mirror of
https://github.com/torvalds/linux.git
synced 2024-12-21 02:21:36 +00:00
cc14c00c47
As I2C and SPI parts of the V4L2 core got split, let's take the chance and solve the CodingStyle issues there, as reported by checkpatch --strict. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* v4l2-spi - SPI helpers for Video4Linux2
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <media/v4l2-common.h>
|
|
#include <media/v4l2-device.h>
|
|
|
|
void v4l2_spi_subdev_unregister(struct v4l2_subdev *sd)
|
|
{
|
|
struct spi_device *spi = v4l2_get_subdevdata(sd);
|
|
|
|
if (spi && !spi->dev.of_node && !spi->dev.fwnode)
|
|
spi_unregister_device(spi);
|
|
}
|
|
|
|
void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi,
|
|
const struct v4l2_subdev_ops *ops)
|
|
{
|
|
v4l2_subdev_init(sd, ops);
|
|
sd->flags |= V4L2_SUBDEV_FL_IS_SPI;
|
|
/* the owner is the same as the spi_device's driver owner */
|
|
sd->owner = spi->dev.driver->owner;
|
|
sd->dev = &spi->dev;
|
|
/* spi_device and v4l2_subdev point to one another */
|
|
v4l2_set_subdevdata(sd, spi);
|
|
spi_set_drvdata(spi, sd);
|
|
/* initialize name */
|
|
snprintf(sd->name, sizeof(sd->name), "%s %s",
|
|
spi->dev.driver->name, dev_name(&spi->dev));
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_spi_subdev_init);
|
|
|
|
struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev,
|
|
struct spi_master *master,
|
|
struct spi_board_info *info)
|
|
{
|
|
struct v4l2_subdev *sd = NULL;
|
|
struct spi_device *spi = NULL;
|
|
|
|
if (!v4l2_dev)
|
|
return NULL;
|
|
if (info->modalias[0])
|
|
request_module(info->modalias);
|
|
|
|
spi = spi_new_device(master, info);
|
|
|
|
if (!spi || !spi->dev.driver)
|
|
goto error;
|
|
|
|
if (!try_module_get(spi->dev.driver->owner))
|
|
goto error;
|
|
|
|
sd = spi_get_drvdata(spi);
|
|
|
|
/*
|
|
* Register with the v4l2_device which increases the module's
|
|
* use count as well.
|
|
*/
|
|
if (v4l2_device_register_subdev(v4l2_dev, sd))
|
|
sd = NULL;
|
|
|
|
/* Decrease the module use count to match the first try_module_get. */
|
|
module_put(spi->dev.driver->owner);
|
|
|
|
error:
|
|
/*
|
|
* If we have a client but no subdev, then something went wrong and
|
|
* we must unregister the client.
|
|
*/
|
|
if (!sd)
|
|
spi_unregister_device(spi);
|
|
|
|
return sd;
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_spi_new_subdev);
|