[Buildroot] [PATCH] i2c-tools: Add i2c-dev.h to staging directory for userspace i2c drivers.

[Nikula Jouko]

From: buildroot-bounces at busybox.net [mailto:buildroot-bounces at busybox.net] On Behalf Of Will Wagner
Sent: 24. syyskuuta 2013 19:46

>> This header is already part of the kernel headers, so it should 
>> already be part of the toolchain. Do you have a specific case where 
>> this header is missing?

>The contents of the header are different, the one from i2c-tools contains more.

Yes. In the kernel documentation (Documentation/i2c/dev-interface) it is explained as follows:

"So let's say you want to access an i2c adapter from a C program. The
first thing to do is "#include <linux/i2c-dev.h>". Please note that
there are two files named "i2c-dev.h" out there, one is distributed
with the Linux kernel and is meant to be included from kernel
driver code, the other one is distributed with i2c-tools and is
meant to be included from user-space programs. You obviously want
the second one here."

>We also carry a patch similar to this. Our patch has an addition which is a dependency on linux (assuming it is selected in the config). This ensures that the >header from the kernel gets over ridden by the one from i2c-tools and not the other way around.

Makes sense. Could this patch be mainlined, instead of what I sent?

Regards
	- Jouko