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[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>
hifive-unleashed-5.1
Ben Dooks 2008-01-28 13:01:33 +01:00 committed by Russell King
parent 9b8c008840
commit c27cb681ac
2 changed files with 27 additions and 0 deletions
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16
arch/arm/plat-s3c24xx/gpio.c
View File

@ -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);

11
include/asm-arm/arch-s3c2410/hardware.h
View File

@ -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);