Re: [PATCH v3 2/7] gpio: gpio-ep93xx: Fix single irqchip with multi gpiochips

[Andy Shevchenko <andy.shevchenko@gmail.com>]

On Thu, Jan 28, 2021 at 2:21 PM Nikita Shubin <nikita.shubin@maquefel.me> wrote:
>
> Fixes the following warnings which results in interrupts disabled on
> port B/F:
>
> gpio gpiochip1: (B): detected irqchip that is shared with multiple gpiochips: please fix the driver.
> gpio gpiochip5: (F): detected irqchip that is shared with multiple gpiochips: please fix the driver.
>
> - added separate irqchip for each interrupt capable gpiochip
> - provided unique names for each irqchip
> - reworked ep93xx_gpio_port to make it usable before chip_add_data
>   in ep93xx_init_irq_chips
>
> Fixes: d2b091961510 ("gpio: ep93xx: Pass irqchip when adding gpiochip")
> Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>

...

> +#define EP93XX_GPIO_IRQ_CHIPS_NUM 3
> +
>  struct ep93xx_gpio {
>         void __iomem            *base;
>         struct gpio_chip        gc[8];
> +       struct irq_chip         ic[EP93XX_GPIO_IRQ_CHIPS_NUM];
>  };

>  /* Port ordering is: A B F */
> +static const char * const irq_chip_names[] = {
> +       "gpio-irq-a",
> +       "gpio-irq-b",
> +       "gpio-irq-f",
> +};

Depending on the solution from the previous patch I would also go here
rather with holes, than messing up with mapping between port index and
index in this array.

-- 
With Best Regards,
Andy Shevchenko