[PATCH 3/5] ARM: S5PC110: gpio_to_irq support on external interrupt

[Kyungmin Park]

I think it's also bug fix since current external IRQ can't support
'gpio_to_irq' feature.
I hope it's included at this rc window.

On Thu, Aug 5, 2010 at 4:25 PM, Kyungmin Park <kmpark at infradead.org> wrote:
> From: Kyungmin Park <kyungmin.park at samsung.com>
>
> Using group field, it can calculate the related irq number easily.
> Also if don't support gpio_to_irq, it can't use the gpio functionaliy fully.
> e.g., can't use the gpio-keys and so on
>
> Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
> ---
>  arch/arm/mach-s5pv210/gpiolib.c |   12 ++++++++++++
>  1 files changed, 12 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-s5pv210/gpiolib.c b/arch/arm/mach-s5pv210/gpiolib.c
> index f6a32c4..bd24c81 100644
> --- a/arch/arm/mach-s5pv210/gpiolib.c
> +++ b/arch/arm/mach-s5pv210/gpiolib.c
> @@ -246,6 +246,15 @@ static struct s3c_gpio_chip s5pv210_gpio_4bit[] = {
>        },
>  };
>
> +static int s5pv210_extint_to_irq(struct gpio_chip *gpio, unsigned int offset)
> +{
> +       struct s3c_gpio_chip *chip = to_s3c_gpio(gpio);
> +       int irq;
> +
> +       irq = (chip->group * 8) + offset;
> +       return IRQ_EINT(irq);
> +}
> +
>  static __init int s5pv210_gpiolib_init(void)
>  {
>        struct s3c_gpio_chip *chip = s5pv210_gpio_4bit;
> @@ -257,6 +266,9 @@ static __init int s5pv210_gpiolib_init(void)
>                        chip->config = &gpio_cfg;
>                if (chip->config == &gpio_cfg_extint) {
>                        chip->base = S5PV210_BANK_BASE(extint) + EXTINT_OFFSET;
> +                       /* Assign the external GPIO interrupt group number */
> +                       chip->group = extint;
> +                       chip->chip.to_irq = s5pv210_extint_to_irq;
>                        extint++;
>                }
>                if (chip->base == NULL)
> --
> 1.5.3.3
>
>
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