATTR(office_max, 0664, adp5520_bl_office_max_show,
	206	adp5520_bl_office_max_store);
	207
	208	static ssize_t adp5520_bl_daylight_max_show(struct device *dev,
	209	struct device_attribute attr, char buf)
	210	{
c24b6b6a	211	return adp5520_show(dev, buf, ADP5520_DAYLIGHT_MAX);
a7998cec MH	212	}
	213
	214	static ssize_t adp5520_bl_daylight_max_store(struct device *dev,
c24b6b6a MH	215	struct device_attribute *attr,
c24b6b6a MH	216	const char *buf, size_t count)
a7998cec MH	217	{
a7998cec MH	218	struct adp5520_bl *data = dev_get_drvdata(dev);
877947bc LY	219	int ret;
877947bc LY	220
71d7225c	221	ret = kstrtoul(buf, 10, &data->cached_daylight_max);
877947bc LY	222	if (ret < 0)
877947bc LY	223	return ret;
a7998cec	224
c24b6b6a	225	return adp5520_store(dev, buf, count, ADP5520_DAYLIGHT_MAX);
a7998cec MH	226	}
	227	static DEVICE_ATTR(daylight_max, 0664, adp5520_bl_daylight_max_show,
	228	adp5520_bl_daylight_max_store);
	229
	230	static ssize_t adp5520_bl_dark_dim_show(struct device *dev,
	231	struct device_attribute attr, char buf)
	232	{
c24b6b6a	233	return adp5520_show(dev, buf, ADP5520_DARK_DIM);
a7998cec MH	234	}
	235
	236	static ssize_t adp5520_bl_dark_dim_store(struct device *dev,
c24b6b6a MH	237	struct device_attribute *attr,
c24b6b6a MH	238	const char *buf, size_t count)
a7998cec	239	{
c24b6b6a	240	return adp5520_store(dev, buf, count, ADP5520_DARK_DIM);
a7998cec MH	241	}
	242	static DEVICE_ATTR(dark_dim, 0664, adp5520_bl_dark_dim_show,
	243	adp5520_bl_dark_dim_store);
	244
	245	static ssize_t adp5520_bl_office_dim_show(struct device *dev,
	246	struct device_attribute attr, char buf)
	247	{
c24b6b6a	248	return adp5520_show(dev, buf, ADP5520_OFFICE_DIM);
a7998cec MH	249	}
	250
	251	static ssize_t adp5520_bl_office_dim_store(struct device *dev,
c24b6b6a MH	252	struct device_attribute *attr,
c24b6b6a MH	253	const char *buf, size_t count)
a7998cec	254	{
c24b6b6a	255	return adp5520_store(dev, buf, count, ADP5520_OFFICE_DIM);
a7998cec MH	256	}
	257	static DEVICE_ATTR(office_dim, 0664, adp5520_bl_office_dim_show,
	258	adp5520_bl_office_dim_store);
	259
	260	static ssize_t adp5520_bl_daylight_dim_show(struct device *dev,
c24b6b6a	261	struct device_attribute attr, char buf)
a7998cec	262	{
c24b6b6a	263	return adp5520_show(dev, buf, ADP5520_DAYLIGHT_DIM);
a7998cec MH	264	}
	265
	266	static ssize_t adp5520_bl_daylight_dim_store(struct device *dev,
c24b6b6a MH	267	struct device_attribute *attr,
c24b6b6a MH	268	const char *buf, size_t count)
a7998cec	269	{
c24b6b6a	270	return adp5520_store(dev, buf, count, ADP5520_DAYLIGHT_DIM);
a7998cec MH	271	}
	272	static DEVICE_ATTR(daylight_dim, 0664, adp5520_bl_daylight_dim_show,
	273	adp5520_bl_daylight_dim_store);
	274
	275	static struct attribute *adp5520_bl_attributes[] = {
	276	&dev_attr_dark_max.attr,
	277	&dev_attr_dark_dim.attr,
	278	&dev_attr_office_max.attr,
	279	&dev_attr_office_dim.attr,
	280	&dev_attr_daylight_max.attr,
	281	&dev_attr_daylight_dim.attr,
	282	NULL
	283	};
	284
	285	static const struct attribute_group adp5520_bl_attr_group = {
	286	.attrs = adp5520_bl_attributes,
	287	};
	288
1b9e450d	289	static int adp5520_bl_probe(struct platform_device *pdev)
a7998cec	290	{
a19a6ee6	291	struct backlight_properties props;
a7998cec MH	292	struct backlight_device *bl;
	293	struct adp5520_bl *data;
	294	int ret = 0;
	295
050ea48b	296	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
a7998cec MH	297	if (data == NULL)
	298	return -ENOMEM;
	299
	300	data->master = pdev->dev.parent;
c512794c	301	data->pdata = dev_get_platdata(&pdev->dev);
a7998cec MH	302
	303	if (data->pdata == NULL) {
	304	dev_err(&pdev->dev, "missing platform data\n");
a7998cec MH	305	return -ENODEV;
	306	}
	307
	308	data->id = pdev->id;
	309	data->current_brightness = 0;
	310
	311	mutex_init(&data->lock);
	312
a19a6ee6	313	memset(&props, 0, sizeof(struct backlight_properties));
bb7ca747	314	props.type = BACKLIGHT_RAW;
a19a6ee6	315	props.max_brightness = ADP5020_MAX_BRIGHTNESS;
5f652c71 JH	316	bl = devm_backlight_device_register(&pdev->dev, pdev->name,
	317	data->master, data, &adp5520_bl_ops,
	318	&props);
a7998cec MH	319	if (IS_ERR(bl)) {
a7998cec MH	320	dev_err(&pdev->dev, "failed to register backlight\n");
a7998cec MH	321	return PTR_ERR(bl);
	322	}
	323
a19a6ee6	324	bl->props.brightness = ADP5020_MAX_BRIGHTNESS;
a7998cec MH	325	if (data->pdata->en_ambl_sens)
	326	ret = sysfs_create_group(&bl->dev.kobj,
	327	&adp5520_bl_attr_group);
	328
	329	if (ret) {
	330	dev_err(&pdev->dev, "failed to register sysfs\n");
5f652c71	331	return ret;
a7998cec MH	332	}
	333
	334	platform_set_drvdata(pdev, bl);
0eb3fba8 AK	335	ret = adp5520_bl_setup(bl);
	336	if (ret) {
	337	dev_err(&pdev->dev, "failed to setup\n");
	338	if (data->pdata->en_ambl_sens)
	339	sysfs_remove_group(&bl->dev.kobj,
	340	&adp5520_bl_attr_group);
	341	return ret;
	342	}
	343
a7998cec MH	344	backlight_update_status(bl);
a7998cec MH	345
0eb3fba8	346	return 0;
a7998cec MH	347	}
a7998cec MH	348
7e4b9d0b	349	static int adp5520_bl_remove(struct platform_device *pdev)
a7998cec MH	350	{
	351	struct backlight_device *bl = platform_get_drvdata(pdev);
	352	struct adp5520_bl *data = bl_get_data(bl);
	353
c24b6b6a	354	adp5520_clr_bits(data->master, ADP5520_MODE_STATUS, ADP5520_BL_EN);
a7998cec MH	355
	356	if (data->pdata->en_ambl_sens)
	357	sysfs_remove_group(&bl->dev.kobj,
	358	&adp5520_bl_attr_group);
	359
a7998cec MH	360	return 0;
	361	}
	362
14c1b778 JH	363	#ifdef CONFIG_PM_SLEEP
14c1b778 JH	364	static int adp5520_bl_suspend(struct device *dev)
a7998cec	365	{
14c1b778 JH	366	struct backlight_device *bl = dev_get_drvdata(dev);
14c1b778 JH	367
a7998cec MH	368	return adp5520_bl_set(bl, 0);
	369	}
	370
14c1b778	371	static int adp5520_bl_resume(struct device *dev)
a7998cec	372	{
14c1b778	373	struct backlight_device *bl = dev_get_drvdata(dev);
a7998cec MH	374
	375	backlight_update_status(bl);
	376	return 0;
	377	}
a7998cec MH	378	#endif
a7998cec MH	379
14c1b778 JH	380	static SIMPLE_DEV_PM_OPS(adp5520_bl_pm_ops, adp5520_bl_suspend,
	381	adp5520_bl_resume);
	382
a7998cec MH	383	static struct platform_driver adp5520_bl_driver = {
	384	.driver = {
	385	.name = "adp5520-backlight",
14c1b778	386	.pm = &adp5520_bl_pm_ops,
a7998cec MH	387	},
a7998cec MH	388	.probe = adp5520_bl_probe,
d1723fa2	389	.remove = adp5520_bl_remove,
a7998cec MH	390	};
a7998cec MH	391
81178e02	392	module_platform_driver(adp5520_bl_driver);
a7998cec MH	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");