The Rockchip SoCs need a special part of their sram for bringup of additional cores. Therefore also limit the public area when adding the mmio-sram node to keep the sram driver from using this space.
Signed-off-by: Heiko Stuebner <[email protected]> Tested-by: Ulrich Prinz <[email protected]> --- .../devicetree/bindings/arm/rockchip/smp-sram.txt | 24 ++++++++++++++++++++ arch/arm/boot/dts/rk3066a.dtsi | 6 +++++ arch/arm/boot/dts/rk3188.dtsi | 6 +++++ 3 files changed, 36 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..0c88d06 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt @@ -0,0 +1,24 @@ +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 the available space has to be limited to exclude this area using +the available property of the sram node. + +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@10080000 { + compatible = "rockchip,rk3066-sram", "mmio-sram"; + reg = <0x10080000 0x10000>; + available = <0x50 0xffb0>; + }; diff --git a/arch/arm/boot/dts/rk3066a.dtsi b/arch/arm/boot/dts/rk3066a.dtsi index 2218c64..e91048b 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@10080000 { + compatible = "rockchip,rk3066-sram", "mmio-sram"; + reg = <0x10080000 0x10000>; + available = <0x50 0xffb0>; + }; + pinctrl@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..a9885df 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@10080000 { + compatible = "rockchip,rk3066-sram", "mmio-sram"; + reg = <0x10080000 0x8000>; + available = <0x50 0x7fb0>; + }; + pinctrl@20008000 { compatible = "rockchip,rk3188-pinctrl"; reg = <0x20008000 0xa0>, -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
