[mirror_ubuntu-artful-kernel.git] / drivers / media / i2c / ad5820.c

/*
 * drivers/media/i2c/ad5820.c
 *
 * AD5820 DAC driver for camera voice coil focus.
 *
 * Copyright (C) 2008 Nokia Corporation
 * Copyright (C) 2007 Texas Instruments
 * Copyright (C) 2016 Pavel Machek <pavel@ucw.cz>
 *
 * Contact: Tuukka Toivonen <tuukkat76@gmail.com>
 *	    Sakari Ailus <sakari.ailus@iki.fi>
 *
 * Based on af_d88.c by Texas Instruments.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

#include <linux/errno.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/regulator/consumer.h>

#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-subdev.h>

#define AD5820_NAME		"ad5820"

/* Register definitions */
#define AD5820_POWER_DOWN		(1 << 15)
#define AD5820_DAC_SHIFT		4
#define AD5820_RAMP_MODE_LINEAR		(0 << 3)
#define AD5820_RAMP_MODE_64_16		(1 << 3)

#define CODE_TO_RAMP_US(s)	((s) == 0 ? 0 : (1 << ((s) - 1)) * 50)
#define RAMP_US_TO_CODE(c)	fls(((c) + ((c)>>1)) / 50)

#define to_ad5820_device(sd)	container_of(sd, struct ad5820_device, subdev)

struct ad5820_device {
	struct v4l2_subdev subdev;
	struct ad5820_platform_data *platform_data;
	struct regulator *vana;

	struct v4l2_ctrl_handler ctrls;
	u32 focus_absolute;
	u32 focus_ramp_time;
	u32 focus_ramp_mode;

	struct mutex power_lock;
	int power_count;

	bool standby;
};

static int ad5820_write(struct ad5820_device *coil, u16 data)
{
	struct i2c_client *client = v4l2_get_subdevdata(&coil->subdev);
	struct i2c_msg msg;
	__be16 be_data;
	int r;

	if (!client->adapter)
		return -ENODEV;

	be_data = cpu_to_be16(data);
	msg.addr  = client->addr;
	msg.flags = 0;
	msg.len   = 2;
	msg.buf   = (u8 *)&be_data;

	r = i2c_transfer(client->adapter, &msg, 1);
	if (r < 0) {
		dev_err(&client->dev, "write failed, error %d\n", r);
		return r;
	}

	return 0;
}

/*
 * Calculate status word and write it to the device based on current
 * values of V4L2 controls. It is assumed that the stored V4L2 control
 * values are properly limited and rounded.
 */
static int ad5820_update_hw(struct ad5820_device *coil)
{
	u16 status;

	status = RAMP_US_TO_CODE(coil->focus_ramp_time);
	status |= coil->focus_ramp_mode
		? AD5820_RAMP_MODE_64_16 : AD5820_RAMP_MODE_LINEAR;
	status |= coil->focus_absolute << AD5820_DAC_SHIFT;

	if (coil->standby)
		status |= AD5820_POWER_DOWN;

	return ad5820_write(coil, status);
}

/*
 * Power handling
 */
static int ad5820_power_off(struct ad5820_device *coil, bool standby)
{
	int ret = 0, ret2;

	/*
	 * Go to standby first as real power off my be denied by the hardware
	 * (single power line control for both coil and sensor).
	 */
	if (standby) {
		coil->standby = true;
		ret = ad5820_update_hw(coil);
	}

	ret2 = regulator_disable(coil->vana);
	if (ret)
		return ret;
	return ret2;
}

static int ad5820_power_on(struct ad5820_device *coil, bool restore)
{
	int ret;

	ret = regulator_enable(coil->vana);
	if (ret < 0)
		return ret;

	if (restore) {
		/* Restore the hardware settings. */
		coil->standby = false;
		ret = ad5820_update_hw(coil);
		if (ret)
			goto fail;
	}
	return 0;

fail:
	coil->standby = true;
	regulator_disable(coil->vana);

	return ret;
}

/*
 * V4L2 controls
 */
static int ad5820_set_ctrl(struct v4l2_ctrl *ctrl)
{
	struct ad5820_device *coil =
		container_of(ctrl->handler, struct ad5820_device, ctrls);

	switch (ctrl->id) {
	case V4L2_CID_FOCUS_ABSOLUTE:
		coil->focus_absolute = ctrl->val;
		return ad5820_update_hw(coil);
	}

	return 0;
}

static const struct v4l2_ctrl_ops ad5820_ctrl_ops = {
	.s_ctrl = ad5820_set_ctrl,
};


static int ad5820_init_controls(struct ad5820_device *coil)
{
	v4l2_ctrl_handler_init(&coil->ctrls, 1);

	/*
	 * V4L2_CID_FOCUS_ABSOLUTE
	 *
	 * Minimum current is 0 mA, maximum is 100 mA. Thus, 1 code is
	 * equivalent to 100/1023 = 0.0978 mA. Nevertheless, we do not use [mA]
	 * for focus position, because it is meaningless for user. Meaningful
	 * would be to use focus distance or even its inverse, but since the
	 * driver doesn't have sufficiently knowledge to do the conversion, we
	 * will just use abstract codes here. In any case, smaller value = focus
	 * position farther from camera. The default zero value means focus at
	 * infinity, and also least current consumption.
	 */
	v4l2_ctrl_new_std(&coil->ctrls, &ad5820_ctrl_ops,
			  V4L2_CID_FOCUS_ABSOLUTE, 0, 1023, 1, 0);

	if (coil->ctrls.error)
		return coil->ctrls.error;

	coil->focus_absolute = 0;
	coil->focus_ramp_time = 0;
	coil->focus_ramp_mode = 0;

	coil->subdev.ctrl_handler = &coil->ctrls;

	return 0;
}

/*
 * V4L2 subdev operations
 */
static int ad5820_registered(struct v4l2_subdev *subdev)
{
	struct ad5820_device *coil = to_ad5820_device(subdev);

	return ad5820_init_controls(coil);
}

static int
ad5820_set_power(struct v4l2_subdev *subdev, int on)
{
	struct ad5820_device *coil = to_ad5820_device(subdev);
	int ret = 0;

	mutex_lock(&coil->power_lock);

	/*
	 * If the power count is modified from 0 to != 0 or from != 0 to 0,
	 * update the power state.
	 */
	if (coil->power_count == !on) {
		ret = on ? ad5820_power_on(coil, true) :
			ad5820_power_off(coil, true);
		if (ret < 0)
			goto done;
	}

	/* Update the power count. */
	coil->power_count += on ? 1 : -1;
	WARN_ON(coil->power_count < 0);

done:
	mutex_unlock(&coil->power_lock);
	return ret;
}

static int ad5820_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
	return ad5820_set_power(sd, 1);
}

static int ad5820_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
	return ad5820_set_power(sd, 0);
}

static const struct v4l2_subdev_core_ops ad5820_core_ops = {
	.s_power = ad5820_set_power,
};

static const struct v4l2_subdev_ops ad5820_ops = {
	.core = &ad5820_core_ops,
};

static const struct v4l2_subdev_internal_ops ad5820_internal_ops = {
	.registered = ad5820_registered,
	.open = ad5820_open,
	.close = ad5820_close,
};

/*
 * I2C driver
 */
static int __maybe_unused ad5820_suspend(struct device *dev)
{
	struct i2c_client *client = container_of(dev, struct i2c_client, dev);
	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
	struct ad5820_device *coil = to_ad5820_device(subdev);

	if (!coil->power_count)
		return 0;

	return ad5820_power_off(coil, false);
}

static int __maybe_unused ad5820_resume(struct device *dev)
{
	struct i2c_client *client = container_of(dev, struct i2c_client, dev);
	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
	struct ad5820_device *coil = to_ad5820_device(subdev);

	if (!coil->power_count)
		return 0;

	return ad5820_power_on(coil, true);
}

static int ad5820_probe(struct i2c_client *client,
			const struct i2c_device_id *devid)
{
	struct ad5820_device *coil;
	int ret;

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

	coil->vana = devm_regulator_get(&client->dev, "VANA");
	if (IS_ERR(coil->vana)) {
		ret = PTR_ERR(coil->vana);
		if (ret != -EPROBE_DEFER)
			dev_err(&client->dev, "could not get regulator for vana\n");
		return ret;
	}

	mutex_init(&coil->power_lock);

	v4l2_i2c_subdev_init(&coil->subdev, client, &ad5820_ops);
	coil->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
	coil->subdev.internal_ops = &ad5820_internal_ops;
	strcpy(coil->subdev.name, "ad5820 focus");

	ret = media_entity_pads_init(&coil->subdev.entity, 0, NULL);
	if (ret < 0)
		goto cleanup2;

	ret = v4l2_async_register_subdev(&coil->subdev);
	if (ret < 0)
		goto cleanup;

	return ret;

cleanup2:
	mutex_destroy(&coil->power_lock);
cleanup:
	media_entity_cleanup(&coil->subdev.entity);
	return ret;
}

static int ad5820_remove(struct i2c_client *client)
{
	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
	struct ad5820_device *coil = to_ad5820_device(subdev);

	v4l2_async_unregister_subdev(&coil->subdev);
	v4l2_ctrl_handler_free(&coil->ctrls);
	media_entity_cleanup(&coil->subdev.entity);
	mutex_destroy(&coil->power_lock);
	return 0;
}

static const struct i2c_device_id ad5820_id_table[] = {
	{ AD5820_NAME, 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ad5820_id_table);

static SIMPLE_DEV_PM_OPS(ad5820_pm, ad5820_suspend, ad5820_resume);

static struct i2c_driver ad5820_i2c_driver = {
	.driver		= {
		.name	= AD5820_NAME,
		.pm	= &ad5820_pm,
	},
	.probe		= ad5820_probe,
	.remove		= ad5820_remove,
	.id_table	= ad5820_id_table,
};

module_i2c_driver(ad5820_i2c_driver);

MODULE_AUTHOR("Tuukka Toivonen");
MODULE_DESCRIPTION("AD5820 camera lens driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
bee3d511 PM	1	/*
	2	* drivers/media/i2c/ad5820.c
	3	*
	4	* AD5820 DAC driver for camera voice coil focus.
	5	*
	6	* Copyright (C) 2008 Nokia Corporation
	7	* Copyright (C) 2007 Texas Instruments
	8	* Copyright (C) 2016 Pavel Machek <pavel@ucw.cz>
	9	*
	10	* Contact: Tuukka Toivonen <tuukkat76@gmail.com>
	11	* Sakari Ailus <sakari.ailus@iki.fi>
	12	*
	13	* Based on af_d88.c by Texas Instruments.
	14	*
	15	* This program is free software; you can redistribute it and/or
	16	* modify it under the terms of the GNU General Public License
	17	* version 2 as published by the Free Software Foundation.
	18	*
	19	* This program is distributed in the hope that it will be useful, but
	20	* WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	22	* General Public License for more details.
	23	*/
	24
	25	#include <linux/errno.h>
	26	#include <linux/i2c.h>
	27	#include <linux/kernel.h>
	28	#include <linux/module.h>
	29	#include <linux/regulator/consumer.h>
	30
	31	#include <media/v4l2-ctrls.h>
	32	#include <media/v4l2-device.h>
	33	#include <media/v4l2-subdev.h>
	34
	35	#define AD5820_NAME "ad5820"
	36
	37	/* Register definitions */
	38	#define AD5820_POWER_DOWN (1 << 15)
	39	#define AD5820_DAC_SHIFT 4
	40	#define AD5820_RAMP_MODE_LINEAR (0 << 3)
	41	#define AD5820_RAMP_MODE_64_16 (1 << 3)
	42
	43	#define CODE_TO_RAMP_US(s) ((s) == 0 ? 0 : (1 << ((s) - 1)) * 50)
	44	#define RAMP_US_TO_CODE(c) fls(((c) + ((c)>>1)) / 50)
	45
	46	#define to_ad5820_device(sd) container_of(sd, struct ad5820_device, subdev)
	47
	48	struct ad5820_device {
	49	struct v4l2_subdev subdev;
	50	struct ad5820_platform_data *platform_data;
	51	struct regulator *vana;
	52
	53	struct v4l2_ctrl_handler ctrls;
	54	u32 focus_absolute;
	55	u32 focus_ramp_time;
	56	u32 focus_ramp_mode;
	57
	58	struct mutex power_lock;
	59	int power_count;
	60
3933186a	61	bool standby;
bee3d511 PM	62	};
	63
	64	static int ad5820_write(struct ad5820_device *coil, u16 data)
	65	{
	66	struct i2c_client *client = v4l2_get_subdevdata(&coil->subdev);
	67	struct i2c_msg msg;
1ff52fa0	68	__be16 be_data;
bee3d511 PM	69	int r;
	70
	71	if (!client->adapter)
	72	return -ENODEV;
	73
1ff52fa0	74	be_data = cpu_to_be16(data);
bee3d511 PM	75	msg.addr = client->addr;
	76	msg.flags = 0;
	77	msg.len = 2;
1ff52fa0	78	msg.buf = (u8 *)&be_data;
bee3d511 PM	79
	80	r = i2c_transfer(client->adapter, &msg, 1);
	81	if (r < 0) {
	82	dev_err(&client->dev, "write failed, error %d\n", r);
	83	return r;
	84	}
	85
	86	return 0;
	87	}
	88
	89	/*
	90	* Calculate status word and write it to the device based on current
	91	* values of V4L2 controls. It is assumed that the stored V4L2 control
	92	* values are properly limited and rounded.
	93	*/
	94	static int ad5820_update_hw(struct ad5820_device *coil)
	95	{
	96	u16 status;
	97
	98	status = RAMP_US_TO_CODE(coil->focus_ramp_time);
	99	status \|= coil->focus_ramp_mode
	100	? AD5820_RAMP_MODE_64_16 : AD5820_RAMP_MODE_LINEAR;
	101	status \|= coil->focus_absolute << AD5820_DAC_SHIFT;
	102
	103	if (coil->standby)
	104	status \|= AD5820_POWER_DOWN;
	105
	106	return ad5820_write(coil, status);
	107	}
	108
	109	/*
	110	* Power handling
	111	*/
3933186a	112	static int ad5820_power_off(struct ad5820_device *coil, bool standby)
bee3d511 PM	113	{
	114	int ret = 0, ret2;
	115
	116	/*
	117	* Go to standby first as real power off my be denied by the hardware
	118	* (single power line control for both coil and sensor).
	119	*/
	120	if (standby) {
3933186a	121	coil->standby = true;
bee3d511 PM	122	ret = ad5820_update_hw(coil);
	123	}
	124
	125	ret2 = regulator_disable(coil->vana);
	126	if (ret)
	127	return ret;
	128	return ret2;
	129	}
	130
3933186a	131	static int ad5820_power_on(struct ad5820_device *coil, bool restore)
bee3d511 PM	132	{
	133	int ret;
	134
	135	ret = regulator_enable(coil->vana);
	136	if (ret < 0)
	137	return ret;
	138
	139	if (restore) {
	140	/* Restore the hardware settings. */
3933186a	141	coil->standby = false;
bee3d511 PM	142	ret = ad5820_update_hw(coil);
	143	if (ret)
	144	goto fail;
	145	}
	146	return 0;
	147
	148	fail:
3933186a	149	coil->standby = true;
bee3d511 PM	150	regulator_disable(coil->vana);
	151
	152	return ret;
	153	}
	154
	155	/*
	156	* V4L2 controls
	157	*/
	158	static int ad5820_set_ctrl(struct v4l2_ctrl *ctrl)
	159	{
	160	struct ad5820_device *coil =
	161	container_of(ctrl->handler, struct ad5820_device, ctrls);
	162
	163	switch (ctrl->id) {
	164	case V4L2_CID_FOCUS_ABSOLUTE:
	165	coil->focus_absolute = ctrl->val;
	166	return ad5820_update_hw(coil);
	167	}
	168
	169	return 0;
	170	}
	171
	172	static const struct v4l2_ctrl_ops ad5820_ctrl_ops = {
	173	.s_ctrl = ad5820_set_ctrl,
	174	};
	175
	176
	177	static int ad5820_init_controls(struct ad5820_device *coil)
	178	{
	179	v4l2_ctrl_handler_init(&coil->ctrls, 1);
	180
	181	/*
	182	* V4L2_CID_FOCUS_ABSOLUTE
	183	*
	184	* Minimum current is 0 mA, maximum is 100 mA. Thus, 1 code is
	185	* equivalent to 100/1023 = 0.0978 mA. Nevertheless, we do not use [mA]
	186	* for focus position, because it is meaningless for user. Meaningful
	187	* would be to use focus distance or even its inverse, but since the
	188	* driver doesn't have sufficiently knowledge to do the conversion, we
	189	* will just use abstract codes here. In any case, smaller value = focus
	190	* position farther from camera. The default zero value means focus at
	191	* infinity, and also least current consumption.
	192	*/
	193	v4l2_ctrl_new_std(&coil->ctrls, &ad5820_ctrl_ops,
	194	V4L2_CID_FOCUS_ABSOLUTE, 0, 1023, 1, 0);
	195
	196	if (coil->ctrls.error)
	197	return coil->ctrls.error;
	198
	199	coil->focus_absolute = 0;
	200	coil->focus_ramp_time = 0;
	201	coil->focus_ramp_mode = 0;
	202
	203	coil->subdev.ctrl_handler = &coil->ctrls;
	204
	205	return 0;
	206	}
	207
	208	/*
	209	* V4L2 subdev operations
	210	*/
	211	static int ad5820_registered(struct v4l2_subdev *subdev)
	212	{
	213	struct ad5820_device *coil = to_ad5820_device(subdev);
214
215	return ad5820_init_controls(coil);
216	}
217
218	static int
219	ad5820_set_power(struct v4l2_subdev *subdev, int on)
220	{
221	struct ad5820_device *coil = to_ad5820_device(subdev);
222	int ret = 0;
223
224	mutex_lock(&coil->power_lock);
225
226	/*
227	* If the power count is modified from 0 to != 0 or from != 0 to 0,
228	* update the power state.
229	*/
230	if (coil->power_count == !on) {
3933186a SA	231	ret = on ? ad5820_power_on(coil, true) :
3933186a SA	232	ad5820_power_off(coil, true);
bee3d511 PM	233	if (ret < 0)
	234	goto done;
	235	}
	236
	237	/* Update the power count. */
	238	coil->power_count += on ? 1 : -1;
	239	WARN_ON(coil->power_count < 0);
	240
	241	done:
	242	mutex_unlock(&coil->power_lock);
	243	return ret;
	244	}
	245
	246	static int ad5820_open(struct v4l2_subdev sd, struct v4l2_subdev_fh fh)
	247	{
	248	return ad5820_set_power(sd, 1);
	249	}
	250
	251	static int ad5820_close(struct v4l2_subdev sd, struct v4l2_subdev_fh fh)
	252	{
	253	return ad5820_set_power(sd, 0);
	254	}
	255
	256	static const struct v4l2_subdev_core_ops ad5820_core_ops = {
	257	.s_power = ad5820_set_power,
	258	};
	259
	260	static const struct v4l2_subdev_ops ad5820_ops = {
	261	.core = &ad5820_core_ops,
	262	};
	263
	264	static const struct v4l2_subdev_internal_ops ad5820_internal_ops = {
	265	.registered = ad5820_registered,
	266	.open = ad5820_open,
	267	.close = ad5820_close,
	268	};
	269
	270	/*
	271	* I2C driver
	272	*/
37f0644f	273	static int __maybe_unused ad5820_suspend(struct device *dev)
bee3d511 PM	274	{
	275	struct i2c_client *client = container_of(dev, struct i2c_client, dev);
	276	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
	277	struct ad5820_device *coil = to_ad5820_device(subdev);
	278
	279	if (!coil->power_count)
	280	return 0;
	281
3933186a	282	return ad5820_power_off(coil, false);
bee3d511 PM	283	}
bee3d511 PM	284
37f0644f	285	static int __maybe_unused ad5820_resume(struct device *dev)
bee3d511 PM	286	{
	287	struct i2c_client *client = container_of(dev, struct i2c_client, dev);
	288	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
	289	struct ad5820_device *coil = to_ad5820_device(subdev);
	290
	291	if (!coil->power_count)
	292	return 0;
	293
3933186a	294	return ad5820_power_on(coil, true);
bee3d511 PM	295	}
bee3d511 PM	296
bee3d511 PM	297	static int ad5820_probe(struct i2c_client *client,
	298	const struct i2c_device_id *devid)
	299	{
	300	struct ad5820_device *coil;
	301	int ret;
	302
	303	coil = devm_kzalloc(&client->dev, sizeof(*coil), GFP_KERNEL);
	304	if (!coil)
	305	return -ENOMEM;
	306
	307	coil->vana = devm_regulator_get(&client->dev, "VANA");
	308	if (IS_ERR(coil->vana)) {
	309	ret = PTR_ERR(coil->vana);
	310	if (ret != -EPROBE_DEFER)
	311	dev_err(&client->dev, "could not get regulator for vana\n");
	312	return ret;
	313	}
	314
	315	mutex_init(&coil->power_lock);
	316
	317	v4l2_i2c_subdev_init(&coil->subdev, client, &ad5820_ops);
	318	coil->subdev.flags \|= V4L2_SUBDEV_FL_HAS_DEVNODE;
	319	coil->subdev.internal_ops = &ad5820_internal_ops;
	320	strcpy(coil->subdev.name, "ad5820 focus");
	321
	322	ret = media_entity_pads_init(&coil->subdev.entity, 0, NULL);
	323	if (ret < 0)
	324	goto cleanup2;
	325
	326	ret = v4l2_async_register_subdev(&coil->subdev);
	327	if (ret < 0)
	328	goto cleanup;
	329
	330	return ret;
	331
	332	cleanup2:
	333	mutex_destroy(&coil->power_lock);
	334	cleanup:
	335	media_entity_cleanup(&coil->subdev.entity);
	336	return ret;
	337	}
	338
78cea55c	339	static int ad5820_remove(struct i2c_client *client)
bee3d511 PM	340	{
	341	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
	342	struct ad5820_device *coil = to_ad5820_device(subdev);
	343
586248a7	344	v4l2_async_unregister_subdev(&coil->subdev);
bee3d511 PM	345	v4l2_ctrl_handler_free(&coil->ctrls);
	346	media_entity_cleanup(&coil->subdev.entity);
	347	mutex_destroy(&coil->power_lock);
	348	return 0;
	349	}
	350
	351	static const struct i2c_device_id ad5820_id_table[] = {
	352	{ AD5820_NAME, 0 },
	353	{ }
	354	};
	355	MODULE_DEVICE_TABLE(i2c, ad5820_id_table);
	356
	357	static SIMPLE_DEV_PM_OPS(ad5820_pm, ad5820_suspend, ad5820_resume);
	358
	359	static struct i2c_driver ad5820_i2c_driver = {
	360	.driver = {
	361	.name = AD5820_NAME,
	362	.pm = &ad5820_pm,
	363	},
	364	.probe = ad5820_probe,
78cea55c	365	.remove = ad5820_remove,
bee3d511 PM	366	.id_table = ad5820_id_table,
	367	};
	368
	369	module_i2c_driver(ad5820_i2c_driver);
	370
	371	MODULE_AUTHOR("Tuukka Toivonen");
	372	MODULE_DESCRIPTION("AD5820 camera lens driver");
	373	MODULE_LICENSE("GPL");