m68knommu: add to_irq function so we can map gpios to external interrupts.

Singed-off-by: Steven King <sfking@fdwdc.com>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/arch/m68k/platform/coldfire/gpio.c b/arch/m68k/platform/coldfire/gpio.c
index 9cd2b5c70519..ab9ac4110877 100644
--- a/arch/m68k/platform/coldfire/gpio.c
+++ b/arch/m68k/platform/coldfire/gpio.c
@@ -147,6 +147,18 @@ void mcfgpio_free(struct gpio_chip *chip, unsigned offset)
         __mcfgpio_free(offset);
 }
 
+int mcfgpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+#if defined(MCFGPIO_IRQ_MIN)
+        if ((offset >= MCFGPIO_IRQ_MIN) && (offset < MCFGPIO_IRQ_MAX))
+#else
+        if (offset < MCFGPIO_IRQ_MAX)
+#endif
+                return MCFGPIO_IRQ_VECBASE + offset;
+        else
+                return -EINVAL;
+}
+
 struct bus_type mcfgpio_subsys = {
         .name           = "gpio",
         .dev_name       = "gpio",
@@ -160,6 +172,7 @@ static struct gpio_chip mcfgpio_chip = {
         .direction_output       = mcfgpio_direction_output,
         .get                    = mcfgpio_get_value,
         .set                    = mcfgpio_set_value,
+        .to_irq                 = mcfgpio_to_irq,
         .base                   = 0,
         .ngpio                  = MCFGPIO_PIN_MAX,
 };