powerpc/mpic: add irq_set_wake support

Add irq_set_wake support. Just add IRQF_NO_SUSPEND to desc->action->flag.
So the wake up interrupt will not be disable in suspend_device_irqs.

Signed-off-by: Wang Dongsheng <dongsheng.wang@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 1a4e19c6a688..4635d11f2dc2 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -920,6 +920,22 @@ int mpic_set_irq_type(struct irq_data *d, unsigned int flow_type)
         return IRQ_SET_MASK_OK_NOCOPY;
 }
 
+static int mpic_irq_set_wake(struct irq_data *d, unsigned int on)
+{
+        struct irq_desc *desc = container_of(d, struct irq_desc, irq_data);
+        struct mpic *mpic = mpic_from_irq_data(d);
+
+        if (!(mpic->flags & MPIC_FSL))
+                return -ENXIO;
+
+        if (on)
+                desc->action->flags |= IRQF_NO_SUSPEND;
+        else
+                desc->action->flags &= ~IRQF_NO_SUSPEND;
+
+        return 0;
+}
+
 void mpic_set_vector(unsigned int virq, unsigned int vector)
 {
         struct mpic *mpic = mpic_from_irq(virq);
@@ -957,6 +973,7 @@ static struct irq_chip mpic_irq_chip = {
         .irq_unmask     = mpic_unmask_irq,
         .irq_eoi        = mpic_end_irq,
         .irq_set_type   = mpic_set_irq_type,
+        .irq_set_wake   = mpic_irq_set_wake,
 };
 
 #ifdef CONFIG_SMP
@@ -971,6 +988,7 @@ static struct irq_chip mpic_tm_chip = {
         .irq_mask       = mpic_mask_tm,
         .irq_unmask     = mpic_unmask_tm,
         .irq_eoi        = mpic_end_irq,
+        .irq_set_wake   = mpic_irq_set_wake,
 };
 
 #ifdef CONFIG_MPIC_U3_HT_IRQS