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Commit de18e014 authored by Heiko Stuebner's avatar Heiko Stuebner
Browse files

ARM: rockchip: add sram dt nodes and documentation 



Add dt-nodes for the sram on rk3066 and rk3188 including the reserved section
needed for smp bringup.

Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
Tested-by: default avatarUlrich Prinz <ulrich.prinz@googlemail.com>
parent f6f70cf7

Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt

0 → 100644
+30 −0
Original line number Original line Diff line number Diff line 
Rockchip SRAM for smp bringup:

------------------------------



Rockchip's smp-capable SoCs use the first part of the sram for the bringup

of the cores. Once the core gets powered up it executes the code that is

residing at the very beginning of the sram.



Therefore a reserved section sub-node has to be added to the mmio-sram

declaration.



Required sub-node properties:

- compatible : should be "rockchip,rk3066-smp-sram"



The rest of the properties should follow the generic mmio-sram discription

found in ../../misc/sram.txt



Example:



	sram: sram@10080000 {

		compatible = "mmio-sram";

		reg = <0x10080000 0x10000>;

		#address-cells = <1>;

		#size-cells = <1>;

		ranges;



		smp-sram@10080000 {

			compatible = "rockchip,rk3066-smp-sram";

			reg = <0x10080000 0x50>;

		};

	};

arch/arm/boot/dts/rk3066a.dtsi

+13 −0
Original line number Original line Diff line number Diff line
@@ -64,6 +64,19 @@ 
			clock-names = "timer", "pclk";

			clock-names = "timer", "pclk";

		};

		};





		sram: sram@10080000 {

			compatible = "mmio-sram";

			reg = <0x10080000 0x10000>;

			#address-cells = <1>;

			#size-cells = <1>;

			ranges = <0 0x10080000 0x10000>;



			smp-sram@0 {

				compatible = "rockchip,rk3066-smp-sram";

				reg = <0x0 0x50>;

			};

		};



		pinctrl@20008000 {

		pinctrl@20008000 {

			compatible = "rockchip,rk3066a-pinctrl";

			compatible = "rockchip,rk3066a-pinctrl";

			reg = <0x20008000 0x150>;

			reg = <0x20008000 0x150>;

arch/arm/boot/dts/rk3188.dtsi

+13 −0
Original line number Original line Diff line number Diff line
@@ -60,6 +60,19 @@ 
			interrupts = <GIC_PPI 13 0xf04>;

			interrupts = <GIC_PPI 13 0xf04>;

		};

		};





		sram: sram@10080000 {

			compatible = "mmio-sram";

			reg = <0x10080000 0x8000>;

			#address-cells = <1>;

			#size-cells = <1>;

			ranges = <0 0x10080000 0x8000>;



			smp-sram@0 {

				compatible = "rockchip,rk3066-smp-sram";

				reg = <0x0 0x50>;

			};

		};



		pinctrl@20008000 {

		pinctrl@20008000 {

			compatible = "rockchip,rk3188-pinctrl";

			compatible = "rockchip,rk3188-pinctrl";

			reg = <0x20008000 0xa0>,

			reg = <0x20008000 0xa0>,