linux-kernel - Re: [PATCH 3/3] gpio: regmap: Support a custom ->to

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Message-ID: <CAHp75Vc30zZL7LLg6zn7VnMARMOKsYo421KVMDu7RGp4QCtcXg@mail.gmail.com>
Date:   Sun, 3 Jul 2022 16:24:16 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Aidan MacDonald <aidanmacdonald.0x0@...il.com>
Cc:     Michael Walle <michael@...le.cc>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] gpio: regmap: Support a custom ->to_irq() hook

On Sun, Jul 3, 2022 at 1:11 PM Aidan MacDonald
<aidanmacdonald.0x0@...il.com> wrote:
>
> Some GPIO chips require a custom to_irq() callback for mapping
> their IRQs, eg. because their interrupts come from a parent IRQ
> chip where the GPIO offset doesn't map 1-to-1 with hwirq number.

Don't they follow a hierarchical IRQ domain in that case?

And to be honest after the commit ef38237444ce ("gpiolib: add a
warning on gpiochip->to_irq defined") I have no idea how it works in
your case and also I feel this patch is a wrong direction of
development.

-- 
With Best Regards,
Andy Shevchenko