[linux-2.6-block.git] / drivers / video / backlight / lm3533_bl.c

/*
 * lm3533-bl.c -- LM3533 Backlight driver
 *
 * Copyright (C) 2011-2012 Texas Instruments
 *
 * Author: Johan Hovold <jhovold@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under  the terms of the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the License, or (at your
 * option) any later version.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/backlight.h>
#include <linux/fb.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);
	int brightness = bd->props.brightness;

	if (bd->props.power != FB_BLANK_UNBLANK)
		brightness = 0;
	if (bd->props.fb_blank != FB_BLANK_UNBLANK)
		brightness = 0;

	return lm3533_ctrlbank_set_brightness(&bl->cb, (u8)brightness);
}

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 = container_of(kobj, struct device, 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 int 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 = FB_BLANK_POWERDOWN;
	bd->props.brightness = 0;

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

	return 0;
}

#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 <jhovold@gmail.com>");
MODULE_DESCRIPTION("LM3533 Backlight driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:lm3533-backlight");
Commit	Line	Data
7f26c970 JH	1	/*
	2	* lm3533-bl.c -- LM3533 Backlight driver
	3	*
	4	* Copyright (C) 2011-2012 Texas Instruments
	5	*
	6	* Author: Johan Hovold <jhovold@gmail.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/init.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/backlight.h>
	18	#include <linux/fb.h>
	19	#include <linux/slab.h>
	20
	21	#include <linux/mfd/lm3533.h>
	22
	23
	24	#define LM3533_HVCTRLBANK_COUNT 2
	25	#define LM3533_BL_MAX_BRIGHTNESS 255
	26
	27	#define LM3533_REG_CTRLBANK_AB_BCONF 0x1a
	28
	29
	30	struct lm3533_bl {
	31	struct lm3533 *lm3533;
	32	struct lm3533_ctrlbank cb;
	33	struct backlight_device *bd;
	34	int id;
	35	};
	36
	37
	38	static inline int lm3533_bl_get_ctrlbank_id(struct lm3533_bl *bl)
	39	{
	40	return bl->id;
	41	}
	42
	43	static int lm3533_bl_update_status(struct backlight_device *bd)
	44	{
	45	struct lm3533_bl *bl = bl_get_data(bd);
	46	int brightness = bd->props.brightness;
	47
	48	if (bd->props.power != FB_BLANK_UNBLANK)
	49	brightness = 0;
	50	if (bd->props.fb_blank != FB_BLANK_UNBLANK)
	51	brightness = 0;
	52
	53	return lm3533_ctrlbank_set_brightness(&bl->cb, (u8)brightness);
	54	}
	55
	56	static int lm3533_bl_get_brightness(struct backlight_device *bd)
	57	{
	58	struct lm3533_bl *bl = bl_get_data(bd);
	59	u8 val;
	60	int ret;
	61
	62	ret = lm3533_ctrlbank_get_brightness(&bl->cb, &val);
	63	if (ret)
	64	return ret;
65
66	return val;
67	}
68
69	static const struct backlight_ops lm3533_bl_ops = {
70	.get_brightness = lm3533_bl_get_brightness,
71	.update_status = lm3533_bl_update_status,
72	};
73
74	static ssize_t show_id(struct device *dev,
75	struct device_attribute attr, char buf)
76	{
77	struct lm3533_bl *bl = dev_get_drvdata(dev);
78
79	return scnprintf(buf, PAGE_SIZE, "%d\n", bl->id);
80	}
81
82	static ssize_t show_als_channel(struct device *dev,
83	struct device_attribute attr, char buf)
84	{
85	struct lm3533_bl *bl = dev_get_drvdata(dev);
86	unsigned channel = lm3533_bl_get_ctrlbank_id(bl);
87
88	return scnprintf(buf, PAGE_SIZE, "%u\n", channel);
89	}
90
91	static ssize_t show_als_en(struct device *dev,
92	struct device_attribute attr, char buf)
93	{
94	struct lm3533_bl *bl = dev_get_drvdata(dev);
95	int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
96	u8 val;
97	u8 mask;
98	bool enable;
99	int ret;
100
101	ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val);
102	if (ret)
103	return ret;
104
105	mask = 1 << (2 * ctrlbank);
106	enable = val & mask;
107
108	return scnprintf(buf, PAGE_SIZE, "%d\n", enable);
109	}
110
111	static ssize_t store_als_en(struct device *dev,
112	struct device_attribute *attr,
113	const char *buf, size_t len)
114	{
115	struct lm3533_bl *bl = dev_get_drvdata(dev);
116	int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
117	int enable;
118	u8 val;
119	u8 mask;
120	int ret;
121
122	if (kstrtoint(buf, 0, &enable))
123	return -EINVAL;
124
125	mask = 1 << (2 * ctrlbank);
126
127	if (enable)
128	val = mask;
129	else
130	val = 0;
131
132	ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val,
133	mask);
134	if (ret)
135	return ret;
136
137	return len;
138	}
139
140	static ssize_t show_linear(struct device *dev,
141	struct device_attribute attr, char buf)
142	{
143	struct lm3533_bl *bl = dev_get_drvdata(dev);
144	u8 val;
145	u8 mask;
146	int linear;
147	int ret;
148
149	ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val);
150	if (ret)
151	return ret;
152
153	mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1);
154
155	if (val & mask)
156	linear = 1;
157	else
158	linear = 0;
159
160	return scnprintf(buf, PAGE_SIZE, "%x\n", linear);
161	}
162
163	static ssize_t store_linear(struct device *dev,
164	struct device_attribute *attr,
165	const char *buf, size_t len)
166	{
167	struct lm3533_bl *bl = dev_get_drvdata(dev);
168	unsigned long linear;
169	u8 mask;
170	u8 val;
171	int ret;
172
173	if (kstrtoul(buf, 0, &linear))
174	return -EINVAL;
175
176	mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1);
177
178	if (linear)
179	val = mask;
180	else
181	val = 0;
182
183	ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val,
184	mask);
185	if (ret)
186	return ret;
187
188	return len;
189	}
190
191	static ssize_t show_pwm(struct device *dev,
192	struct device_attribute *attr,
193	char *buf)
194	{
195	struct lm3533_bl *bl = dev_get_drvdata(dev);
196	u8 val;
197	int ret;
198
199	ret = lm3533_ctrlbank_get_pwm(&bl->cb, &val);
200	if (ret)
201	return ret;
202
203	return scnprintf(buf, PAGE_SIZE, "%u\n", val);
204	}
205
206	static ssize_t store_pwm(struct device *dev,
207	struct device_attribute *attr,
208	const char *buf, size_t len)
209	{
210	struct lm3533_bl *bl = dev_get_drvdata(dev);
211	u8 val;
212	int ret;
213
214	if (kstrtou8(buf, 0, &val))
215	return -EINVAL;
216
217	ret = lm3533_ctrlbank_set_pwm(&bl->cb, val);
218	if (ret)
219	return ret;
220
221	return len;
222	}
223
224	static LM3533_ATTR_RO(als_channel);
225	static LM3533_ATTR_RW(als_en);
226	static LM3533_ATTR_RO(id);
227	static LM3533_ATTR_RW(linear);
228	static LM3533_ATTR_RW(pwm);
229
230	static struct attribute *lm3533_bl_attributes[] = {
231	&dev_attr_als_channel.attr,
232	&dev_attr_als_en.attr,
233	&dev_attr_id.attr,
234	&dev_attr_linear.attr,
235	&dev_attr_pwm.attr,
236	NULL,
237	};
238
239	static umode_t lm3533_bl_attr_is_visible(struct kobject *kobj,
240	struct attribute *attr, int n)
241	{
242	struct device *dev = container_of(kobj, struct device, kobj);
243	struct lm3533_bl *bl = dev_get_drvdata(dev);
244	umode_t mode = attr->mode;
245
246	if (attr == &dev_attr_als_channel.attr \|\|
247	attr == &dev_attr_als_en.attr) {
248	if (!bl->lm3533->have_als)
249	mode = 0;
250	}
251
252	return mode;
253	};
254
255	static struct attribute_group lm3533_bl_attribute_group = {
256	.is_visible = lm3533_bl_attr_is_visible,
257	.attrs = lm3533_bl_attributes
258	};
259
1b9e450d	260	static int lm3533_bl_setup(struct lm3533_bl *bl,
7f26c970 JH	261	struct lm3533_bl_platform_data *pdata)
	262	{
	263	int ret;
	264
	265	ret = lm3533_ctrlbank_set_max_current(&bl->cb, pdata->max_current);
	266	if (ret)
	267	return ret;
	268
	269	return lm3533_ctrlbank_set_pwm(&bl->cb, pdata->pwm);
	270	}
	271
1b9e450d	272	static int lm3533_bl_probe(struct platform_device *pdev)
7f26c970 JH	273	{
	274	struct lm3533 *lm3533;
	275	struct lm3533_bl_platform_data *pdata;
	276	struct lm3533_bl *bl;
	277	struct backlight_device *bd;
	278	struct backlight_properties props;
	279	int ret;
	280
	281	dev_dbg(&pdev->dev, "%s\n", __func__);
	282
	283	lm3533 = dev_get_drvdata(pdev->dev.parent);
	284	if (!lm3533)
	285	return -EINVAL;
	286
c512794c	287	pdata = dev_get_platdata(&pdev->dev);
7f26c970 JH	288	if (!pdata) {
	289	dev_err(&pdev->dev, "no platform data\n");
	290	return -EINVAL;
	291	}
	292
	293	if (pdev->id < 0 \|\| pdev->id >= LM3533_HVCTRLBANK_COUNT) {
	294	dev_err(&pdev->dev, "illegal backlight id %d\n", pdev->id);
	295	return -EINVAL;
	296	}
	297
b4a74615	298	bl = devm_kzalloc(&pdev->dev, sizeof(*bl), GFP_KERNEL);
44d516f9	299	if (!bl)
7f26c970	300	return -ENOMEM;
7f26c970 JH	301
	302	bl->lm3533 = lm3533;
	303	bl->id = pdev->id;
	304
	305	bl->cb.lm3533 = lm3533;
	306	bl->cb.id = lm3533_bl_get_ctrlbank_id(bl);
	307	bl->cb.dev = NULL; /* until registered */
	308
	309	memset(&props, 0, sizeof(props));
	310	props.type = BACKLIGHT_RAW;
	311	props.max_brightness = LM3533_BL_MAX_BRIGHTNESS;
	312	props.brightness = pdata->default_brightness;
e86c7098 JH	313	bd = devm_backlight_device_register(&pdev->dev, pdata->name,
	314	pdev->dev.parent, bl, &lm3533_bl_ops,
	315	&props);
7f26c970 JH	316	if (IS_ERR(bd)) {
7f26c970 JH	317	dev_err(&pdev->dev, "failed to register backlight device\n");
b4a74615	318	return PTR_ERR(bd);
7f26c970 JH	319	}
	320
	321	bl->bd = bd;
	322	bl->cb.dev = &bl->bd->dev;
	323
	324	platform_set_drvdata(pdev, bl);
	325
	326	ret = sysfs_create_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
	327	if (ret < 0) {
	328	dev_err(&pdev->dev, "failed to create sysfs attributes\n");
e86c7098	329	return ret;
7f26c970 JH	330	}
	331
	332	backlight_update_status(bd);
	333
	334	ret = lm3533_bl_setup(bl, pdata);
	335	if (ret)
	336	goto err_sysfs_remove;
	337
	338	ret = lm3533_ctrlbank_enable(&bl->cb);
	339	if (ret)
	340	goto err_sysfs_remove;
	341
	342	return 0;
	343
	344	err_sysfs_remove:
	345	sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
7f26c970 JH	346
	347	return ret;
	348	}
	349
7e4b9d0b	350	static int lm3533_bl_remove(struct platform_device *pdev)
7f26c970 JH	351	{
	352	struct lm3533_bl *bl = platform_get_drvdata(pdev);
	353	struct backlight_device *bd = bl->bd;
	354
	355	dev_dbg(&bd->dev, "%s\n", __func__);
	356
	357	bd->props.power = FB_BLANK_POWERDOWN;
	358	bd->props.brightness = 0;
	359
	360	lm3533_ctrlbank_disable(&bl->cb);
	361	sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
7f26c970 JH	362
	363	return 0;
	364	}
	365
b0792962 JH	366	#ifdef CONFIG_PM_SLEEP
b0792962 JH	367	static int lm3533_bl_suspend(struct device *dev)
7f26c970	368	{
b0792962	369	struct lm3533_bl *bl = dev_get_drvdata(dev);
7f26c970	370
b0792962	371	dev_dbg(dev, "%s\n", __func__);
7f26c970 JH	372
	373	return lm3533_ctrlbank_disable(&bl->cb);
	374	}
	375
b0792962	376	static int lm3533_bl_resume(struct device *dev)
7f26c970	377	{
b0792962	378	struct lm3533_bl *bl = dev_get_drvdata(dev);
7f26c970	379
b0792962	380	dev_dbg(dev, "%s\n", __func__);
7f26c970 JH	381
	382	return lm3533_ctrlbank_enable(&bl->cb);
	383	}
7f26c970 JH	384	#endif
7f26c970 JH	385
b0792962 JH	386	static SIMPLE_DEV_PM_OPS(lm3533_bl_pm_ops, lm3533_bl_suspend, lm3533_bl_resume);
b0792962 JH	387
7f26c970 JH	388	static void lm3533_bl_shutdown(struct platform_device *pdev)
	389	{
	390	struct lm3533_bl *bl = platform_get_drvdata(pdev);
	391
	392	dev_dbg(&pdev->dev, "%s\n", __func__);
	393
	394	lm3533_ctrlbank_disable(&bl->cb);
	395	}
	396
	397	static struct platform_driver lm3533_bl_driver = {
	398	.driver = {
	399	.name = "lm3533-backlight",
b0792962	400	.pm = &lm3533_bl_pm_ops,
7f26c970 JH	401	},
7f26c970 JH	402	.probe = lm3533_bl_probe,
d1723fa2	403	.remove = lm3533_bl_remove,
7f26c970	404	.shutdown = lm3533_bl_shutdown,
7f26c970 JH	405	};
	406	module_platform_driver(lm3533_bl_driver);
	407
	408	MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
	409	MODULE_DESCRIPTION("LM3533 Backlight driver");
	410	MODULE_LICENSE("GPL");
	411	MODULE_ALIAS("platform:lm3533-backlight");