Subject: Re: [PATCH 6/6] arm64: dts: meson-t7-a311d2-khadas-vim4: add initial device-tree

From: Yixun Lan <[email-masked]>
Date: Fri, 16 Jun 2023 08:01:18 +0800

Hi Lucas:

On 19:29 Thu 15 Jun     , Lucas Tanure wrote:
> The Khadas VIM4 uses the Amlogic A311D2 SoC, based on the Amlogic T7 SoC
> family, on a board with the same form factor as the VIM3 models.
I'd like to see little bit more verbose messages here, like
which functionality/driver added here - cpu, gic, timer, uart?

so, it's capable of booting into a serial console?

> 
> - 8GB LPDDR4X 2016MHz
> - 32GB eMMC 5.1 storage
> - 32MB SPI flash
> - 10/100/1000 Base-T Ethernet
> - AP6275S Wireless (802.11 a/b/g/n/ac/ax, BT5.1)
> - HDMI 2.1 video
> - HDMI Input
> - 1x USB 2.0 + 1x USB 3.0 ports
> - 1x USB-C (power) with USB 2.0 OTG
> - 3x LED's (1x red, 1x blue, 1x white)
> - 3x buttons (power, function, reset)
> - M2 socket with PCIe, USB, ADC & I2C
> - 40pin GPIO Header
> - 1x micro SD card slot
> 
> Signed-off-by: Lucas Tanure <[email-masked]>
> ---
>  arch/arm64/boot/dts/amlogic/Makefile          |   1 +
>  .../amlogic/meson-t7-a311d2-khadas-vim4.dts   | 112 ++++++++++
>  arch/arm64/boot/dts/amlogic/meson-t7.dtsi     | 202 ++++++++++++++++++
>  3 files changed, 315 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/amlogic/meson-t7-a311d2-khadas-vim4.dts
>  create mode 100644 arch/arm64/boot/dts/amlogic/meson-t7.dtsi
> 
> diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
> index cd1c5b04890a..1c5846bd1ca0 100644
> --- a/arch/arm64/boot/dts/amlogic/Makefile
> +++ b/arch/arm64/boot/dts/amlogic/Makefile
> @@ -74,3 +74,4 @@ dtb-$(CONFIG_ARCH_MESON) += meson-sm1-odroid-hc4.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-sm1-sei610.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-sm1-x96-air-gbit.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-sm1-x96-air.dtb
> +dtb-$(CONFIG_ARCH_MESON) += meson-t7-a311d2-khadas-vim4.dtb
> diff --git a/arch/arm64/boot/dts/amlogic/meson-t7-a311d2-khadas-vim4.dts b/arch/arm64/boot/dts/amlogic/meson-t7-a311d2-khadas-vim4.dts
> new file mode 100644
> index 000000000000..46e175536edf
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/meson-t7-a311d2-khadas-vim4.dts
> @@ -0,0 +1,112 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2022 Wesion, Inc. All rights reserved.
> + */
> +
> +/dts-v1/;
> +
> +#include "meson-t7.dtsi"
> +
> +/ {
> +	model = "Khadas VIM4";
> +
> +	aliases {
> +		serial0 = &uart_A;
> +	};
> +
> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		/* 3 MiB reserved for ARM Trusted Firmware (BL31) */
> +		secmon_reserved: secmon@5000000 {
> +			reg = <0x0 0x05000000 0x0 0x300000>;
> +			no-map;
> +		};
> +
> +		/* 32 MiB reserved for ARM Trusted Firmware (BL32) */
> +		secmon_reserved_bl32: secmon@5300000 {
> +			reg = <0x0 0x05300000 0x0 0x2000000>;
> +			no-map;
> +		};
> +	};
> +
> +	xtal: xtal-clk {
> +		compatible = "fixed-clock";
> +		clock-frequency = <24000000>;
> +		clock-output-names = "xtal";
> +		#clock-cells = <0>;
> +	};
> +
> +	vddcpu_a: regulator-vddcpu-a {
> +		/*
> +		 * MP8756GD Regulator.
> +		 */
> +		compatible = "pwm-regulator";
> +
> +		regulator-name = "VDDCPU_A";
> +		regulator-min-microvolt = <689000>;
> +		regulator-max-microvolt = <1049000>;
> +
> +		regulator-boot-on;
> +		regulator-always-on;
> +	};
> +
> +	vddcpu_b: regulator-vddcpu-a {
> +		/*
> +		 * MP8756GD Regulator.
> +		 */
> +		compatible = "pwm-regulator";
> +
> +		regulator-name = "VDDCPU_B";
> +		regulator-min-microvolt = <689000>;
> +		regulator-max-microvolt = <1049000>;
> +
> +		regulator-boot-on;
> +		regulator-always-on;
> +	};
> +};
> +
> +&clkc{
> +	clocks = <&xtal>;
> +	clock-names = "xtal";
> +	status = "okay";
> +};
> +
> +&uart_A {
> +	status = "okay";
> +};
> +
> +&cpu0 {
> +	cpu-supply = <&vddcpu_a>;
> +};
> +
> +&cpu1 {
> +	cpu-supply = <&vddcpu_a>;
> +};
> +
> +&cpu2 {
> +	cpu-supply = <&vddcpu_a>;
> +};
> +
> +&cpu3 {
> +	cpu-supply = <&vddcpu_a>;
> +};
> +
> +&cpu100 {
> +	cpu-supply = <&vddcpu_b>;
> +};
> +
> +&cpu101 {
> +	cpu-supply = <&vddcpu_b>;
> +};
> +
> +&cpu102 {
> +	cpu-supply = <&vddcpu_b>;
> +};
> +
> +&cpu103 {
> +	cpu-supply = <&vddcpu_b>;
> +};
> +
> diff --git a/arch/arm64/boot/dts/amlogic/meson-t7.dtsi b/arch/arm64/boot/dts/amlogic/meson-t7.dtsi
> new file mode 100644
> index 000000000000..453b3d9cb9d8
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/meson-t7.dtsi
> @@ -0,0 +1,202 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2019 Amlogic, Inc. All rights reserved.
> + */
> +
> +#include <dt-bindings/clock/mesont7-clkc.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +/ {
> +	compatible = "amlogic,t7";
> +	interrupt-parent = <&gic>;
> +	#address-cells = <2>;
> +	#size-cells = <2>;
> +
> +	cpus {
> +		#address-cells = <0x2>;
> +		#size-cells = <0x0>;
> +
> +		cpu-map {
> +			cluster0 {
> +				core0 {
> +					cpu = <&cpu100>;
> +				};
> +				core1 {
> +					cpu = <&cpu101>;
> +				};
> +				core2 {
> +					cpu = <&cpu102>;
> +				};
> +				core3 {
> +					cpu = <&cpu103>;
> +				};
> +			};
> +
> +			cluster1 {
> +				core0 {
> +					cpu = <&cpu0>;
> +				};
> +				core1 {
> +					cpu = <&cpu1>;
> +				};
> +				core2 {
> +					cpu = <&cpu2>;
> +				};
> +				core3 {
> +					cpu = <&cpu3>;
> +				};
> +			};
> +		};
> +
> +		cpu100: cpu@100 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a53";
> +			reg = <0x0 0x100>;
> +			enable-method = "psci";
> +			capacity-dmips-mhz = <632>;
> +			dynamic-power-coefficient = <110>;
> +			#cooling-cells = <2>;
> +		};
> +
> +		cpu101: cpu@101{
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a53";
> +			reg = <0x0 0x101>;
> +			enable-method = "psci";
> +			capacity-dmips-mhz = <632>;
> +			dynamic-power-coefficient = <110>;
> +			#cooling-cells = <2>;
> +		};
> +
> +		cpu102: cpu@102 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a53";
> +			reg = <0x0 0x102>;
> +			enable-method = "psci";
> +			capacity-dmips-mhz = <632>;
> +			dynamic-power-coefficient = <110>;
> +			#cooling-cells = <2>;
> +		};
> +
> +		cpu103: cpu@103 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a53";
> +			reg = <0x0 0x103>;
> +			enable-method = "psci";
> +			capacity-dmips-mhz = <632>;
> +			dynamic-power-coefficient = <110>;
> +			#cooling-cells = <2>;
> +		};
> +
> +		cpu0: cpu@0 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a73";
> +			reg = <0x0 0x0>;
> +			enable-method = "psci";
> +			capacity-dmips-mhz = <1024>;
> +			dynamic-power-coefficient = <550>;
> +			#cooling-cells = <2>;
> +		};
> +
> +		cpu1: cpu@1 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a73";
> +			reg = <0x0 0x1>;
> +			enable-method = "psci";
> +			capacity-dmips-mhz = <1024>;
> +			dynamic-power-coefficient = <550>;
> +			#cooling-cells = <2>;
> +		};
> +
> +		cpu2: cpu@2 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a73";
> +			reg = <0x0 0x2>;
> +			enable-method = "psci";
> +			capacity-dmips-mhz = <1024>;
> +			dynamic-power-coefficient = <550>;
> +			#cooling-cells = <2>;
> +		};
> +
> +		cpu3: cpu@3 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a73";
> +			reg = <0x0 0x3>;
> +			enable-method = "psci";
> +			capacity-dmips-mhz = <1024>;
> +			dynamic-power-coefficient = <550>;
> +			#cooling-cells = <2>;
> +		};
> +	};
> +
> +	timer {
> +		compatible = "arm,armv8-timer";
> +		interrupts = <GIC_PPI 13 0xff08>,
> +			     <GIC_PPI 14 0xff08>,
> +			     <GIC_PPI 11 0xff08>,
> +			     <GIC_PPI 10 0xff08>;
> +	};
> +
> +	gic: interrupt-controller@fff01000 {
> +		compatible = "arm,cortex-a15-gic", "arm,cortex-a9-gic";
> +		#interrupt-cells = <3>;
> +		#address-cells = <0>;
> +		interrupt-controller;
> +		reg = <0x0 0xfff01000 0 0x1000>,
> +		      <0x0 0xfff02000 0 0x0100>;
> +		interrupts = <GIC_PPI 9 0xf04>;
> +	};
> +
> +	psci {
> +		compatible = "arm,psci-0.2";
can you double check if it is actual version 0.2?
most recent Amlogic SoC should support psci-1.0

> +		method = "smc";
> +	};
> +
> +	sm: secure-monitor {
> +		compatible = "amlogic,meson-gxbb-sm";
> +	};
> +
> +	soc {
> +		compatible = "simple-bus";
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		apb4: apb4@fe000000 {
> +			compatible = "simple-bus";
> +			reg = <0x0 0xfe000000 0x0 0x480000>;
> +			#address-cells = <2>;
> +			#size-cells = <2>;
> +			ranges = <0x0 0x0 0x0 0xfe000000 0x0 0x480000>;
> +
> +			clkc: clock-controller {
> +				compatible = "amlogic,t7-clkc";
> +				#clock-cells = <1>;
> +				reg = <0x0 0x0 0x0 0x49c>,
> +				      <0x0 0x8000 0x0 0x320>,
> +				      <0x0 0xe040 0x0 0xbc>;
> +				reg-names = "basic",
> +					    "pll",
> +					    "cpu_clk";
> +			};
> +
> +			ao-secure@140 {
> +				compatible = "amlogic,meson-gx-ao-secure", "syscon";
> +				reg=<0x0 0x10220 0x0 0x140>;
> +				amlogic,has-chip-id;
> +			};
> +		};
> +
> +		uart_A: serial@fe078000 {
> +			compatible = "amlogic,meson-t7-uart";
> +			reg = <0x0 0xfe078000 0x0 0x18>;
> +			interrupts = <0 168 1>;
> +			status = "disabled";
> +			clocks = <&xtal>, <&clkc CLKID_UART_A>, <&xtal>;
> +			clock-names = "xtal", "pclk", "baud";
> +			fifo-size = < 64 >;
> +			pinctrl-names = "default";
> +		};
I believe there are more uart ports, it's worth the effort to add them all in one run,
which sounds more consistent to me, anyway you could also choose to add them
in later patch series, no problem..

> +	};
> +};
> +
> --
> 2.41.0
> 
> 
> _______________________________________________
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> [email-masked]
> http://lists.infradead.org/mailman/listinfo/linux-amlogic

-- 
Yixun Lan (dlan)
Gentoo Linux Developer
GPG Key ID AABEFD55

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