[PATCH v10 15/21] V4L2: add a device pointer to struct v4l2_subdev

Guennadi Liakhovetski
2013-06-11T09:59:35Z

It is often useful to have simple means to get from a subdevice to the
underlying physical device. This patch adds such a pointer to struct
v4l2_subdev and sets it accordingly in the I2C and SPI cases.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
---
drivers/media/v4l2-core/v4l2-common.c | 2 ++
include/media/v4l2-subdev.h | 2 ++
2 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
index 3fed63f..accfec6 100644
--- a/drivers/media/v4l2-core/v4l2-common.c
+++ b/drivers/media/v4l2-core/v4l2-common.c
@@ -291,6 +291,7 @@ void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
sd->flags |= V4L2_SUBDEV_FL_IS_I2C;
/* the owner is the same as the i2c_client's driver owner */
sd->owner = client->driver->driver.owner;
+ sd->dev = &client->dev;
/* i2c_client and v4l2_subdev point to one another */
v4l2_set_subdevdata(sd, client);
i2c_set_clientdata(client, sd);
@@ -426,6 +427,7 @@ void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi,
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);
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index 5298d67..d8756fa 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -585,6 +585,8 @@ struct v4l2_subdev {
void *host_priv;
/* subdev device node */
struct video_device *devnode;
+ /* pointer to the physical device */
+ struct device *dev;
};

#define media_entity_to_v4l2_subdev(ent) \
--
1.7.2.5