linux-kernel - Re: [PATCH v4 6/9] pinctrl: Add IRQ support to STM32 gpios

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Date:   Mon, 12 Sep 2016 14:58:34 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Alexandre Torgue <alexandre.torgue@...com>
Cc:     Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Bruno Herrera <bruherrera@...il.com>,
        Lee Jones <lee.jones@...aro.org>
Subject: Re: [PATCH v4 6/9] pinctrl: Add IRQ support to STM32 gpios

On Thu, Sep 8, 2016 at 5:47 PM, Alexandre Torgue
<alexandre.torgue@...com> wrote:

> Just one question, when you say "super-complex irqchip in use", do you mean
> I could use another (simplest) solution to handle this EXTI controller?

I don't know, GPIOLIB_IRQCHIP is to be used for some specific
cases documented in Documentation/gpio/driver.txt.

For anything complex, we either need to have this hairy code
or invent new abstractions.

For now, I assume this is needed...

Yours,
Linus Walleij