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authorBen Dooks <ben-linux@fluff.org>2008-01-28 07:01:33 -0500
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-01-28 08:20:52 -0500
commitc27cb681ac1598352569f75cb19850a12b7ef102 (patch)
tree16e88e3069e1727726f0bb3ce99659d5aa38bbca
parent9b8c0088404778a1291191cf140bcfea082f027c (diff)
[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.c16
-rw-r--r--include/asm-arm/arch-s3c2410/hardware.h11
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)
199} 199}
200 200
201EXPORT_SYMBOL(s3c2410_gpio_getirq); 201EXPORT_SYMBOL(s3c2410_gpio_getirq);
202
203int s3c2410_gpio_irq2pin(unsigned int irq)
204{
205 if (irq >= IRQ_EINT0 && irq <= IRQ_EINT3)
206 return S3C2410_GPF0 + (irq - IRQ_EINT0);
207
208 if (irq >= IRQ_EINT4 && irq <= IRQ_EINT7)
209 return S3C2410_GPF4 + (irq - IRQ_EINT4);
210
211 if (irq >= IRQ_EINT8 && irq <= IRQ_EINT23)
212 return S3C2410_GPG0 + (irq - IRQ_EINT8);
213
214 return -EINVAL;
215}
216
217EXPORT_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);
50 50
51extern int s3c2410_gpio_getirq(unsigned int pin); 51extern int s3c2410_gpio_getirq(unsigned int pin);
52 52
53/* s3c2410_gpio_irq2pin
54 *
55 * turn the given irq number into the corresponding GPIO number
56 *
57 * returns:
58 * < 0 = no pin
59 * >=0 = gpio pin number
60*/
61
62extern int s3c2410_gpio_irq2pin(unsigned int irq);
63
53#ifdef CONFIG_CPU_S3C2400 64#ifdef CONFIG_CPU_S3C2400
54 65
55extern int s3c2400_gpio_getirq(unsigned int pin); 66extern int s3c2400_gpio_getirq(unsigned int pin);