[ARM] S3C24XX: Add gpio_to_irq implementation

Add to_irq field handlers for the GPIO banks that are configurable
as interripts.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/arch/arm/plat-s3c24xx/gpiolib.c b/arch/arm/plat-s3c24xx/gpiolib.c
index f95c6c9d9f1a..94a341aaa4e4 100644
--- a/arch/arm/plat-s3c24xx/gpiolib.c
+++ b/arch/arm/plat-s3c24xx/gpiolib.c
@@ -59,6 +59,22 @@ static int s3c24xx_gpiolib_banka_output(struct gpio_chip *chip,
         return 0;
 }
 
+static int s3c24xx_gpiolib_bankf_toirq(struct gpio_chip *chip, unsigned offset)
+{
+        if (offset < 4)
+                return IRQ_EINT0 + offset;
+        
+        if (offset < 8)
+                return IRQ_EINT4 + offset - 4;
+        
+        return -EINVAL;
+}
+
+static int s3c24xx_gpiolib_bankg_toirq(struct gpio_chip *chip, unsigned offset)
+{
+        return IRQ_EINT8 + offset;
+}
+
 struct s3c_gpio_chip s3c24xx_gpios[] = {
         [0] = {
                 .base   = S3C24XX_GPIO_BASE(S3C2410_GPA0),
@@ -114,6 +130,7 @@ struct s3c_gpio_chip s3c24xx_gpios[] = {
                         .owner                  = THIS_MODULE,
                         .label                  = "GPIOF",
                         .ngpio                  = 8,
+                        .to_irq                 = s3c24xx_gpiolib_bankf_toirq,
                 },
         },
         [6] = {
@@ -123,6 +140,7 @@ struct s3c_gpio_chip s3c24xx_gpios[] = {
                         .owner                  = THIS_MODULE,
                         .label                  = "GPIOG",
                         .ngpio                  = 10,
+                        .to_irq                 = s3c24xx_gpiolib_bankg_toirq,
                 },
         },
 };