diff options
| 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 /arch | |
| parent | 9b8c0088404778a1291191cf140bcfea082f027c (diff) | |
| download | lwn-c27cb681ac1598352569f75cb19850a12b7ef102.tar.gz lwn-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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/plat-s3c24xx/gpio.c | 16 |
1 files changed, 16 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); |