[linux.git] / drivers / video / backlight / lm3533_bl.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * lm3533-bl.c -- LM3533 Backlight driver
 *
 * Copyright (C) 2011-2012 Texas Instruments
 *
 * Author: Johan Hovold <[email protected]>
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/backlight.h>
#include <linux/slab.h>

#include <linux/mfd/lm3533.h>


#define LM3533_HVCTRLBANK_COUNT		2
#define LM3533_BL_MAX_BRIGHTNESS	255

#define LM3533_REG_CTRLBANK_AB_BCONF	0x1a


struct lm3533_bl {
	struct lm3533 *lm3533;
	struct lm3533_ctrlbank cb;
	struct backlight_device *bd;
	int id;
};


static inline int lm3533_bl_get_ctrlbank_id(struct lm3533_bl *bl)
{
	return bl->id;
}

static int lm3533_bl_update_status(struct backlight_device *bd)
{
	struct lm3533_bl *bl = bl_get_data(bd);

	return lm3533_ctrlbank_set_brightness(&bl->cb, backlight_get_brightness(bd));
}

static int lm3533_bl_get_brightness(struct backlight_device *bd)
{
	struct lm3533_bl *bl = bl_get_data(bd);
	u8 val;
	int ret;

	ret = lm3533_ctrlbank_get_brightness(&bl->cb, &val);
	if (ret)
		return ret;

	return val;
}

static const struct backlight_ops lm3533_bl_ops = {
	.get_brightness	= lm3533_bl_get_brightness,
	.update_status	= lm3533_bl_update_status,
};

static ssize_t show_id(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct lm3533_bl *bl = dev_get_drvdata(dev);

	return scnprintf(buf, PAGE_SIZE, "%d\n", bl->id);
}

static ssize_t show_als_channel(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct lm3533_bl *bl = dev_get_drvdata(dev);
	unsigned channel = lm3533_bl_get_ctrlbank_id(bl);

	return scnprintf(buf, PAGE_SIZE, "%u\n", channel);
}

static ssize_t show_als_en(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct lm3533_bl *bl = dev_get_drvdata(dev);
	int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
	u8 val;
	u8 mask;
	bool enable;
	int ret;

	ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val);
	if (ret)
		return ret;

	mask = 1 << (2 * ctrlbank);
	enable = val & mask;

	return scnprintf(buf, PAGE_SIZE, "%d\n", enable);
}

static ssize_t store_als_en(struct device *dev,
					struct device_attribute *attr,
					const char *buf, size_t len)
{
	struct lm3533_bl *bl = dev_get_drvdata(dev);
	int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
	int enable;
	u8 val;
	u8 mask;
	int ret;

	if (kstrtoint(buf, 0, &enable))
		return -EINVAL;

	mask = 1 << (2 * ctrlbank);

	if (enable)
		val = mask;
	else
		val = 0;

	ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val,
									mask);
	if (ret)
		return ret;

	return len;
}

static ssize_t show_linear(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct lm3533_bl *bl = dev_get_drvdata(dev);
	u8 val;
	u8 mask;
	int linear;
	int ret;

	ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val);
	if (ret)
		return ret;

	mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1);

	if (val & mask)
		linear = 1;
	else
		linear = 0;

	return scnprintf(buf, PAGE_SIZE, "%x\n", linear);
}

static ssize_t store_linear(struct device *dev,
					struct device_attribute *attr,
					const char *buf, size_t len)
{
	struct lm3533_bl *bl = dev_get_drvdata(dev);
	unsigned long linear;
	u8 mask;
	u8 val;
	int ret;

	if (kstrtoul(buf, 0, &linear))
		return -EINVAL;

	mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1);

	if (linear)
		val = mask;
	else
		val = 0;

	ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val,
									mask);
	if (ret)
		return ret;

	return len;
}

static ssize_t show_pwm(struct device *dev,
					struct device_attribute *attr,
					char *buf)
{
	struct lm3533_bl *bl = dev_get_drvdata(dev);
	u8 val;
	int ret;

	ret = lm3533_ctrlbank_get_pwm(&bl->cb, &val);
	if (ret)
		return ret;

	return scnprintf(buf, PAGE_SIZE, "%u\n", val);
}

static ssize_t store_pwm(struct device *dev,
					struct device_attribute *attr,
					const char *buf, size_t len)
{
	struct lm3533_bl *bl = dev_get_drvdata(dev);
	u8 val;
	int ret;

	if (kstrtou8(buf, 0, &val))
		return -EINVAL;

	ret = lm3533_ctrlbank_set_pwm(&bl->cb, val);
	if (ret)
		return ret;

	return len;
}

static LM3533_ATTR_RO(als_channel);
static LM3533_ATTR_RW(als_en);
static LM3533_ATTR_RO(id);
static LM3533_ATTR_RW(linear);
static LM3533_ATTR_RW(pwm);

static struct attribute *lm3533_bl_attributes[] = {
	&dev_attr_als_channel.attr,
	&dev_attr_als_en.attr,
	&dev_attr_id.attr,
	&dev_attr_linear.attr,
	&dev_attr_pwm.attr,
	NULL,
};

static umode_t lm3533_bl_attr_is_visible(struct kobject *kobj,
					     struct attribute *attr, int n)
{
	struct device *dev = kobj_to_dev(kobj);
	struct lm3533_bl *bl = dev_get_drvdata(dev);
	umode_t mode = attr->mode;

	if (attr == &dev_attr_als_channel.attr ||
					attr == &dev_attr_als_en.attr) {
		if (!bl->lm3533->have_als)
			mode = 0;
	}

	return mode;
};

static struct attribute_group lm3533_bl_attribute_group = {
	.is_visible	= lm3533_bl_attr_is_visible,
	.attrs		= lm3533_bl_attributes
};

static int lm3533_bl_setup(struct lm3533_bl *bl,
					struct lm3533_bl_platform_data *pdata)
{
	int ret;

	ret = lm3533_ctrlbank_set_max_current(&bl->cb, pdata->max_current);
	if (ret)
		return ret;

	return lm3533_ctrlbank_set_pwm(&bl->cb, pdata->pwm);
}

static int lm3533_bl_probe(struct platform_device *pdev)
{
	struct lm3533 *lm3533;
	struct lm3533_bl_platform_data *pdata;
	struct lm3533_bl *bl;
	struct backlight_device *bd;
	struct backlight_properties props;
	int ret;

	dev_dbg(&pdev->dev, "%s\n", __func__);

	lm3533 = dev_get_drvdata(pdev->dev.parent);
	if (!lm3533)
		return -EINVAL;

	pdata = dev_get_platdata(&pdev->dev);
	if (!pdata) {
		dev_err(&pdev->dev, "no platform data\n");
		return -EINVAL;
	}

	if (pdev->id < 0 || pdev->id >= LM3533_HVCTRLBANK_COUNT) {
		dev_err(&pdev->dev, "illegal backlight id %d\n", pdev->id);
		return -EINVAL;
	}

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

	bl->lm3533 = lm3533;
	bl->id = pdev->id;

	bl->cb.lm3533 = lm3533;
	bl->cb.id = lm3533_bl_get_ctrlbank_id(bl);
	bl->cb.dev = NULL;			/* until registered */

	memset(&props, 0, sizeof(props));
	props.type = BACKLIGHT_RAW;
	props.max_brightness = LM3533_BL_MAX_BRIGHTNESS;
	props.brightness = pdata->default_brightness;
	bd = devm_backlight_device_register(&pdev->dev, pdata->name,
					pdev->dev.parent, bl, &lm3533_bl_ops,
					&props);
	if (IS_ERR(bd)) {
		dev_err(&pdev->dev, "failed to register backlight device\n");
		return PTR_ERR(bd);
	}

	bl->bd = bd;
	bl->cb.dev = &bl->bd->dev;

	platform_set_drvdata(pdev, bl);

	ret = sysfs_create_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to create sysfs attributes\n");
		return ret;
	}

	backlight_update_status(bd);

	ret = lm3533_bl_setup(bl, pdata);
	if (ret)
		goto err_sysfs_remove;

	ret = lm3533_ctrlbank_enable(&bl->cb);
	if (ret)
		goto err_sysfs_remove;

	return 0;

err_sysfs_remove:
	sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group);

	return ret;
}

static void lm3533_bl_remove(struct platform_device *pdev)
{
	struct lm3533_bl *bl = platform_get_drvdata(pdev);
	struct backlight_device *bd = bl->bd;

	dev_dbg(&bd->dev, "%s\n", __func__);

	bd->props.power = BACKLIGHT_POWER_OFF;
	bd->props.brightness = 0;

	lm3533_ctrlbank_disable(&bl->cb);
	sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
}

#ifdef CONFIG_PM_SLEEP
static int lm3533_bl_suspend(struct device *dev)
{
	struct lm3533_bl *bl = dev_get_drvdata(dev);

	dev_dbg(dev, "%s\n", __func__);

	return lm3533_ctrlbank_disable(&bl->cb);
}

static int lm3533_bl_resume(struct device *dev)
{
	struct lm3533_bl *bl = dev_get_drvdata(dev);

	dev_dbg(dev, "%s\n", __func__);

	return lm3533_ctrlbank_enable(&bl->cb);
}
#endif

static SIMPLE_DEV_PM_OPS(lm3533_bl_pm_ops, lm3533_bl_suspend, lm3533_bl_resume);

static void lm3533_bl_shutdown(struct platform_device *pdev)
{
	struct lm3533_bl *bl = platform_get_drvdata(pdev);

	dev_dbg(&pdev->dev, "%s\n", __func__);

	lm3533_ctrlbank_disable(&bl->cb);
}

static struct platform_driver lm3533_bl_driver = {
	.driver = {
		.name	= "lm3533-backlight",
		.pm	= &lm3533_bl_pm_ops,
	},
	.probe		= lm3533_bl_probe,
	.remove		= lm3533_bl_remove,
	.shutdown	= lm3533_bl_shutdown,
};
module_platform_driver(lm3533_bl_driver);

MODULE_AUTHOR("Johan Hovold <[email protected]>");
MODULE_DESCRIPTION("LM3533 Backlight driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:lm3533-backlight");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
7f26c970 JH	2	/*
	3	* lm3533-bl.c -- LM3533 Backlight driver
	4	*
	5	* Copyright (C) 2011-2012 Texas Instruments
	6	*
	7	* Author: Johan Hovold <[email protected]>
7f26c970 JH	8	*/
	9
	10	#include <linux/module.h>
	11	#include <linux/init.h>
	12	#include <linux/platform_device.h>
	13	#include <linux/backlight.h>
7f26c970 JH	14	#include <linux/slab.h>
	15
	16	#include <linux/mfd/lm3533.h>
	17
	18
	19	#define LM3533_HVCTRLBANK_COUNT 2
	20	#define LM3533_BL_MAX_BRIGHTNESS 255
	21
	22	#define LM3533_REG_CTRLBANK_AB_BCONF 0x1a
	23
	24
	25	struct lm3533_bl {
	26	struct lm3533 *lm3533;
	27	struct lm3533_ctrlbank cb;
	28	struct backlight_device *bd;
	29	int id;
	30	};
	31
	32
	33	static inline int lm3533_bl_get_ctrlbank_id(struct lm3533_bl *bl)
	34	{
	35	return bl->id;
	36	}
	37
	38	static int lm3533_bl_update_status(struct backlight_device *bd)
	39	{
	40	struct lm3533_bl *bl = bl_get_data(bd);
7f26c970	41
51d53e5b	42	return lm3533_ctrlbank_set_brightness(&bl->cb, backlight_get_brightness(bd));
7f26c970 JH	43	}
	44
	45	static int lm3533_bl_get_brightness(struct backlight_device *bd)
	46	{
	47	struct lm3533_bl *bl = bl_get_data(bd);
	48	u8 val;
	49	int ret;
	50
	51	ret = lm3533_ctrlbank_get_brightness(&bl->cb, &val);
	52	if (ret)
	53	return ret;
	54
	55	return val;
	56	}
	57
	58	static const struct backlight_ops lm3533_bl_ops = {
	59	.get_brightness = lm3533_bl_get_brightness,
	60	.update_status = lm3533_bl_update_status,
	61	};
	62
	63	static ssize_t show_id(struct device *dev,
	64	struct device_attribute attr, char buf)
	65	{
	66	struct lm3533_bl *bl = dev_get_drvdata(dev);
	67
	68	return scnprintf(buf, PAGE_SIZE, "%d\n", bl->id);
	69	}
	70
	71	static ssize_t show_als_channel(struct device *dev,
	72	struct device_attribute attr, char buf)
	73	{
	74	struct lm3533_bl *bl = dev_get_drvdata(dev);
	75	unsigned channel = lm3533_bl_get_ctrlbank_id(bl);
	76
	77	return scnprintf(buf, PAGE_SIZE, "%u\n", channel);
	78	}
	79
	80	static ssize_t show_als_en(struct device *dev,
	81	struct device_attribute attr, char buf)
	82	{
	83	struct lm3533_bl *bl = dev_get_drvdata(dev);
	84	int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
	85	u8 val;
	86	u8 mask;
	87	bool enable;
	88	int ret;
	89
	90	ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val);
	91	if (ret)
	92	return ret;
	93
	94	mask = 1 << (2 * ctrlbank);
	95	enable = val & mask;
	96
	97	return scnprintf(buf, PAGE_SIZE, "%d\n", enable);
	98	}
	99
	100	static ssize_t store_als_en(struct device *dev,
	101	struct device_attribute *attr,
	102	const char *buf, size_t len)
	103	{
	104	struct lm3533_bl *bl = dev_get_drvdata(dev);
	105	int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
	106	int enable;
107	u8 val;
108	u8 mask;
109	int ret;
110
111	if (kstrtoint(buf, 0, &enable))
112	return -EINVAL;
113
114	mask = 1 << (2 * ctrlbank);
115
116	if (enable)
117	val = mask;
118	else
119	val = 0;
120
121	ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val,
122	mask);
123	if (ret)
124	return ret;
125
126	return len;
127	}
128
129	static ssize_t show_linear(struct device *dev,
130	struct device_attribute attr, char buf)
131	{
132	struct lm3533_bl *bl = dev_get_drvdata(dev);
133	u8 val;
134	u8 mask;
135	int linear;
136	int ret;
137
138	ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val);
139	if (ret)
140	return ret;
141
142	mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1);
143
144	if (val & mask)
145	linear = 1;
146	else
147	linear = 0;
148
149	return scnprintf(buf, PAGE_SIZE, "%x\n", linear);
150	}
151
152	static ssize_t store_linear(struct device *dev,
153	struct device_attribute *attr,
154	const char *buf, size_t len)
155	{
156	struct lm3533_bl *bl = dev_get_drvdata(dev);
157	unsigned long linear;
158	u8 mask;
159	u8 val;
160	int ret;
161
162	if (kstrtoul(buf, 0, &linear))
163	return -EINVAL;
164
165	mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1);
166
167	if (linear)
168	val = mask;
169	else
170	val = 0;
171
172	ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val,
173	mask);
174	if (ret)
175	return ret;
176
177	return len;
178	}
179
180	static ssize_t show_pwm(struct device *dev,
181	struct device_attribute *attr,
182	char *buf)
183	{
184	struct lm3533_bl *bl = dev_get_drvdata(dev);
185	u8 val;
186	int ret;
187
188	ret = lm3533_ctrlbank_get_pwm(&bl->cb, &val);
189	if (ret)
190	return ret;
191
192	return scnprintf(buf, PAGE_SIZE, "%u\n", val);
193	}
194
195	static ssize_t store_pwm(struct device *dev,
196	struct device_attribute *attr,
197	const char *buf, size_t len)
198	{
199	struct lm3533_bl *bl = dev_get_drvdata(dev);
200	u8 val;
201	int ret;
202
203	if (kstrtou8(buf, 0, &val))
204	return -EINVAL;
205
206	ret = lm3533_ctrlbank_set_pwm(&bl->cb, val);
207	if (ret)
208	return ret;
209
210	return len;
211	}
212
213	static LM3533_ATTR_RO(als_channel);
214	static LM3533_ATTR_RW(als_en);
215	static LM3533_ATTR_RO(id);
216	static LM3533_ATTR_RW(linear);
217	static LM3533_ATTR_RW(pwm);
218
219	static struct attribute *lm3533_bl_attributes[] = {
220	&dev_attr_als_channel.attr,
221	&dev_attr_als_en.attr,
222	&dev_attr_id.attr,
223	&dev_attr_linear.attr,
224	&dev_attr_pwm.attr,
225	NULL,
226	};
227
228	static umode_t lm3533_bl_attr_is_visible(struct kobject *kobj,
229	struct attribute *attr, int n)
230	{
a9b9b2af	231	struct device *dev = kobj_to_dev(kobj);
7f26c970 JH	232	struct lm3533_bl *bl = dev_get_drvdata(dev);
	233	umode_t mode = attr->mode;
	234
	235	if (attr == &dev_attr_als_channel.attr \|\|
	236	attr == &dev_attr_als_en.attr) {
	237	if (!bl->lm3533->have_als)
	238	mode = 0;
	239	}
	240
	241	return mode;
	242	};
	243
	244	static struct attribute_group lm3533_bl_attribute_group = {
	245	.is_visible = lm3533_bl_attr_is_visible,
	246	.attrs = lm3533_bl_attributes
	247	};
	248
1b9e450d	249	static int lm3533_bl_setup(struct lm3533_bl *bl,
7f26c970 JH	250	struct lm3533_bl_platform_data *pdata)
	251	{
	252	int ret;
	253
	254	ret = lm3533_ctrlbank_set_max_current(&bl->cb, pdata->max_current);
	255	if (ret)
	256	return ret;
	257
	258	return lm3533_ctrlbank_set_pwm(&bl->cb, pdata->pwm);
	259	}
	260
1b9e450d	261	static int lm3533_bl_probe(struct platform_device *pdev)
7f26c970 JH	262	{
	263	struct lm3533 *lm3533;
	264	struct lm3533_bl_platform_data *pdata;
	265	struct lm3533_bl *bl;
	266	struct backlight_device *bd;
	267	struct backlight_properties props;
	268	int ret;
	269
	270	dev_dbg(&pdev->dev, "%s\n", __func__);
	271
	272	lm3533 = dev_get_drvdata(pdev->dev.parent);
	273	if (!lm3533)
	274	return -EINVAL;
	275
c512794c	276	pdata = dev_get_platdata(&pdev->dev);
7f26c970 JH	277	if (!pdata) {
	278	dev_err(&pdev->dev, "no platform data\n");
	279	return -EINVAL;
	280	}
	281
	282	if (pdev->id < 0 \|\| pdev->id >= LM3533_HVCTRLBANK_COUNT) {
	283	dev_err(&pdev->dev, "illegal backlight id %d\n", pdev->id);
	284	return -EINVAL;
	285	}
	286
b4a74615	287	bl = devm_kzalloc(&pdev->dev, sizeof(*bl), GFP_KERNEL);
44d516f9	288	if (!bl)
7f26c970	289	return -ENOMEM;
7f26c970 JH	290
	291	bl->lm3533 = lm3533;
	292	bl->id = pdev->id;
	293
	294	bl->cb.lm3533 = lm3533;
	295	bl->cb.id = lm3533_bl_get_ctrlbank_id(bl);
	296	bl->cb.dev = NULL; /* until registered */
	297
	298	memset(&props, 0, sizeof(props));
	299	props.type = BACKLIGHT_RAW;
	300	props.max_brightness = LM3533_BL_MAX_BRIGHTNESS;
	301	props.brightness = pdata->default_brightness;
e86c7098 JH	302	bd = devm_backlight_device_register(&pdev->dev, pdata->name,
	303	pdev->dev.parent, bl, &lm3533_bl_ops,
	304	&props);
7f26c970 JH	305	if (IS_ERR(bd)) {
7f26c970 JH	306	dev_err(&pdev->dev, "failed to register backlight device\n");
b4a74615	307	return PTR_ERR(bd);
7f26c970 JH	308	}
	309
	310	bl->bd = bd;
	311	bl->cb.dev = &bl->bd->dev;
	312
	313	platform_set_drvdata(pdev, bl);
	314
	315	ret = sysfs_create_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
	316	if (ret < 0) {
	317	dev_err(&pdev->dev, "failed to create sysfs attributes\n");
e86c7098	318	return ret;
7f26c970 JH	319	}
	320
	321	backlight_update_status(bd);
	322
	323	ret = lm3533_bl_setup(bl, pdata);
	324	if (ret)
	325	goto err_sysfs_remove;
	326
	327	ret = lm3533_ctrlbank_enable(&bl->cb);
	328	if (ret)
	329	goto err_sysfs_remove;
	330
	331	return 0;
	332
	333	err_sysfs_remove:
	334	sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
7f26c970 JH	335
	336	return ret;
	337	}
	338
cba7dfe0	339	static void lm3533_bl_remove(struct platform_device *pdev)
7f26c970 JH	340	{
	341	struct lm3533_bl *bl = platform_get_drvdata(pdev);
	342	struct backlight_device *bd = bl->bd;
	343
	344	dev_dbg(&bd->dev, "%s\n", __func__);
	345
761c8391	346	bd->props.power = BACKLIGHT_POWER_OFF;
7f26c970 JH	347	bd->props.brightness = 0;
	348
	349	lm3533_ctrlbank_disable(&bl->cb);
	350	sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
7f26c970 JH	351	}
7f26c970 JH	352
b0792962 JH	353	#ifdef CONFIG_PM_SLEEP
b0792962 JH	354	static int lm3533_bl_suspend(struct device *dev)
7f26c970	355	{
b0792962	356	struct lm3533_bl *bl = dev_get_drvdata(dev);
7f26c970	357
b0792962	358	dev_dbg(dev, "%s\n", __func__);
7f26c970 JH	359
	360	return lm3533_ctrlbank_disable(&bl->cb);
	361	}
	362
b0792962	363	static int lm3533_bl_resume(struct device *dev)
7f26c970	364	{
b0792962	365	struct lm3533_bl *bl = dev_get_drvdata(dev);
7f26c970	366
b0792962	367	dev_dbg(dev, "%s\n", __func__);
7f26c970 JH	368
	369	return lm3533_ctrlbank_enable(&bl->cb);
	370	}
7f26c970 JH	371	#endif
7f26c970 JH	372
b0792962 JH	373	static SIMPLE_DEV_PM_OPS(lm3533_bl_pm_ops, lm3533_bl_suspend, lm3533_bl_resume);
b0792962 JH	374
7f26c970 JH	375	static void lm3533_bl_shutdown(struct platform_device *pdev)
	376	{
	377	struct lm3533_bl *bl = platform_get_drvdata(pdev);
	378
	379	dev_dbg(&pdev->dev, "%s\n", __func__);
	380
	381	lm3533_ctrlbank_disable(&bl->cb);
	382	}
	383
	384	static struct platform_driver lm3533_bl_driver = {
	385	.driver = {
	386	.name = "lm3533-backlight",
b0792962	387	.pm = &lm3533_bl_pm_ops,
7f26c970 JH	388	},
7f26c970 JH	389	.probe = lm3533_bl_probe,
e70140ba	390	.remove = lm3533_bl_remove,
7f26c970	391	.shutdown = lm3533_bl_shutdown,
7f26c970 JH	392	};
	393	module_platform_driver(lm3533_bl_driver);
	394
	395	MODULE_AUTHOR("Johan Hovold <[email protected]>");
	396	MODULE_DESCRIPTION("LM3533 Backlight driver");
	397	MODULE_LICENSE("GPL");
	398	MODULE_ALIAS("platform:lm3533-backlight");