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authorMagnus Damm <damm+renesas@opensource.se>2016-06-28 16:10:30 +0200
committerSimon Horman <horms+renesas@verge.net.au>2016-06-29 14:26:39 +0200
commite454b359b7a0a6f59e3d83394e6d4e598554cb33 (patch)
treee52b279ee238ee25baf23ab9c0555547e619ad4a /Documentation
parentARM: dts: kzm9g: Update console parameters (diff)
downloadlinux-dev-e454b359b7a0a6f59e3d83394e6d4e598554cb33.tar.xz
linux-dev-e454b359b7a0a6f59e3d83394e6d4e598554cb33.zip
devicetree: bindings: Renesas APMU and SMP Enable method
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 <damm+renesas@opensource.se> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Rob Herring <robh@kernel.org> Cc: devicetree@vger.kernel.org Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/arm/cpus.txt1
-rw-r--r--Documentation/devicetree/bindings/power/renesas,apmu.txt31
2 files changed, 32 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txt
index 3f0cbbb8395f..fa7520eb6387 100644
--- a/Documentation/devicetree/bindings/arm/cpus.txt
+++ b/Documentation/devicetree/bindings/arm/cpus.txt
@@ -204,6 +204,7 @@ nodes to be present and contain the properties described below.
"qcom,gcc-msm8660"
"qcom,kpss-acc-v1"
"qcom,kpss-acc-v2"
+ "renesas,apmu"
"rockchip,rk3036-smp"
"rockchip,rk3066-smp"
"ste,dbx500-smp"
diff --git a/Documentation/devicetree/bindings/power/renesas,apmu.txt b/Documentation/devicetree/bindings/power/renesas,apmu.txt
new file mode 100644
index 000000000000..84404c9edff7
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/renesas,apmu.txt
@@ -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,<soctype>-apmu", "renesas,apmu" as fallback.
+ Examples with soctypes are:
+ - "renesas,r8a7790-apmu" (R-Car H2)
+ - "renesas,r8a7791-apmu" (R-Car M2-W)
+ - "renesas,r8a7792-apmu" (R-Car V2H)
+ - "renesas,r8a7793-apmu" (R-Car M2-N)
+ - "renesas,r8a7794-apmu" (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 Unit section of the device's datasheet.
+
+
+Example:
+
+This shows the r8a7791 APMU that can control CPU0 and CPU1.
+
+ apmu@e6152000 {
+ compatible = "renesas,r8a7791-apmu", "renesas,apmu";
+ reg = <0 0xe6152000 0 0x188>;
+ cpus = <&cpu0 &cpu1>;
+ };