ARM: rockchip: add power-management-unit

The pmu is needed to bring up the cores during smp operations and later
also other system parts. Therefore add a node and documentation for it.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Ulrich Prinz <ulrich.prinz@googlemail.com>

2 files changed, 21 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/arm/rockchip/pmu.txt b/Documentation/devicetree/bindings/arm/rockchip/pmu.txt
new file mode 100644
index 000000000000..3ee9b428b2f7
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/rockchip/pmu.txt
@@ -0,0 +1,16 @@
+Rockchip power-management-unit:
+-------------------------------
+
+The pmu is used to turn off and on different power domains of the SoCs
+This includes the power to the CPU cores.
+
+Required node properties:
+- compatible value : = "rockchip,rk3066-pmu";
+- reg : physical base address and the size of the registers window
+
+Example:
+
+        pmu@20004000 {
+                compatible = "rockchip,rk3066-pmu";
+                reg = <0x20004000 0x100>;
+        };
diff --git a/arch/arm/boot/dts/rk3xxx.dtsi b/arch/arm/boot/dts/rk3xxx.dtsi
index 0a3d5b131eba..26e5a968d49d 100644
--- a/arch/arm/boot/dts/rk3xxx.dtsi
+++ b/arch/arm/boot/dts/rk3xxx.dtsi
@@ -31,6 +31,11 @@
                         reg = <0x1013c000 0x100>;
                 };
 
+                pmu@20004000 {
+                        compatible = "rockchip,rk3066-pmu";
+                        reg = <0x20004000 0x100>;
+                };
+
                 gic: interrupt-controller@1013d000 {
                         compatible = "arm,cortex-a9-gic";
                         interrupt-controller;