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| author | Ben Dooks <ben-linux@fluff.org> | 2008-01-28 13:01:33 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-01-28 13:20:52 +0000 |
| commit | c27cb681ac1598352569f75cb19850a12b7ef102 (patch) | |
| tree | 16e88e3069e1727726f0bb3ce99659d5aa38bbca | |
| parent | 9b8c0088404778a1291191cf140bcfea082f027c (diff) | |
| download | linux-c27cb681ac1598352569f75cb19850a12b7ef102.tar.gz linux-c27cb681ac1598352569f75cb19850a12b7ef102.tar.bz2 linux-c27cb681ac1598352569f75cb19850a12b7ef102.zip | |
[ARM] 4793/1: S3C24XX: Add IRQ->GPIO pin mapping function
Add the reverse of s3c2410_gpio_getirq to convert
a IRQ number into a GPIO pin number.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/plat-s3c24xx/gpio.c | 16 | ||||
| -rw-r--r-- | include/asm-arm/arch-s3c2410/hardware.h | 11 |
2 files changed, 27 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c24xx/gpio.c b/arch/arm/plat-s3c24xx/gpio.c index 7cc6faec25d9..ee99dcc7f0bd 100644 --- a/arch/arm/plat-s3c24xx/gpio.c +++ b/arch/arm/plat-s3c24xx/gpio.c @@ -199,3 +199,19 @@ int s3c2410_gpio_getirq(unsigned int pin) } EXPORT_SYMBOL(s3c2410_gpio_getirq); + +int s3c2410_gpio_irq2pin(unsigned int irq) +{ + if (irq >= IRQ_EINT0 && irq <= IRQ_EINT3) + return S3C2410_GPF0 + (irq - IRQ_EINT0); + + if (irq >= IRQ_EINT4 && irq <= IRQ_EINT7) + return S3C2410_GPF4 + (irq - IRQ_EINT4); + + if (irq >= IRQ_EINT8 && irq <= IRQ_EINT23) + return S3C2410_GPG0 + (irq - IRQ_EINT8); + + return -EINVAL; +} + +EXPORT_SYMBOL(s3c2410_gpio_irq2pin); diff --git a/include/asm-arm/arch-s3c2410/hardware.h b/include/asm-arm/arch-s3c2410/hardware.h index 20509e4540f6..29592c3ebf22 100644 --- a/include/asm-arm/arch-s3c2410/hardware.h +++ b/include/asm-arm/arch-s3c2410/hardware.h @@ -50,6 +50,17 @@ extern unsigned int s3c2410_gpio_getcfg(unsigned int pin); extern int s3c2410_gpio_getirq(unsigned int pin); +/* s3c2410_gpio_irq2pin + * + * turn the given irq number into the corresponding GPIO number + * + * returns: + * < 0 = no pin + * >=0 = gpio pin number +*/ + +extern int s3c2410_gpio_irq2pin(unsigned int irq); + #ifdef CONFIG_CPU_S3C2400 extern int s3c2400_gpio_getirq(unsigned int pin); |