Re: [PATCH v4 2/2] arm64: dts: Add Mediatek SoC MT2712 and evaluation board dts and Makefile

[Matthias Brugger]

On 06/22/2017 11:32 AM, YT Shen wrote:
> This adds basic chip support for Mediatek 2712
>
> Signed-off-by: YT Shen <yt.shen@xxxxxxxxxxxx>
> ---
>   arch/arm64/boot/dts/mediatek/Makefile       |   1 +
>   arch/arm64/boot/dts/mediatek/mt2712-evb.dts |  32 ++++++
>   arch/arm64/boot/dts/mediatek/mt2712e.dtsi   | 172 ++++++++++++++++++++++++++++
>   3 files changed, 205 insertions(+)
>   create mode 100644 arch/arm64/boot/dts/mediatek/mt2712-evb.dts
>   create mode 100644 arch/arm64/boot/dts/mediatek/mt2712e.dtsi
>
> diff --git a/arch/arm64/boot/dts/mediatek/Makefile b/arch/arm64/boot/dts/mediatek/Makefile
> index 9fbfd32..fcc0604 100644
> --- a/arch/arm64/boot/dts/mediatek/Makefile
> +++ b/arch/arm64/boot/dts/mediatek/Makefile
> @@ -1,3 +1,4 @@
> +dtb-$(CONFIG_ARCH_MEDIATEK) += mt2712-evb.dtb
>   dtb-$(CONFIG_ARCH_MEDIATEK) += mt6755-evb.dtb
>   dtb-$(CONFIG_ARCH_MEDIATEK) += mt6795-evb.dtb
>   dtb-$(CONFIG_ARCH_MEDIATEK) += mt8173-evb.dtb
> diff --git a/arch/arm64/boot/dts/mediatek/mt2712-evb.dts b/arch/arm64/boot/dts/mediatek/mt2712-evb.dts
> new file mode 100644
> index 0000000..8c804df
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt2712-evb.dts
> @@ -0,0 +1,32 @@
> +/*
> + * Copyright (c) 2017 MediaTek Inc.
> + * Author: YT Shen <yt.shen@xxxxxxxxxxxx>
> + *
> + * SPDX-License-Identifier: (GPL-2.0 OR MIT)
> + */
> +
> +/dts-v1/;
> +#include "mt2712e.dtsi"
> +
> +/ {
> +	model = "MediaTek MT2712 evaluation board";
> +	compatible = "mediatek,mt2712-evb", "mediatek,mt2712";
> +
> +	aliases {
> +		serial0 = &uart0;
> +	};
> +
> +	memory@40000000 {
> +		device_type = "memory";
> +		reg = <0 0x40000000 0 0x80000000>;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:921600n8";
> +	};
> +};
> +
> +&uart0 {
> +	status = "okay";
> +};
> +
> diff --git a/arch/arm64/boot/dts/mediatek/mt2712e.dtsi b/arch/arm64/boot/dts/mediatek/mt2712e.dtsi
> new file mode 100644
> index 0000000..461ee0f
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt2712e.dtsi
> @@ -0,0 +1,172 @@
> +/*
> + * Copyright (c) 2017 MediaTek Inc.
> + * Author: YT Shen <yt.shen@xxxxxxxxxxxx>
> + *
> + * SPDX-License-Identifier: (GPL-2.0 OR MIT)
> + */
> +
> +#include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +/ {
> +	compatible = "mediatek,mt2712";
> +	interrupt-parent = <&sysirq>;
> +	#address-cells = <2>;
> +	#size-cells = <2>;
> +
> +	cpus {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		cpu-map {
> +			cluster0 {
> +				core0 {
> +					cpu = <&cpu0>;
> +				};
> +				core1 {
> +					cpu = <&cpu1>;
> +				};
> +			};
> +
> +			cluster1 {
> +				core0 {
> +					cpu = <&cpu2>;
> +				};
> +			};
> +		};
> +
> +		cpu0: cpu@0 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a35";
> +			reg = <0x000>;
> +		};
> +
> +		cpu1: cpu@1 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a35";
> +			reg = <0x001>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu2: cpu@200 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72";
> +			reg = <0x200>;
> +			enable-method = "psci";
> +		};
> +	};
> +
> +	psci {
> +		compatible = "arm,psci-0.2";
> +		method = "smc";
> +	};
> +
> +	uart_clk: dummy26m {
> +		compatible = "fixed-clock";
> +		clock-frequency = <26000000>;
> +		#clock-cells = <0>;
> +	};
> +
> +	timer {
> +		compatible = "arm,armv8-timer";
> +		interrupt-parent = <&gic>;
> +		interrupts = <GIC_PPI 13
> +			      (GIC_CPU_MASK_RAW(0x13) | IRQ_TYPE_LEVEL_LOW)>,
> +			     <GIC_PPI 14
> +			      (GIC_CPU_MASK_RAW(0x13) | IRQ_TYPE_LEVEL_LOW)>,
> +			     <GIC_PPI 11
> +			      (GIC_CPU_MASK_RAW(0x13) | IRQ_TYPE_LEVEL_LOW)>,
> +			     <GIC_PPI 10
> +			      (GIC_CPU_MASK_RAW(0x13) | IRQ_TYPE_LEVEL_LOW)>;
> +	};
> +
> +	soc {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		compatible = "simple-bus";
> +		ranges;
> +
> +		uart5: serial@1000f000 {
> +			compatible = "mediatek,mt2712-uart",
> +				     "mediatek,mt6577-uart";
> +			reg = <0 0x1000f000 0 0x400>;
> +			interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_LOW>;
> +			clocks = <&uart_clk>, <&uart_clk>;
> +			clock-names = "baud", "bus";
> +			status = "disabled";
> +		};

So baud and bus clock are both 26 MHz?

Regards,
Matthias