Re: [PATCH] pinctrl: armada-37xx: Add edge both type gpio irq support

[Linus Walleij]

On Thu, Oct 19, 2017 at 3:10 PM, Gregory CLEMENT
<gregory.clement@xxxxxxxxxxxxxxxxxx> wrote:

> From: Ken Ma <make@xxxxxxxxxxx>
>
> Current edge both type gpio irqs which need to swap polarity in each
> interrupt are not supported, this patch adds edge both type gpio irq
> support.
>
> Signed-off-by: Ken Ma <make@xxxxxxxxxxx>
> Signed-off-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>

Patch applied.

The discussion here is interesting, it is customary for GPIO drivers
to implement double-edge detection emulation by swapping the
edge detector around like this.

It might be possible to collect some generic information about
this in the Documentation/gpio/driver.txt document.

Yours,
Linus Walleij