diff --git a/drivers/gpio/gpio-grgpio.c b/drivers/gpio/gpio-grgpio.c
index 8e08b8647655..84d2478ec294 100644
--- a/drivers/gpio/gpio-grgpio.c
+++ b/drivers/gpio/gpio-grgpio.c
@@ -235,8 +235,8 @@ static irqreturn_t grgpio_irq_handler(int irq, void *dev)
  * This function will be called as a consequence of the call to
  * irq_create_mapping in grgpio_to_irq
  */
-int grgpio_irq_map(struct irq_domain *d, unsigned int irq,
-		   irq_hw_number_t hwirq)
+static int grgpio_irq_map(struct irq_domain *d, unsigned int irq,
+			  irq_hw_number_t hwirq)
 {
 	struct grgpio_priv *priv = d->host_data;
 	struct grgpio_lirq *lirq;
@@ -291,7 +291,7 @@ int grgpio_irq_map(struct irq_domain *d, unsigned int irq,
 	return ret;
 }
 
-void grgpio_irq_unmap(struct irq_domain *d, unsigned int irq)
+static void grgpio_irq_unmap(struct irq_domain *d, unsigned int irq)
 {
 	struct grgpio_priv *priv = d->host_data;
 	int index;