1 files changed, 35 insertions, 1 deletions

diff --git a/arch/arm/mach-omap2/omap-wakeupgen.c b/arch/arm/mach-omap2/omap-wakeupgen.c
index fc5fb776a710..17558be4bf0a 100644
--- a/arch/arm/mach-omap2/omap-wakeupgen.c
+++ b/arch/arm/mach-omap2/omap-wakeupgen.c
@@ -50,6 +50,9 @@
 #define OMAP4_NR_BANKS          4
 #define OMAP4_NR_IRQS           128
 
+#define SYS_NIRQ1_EXT_SYS_IRQ_1 7
+#define SYS_NIRQ2_EXT_SYS_IRQ_2 119
+
 static void __iomem *wakeupgen_base;
 static void __iomem *sar_base;
 static DEFINE_RAW_SPINLOCK(wakeupgen_lock);
@@ -153,6 +156,37 @@ static void wakeupgen_unmask(struct irq_data *d)
         irq_chip_unmask_parent(d);
 }
 
+/*
+ * The sys_nirq pins bypass peripheral modules and are wired directly
+ * to MPUSS wakeupgen. They get automatically inverted for GIC.
+ */
+static int wakeupgen_irq_set_type(struct irq_data *d, unsigned int type)
+{
+        bool inverted = false;
+
+        switch (type) {
+        case IRQ_TYPE_LEVEL_LOW:
+                type &= ~IRQ_TYPE_LEVEL_MASK;
+                type |= IRQ_TYPE_LEVEL_HIGH;
+                inverted = true;
+                break;
+        case IRQ_TYPE_EDGE_FALLING:
+                type &= ~IRQ_TYPE_EDGE_BOTH;
+                type |= IRQ_TYPE_EDGE_RISING;
+                inverted = true;
+                break;
+        default:
+                break;
+        }
+
+        if (inverted && d->hwirq != SYS_NIRQ1_EXT_SYS_IRQ_1 &&
+            d->hwirq != SYS_NIRQ2_EXT_SYS_IRQ_2)
+                pr_warn("wakeupgen: irq%li polarity inverted in dts\n",
+                        d->hwirq);
+
+        return irq_chip_set_type_parent(d, type);
+}
+
 #ifdef CONFIG_HOTPLUG_CPU
 static DEFINE_PER_CPU(u32 [MAX_NR_REG_BANKS], irqmasks);
 
@@ -446,7 +480,7 @@ static struct irq_chip wakeupgen_chip = {
         .irq_mask               = wakeupgen_mask,
         .irq_unmask             = wakeupgen_unmask,
         .irq_retrigger          = irq_chip_retrigger_hierarchy,
-        .irq_set_type           = irq_chip_set_type_parent,
+        .irq_set_type           = wakeupgen_irq_set_type,
         .flags                  = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND,
 #ifdef CONFIG_SMP
         .irq_set_affinity       = irq_chip_set_affinity_parent,