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authorHans Verkuil <hverkuil@xs4all.nl>2008-10-13 07:38:03 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2008-10-17 17:20:20 -0300
commit7b31b57a37ab694b9693a0359bf8ed0967188533 (patch)
treed8733e2944bfe219f19aaf9f99f5b33806299ff0
parent23848b655ab5fc2fe88ef99e90ad8e4c41304d76 (diff)
V4L/DVB (9209): v4l2: add comment to the v4l2-i2c-drv headers.
Looking at these headers as they appear in the kernel makes you wonder why it is done that way. Refer to the v4l-dvb repository where the full unstripped header can be found to understand the reasoning behind this. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r--include/media/v4l2-i2c-drv-legacy.h11
-rw-r--r--include/media/v4l2-i2c-drv.h11
2 files changed, 22 insertions, 0 deletions
diff --git a/include/media/v4l2-i2c-drv-legacy.h b/include/media/v4l2-i2c-drv-legacy.h
index 975ffbf4e2c..e65dd9d84e8 100644
--- a/include/media/v4l2-i2c-drv-legacy.h
+++ b/include/media/v4l2-i2c-drv-legacy.h
@@ -21,6 +21,17 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+/* NOTE: the full version of this header is in the v4l-dvb repository
+ * and allows v4l i2c drivers to be compiled on older kernels as well.
+ * The version of this header as it appears in the kernel is a stripped
+ * version (without all the backwards compatibility stuff) and so it
+ * looks a bit odd.
+ *
+ * If you look at the full version then you will understand the reason
+ * for introducing this header since you really don't want to have all
+ * the tricky backwards compatibility code in each and every i2c driver.
+ */
+
struct v4l2_i2c_driver_data {
const char * const name;
int driverid;
diff --git a/include/media/v4l2-i2c-drv.h b/include/media/v4l2-i2c-drv.h
index 40ecef29801..efdc8bf27f8 100644
--- a/include/media/v4l2-i2c-drv.h
+++ b/include/media/v4l2-i2c-drv.h
@@ -21,6 +21,17 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+/* NOTE: the full version of this header is in the v4l-dvb repository
+ * and allows v4l i2c drivers to be compiled on older kernels as well.
+ * The version of this header as it appears in the kernel is a stripped
+ * version (without all the backwards compatibility stuff) and so it
+ * looks a bit odd.
+ *
+ * If you look at the full version then you will understand the reason
+ * for introducing this header since you really don't want to have all
+ * the tricky backwards compatibility code in each and every i2c driver.
+ */
+
#ifndef __V4L2_I2C_DRV_H__
#define __V4L2_I2C_DRV_H__