linux/include/media/soc_camera_platform.h
Guennadi Liakhovetski ec0c8d555a [media] V4L: soc_camera_platform: add helper functions to manage device instances
Add helper inline functions to correctly manage dynamic allocation and
freeing of platform devices. This avoids the ugly code to nullify
device objects.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-05-20 07:26:14 -03:00

79 lines
1.7 KiB
C

/*
* Generic Platform Camera Driver Header
*
* Copyright (C) 2008 Magnus Damm
*
* 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.
*/
#ifndef __SOC_CAMERA_H__
#define __SOC_CAMERA_H__
#include <linux/videodev2.h>
#include <media/soc_camera.h>
struct device;
struct soc_camera_platform_info {
const char *format_name;
unsigned long format_depth;
struct v4l2_mbus_framefmt format;
unsigned long bus_param;
struct device *dev;
int (*set_capture)(struct soc_camera_platform_info *info, int enable);
};
static inline void soc_camera_platform_release(struct platform_device **pdev)
{
*pdev = NULL;
}
static inline int soc_camera_platform_add(const struct soc_camera_link *icl,
struct device *dev,
struct platform_device **pdev,
struct soc_camera_link *plink,
void (*release)(struct device *dev),
int id)
{
struct soc_camera_platform_info *info = plink->priv;
int ret;
if (icl != plink)
return -ENODEV;
if (*pdev)
return -EBUSY;
*pdev = platform_device_alloc("soc_camera_platform", id);
if (!*pdev)
return -ENOMEM;
info->dev = dev;
(*pdev)->dev.platform_data = info;
(*pdev)->dev.release = release;
ret = platform_device_add(*pdev);
if (ret < 0) {
platform_device_put(*pdev);
*pdev = NULL;
info->dev = NULL;
}
return ret;
}
static inline void soc_camera_platform_del(const struct soc_camera_link *icl,
struct platform_device *pdev,
const struct soc_camera_link *plink)
{
if (icl != plink || !pdev)
return;
platform_device_unregister(pdev);
}
#endif /* __SOC_CAMERA_H__ */