[PATCH 1/9] ARM: Kirkwood: Add interrupt controller support for DT boards

[Andrew Lunn <andrew-g2DYL2Zd6BY@public.gmane.org>]

Signed-off-by: Andrew Lunn <andrew-g2DYL2Zd6BY@public.gmane.org>
---
 .../devicetree/bindings/arm/mrvl/intc.txt          |   20 ++++++++++++++++++
 arch/arm/boot/dts/kirkwood.dtsi                    |    9 ++++++++
 arch/arm/mach-kirkwood/board-dt.c                  |   22 +++++++++++++++++++-
 3 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/arm/mrvl/intc.txt b/Documentation/devicetree/bindings/arm/mrvl/intc.txt
index 80b9a94..612536e 100644
--- a/Documentation/devicetree/bindings/arm/mrvl/intc.txt
+++ b/Documentation/devicetree/bindings/arm/mrvl/intc.txt
@@ -38,3 +38,23 @@ Example:
 		reg-names = "mux status", "mux mask";
 		mrvl,intc-nr-irqs = <2>;
 	};
+
+* Marvell Orion Interrupt controller
+
+Required properties
+- compatible :  Should be "marvell,orion-intc"
+- #interrupt-cells: Specifies the number of cells needed to encode an
+  interrupt source. Supported value is <1>
+- interrupt-controller : So that its clear its an interrupt controller.
+Optional properties
+- reg : Not used yet, but will contain the interrupt mask address
+
+Example:
+
+	intc: interrupt-controller {
+        	compatible = "marvell,orion-intc", "marvell,intc";
+		interrupt-controller;
+		#interrupt-cells = <1>;
+                reg = <0xfed20204 0x04>,
+		      <0xfed20214 0x04>;
+        };
diff --git a/arch/arm/boot/dts/kirkwood.dtsi b/arch/arm/boot/dts/kirkwood.dtsi
index 926528b..8eab7c4 100644
--- a/arch/arm/boot/dts/kirkwood.dtsi
+++ b/arch/arm/boot/dts/kirkwood.dtsi
@@ -2,6 +2,15 @@
 
 / {
 	compatible = "mrvl,kirkwood";
+	interrupt-parent = <&intc>;
+
+	intc: interrupt-controller {
+        	compatible = "marvell,orion-intc", "marvell,intc";
+		interrupt-controller;
+		#interrupt-cells = <1>;
+                reg = <0xfed20204 0x04>,
+		      <0xfed20214 0x04>;
+        };
 
 	ocp@f1000000 {
 		compatible = "simple-bus";
diff --git a/arch/arm/mach-kirkwood/board-dt.c b/arch/arm/mach-kirkwood/board-dt.c
index edc3f8a..fa51586 100644
--- a/arch/arm/mach-kirkwood/board-dt.c
+++ b/arch/arm/mach-kirkwood/board-dt.c
@@ -14,6 +14,7 @@
 #include <linux/init.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
+#include <linux/of_irq.h>
 #include <linux/kexec.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -80,11 +81,30 @@ static const char *kirkwood_dt_board_compat[] = {
 	NULL
 };
 
+static int __init kirkwood_add_irq_domain(struct device_node *np,
+					  struct device_node *interrupt_parent)
+{
+	kirkwood_init_irq();
+	irq_domain_add_legacy(np, 64, 0, 0, &irq_domain_simple_ops, NULL);
+	return 0;
+}
+
+static const struct of_device_id kirkwood_irq_match[] = {
+	{ .compatible = "marvell,orion-intc",
+	  .data = kirkwood_add_irq_domain, },
+	{},
+};
+
+static void __init kirkwood_dt_init_irq(void)
+{
+	of_irq_init(kirkwood_irq_match);
+}
+
 DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)")
 	/* Maintainer: Jason Cooper <jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org> */
 	.map_io		= kirkwood_map_io,
 	.init_early	= kirkwood_init_early,
-	.init_irq	= kirkwood_init_irq,
+	.init_irq	= kirkwood_dt_init_irq,
 	.timer		= &kirkwood_timer,
 	.init_machine	= kirkwood_dt_init,
 	.restart	= kirkwood_restart,
-- 
1.7.10