[PATCH 1/2] include: dt-binding: input: create a DT header defining key codes.

Stephen Warren swarren at wwwdotorg.org
Thu Aug 8 13:25:27 EDT 2013

On 08/08/2013 11:13 AM, Dmitry Torokhov wrote:
> On Thu, Aug 08, 2013 at 10:41:20PM +0530, Laxman Dewangan wrote:
>> On Wednesday 07 August 2013 12:58 AM, Stephen Warren wrote:
>>> (CC'ing DT bindings maintainers too, hence quoting a bit of the patch)
>>> On 08/06/2013 08:12 AM, Laxman Dewangan wrote:
>>>> Many of Key device tree bindings uses the constant number as key code
>>>> which matches with kernel header key code and then comment as follows
>>>> for reference/better readability:
>>>> 	linux,code = <102>; /* KEY_HOME */
>>>> Create a DT header which defines all the key code so that DT key bindings
>>>> can use it as follows:
>>>> 	linux,code = <KEY_HOME>;
> I am uncomfortable that we are duplicating the whole list of keycodes
> here. Do you think we could split keycodes and other event codes from
> include/uapi/linux/input.h into include/uapi/linux/input-events.h and
> unclude it directly into DTS?

Device tree files can only include headers in include/dt-bindings.
Eventually/soon, all the DT files and the headers in the dt-bindings/
directory will be split out into a separate git tree, which does not
have access to include/uapi, or indeed any other Linux kernel header files.

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