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| author | Hans Verkuil <hverkuil@xs4all.nl> | 2007-09-12 15:32:50 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-01-26 00:01:16 +0300 |
| commit | 8ffbc6559493c64d6194c92d856196fdaeb8a5fb (patch) | |
| tree | b279073efa70f56cf6f0614a6a96374464e492ec /drivers/media/video/v4l2-common.c | |
| parent | 5ef4730d1bfe5be71ce54d927c510ad5da968854 (diff) | |
| download | linux-8ffbc6559493c64d6194c92d856196fdaeb8a5fb.tar.xz | |
V4L/DVB (6451): v4l2: add support for bus-based I2C drivers
Two new headers were added: one for I2C drivers that are only used
by V4L2 drivers converted to the new bus-based I2C API, and one that
can be used by both converted and unconverted drivers (at the expense of
some additional overhead).
To support the legacy I2C API a helper function was added to v4l2-common.c.
These headers take care of all the 'boilerplate' code that all V4L2 I2C drivers
have in common and will automatically support the bus-based I2C API introduced
in kernel 2.6.22.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/v4l2-common.c')
| -rw-r--r-- | drivers/media/video/v4l2-common.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/media/video/v4l2-common.c b/drivers/media/video/v4l2-common.c index a4d68d3ba5e4..32607a612b18 100644 --- a/drivers/media/video/v4l2-common.c +++ b/drivers/media/video/v4l2-common.c @@ -1013,6 +1013,35 @@ int v4l2_chip_match_host(u32 match_type, u32 match_chip) /* ----------------------------------------------------------------- */ +/* Helper function for I2C legacy drivers */ + +int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver *driver, + const char *name, int (*probe)(struct i2c_client *)) +{ + struct i2c_client *client; + int err; + + client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); + if (client == 0) + return -ENOMEM; + + client->addr = address; + client->adapter = adapter; + client->driver = driver; + snprintf(client->name, sizeof(client->name) - 1, name); + + err = probe(client); + if (err == 0) { + i2c_attach_client(client); + } + else { + kfree(client); + } + return err; +} + +/* ----------------------------------------------------------------- */ + EXPORT_SYMBOL(v4l2_norm_to_name); EXPORT_SYMBOL(v4l2_video_std_construct); @@ -1038,6 +1067,8 @@ EXPORT_SYMBOL(v4l2_chip_match_i2c_client); EXPORT_SYMBOL(v4l2_chip_ident_i2c_client); EXPORT_SYMBOL(v4l2_chip_match_host); +EXPORT_SYMBOL(v4l2_i2c_attach); + /* * Local variables: * c-basic-offset: 8 |