diff --git a/drivers/gpio/gpio-altera.c b/drivers/gpio/gpio-altera.c
index 9f2e6b0..b7932ec 100644
--- a/drivers/gpio/gpio-altera.c
+++ b/drivers/gpio/gpio-altera.c
@@ -24,6 +24,7 @@
 * @interrupt_trigger	: specifies the hardware configured IRQ trigger type
 *			  (rising, falling, both, high)
 * @mapped_irq		: kernel mapped irq number.
+* @irq_chip		: IRQ chip configuration
 */
 struct altera_gpio_chip {
 	struct of_mm_gpio_chip mmchip;
@@ -69,7 +70,7 @@
 	raw_spin_unlock_irqrestore(&altera_gc->gpio_lock, flags);
 }
 
-/**
+/*
  * This controller's IRQ type is synthesized in hardware, so this function
  * just checks if the requested set_type matches the synthesized IRQ type
  */
@@ -266,7 +267,7 @@
 	altera_gc->mmchip.gc.owner		= THIS_MODULE;
 	altera_gc->mmchip.gc.parent		= &pdev->dev;
 
-	altera_gc->mapped_irq = platform_get_irq(pdev, 0);
+	altera_gc->mapped_irq = platform_get_irq_optional(pdev, 0);
 
 	if (altera_gc->mapped_irq < 0)
 		goto skip_irq;