Hi Laurent,
On Mon, Nov 14, 2016 at 2:41 PM, Laurent Pinchart
<laurent.pinchart@xxxxxxxxxxxxxxxx> wrote:
> On Monday 14 Nov 2016 14:35:26 Geert Uytterhoeven wrote:
>> The main reason I haven't sent out a similar series yet is because the GPIOs
>> used for the 3 push buttons are shared with the 3 user LEDs. For each of
>> them, you have to choose at DT time if you want to use them as buttons or
>> as LEDs.
>>
>> On ULCB, the same issue is present. For those, we settled on 1 key and 2
>> LEDs...
>>
>> Looking forward to more comments...
>
> In theory the GPIOs could be shared by the gpio-keys and LED drivers in open-
> drain mode. I'm not sure the GPIO subsystem supports that though.
Been there, done that, cfr. "[RFD] Sharing GPIOs for input (buttons) and
output (LEDs)". The result wasn't pretty...
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
