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path: root/drivers/pinctrl/pinctrl-xway.c
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Diffstat (limited to 'drivers/pinctrl/pinctrl-xway.c')
-rw-r--r--drivers/pinctrl/pinctrl-xway.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-xway.c b/drivers/pinctrl/pinctrl-xway.c
index 412c6b78140a..a13f2b6f6fc0 100644
--- a/drivers/pinctrl/pinctrl-xway.c
+++ b/drivers/pinctrl/pinctrl-xway.c
@@ -1573,6 +1573,22 @@ static int xway_gpio_dir_out(struct gpio_chip *chip, unsigned int pin, int val)
return 0;
}
+/*
+ * gpiolib gpiod_to_irq callback function.
+ * Returns the mapped IRQ (external interrupt) number for a given GPIO pin.
+ */
+static int xway_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+ struct ltq_pinmux_info *info = dev_get_drvdata(chip->parent);
+ int i;
+
+ for (i = 0; i < info->num_exin; i++)
+ if (info->exin[i] == offset)
+ return ltq_eiu_get_irq(i);
+
+ return -1;
+}
+
static struct gpio_chip xway_chip = {
.label = "gpio-xway",
.direction_input = xway_gpio_dir_in,
@@ -1581,6 +1597,7 @@ static struct gpio_chip xway_chip = {
.set = xway_gpio_set,
.request = gpiochip_generic_request,
.free = gpiochip_generic_free,
+ .to_irq = xway_gpio_to_irq,
.base = -1,
};