[01/04] devicetree: bindings: Renesas APMU and SMP Enable method

Commit Message

Magnus Damm May 21, 2015, 1:21 a.m. UTC

From: Magnus Damm <[e-mail]>

Add DT binding documentation for the APMU hardware and add "renesas,apmu"
to the list of enable methods for the ARM cpus.

Signed-off-by: Magnus Damm <[e-mail]>
---

 Documentation/devicetree/bindings/arm/cpus.txt           |    1 
 Documentation/devicetree/bindings/power/renesas,apmu.txt |   31 ++++++++++++++
 2 files changed, 32 insertions(+)

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Patch

--- 0001/Documentation/devicetree/bindings/arm/cpus.txt
+++ work/Documentation/devicetree/bindings/arm/cpus.txt	2015-05-20 21:55:51.912366518 +0900
@@ -197,6 +197,7 @@  nodes to be present and contain the prop
 			    "qcom,gcc-msm8660"
 			    "qcom,kpss-acc-v1"
 			    "qcom,kpss-acc-v2"
+			    "renesas,apmu"
 			    "rockchip,rk3066-smp"
 
 	- cpu-release-addr
--- /dev/null
+++ work/Documentation/devicetree/bindings/power/renesas,apmu.txt	2015-05-20 22:39:34.872366518 +0900
@@ -0,0 +1,31 @@ 
+DT bindings for the Renesas Advanced Power Management Unit
+
+Renesas R-Car line of SoCs utilize one or more APMU hardware units
+for CPU core power domain control including SMP boot and CPU Hotplug.
+
+Required properties:
+
+- compatible: Should be "renesas,apmu-<soctype>", "renesas,apmu" as fallback.
+	      Examples with soctypes are:
+		- "renesas,apmu-r8a7790" (R-Car H2)
+		- "renesas,apmu-r8a7791" (R-Car M2-W)
+		- "renesas,apmu-r8a7792" (R-Car V2H)
+		- "renesas,apmu-r8a7793" (R-Car M2-N)
+		- "renesas,apmu-r8a7794" (R-Car E2)
+
+- reg: Base address and length of the I/O registers used by the APMU.
+
+- cpus: This node contains a list of CPU cores, which should match the order
+  of CPU cores used by the WUPCR and PSTR registers in the Advanced Power
+  Management Until section of the device's datasheet.
+
+
+Example:
+
+This shows the r8a7791 APMU that can control CPU0 and CPU1.
+
+	apmu@e6152000 {
+		compatible = "renesas,apmu-r8a7791", "renesas,apmu";
+		reg = <0 0xe6152000 0 0x188>;
+		cpus = <&cpu0 &cpu1>;
+	};