linux-kernel - Re: [PATCH v1 3/6] gpio: realtek-otto: Support per-cpu interrupts

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Message-ID: <CACRpkdbSdDAKiFAsHBosdVDpBhWW-Keoq+t8GJ5LsyWjOZwp_g@mail.gmail.com>
Date:   Thu, 21 Apr 2022 01:04:16 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Sander Vanheule <sander@...nheule.net>,
        Marc Zyngier <maz@...nel.org>
Cc:     linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Bert Vermeulen <bert@...t.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 3/6] gpio: realtek-otto: Support per-cpu interrupts

On Sat, Apr 9, 2022 at 9:56 PM Sander Vanheule <sander@...nheule.net> wrote:

> On SoCs with multiple cores, it is possible that the GPIO interrupt
> controller supports assigning specific pins to one or more cores.
>
> IRQ balancing can be performed on a line-by-line basis if the parent
> interrupt is routed to all available cores, which is the default upon
> initialisation.
>
> Signed-off-by: Sander Vanheule <sander@...nheule.net>

That sounds complicated.

Sounds like something the IRQ maintainer (Marc Z) should
have a quick look at.

Yours,
Linus Walleij