Commit c27cb681 authored by Ben Dooks's avatar Ben Dooks Committed by Russell King
Browse files

[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: default avatarBen Dooks <ben-linux@fluff.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 9b8c0088

arch/arm/plat-s3c24xx/gpio.c

+16 −0
Original line number Diff line number Diff line
@@ -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);

include/asm-arm/arch-s3c2410/hardware.h

+11 −0
Original line number Diff line number Diff line
@@ -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);