From d7f3ec2b69f692d215deb991d109a3341b0d8da9 Mon Sep 17 00:00:00 2001 From: Gregory CLEMENT Date: Wed, 9 Jul 2014 15:40:14 +0200 Subject: [PATCH] ARM: mvebu: add CA9 MPcore SoC Controller node The CA9 MPcore SoC Control block is a set of registers that allows to configure certain internal aspects of the core blocks of the SoC (Cortex-A9, L2 cache controller, etc.). In most cases, the default values are fine so they aren't many reasons to touch those registers, but there is one exception: to support cpuidle on Armada 38x, we need to modify the value of the CA9 MPcore Reset Control register. Therefore, this commit adds a new Device Tree binding for this hardware block, and uses this new binding for the Armada 38x Device Tree file. Signed-off-by: Gregory CLEMENT Signed-off-by: Thomas Petazzoni Cc: devicetree@vger.kernel.org Link: https://lkml.kernel.org/r/1404913221-17343-11-git-send-email-thomas.petazzoni@free-electrons.com Signed-off-by: Jason Cooper --- .../bindings/arm/armada-380-mpcore-soc-ctrl.txt | 14 ++++++++++++++ arch/arm/boot/dts/armada-38x.dtsi | 5 +++++ 2 files changed, 19 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/armada-380-mpcore-soc-ctrl.txt diff --git a/Documentation/devicetree/bindings/arm/armada-380-mpcore-soc-ctrl.txt b/Documentation/devicetree/bindings/arm/armada-380-mpcore-soc-ctrl.txt new file mode 100644 index 000000000000..8781073029e9 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/armada-380-mpcore-soc-ctrl.txt @@ -0,0 +1,14 @@ +Marvell Armada 38x CA9 MPcore SoC Controller +============================================ + +Required properties: + +- compatible: Should be "marvell,armada-380-mpcore-soc-ctrl". + +- reg: should be the register base and length as documented in the + datasheet for the CA9 MPcore SoC Control registers + +mpcore-soc-ctrl@20d20 { + compatible = "marvell,armada-380-mpcore-soc-ctrl"; + reg = <0x20d20 0x6c>; +}; diff --git a/arch/arm/boot/dts/armada-38x.dtsi b/arch/arm/boot/dts/armada-38x.dtsi index 3de364e81b52..b479eaa23fcc 100644 --- a/arch/arm/boot/dts/armada-38x.dtsi +++ b/arch/arm/boot/dts/armada-38x.dtsi @@ -286,6 +286,11 @@ reg = <0x20800 0x10>; }; + mpcore-soc-ctrl@20d20 { + compatible = "marvell,armada-380-mpcore-soc-ctrl"; + reg = <0x20d20 0x6c>; + }; + coherency-fabric@21010 { compatible = "marvell,armada-380-coherency-fabric"; reg = <0x21010 0x1c>; -- 2.39.5