From: Gregory CLEMENT <[email protected]> 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 <[email protected]> Signed-off-by: Thomas Petazzoni <[email protected]> Cc: [email protected] --- .../devicetree/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 0000000..8781073 --- /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 689fa1a..242d0ec 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>; -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
