ARM: 7041/1: gpio-ep93xx: hookup the to_irq callback in the driver

Remove the ep93xx machine specific dependencies for gpio_to_irq() by
hooking up the callback in the driver and using __gpio_to_irq.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 18 insertions, 1 deletions

diff --git a/drivers/gpio/gpio-ep93xx.c b/drivers/gpio/gpio-ep93xx.c
index 72fb9c665320..fbd6a6066777 100644
--- a/drivers/gpio/gpio-ep93xx.c
+++ b/drivers/gpio/gpio-ep93xx.c
@@ -307,6 +307,21 @@ static int ep93xx_gpio_set_debounce(struct gpio_chip *chip,
         return 0;
 }
 
+/*
+ * Map GPIO A0..A7  (0..7)  to irq 64..71,
+ *          B0..B7  (7..15) to irq 72..79, and
+ *          F0..F7 (16..24) to irq 80..87.
+ */
+static int ep93xx_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+        int gpio = chip->base + offset;
+
+        if (gpio > EP93XX_GPIO_LINE_MAX_IRQ)
+                return -EINVAL;
+
+        return 64 + gpio;
+}
+
 static int ep93xx_gpio_add_bank(struct bgpio_chip *bgc, struct device *dev,
         void __iomem *mmio_base, struct ep93xx_gpio_bank *bank)
 {
@@ -321,8 +336,10 @@ static int ep93xx_gpio_add_bank(struct bgpio_chip *bgc, struct device *dev,
         bgc->gc.label = bank->label;
         bgc->gc.base = bank->base;
 
-        if (bank->has_debounce)
+        if (bank->has_debounce) {
                 bgc->gc.set_debounce = ep93xx_gpio_set_debounce;
+                bgc->gc.to_irq = ep93xx_gpio_to_irq;
+        }
 
         return gpiochip_add(&bgc->gc);
 }