[PATCH v7 5/7] ARM: rockchip: add sram dt nodes and documentation
From: heiko@sntech.de (Heiko Stübner)
Date: 2014-01-20 15:45:33
Also in:
linux-devicetree, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Add dt-nodes for the sram on rk3066 and rk3188 including the reserved section needed for smp bringup. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Ulrich Prinz <redacted> --- .../devicetree/bindings/arm/rockchip/smp-sram.txt | 23 ++++++++++++++++++++ arch/arm/boot/dts/rk3066a.dtsi | 6 +++++ arch/arm/boot/dts/rk3188.dtsi | 6 +++++ 3 files changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt
diff --git a/Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt b/Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt
new file mode 100644
index 0000000..80c878e
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt@@ -0,0 +1,23 @@ +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 has to be added to the mmio-sram declaration. + +Required node properties: +- compatible : should contain both "rockchip,rk3066-sram", "mmio-sram" + so that the smp code can select the correct sram node. + +The rest of the properties should follow the generic mmio-sram discription +found in ../../misc/sram.txt + +Example: + + sram: sram at 10080000 { + compatible = "rockchip,rk3066-sram", "mmio-sram"; + reg = <0x10080000 0x10000>; + mmio-sram-reserved = <0x0 0x50>; + };
diff --git a/arch/arm/boot/dts/rk3066a.dtsi b/arch/arm/boot/dts/rk3066a.dtsi
index be5d2b0..0dfb680 100644
--- a/arch/arm/boot/dts/rk3066a.dtsi
+++ b/arch/arm/boot/dts/rk3066a.dtsi@@ -64,6 +64,12 @@ clock-names = "timer", "pclk"; }; + sram: sram at 10080000 { + compatible = "rockchip,rk3066-sram", "mmio-sram"; + reg = <0x10080000 0x10000>; + mmio-sram-reserved = <0x0 0x50>; + }; + pinctrl at 20008000 { compatible = "rockchip,rk3066a-pinctrl"; reg = <0x20008000 0x150>;
diff --git a/arch/arm/boot/dts/rk3188.dtsi b/arch/arm/boot/dts/rk3188.dtsi
index 1a26b03..1fc7eda 100644
--- a/arch/arm/boot/dts/rk3188.dtsi
+++ b/arch/arm/boot/dts/rk3188.dtsi@@ -60,6 +60,12 @@ interrupts = <GIC_PPI 13 0xf04>; }; + sram: sram at 10080000 { + compatible = "rockchip,rk3066-sram", "mmio-sram"; + reg = <0x10080000 0x8000>; + mmio-sram-reserved = <0x0 0x50>; + }; + pinctrl at 20008000 { compatible = "rockchip,rk3188-pinctrl"; reg = <0x20008000 0xa0>,
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1.7.10.4