1 files changed, 32 insertions, 6 deletions

diff --git a/arch/arc/kernel/irq.c b/arch/arc/kernel/irq.c
index 2f399eb88f9d..3c18e66386c7 100644
--- a/arch/arc/kernel/irq.c
+++ b/arch/arc/kernel/irq.c
@@ -9,6 +9,8 @@
 
 #include <linux/interrupt.h>
 #include <linux/module.h>
+#include <linux/of.h>
+#include <linux/irqdomain.h>
 #include <asm/sections.h>
 #include <asm/irq.h>
 
@@ -59,16 +61,40 @@ static struct irq_chip onchip_intc = {
         .irq_unmask     = arc_unmask_irq,
 };
 
+static int arc_intc_domain_map(struct irq_domain *d, unsigned int irq,
+                                irq_hw_number_t hw)
+{
+        if (irq == TIMER0_IRQ)
+                irq_set_chip_and_handler(irq, &onchip_intc, handle_percpu_irq);
+        else
+                irq_set_chip_and_handler(irq, &onchip_intc, handle_level_irq);
+
+        return 0;
+}
+
+static const struct irq_domain_ops arc_intc_domain_ops = {
+        .xlate = irq_domain_xlate_onecell,
+        .map = arc_intc_domain_map,
+};
+
+static struct irq_domain *root_domain;
+
 void __init init_onchip_IRQ(void)
 {
-        int i;
+        struct device_node *intc = NULL;
+
+        intc = of_find_compatible_node(NULL, NULL, "snps,arc700-intc");
+        if(!intc)
+                panic("DeviceTree Missing incore intc\n");
+
+        root_domain = irq_domain_add_legacy(intc, NR_IRQS, 0, 0,
+                                            &arc_intc_domain_ops, NULL);
 
-        for (i = 0; i < NR_IRQS; i++)
-                irq_set_chip_and_handler(i, &onchip_intc, handle_level_irq);
+        if (!root_domain)
+                panic("root irq domain not avail\n");
 
-#ifdef CONFIG_SMP
-        irq_set_chip_and_handler(TIMER0_IRQ, &onchip_intc, handle_percpu_irq);
-#endif
+        /* with this we don't need to export root_domain */
+        irq_set_default_host(root_domain);
 }
 
 /*