gpiolib: Implement gpio_to_irq for WM8994 GPIO controller

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/gpio/wm8994-gpio.c b/drivers/gpio/wm8994-gpio.c
index de28b4a470eaf8b188ea27941455276af4767051..3ee35badcf1d0b26554cf7b3aed1e4253de128e0 100644 (file)
--- a/drivers/gpio/wm8994-gpio.c
+++ b/drivers/gpio/wm8994-gpio.c
@@ -80,6 +80,18 @@ static void wm8994_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
        wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset, WM8994_GPN_LVL, value);
 }
 
+static int wm8994_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+       struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip);
+       struct wm8994 *wm8994 = wm8994_gpio->wm8994;
+
+       if (!wm8994->irq_base)
+               return -EINVAL;
+
+       return wm8994->irq_base + offset;
+}
+
+
 #ifdef CONFIG_DEBUG_FS
 static void wm8994_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 {