irqchip: Move Exynos PM to use stacked domains

index 277b48b..554e9be 100644
@@ -130,6 +130,9 @@
 		pmu_system_controller: system-controller at 10020000 {
 			compatible = "samsung,exynos3250-pmu", "syscon";
 			reg = <0x10020000 0x4000>;
+			interrupt-controller;
+			#interrupt-cells = <3>;
+			interrupt-parent = <&gic>;
 		};
 
 		mipi_phy: video-phy at 10020710 {

@@ -183,7 +186,8 @@
 		rtc: rtc at 10070000 {
 			compatible = "samsung,exynos3250-rtc";
 			reg = <0x10070000 0x100>;
-			interrupts = <0 73 0>, <0 74 0>;
+			interrupts = <0 41 0>, <0 42 0>;
+			interrupt-parent = <&pmu_system_controller>;
 			status = "disabled";
 		};
 

index 76173ca..1d21f02 100644
@@ -152,6 +152,9 @@
 	pmu_system_controller: system-controller at 10020000 {
 		compatible = "samsung,exynos4210-pmu", "syscon";
 		reg = <0x10020000 0x4000>;
+		interrupt-controller;
+		#interrupt-cells = <3>;
+		interrupt-parent = <&gic>;
 	};
 
 	dsi_0: dsi at 11C80000 {

@@ -264,6 +267,7 @@
 	rtc at 10070000 {
 		compatible = "samsung,s3c6410-rtc";
 		reg = <0x10070000 0x100>;
+		interrupt-parent = <&pmu_system_controller>;
 		interrupts = <0 44 0>, <0 45 0>;
 		clocks = <&clock CLK_RTC>;
 		clock-names = "rtc";

index 9bb1b0b..72fa2d1 100644
@@ -196,6 +196,9 @@
 		clock-names = "clkout16";
 		clocks = <&clock CLK_FIN_PLL>;
 		#clock-cells = <1>;
+		interrupt-controller;
+		#interrupt-cells = <3>;
+		interrupt-parent = <&gic>;
 	};
 
 	sysreg_system_controller: syscon at 10050000 {

@@ -232,6 +235,7 @@
 	rtc: rtc at 101E0000 {
 		clocks = <&clock CLK_RTC>;
 		clock-names = "rtc";
+		interrupt-parent = <&pmu_system_controller>;
 		status = "disabled";
 	};
 

index 9dc2e97..d11a6ab 100644
@@ -327,6 +327,7 @@
 	rtc: rtc at 101E0000 {
 		clocks = <&clock CLK_RTC>;
 		clock-names = "rtc";
+		interrupt-parent = <&pmu_system_controller>;
 		status = "disabled";
 	};
 

@@ -769,6 +770,9 @@
 		clock-names = "clkout16";
 		clocks = <&clock CLK_FIN_PLL>;
 		#clock-cells = <1>;
+		interrupt-controller;
+		#interrupt-cells = <3>;
+		interrupt-parent = <&gic>;
 	};
 
 	sysreg_system_controller: syscon at 10050000 {

index 67b2113..2d6356d 100644
@@ -29,10 +29,27 @@ Properties:
  - clocks : list of phandles and specifiers to all input clocks listed in
 		clock-names property.
 
+Optional properties:
+
+Some PMUs are capable of behaving as an interrupt controller (mostly
+to wake up a suspended PMU). In which case, they can have the
+following properties:
+
+- interrupt-controller: indicate that said PMU is an interrupt controller
+
+- #interrupt-cells: must be identical to the that of the parent interrupt
+  controller.
+
+- interrupt-parent: a phandle indicating which interrupt controller
+  this PMU signals interrupts to.
+
 Example :
 pmu_system_controller: system-controller at 10040000 {
 	compatible = "samsung,exynos5250-pmu", "syscon";
 	reg = <0x10040000 0x5000>;
+	interrupt-controller;
+	#interrupt-cells = <3>;
+	interrupt-parent = <&gic>;
 	#clock-cells = <1>;
 	clock-names = "clkout0", "clkout1", "clkout2", "clkout3",
 			"clkout4", "clkout8", "clkout9";