Re: [PATCH v2 4/8] pinctrl: renesas: rzt2h: add GPIO IRQ chip to handle interrupts

[Linus Walleij]

On Fri, Dec 5, 2025 at 4:03 PM Cosmin Tanislav
<cosmin-gabriel.tanislav.xa@xxxxxxxxxxx> wrote:

> The Renesas RZ/T2H (R9A09G077) and Renesas RZ/N2H (R9A09G087) SoCs have
> IRQ-capable pins handled by the ICU, which forwards them to the GIC.
>
> The ICU supports 16 IRQ lines, the pins map to these lines arbitrarily,
> and the mapping is not configurable.
>
> Add a GPIO IRQ chip to the pin controller that can be used to configure
> these pins as IRQ lines.
>
> The pin controller places the requested pins into IRQ function,
> disabling GPIO mode. A hierarchical IRQ domain is used to forward other
> functionality to the parent IRQ domain, the ICU. The ICU does level
> translation and then forwards other functionality to the GIC.
>
> Wakeup capability is implemented by placing the entire pin controller on
> the wakeup path if any pins are requested to be wakeup-capable.
>
> Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@xxxxxxxxxxx>

Reviewed-by: Linus Walleij <linusw@xxxxxxxxxx>

Yours,
Linus Walleij