Hello Xianwei,
On Tue, Mar 12, 2024 at 05:18:59PM +0800, Xianwei Zhao via B4 Relay wrote:
> From: Xianwei Zhao <xianwei.zhao at amlogic.com>
>
> Amlogic A4 is an application processor designed for smart audio
> and IoT applications.
>
> Add basic support for the A4 based Amlogic BA400 board, which describes
> the following components: CPU, GIC, IRQ, Timer and UART.
> These are capable of booting up into the serial console.
>
> Signed-off-by: Xianwei Zhao <xianwei.zhao at amlogic.com>
> ---
> arch/arm64/boot/dts/amlogic/Makefile | 1 +
> .../boot/dts/amlogic/amlogic-a4-a113l2-ba400.dts | 43 ++++++++++
> arch/arm64/boot/dts/amlogic/amlogic-a4.dtsi | 99 ++++++++++++++++++++++
> 3 files changed, 143 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
> index 1ab160bf928a..9a50ec11bb8d 100644
> --- a/arch/arm64/boot/dts/amlogic/Makefile
> +++ b/arch/arm64/boot/dts/amlogic/Makefile
> @@ -1,4 +1,5 @@
> # SPDX-License-Identifier: GPL-2.0
> +dtb-$(CONFIG_ARCH_MESON) += amlogic-a4-a113l2-ba400.dtb
> dtb-$(CONFIG_ARCH_MESON) += amlogic-c3-c302x-aw409.dtb
> dtb-$(CONFIG_ARCH_MESON) += amlogic-t7-a311d2-an400.dtb
> dtb-$(CONFIG_ARCH_MESON) += amlogic-t7-a311d2-khadas-vim4.dtb
> diff --git a/arch/arm64/boot/dts/amlogic/amlogic-a4-a113l2-ba400.dts b/arch/arm64/boot/dts/amlogic/amlogic-a4-a113l2-ba400.dts
> new file mode 100644
> index 000000000000..60f9f23858c6
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/amlogic-a4-a113l2-ba400.dts
> @@ -0,0 +1,43 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2024 Amlogic, Inc. All rights reserved.
> + */
> +
> +/dts-v1/;
> +
> +#include "amlogic-a4.dtsi"
> +
> +/ {
> + model = "Amlogic A113L2 ba400 Development Board";
> + compatible = "amlogic,ba400","amlogic,a4";
> + interrupt-parent = <&gic>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> +
> + aliases {
> + serial0 = &uart_b;
> + };
> +
> + memory at 0 {
> + device_type = "memory";
> + reg = <0x0 0x0 0x0 0x40000000>;
> + };
> +
> + reserved-memory {
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> +
> + /* 52 MiB reserved for ARM Trusted Firmware */
> + secmon_reserved:linux,secmon {
> + compatible = "shared-dma-pool";
> + no-map;
> + alignment = <0x0 0x400000>;
> + reg = <0x0 0x05000000 0x0 0x3400000>;
> + };
> + };
> +};
> +
> +&uart_b {
> + status = "okay";
> +};
> diff --git a/arch/arm64/boot/dts/amlogic/amlogic-a4.dtsi b/arch/arm64/boot/dts/amlogic/amlogic-a4.dtsi
> new file mode 100644
> index 000000000000..7e8745010b52
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/amlogic-a4.dtsi
> @@ -0,0 +1,99 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2024 Amlogic, Inc. All rights reserved.
> + */
> +
> +#include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +#include <dt-bindings/gpio/gpio.h>
> +/ {
> + cpus {
> + #address-cells = <2>;
> + #size-cells = <0>;
> +
> + cpu0: cpu at 0 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + reg = <0x0 0x0>;
> + enable-method = "psci";
> + };
> +
> + cpu1: cpu at 1 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + reg = <0x0 0x1>;
> + enable-method = "psci";
> + };
> +
> + cpu2: cpu at 2 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + reg = <0x0 0x2>;
> + enable-method = "psci";
> + };
> +
> + cpu3: cpu at 3 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + reg = <0x0 0x3>;
> + enable-method = "psci";
> + };
> + };
> +
> + timer {
> + compatible = "arm,armv8-timer";
> + interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> + <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> + <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> + <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
> + };
> +
> + psci {
> + compatible = "arm,psci-0.2";
> + method = "smc";
> + };
> +
> + xtal: xtal-clk {
> + compatible = "fixed-clock";
> + clock-frequency = <24000000>;
> + clock-output-names = "xtal";
> + #clock-cells = <0>;
> + };
> +
> + soc {
> + compatible = "simple-bus";
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> +
> + gic: interrupt-controller at fff01000 {
> + compatible = "arm,gic-400";
> + #interrupt-cells = <3>;
> + #address-cells = <0>;
> + interrupt-controller;
> + reg = <0x0 0xfff01000 0 0x1000>,
> + <0x0 0xfff02000 0 0x2000>,
> + <0x0 0xfff04000 0 0x2000>,
> + <0x0 0xfff06000 0 0x2000>;
> + interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
> + };
> +
> + apb at fe000000 {
> + compatible = "simple-bus";
> + reg = <0x0 0xfe000000 0x0 0x480000>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges = <0x0 0x0 0x0 0xfe000000 0x0 0x480000>;
> +
> + uart_b: serial at 7a000 {
> + compatible = "amlogic,meson-s4-uart",
If I'm not wrong, you need to create dt-binding alias for meson-a4-uart
and use it as 3rd compatible string.
> + "amlogic,meson-ao-uart";
> + reg = <0x0 0x7a000 0x0 0x18>;
> + interrupts = <GIC_SPI 169 IRQ_TYPE_EDGE_RISING>;
> + clocks = <&xtal>, <&xtal>, <&xtal>;
> + clock-names = "xtal", "pclk", "baud";
> + status = "disabled";
> + };
> + };
> + };
> +};
>
> --
> 2.37.1
>
>
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--
Thank you,
Dmitry