Blackfin: GPIO: implement to_irq handler

This makes it possible to support IRQs coming from off-chip GPIO
controllers.

Signed-off-by: Joachim Eastwood <joachim.eastwood@jotron.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c
index 0dd9cf913503..6dcb344001f0 100644
--- a/arch/blackfin/kernel/bfin_gpio.c
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -1319,6 +1319,11 @@ void bfin_gpiolib_gpio_free(struct gpio_chip *chip, unsigned gpio)
         return bfin_gpio_free(gpio);
 }
 
+int bfin_gpiolib_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
+{
+        return gpio + GPIO_IRQ_BASE;
+}
+
 static struct gpio_chip bfin_chip = {
         .label                  = "BFIN-GPIO",
         .direction_input        = bfin_gpiolib_direction_input,
@@ -1327,6 +1332,7 @@ static struct gpio_chip bfin_chip = {
         .set                    = bfin_gpiolib_set_value,
         .request                = bfin_gpiolib_gpio_request,
         .free                   = bfin_gpiolib_gpio_free,
+        .to_irq                 = bfin_gpiolib_gpio_to_irq,
         .base                   = 0,
         .ngpio                  = MAX_BLACKFIN_GPIOS,
 };