[PATCH 2/7] ARM: S5P: Add GPIOlib gpio_to_irq for external interrupts

[ben-linux@fluff.org (Ben Dooks)]

On Thu, Jun 03, 2010 at 02:01:34PM +0900, Joonyoung Shim wrote:
> This patch is to support gpio_to_irq() of GPIOlib for external
> interrupts. The gpio_to_irq() calls s5p_gpiolib_eint_to_irq function.

How about each s3c_gpio_chip have a irq base in it?
 
> Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
> ---
>  arch/arm/plat-s5p/Makefile                     |    1 +
>  arch/arm/plat-s5p/gpiolib.c                    |   35 ++++++++++++++++++++++++
>  arch/arm/plat-samsung/include/plat/gpio-core.h |    2 +
>  3 files changed, 38 insertions(+), 0 deletions(-)
>  create mode 100644 arch/arm/plat-s5p/gpiolib.c
> 
> diff --git a/arch/arm/plat-s5p/Makefile b/arch/arm/plat-s5p/Makefile
> index 39c242b..f6e1a13 100644
> --- a/arch/arm/plat-s5p/Makefile
> +++ b/arch/arm/plat-s5p/Makefile
> @@ -15,6 +15,7 @@ obj-				:=
>  obj-y				+= dev-uart.o
>  obj-y				+= cpu.o
>  obj-y				+= clock.o
> +obj-y				+= gpiolib.o
>  obj-y				+= irq.o
>  obj-$(CONFIG_S5P_EXT_INT)	+= irq-eint.o
>  
> diff --git a/arch/arm/plat-s5p/gpiolib.c b/arch/arm/plat-s5p/gpiolib.c
> new file mode 100644
> index 0000000..0c27a9d
> --- /dev/null
> +++ b/arch/arm/plat-s5p/gpiolib.c
> @@ -0,0 +1,35 @@
> +/*
> + * linux/arch/arm/plat-s5p/gpiolib.c
> + *
> + * Copyright (C) 2010 Samsung Electronics Co.Ltd
> + * Author: Joonyoung Shim <jy0922.shim@samsung.com>
> + *
> + * S5P - GPIOlib support
> + *
> + *  This program is free software; you can redistribute  it and/or modify it
> + *  under  the terms of  the GNU General  Public License as published by the
> + *  Free Software Foundation;  either version 2 of the  License, or (at your
> + *  option) any later version.
> + *
> + */
> +
> +#include <linux/gpio.h>
> +#include <mach/irqs.h>
> +#include <mach/regs-gpio.h>
> +
> +/* be called from gpio_to_irq() for external interrupts */
> +int s5p_gpiolib_eint_to_irq(struct gpio_chip *chip, unsigned int offset)
> +{
> +	switch (chip->base) {
> +	case EINT_GPIO_0(0):
> +		return IRQ_EINT(offset);
> +	case EINT_GPIO_1(0):
> +		return IRQ_EINT(8 + offset);
> +	case EINT_GPIO_2(0):
> +		return IRQ_EINT(16 + offset);
> +	case EINT_GPIO_3(0):
> +		return IRQ_EINT(24 + offset);
> +	default:
> +		return -EINVAL;
> +	}
> +}
> diff --git a/arch/arm/plat-samsung/include/plat/gpio-core.h b/arch/arm/plat-samsung/include/plat/gpio-core.h
> index e358c7d..f6c5151 100644
> --- a/arch/arm/plat-samsung/include/plat/gpio-core.h
> +++ b/arch/arm/plat-samsung/include/plat/gpio-core.h
> @@ -121,6 +121,8 @@ extern void samsung_gpiolib_add_4bit2(struct s3c_gpio_chip *chip);
>  /* exported for core SoC support to change */
>  extern struct s3c_gpio_cfg s3c24xx_gpiocfg_default;
>  
> +extern int s5p_gpiolib_eint_to_irq(struct gpio_chip *chip, unsigned int offset);
> +
>  #ifdef CONFIG_S3C_GPIO_TRACK
>  extern struct s3c_gpio_chip *s3c_gpios[S3C_GPIO_END];
>  
> -- 
> 1.7.0.4
> 

-- 
-- 
Ben

Q:      What's a light-year?
A:      One-third less calories than a regular year.