davinci: cp_intc: provide set_wake function

There is nothing special to be done for interrupts
which can wakeup the device from sleep on CP-INTC,
but not having a set_wake implemented prevents use
of common drivers which expect this function to be
implemented for all wakeup interrupt sources.

This patch fixes the issue encountered when using the
omap-rtc driver on DA850. On DA850 the RTC alarm
interrupt is used to wake up the SoC from deep sleep
mode. Without this patch, the disable_irq_wake throws
an unbalanced wake disable warning while resuming
because the previous enable call fails for lack of
set_wake implementation.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/cp_intc.c b/arch/arm/mach-davinci/cp_intc.c
index 52b287cf3a42..37311d1830eb 100644
--- a/arch/arm/mach-davinci/cp_intc.c
+++ b/arch/arm/mach-davinci/cp_intc.c
@@ -81,12 +81,23 @@ static int cp_intc_set_irq_type(unsigned int irq, unsigned int flow_type)
         return 0;
 }
 
+/*
+ * Faking this allows us to to work with suspend functions of
+ * generic drivers which call {enable|disable}_irq_wake for
+ * wake up interrupt sources (eg RTC on DA850).
+ */
+static int cp_intc_set_wake(unsigned int irq, unsigned int on)
+{
+        return 0;
+}
+
 static struct irq_chip cp_intc_irq_chip = {
         .name           = "cp_intc",
         .ack            = cp_intc_ack_irq,
         .mask           = cp_intc_mask_irq,
         .unmask         = cp_intc_unmask_irq,
         .set_type       = cp_intc_set_irq_type,
+        .set_wake       = cp_intc_set_wake,
 };
 
 void __init cp_intc_init(void __iomem *base, unsigned short num_irq,