Re: [PATCH 2/2] arm64: dts: meson-g12a: add initial g12a s905d2 SoC DT support

From: Jerome Brunet
Date: Fri Aug 10 2018 - 07:58:53 EST

On Thu, 2018-08-09 at 16:22 +0800, Jianxin Pan wrote:
> Try to add basic DT support for the Amlogic's Meson-G12A S905D2 SoC,
> 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 <jianxin.pan@xxxxxxxxxxx>

Could please fix your signoff here ? Your last name went missing

> ---
> arch/arm64/boot/dts/amlogic/Makefile | 1 +
> arch/arm64/boot/dts/amlogic/meson-g12a-u200.dts | 22 +++
> arch/arm64/boot/dts/amlogic/meson-g12a.dtsi | 174 ++++++++++++++++++++++++
> 3 files changed, 197 insertions(+)
> create mode 100644 arch/arm64/boot/dts/amlogic/meson-g12a-u200.dts
> create mode 100644 arch/arm64/boot/dts/amlogic/meson-g12a.dtsi
>
> diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
> index a97c0e2..c31f29d6 100644
> --- a/arch/arm64/boot/dts/amlogic/Makefile
> +++ b/arch/arm64/boot/dts/amlogic/Makefile
> @@ -1,5 +1,6 @@
> # SPDX-License-Identifier: GPL-2.0
> dtb-$(CONFIG_ARCH_MESON) += meson-axg-s400.dtb
> +dtb-$(CONFIG_ARCH_MESON) += meson-g12a-u200.dtb
> dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-nanopi-k2.dtb
> dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-nexbox-a95x.dtb
> dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-odroidc2.dtb
> diff --git a/arch/arm64/boot/dts/amlogic/meson-g12a-u200.dts b/arch/arm64/boot/dts/amlogic/meson-g12a-u200.dts
> new file mode 100644
> index 0000000..d267a37
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/meson-g12a-u200.dts
> @@ -0,0 +1,22 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2018 Amlogic, Inc. All rights reserved.
> + */
> +
> +/dts-v1/;
> +
> +#include "meson-g12a.dtsi"
> +
> +/ {
> + compatible = "amlogic,u200", "amlogic,g12a";
> + model = "Amlogic Meson G12A U200 Development Board";
> +
> + aliases {
> + serial0 = &uart_AO;
> + };
> +};
> +
> +&uart_AO {
> + status = "okay";
> +};
> +
> diff --git a/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi
> new file mode 100644
> index 0000000..64a0f2e
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi
> @@ -0,0 +1,174 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2018 Amlogic, Inc. All rights reserved.
> + */
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +/ {

Could you please order the subnodes alphabetically ?

In general, we should try to order nodes by addresses when there is one and
alphabetically when there is none. This is something we have to fix for the AXG
as well.


> + compatible = "amlogic,g12a";
> +
> + interrupt-parent = <&gic>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> +
> + reserved-memory {
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> +
> + /* Alternate 3 MiB reserved for ARM Trusted Firmware (BL31) */

It's the only one (for now at least) so it's not really an alternate, isn't it ?

> + secmon_reserved: secmon@5000000 {
> + reg = <0x0 0x05000000 0x0 0x300000>;
> + no-map;
> + };
> + };
> +
> + cpus {
> + #address-cells = <0x2>;
> + #size-cells = <0x0>;
> +
> + cpu0: cpu@0 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53", "arm,armv8";
> + reg = <0x0 0x0>;
> + enable-method = "psci";
> + next-level-cache = <&l2>;
> + };
> +
> + cpu1: cpu@1 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53", "arm,armv8";
> + reg = <0x0 0x1>;
> + enable-method = "psci";
> + next-level-cache = <&l2>;
> + };
> +
> + cpu2: cpu@2 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53", "arm,armv8";
> + reg = <0x0 0x2>;
> + enable-method = "psci";
> + next-level-cache = <&l2>;
> + };
> +
> + cpu3: cpu@3 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53", "arm,armv8";
> + reg = <0x0 0x3>;
> + enable-method = "psci";
> + next-level-cache = <&l2>;
> + };
> +
> + l2: l2-cache0 {
> + compatible = "cache";
> + };
> + };
> +
> + psci {
> + compatible = "arm,psci-1.0";
> + method = "smc";
> + };
> +
> + 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>;
> + };
> +
> + soc {
> + compatible = "simple-bus";
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;

Could you please order the different bus by ascending addresses ?


> +
> + apb: apb@ffe00000 {
> + compatible = "simple-bus";
> + reg = <0x0 0xffe00000 0x0 0x200000>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges = <0x0 0x0 0x0 0xffe00000 0x0 0x200000>;
> + };
> +
> + cbus: bus@ffd00000 {
> + compatible = "simple-bus";
> + reg = <0x0 0xffd00000 0x0 0x25000>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges = <0x0 0x0 0x0 0xffd00000 0x0 0x25000>;
> +
> + };
> +
> + gic: interrupt-controller@ffc01000 {
> + compatible = "arm,gic-400";
> + reg = <0x0 0xffc01000 0 0x1000>,
> + <0x0 0xffc02000 0 0x2000>,
> + <0x0 0xffc04000 0 0x2000>,
> + <0x0 0xffc06000 0 0x2000>;
> + interrupt-controller;
> + interrupts = <GIC_PPI 9
> + (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_HIGH)>;
> + #interrupt-cells = <3>;
> + #address-cells = <0>;
> + };
> +
> + hiubus: bus@ff63c000 {
> + compatible = "simple-bus";
> + reg = <0x0 0xff63c000 0x0 0x1c00>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges = <0x0 0x0 0x0 0xff63c000 0x0 0x1c00>;
> +
> + };
> +
> + periphs: periphs@ff634000 {
> + compatible = "simple-bus";
> + reg = <0x0 0xff634000 0x0 0x2000>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges = <0x0 0x0 0x0 0xff634000 0x0 0x2000>;
> + };
> +
> + aobus: bus@ff800000 {
> + compatible = "simple-bus";
> + reg = <0x0 0xff800000 0x0 0x100000>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges = <0x0 0x0 0x0 0xff800000 0x0 0x100000>;
> +
> + uart_AO: serial@3000 {
> + compatible = "amlogic,meson-gx-uart", "amlogic,meson-ao-uart";
> + reg = <0x0 0x3000 0x0 0x18>;
> + interrupts = <GIC_SPI 193 IRQ_TYPE_EDGE_RISING>;
> + clocks = <&xtal>, <&xtal>, <&xtal>;
> + clock-names = "xtal", "pclk", "baud";
> + status = "disabled";
> + };
> +
> + uart_AO_B: serial@4000 {
> + compatible = "amlogic,meson-gx-uart", "amlogic,meson-ao-uart";
> + reg = <0x0 0x4000 0x0 0x18>;
> + interrupts = <GIC_SPI 197 IRQ_TYPE_EDGE_RISING>;
> + clocks = <&xtal>, <&xtal>, <&xtal>;
> + clock-names = "xtal", "pclk", "baud";
> + status = "disabled";
> + };
> +
> + };
> + };
> +};