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

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Date:   Wed, 7 Sep 2016 23:06:12 +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 Tue, Sep 6, 2016 at 6:45 PM, Alexandre TORGUE
<alexandre.torgue@...com> wrote:

> This patch adds IRQ support to STM32 gpios.
>
> The EXTI controller has 16 lines dedicated to GPIOs.
> EXTI line n can be connected to only line n of one of the GPIO ports, for
> example EXTI0 can be connected to either PA0, or PB0, or PC0...
> This port selection is done by specifying the port number into System
> Config registers.
>
> Signed-off-by: Maxime Coquelin <mcoquelin.stm32@...il.com>
> Signed-off-by: Alexandre TORGUE <alexandre.torgue@...com>

> +++ b/drivers/pinctrl/stm32/Kconfig
> @@ -6,6 +6,8 @@ config PINCTRL_STM32
>         select PINMUX
>         select GENERIC_PINCONF
>         select GPIOLIB
> +       select GPIOLIB_IRQCHIP

But you're not really using GPIOLIB_IRQCHIP. You have a different,
super-complex irqchip in use.

So just don't select this.

> +       bank->gpio_chip.irqdomain = irq_domain_create_hierarchy(pctl->domain,
> +                                       0, STM32_GPIO_IRQ_LINE, bank->fwnode,
> +                                       &stm32_gpio_domain_ops, bank);

Don't use that irqdomain pointer inside the gpio_chip.

Instead declare the irqdomain pointer inside struct stm32_gpio_bank
or something like that.

Yours,
Linus Walleij