Re: gpio-mt7621 unroutable IRQs to bank0

[Thomas Gleixner <tglx@kernel.org>]

On Tue, May 05 2026 at 14:01, Linus Walleij wrote:
> On Sat, May 2, 2026 at 11:52 PM Vicente Bergas <vicencb@gmail.com> wrote:
>> As a way to prove that this is indeed the problem,
>> the following workaround makes it work.
>> It just inverts the sorting order of all matches,
>> so it picks Bank0 instead of Bank2.
>
> That's a tricksy bug, I can't exactly see where the issue
> is.
>
> I think to solve this you might need to allocate an external
> irqdomain that deal with the three different gpiochip
> instances when translating the irqs.

struct gpio_chip has this:

        /**
         * @of_node_instance_match:
         *
         * Determine if a chip is the right instance. Must be implemented by
         * any driver using more than one gpio_chip per device tree node.
         * Returns true if gc is the instance indicated by i (which is the
         * first cell in the phandles for GPIO lines and gpio-ranges).
         */
        bool (*of_node_instance_match)(struct gpio_chip *gc, unsigned int i);

That driver falls in the category and lacks that callback, no?

Thanks,

        tglx