[ARM] Allow SA1100 RTC alarm to be configured for wakeup

[linux-2.6-omap-h63xx.git] / arch / arm / mach-sa1100 / irq.c

diff --git a/arch/arm/mach-sa1100/irq.c b/arch/arm/mach-sa1100/irq.c
index c131a5201b5ba885ba9448381cfaab27ab345634..b3a56024182ee6ac15cc3e679e815661ee7095f4 100644 (file)
--- a/arch/arm/mach-sa1100/irq.c
+++ b/arch/arm/mach-sa1100/irq.c
@@ -199,10 +199,26 @@ static void sa1100_unmask_irq(unsigned int irq)
        ICMR |= (1 << irq);
 }
 
+/*
+ * Apart form GPIOs, only the RTC alarm can be a wakeup event.
+ */
+static int sa1100_set_wake(unsigned int irq, unsigned int on)
+{
+       if (irq == IRQ_RTCAlrm) {
+               if (on)
+                       PWER |= PWER_RTC;
+               else
+                       PWER &= ~PWER_RTC;
+               return 0;
+       }
+       return -EINVAL;
+}
+
 static struct irqchip sa1100_normal_chip = {
        .ack            = sa1100_mask_irq,
        .mask           = sa1100_mask_irq,
        .unmask         = sa1100_unmask_irq,
+       .set_wake       = sa1100_set_wake,
 };
 
 static struct resource irq_resource = {