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

[Alexandre Torgue]

Hi Linus,

On 09/07/2016 11:06 PM, Linus Walleij wrote:
> On Tue, Sep 6, 2016 at 6:45 PM, Alexandre TORGUE
> <alexandre.torgue@xxxxxx> 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@xxxxxxxxx>
> > Signed-off-by: Alexandre TORGUE <alexandre.torgue@xxxxxx>
>
> > +++ 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.

Thanks Linus for this review. I will send a V5.
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?

Regards

Alex

> 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