[PATCH v3] pinctrl: sunxi: fix gpiochip_lock_as_irq() failure when pinmux is unknown

[Linus Walleij]

On Sat, Mar 14, 2026 at 9:10 AM Michal Piekos
<michal.piekos at mmpsystems.pl> wrote:

> Fixes kernel hang during boot due to inability to set up IRQ on AXP313a.
>
> The issue is caused by gpiochip_lock_as_irq() which is failing when gpio
> is in unitialized state.
>
> Solution is to set pinmux to GPIO INPUT in
> sunxi_pinctrl_irq_request_resources() if it wasn't initialized
> earlier.
>
> Tested on Orange Pi Zero 3.
>
> Signed-off-by: Michal Piekos <michal.piekos at mmpsystems.pl>
> Suggested-by: Chen-Yu Tsai <wens at kernel.org>

Should this have a Fixes: tag and should it be applied as an urgent fix?

Tag for stable?

Also: is there consensus with Andre that this is the way to proceed?

Yours,
Linus Walleij