linux-imx

/*

 * V4L2 asynchronous subdevice registration API

 *

 * Copyright (C) 2012-2013, Guennadi Liakhovetski <g.liakhovetski@gmx.de>

 *

 * 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.

 */

​

#include <linux/device.h>

#include <linux/err.h>

#include <linux/i2c.h>

#include <linux/list.h>

#include <linux/mm.h>

#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

#include <linux/types.h>

​

#include <media/v4l2-async.h>

#include <media/v4l2-device.h>

#include <media/v4l2-fwnode.h>

#include <media/v4l2-subdev.h>

​

static int v4l2_async_notifier_call_bound(struct v4l2_async_notifier *n,

                      struct v4l2_subdev *subdev,

                      struct v4l2_async_subdev *asd)

{

    if (!n->ops || !n->ops->bound)

        return 0;

​

    return n->ops->bound(n, subdev, asd);

}

​

static void v4l2_async_notifier_call_unbind(struct v4l2_async_notifier *n,

                        struct v4l2_subdev *subdev,

                        struct v4l2_async_subdev *asd)

{

    if (!n->ops || !n->ops->unbind)

        return;

​

    n->ops->unbind(n, subdev, asd);

}

​

static int v4l2_async_notifier_call_complete(struct v4l2_async_notifier *n)

{

    if (!n->ops || !n->ops->complete)

        return 0;

​

    return n->ops->complete(n);

}

​

static bool match_i2c(struct v4l2_subdev *sd, struct v4l2_async_subdev *asd)

{

#if IS_ENABLED(CONFIG_I2C)

    struct i2c_client *client = i2c_verify_client(sd->dev);

​

    return client &&

        asd->match.i2c.adapter_id == client->adapter->nr &&

        asd->match.i2c.address == client->addr;