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ARM: rockchip: add sram dt nodes and documentation

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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 <ulrich.prinz@googlemail.com>
This commit is contained in:
Heiko Stuebner 2013-06-17 22:08:31 +02:00
parent f6f70cf707
commit de18e01478
3 changed files with 56 additions and 0 deletions
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30
Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt Normal file
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@ -0,0 +1,30 @@
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>;
};
};

13
arch/arm/boot/dts/rk3066a.dtsi
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@ -64,6 +64,19 @@
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 {
compatible = "rockchip,rk3066a-pinctrl";
reg = <0x20008000 0x150>;

13
arch/arm/boot/dts/rk3188.dtsi
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@ -60,6 +60,19 @@
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 {
compatible = "rockchip,rk3188-pinctrl";
reg = <0x20008000 0xa0>,