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-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)
}
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);