[U-Boot] [PATCH] i.MX6: mx6qsabrelite: Add keypress support

Eric Nelson eric.nelson at boundarydevices.com
Sat Mar 3 16:35:00 CET 2012

On 03/03/2012 02:15 AM, Wolfgang Denk wrote:
> Dear Eric Nelson,
> In message<1330732824-15345-1-git-send-email-eric.nelson at boundarydevices.com>  you wrote:
>> This patch adds support for the GPIO keyboard used on MX6Q SabreLite.
>> This is generally used for invoking Android "recovery mode" in
>> response to a long press of volume key down during boot.
>> This can be tested by a boot script like so:
>>      if keypress voldown&&  sleep 1&&  keypress voldown ; then
>>            echo "do recovery thing" ;
>>      fi
>> Key values can be seen by issuing keypress with no arguments:
> I don't like introducing yet another way to handle key presses and
> create menu like interfaces from this.
> We already have two of these:
> - We have the powerful and flexible method to map key preesses to
>    envrionment variables which can in turn hold commands (variables
>    "magic_keys" and "key_magic*") as used for example on the enbw_cmc,
>    lwmon5, hmi1001, mucmc52, pcs440ep, r360mpi and mucmc52 boards.
> - We have the menu system as implemented by common/menu.c etc.
> Please use either of these, but don't invent a new one.  Thanks.

Thanks for the pointers. I'll rework accordingly.

Grepping the sources rarely results in this kind of insight.



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