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SubjectRe: [PATCH 4/4] arm64: dts: add support for A1 based Amlogic AD401
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Date
Hi,

On 03/09/2019 08:51, Jianxin Pan wrote:
> Add basic support for the Amlogic A1 based Amlogic AD401 board:
> which describe components as follows: Reserve Memory, CPU, GIC, IRQ,
> Timer, UART. It's capable of booting up into the serial console.
>
> Signed-off-by: Jianxin Pan <jianxin.pan@amlogic.com>
> ---
> arch/arm64/boot/dts/amlogic/Makefile | 1 +
> arch/arm64/boot/dts/amlogic/meson-a1-ad401.dts | 30 ++++++
> arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 121 +++++++++++++++++++++++++
> 3 files changed, 152 insertions(+)
> create mode 100644 arch/arm64/boot/dts/amlogic/meson-a1-ad401.dts
> create mode 100644 arch/arm64/boot/dts/amlogic/meson-a1.dtsi
>
> diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
> index edbf128..1720c45 100644
> --- a/arch/arm64/boot/dts/amlogic/Makefile
> +++ b/arch/arm64/boot/dts/amlogic/Makefile
> @@ -36,3 +36,4 @@ dtb-$(CONFIG_ARCH_MESON) += meson-gxm-rbox-pro.dtb
> dtb-$(CONFIG_ARCH_MESON) += meson-gxm-vega-s96.dtb
> dtb-$(CONFIG_ARCH_MESON) += meson-sm1-sei610.dtb
> dtb-$(CONFIG_ARCH_MESON) += meson-sm1-khadas-vim3l.dtb
> +dtb-$(CONFIG_ARCH_MESON) += meson-a1-ad401.dtb
> diff --git a/arch/arm64/boot/dts/amlogic/meson-a1-ad401.dts b/arch/arm64/boot/dts/amlogic/meson-a1-ad401.dts
> new file mode 100644
> index 00000000..3c05cc0
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/meson-a1-ad401.dts
> @@ -0,0 +1,30 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2019 Amlogic, Inc. All rights reserved.
> + */
> +
> +/dts-v1/;
> +
> +#include "meson-a1.dtsi"
> +
> +/ {
> + compatible = "amlogic,ad401", "amlogic,a1";
> + model = "Amlogic Meson A1 AD401 Development Board";
> +
> + aliases {
> + serial0 = &uart_AO_B;
> + };
> + chosen {
> + stdout-path = "serial0:115200n8";
> + };
> + memory@0 {
> + device_type = "memory";
> + linux,usable-memory = <0x0 0x0 0x0 0x8000000>;

I'll prefer usage of reg, it's handled the same but linux,usable-memory
is not documented.

> + };
> +};
> +
> +&uart_AO_B {
> + status = "okay";
> + /*pinctrl-0 = <&uart_ao_a_pins>;*/
> + /*pinctrl-names = "default";*/

Please remove these lines instead of commenting them.

> +};
> diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> new file mode 100644
> index 00000000..b98d648
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> @@ -0,0 +1,121 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2019 Amlogic, Inc. All rights reserved.
> + */
> +
> +#include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +/ {
> + compatible = "amlogic,a1";
> +
> + interrupt-parent = <&gic>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> +
> + cpus {
> + #address-cells = <0x2>;
> + #size-cells = <0x0>;
> +
> + cpu0: cpu@0 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a35";
> + reg = <0x0 0x0>;
> + enable-method = "psci";
> + next-level-cache = <&l2>;
> + };
> +
> + cpu1: cpu@1 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a35";
> + reg = <0x0 0x1>;
> + enable-method = "psci";
> + next-level-cache = <&l2>;
> + };
> +
> + l2: l2-cache0 {
> + compatible = "cache";
> + };
> + };
> + psci {
> + compatible = "arm,psci-1.0";
> + method = "smc";
> + };
> +
> + reserved-memory {
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;

Isn't there secmon reserved memory ?

> +
> + linux,cma {
> + compatible = "shared-dma-pool";
> + reusable;
> + size = <0x0 0x800000>;
> + alignment = <0x0 0x400000>;
> + linux,cma-default;
> + };
> + };
> +
> + sm: secure-monitor {
> + compatible = "amlogic,meson-gxbb-sm";
> + };
> +
> + soc {
> + compatible = "simple-bus";
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> +
> + uart_AO: serial@fe001c00 {
> + compatible = "amlogic,meson-gx-uart",
> + "amlogic,meson-ao-uart";
> + reg = <0x0 0xfe001c00 0x0 0x18>;
> + interrupts = <GIC_SPI 25 IRQ_TYPE_EDGE_RISING>;
> + clocks = <&xtal>, <&xtal>, <&xtal>;
> + clock-names = "xtal", "pclk", "baud";
> + status = "disabled";
> + };
> +
> + uart_AO_B: serial@fe002000 {
> + compatible = "amlogic,meson-gx-uart",
> + "amlogic,meson-ao-uart";
> + reg = <0x0 0xfe002000 0x0 0x18>;
> + interrupts = <GIC_SPI 26 IRQ_TYPE_EDGE_RISING>;
> + clocks = <&xtal>, <&xtal>, <&xtal>;
> + clock-names = "xtal", "pclk", "baud";
> + status = "disabled";
> + };
> +
> + gic: interrupt-controller@ff901000 {
> + compatible = "arm,gic-400";
> + reg = <0x0 0xff901000 0x0 0x1000>,
> + <0x0 0xff902000 0x0 0x2000>,
> + <0x0 0xff904000 0x0 0x2000>,
> + <0x0 0xff906000 0x0 0x2000>;
> + interrupt-controller;
> + interrupts = <GIC_PPI 9
> + (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_HIGH)>;
> + #interrupt-cells = <3>;
> + #address-cells = <0>;
> + };
> + };
> +
> + timer {
> + compatible = "arm,armv8-timer";
> + interrupts = <GIC_PPI 13
> + (GIC_CPU_MASK_RAW(0xff) | IRQ_TYPE_LEVEL_LOW)>,
> + <GIC_PPI 14
> + (GIC_CPU_MASK_RAW(0xff) | IRQ_TYPE_LEVEL_LOW)>,
> + <GIC_PPI 11
> + (GIC_CPU_MASK_RAW(0xff) | IRQ_TYPE_LEVEL_LOW)>,
> + <GIC_PPI 10
> + (GIC_CPU_MASK_RAW(0xff) | IRQ_TYPE_LEVEL_LOW)>;
> + };
> +
> + xtal: xtal-clk {
> + compatible = "fixed-clock";
> + clock-frequency = <24000000>;
> + clock-output-names = "xtal";
> + #clock-cells = <0>;
> + };
> +};
>

Thanks,
Neil

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