--- zzzz-none-000/linux-3.10.107/arch/mips/rb532/gpio.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/mips/rb532/gpio.c	2021-02-04 17:41:59.000000000 +0000
@@ -79,7 +79,7 @@
  */
 static inline int rb532_get_bit(unsigned offset, void __iomem *ioaddr)
 {
-	return (readl(ioaddr) & (1 << offset));
+	return readl(ioaddr) & (1 << offset);
 }
 
 /*
@@ -140,6 +140,11 @@
 	return 0;
 }
 
+static int rb532_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
+{
+	return 8 + 4 * 32 + gpio;
+}
+
 static struct rb532_gpio_chip rb532_gpio_chip[] = {
 	[0] = {
 		.chip = {
@@ -148,6 +153,7 @@
 			.direction_output	= rb532_gpio_direction_output,
 			.get			= rb532_gpio_get,
 			.set			= rb532_gpio_set,
+			.to_irq			= rb532_gpio_to_irq,
 			.base			= 0,
 			.ngpio			= 32,
 		},