ARM: EXYNOS: Enable conversion of GIC dt irq specifier to linux virq

Enable conversion of device tree interrupt specifier to linux
virq domain for GIC controller.

Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 16 insertions, 1 deletions

diff --git a/arch/arm/mach-exynos/cpu.c b/arch/arm/mach-exynos/cpu.c
index 90ec247f3b37..0eb7b6a6903d 100644
--- a/arch/arm/mach-exynos/cpu.c
+++ b/arch/arm/mach-exynos/cpu.c
@@ -10,6 +10,8 @@
 
 #include <linux/sched.h>
 #include <linux/sysdev.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
 
 #include <asm/mach/map.h>
 #include <asm/mach/irq.h>
@@ -218,13 +220,26 @@ static void exynos4_gic_irq_fix_base(struct irq_data *d)
                             (gic_bank_offset * smp_processor_id());
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id exynos4_dt_irq_match[] = {
+        { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
+        {},
+};
+#endif
+
 void __init exynos4_init_irq(void)
 {
         int irq;
 
         gic_bank_offset = soc_is_exynos4412() ? 0x4000 : 0x8000;
 
-        gic_init(0, IRQ_PPI(0), S5P_VA_GIC_DIST, S5P_VA_GIC_CPU);
+        if (!of_have_populated_dt())
+                gic_init(0, IRQ_PPI(0), S5P_VA_GIC_DIST, S5P_VA_GIC_CPU);
+#ifdef CONFIG_OF
+        else
+                of_irq_init(exynos4_dt_irq_match);
+#endif
+
         gic_arch_extn.irq_eoi = exynos4_gic_irq_fix_base;
         gic_arch_extn.irq_unmask = exynos4_gic_irq_fix_base;
         gic_arch_extn.irq_mask = exynos4_gic_irq_fix_base;