[RFC 3/4] dt-bindings: iio: add support for GPIO triggers

[Linus Walleij]

On Fri, Feb 17, 2017 at 5:03 PM, Fabrice Gasnier <fabrice.gasnier at st.com> wrote:

> Document Industrial I/O GPIO trigger support.
>
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier at st.com>
(...)
> +- gpio-trigger-rising-edge: A rising edge on GPIO will trigger.
> +- gpio-trigger-falling-edge: A falling edge on GPIO will trigger.
> +  Note: Both rising and falling edge may be used. In case none of
> +  rising or falling edge is selected, rising edge is selected by
> +  default.

We have GPIO_ACTIVE*_HIGH and GPIO_ACTIVE_LOW in the
gpios second cell already.

Can't we simply use that and specify that for this usecase, reading
that cell as GPIO_ACTIVE_HIGH == trigger on rising edge and
GPIO_ACTIVE_LOW == trigger on falling edge?

Yours,
Linus Walleij