gpiolib: Implement gpio_to_irq() for wm831x

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/drivers/gpio/wm831x-gpio.c b/drivers/gpio/wm831x-gpio.c
index f5e4934..b4468b6 100644 (file)
--- a/drivers/gpio/wm831x-gpio.c
+++ b/drivers/gpio/wm831x-gpio.c
@@ -22,6 +22,7 @@
 #include <linux/mfd/wm831x/core.h>
 #include <linux/mfd/wm831x/pdata.h>
 #include <linux/mfd/wm831x/gpio.h>
+#include <linux/mfd/wm831x/irq.h>
 
 struct wm831x_gpio {
        struct wm831x *wm831x;
@@ -78,6 +79,17 @@ static void wm831x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
                        value << offset);
 }
 
+static int wm831x_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+       struct wm831x_gpio *wm831x_gpio = to_wm831x_gpio(chip);
+       struct wm831x *wm831x = wm831x_gpio->wm831x;
+
+       if (!wm831x->irq_base)
+               return -EINVAL;
+
+       return wm831x->irq_base + WM831X_IRQ_GPIO_1 + offset;
+}
+
 #ifdef CONFIG_DEBUG_FS
 static void wm831x_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 {
@@ -173,6 +185,7 @@ static struct gpio_chip template_chip = {
        .get                    = wm831x_gpio_get,
        .direction_output       = wm831x_gpio_direction_out,
        .set                    = wm831x_gpio_set,
+       .to_irq                 = wm831x_gpio_to_irq,
        .dbg_show               = wm831x_gpio_dbg_show,
        .can_sleep              = 1,
 };