ARM: sa1111: add sa1111_get_irq()

Add a helper function to get the irq number for a device.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

arch/arm/common/sa1111.c

@@ -1357,6 +1357,14 @@ void sa1111_disable_device(struct sa1111_dev *sadev)
 }
 EXPORT_SYMBOL(sa1111_disable_device);
 
+int sa1111_get_irq(struct sa1111_dev *sadev, unsigned num)
+{
+	if (num >= ARRAY_SIZE(sadev->irq))
+		return -EINVAL;
+	return sadev->irq[num];
+}
+EXPORT_SYMBOL_GPL(sa1111_get_irq);
+
 /*
  *	SA1111 "Register Access Bus."
  *

arch/arm/include/asm/hardware/sa1111.h

@@ -446,6 +446,8 @@ struct sa1111_driver {
 int sa1111_enable_device(struct sa1111_dev *);
 void sa1111_disable_device(struct sa1111_dev *);
 
+int sa1111_get_irq(struct sa1111_dev *, unsigned num);
+
 unsigned int sa1111_pll_clock(struct sa1111_dev *);
 
 #define SA1111_AUDIO_ACLINK	0