Re: [PATCH v2 09/11] arm64: allwinner: A100: add the basical Allwinner A100 DTSI file

[Maxime Ripard <maxime@cerno.tech>]

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Hi,

On Mon, Jun 22, 2020 at 10:59:05AM +0800, Frank Lee wrote:
> Allwinner A100 is a new SoC with Cortex-A53 cores, this commit adds
> the basical DTSI file of it, including the clock, i2c, pins, sid, ths,
> and UART support.
> 
> Signed-off-by: Frank Lee <frank@allwinnertech.com>
> ---
>  arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi | 337 +++++++++++++++++++++++++
>  1 file changed, 337 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi
> 
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi
> new file mode 100644
> index 0000000..5133897
> --- /dev/null
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi
> @@ -0,0 +1,337 @@
> +// SPDX-License-Identifier: (GPL-2.0+ or MIT)
> +/*
> + * Copyright (c) 2020 Frank Lee <frank@allwinnertech.com>
> + */
> +
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +#include <dt-bindings/clock/sun50i-a100-ccu.h>
> +#include <dt-bindings/clock/sun50i-a100-r-ccu.h>
> +#include <dt-bindings/reset/sun50i-a100-ccu.h>
> +#include <dt-bindings/reset/sun50i-a100-r-ccu.h>
> +
> +/ {
> +	interrupt-parent = <&gic>;
> +	#address-cells = <2>;
> +	#size-cells = <2>;
> +
> +	cpus {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		cpu0: cpu@0 {
> +			compatible = "arm,armv8";
> +			device_type = "cpu";
> +			reg = <0x0>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu@1 {
> +			compatible = "arm,armv8";
> +			device_type = "cpu";
> +			reg = <0x1>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu@2 {
> +			compatible = "arm,armv8";
> +			device_type = "cpu";
> +			reg = <0x2>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu@3 {
> +			compatible = "arm,armv8";
> +			device_type = "cpu";
> +			reg = <0x3>;
> +			enable-method = "psci";
> +		};
> +	};
> +
> +	psci {
> +		compatible = "arm,psci-1.0";
> +		method = "smc";
> +	};
> +
> +	iosc: internal-osc-clk {
> +		compatible = "fixed-clock";
> +		clock-frequency = <16000000>;
> +		clock-accuracy = <300000000>;
> +		clock-output-names = "iosc";
> +		#clock-cells = <0>;
> +	};
> +
> +	dcxo24M: dcxo24M_clk {

You shouldn't have underscores in the node names.

> +		compatible = "fixed-clock";
> +		clock-frequency = <24000000>;
> +		clock-output-names = "dcxo24M";
> +		#clock-cells = <0>;
> +	};
> +
> +	osc32k: osc32k_clk {

Same thing here

Also, ordering by node name here would be nice

> +		compatible = "fixed-clock";
> +		clock-frequency = <32768>;
> +		clock-output-names = "osc32k";
> +		#clock-cells = <0>;
> +	};
> +
> +	timer {
> +		compatible = "arm,armv8-timer";
> +		interrupts = <GIC_PPI 13
> +			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
> +			     <GIC_PPI 14
> +			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
> +			     <GIC_PPI 11
> +			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
> +			     <GIC_PPI 10
> +			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
> +	};

Does it suffer from the same time instability than the one in the A64?
If so, you probably want to enable the workaround too.

> +	soc: soc {

Do you really need a label for that node?

> +		compatible = "simple-bus";
> +		#address-cells = <2>;
> +		#size-cells = <2>;

Why do you need cells with 2 items here? You don't seem to be using
them.

> +		r_i2c0: i2c@7081400 {
> +			compatible = "allwinner,sun6i-a31-i2c";
> +			reg = <0x0 0x07081400 0x0 0x400>;
> +			interrupts = <GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&ccu CLK_BUS_I2C0>;
> +			resets = <&ccu RST_BUS_I2C0>;
> +			pinctrl-names = "default";
> +			pinctrl-0 = <&r_i2c0_pins>;
> +			status = "disabled";
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +		};
> +
> +		r_i2c1: i2c@7081800 {
> +			compatible = "allwinner,sun6i-a31-i2c";
> +			reg = <0x0 0x07081800 0x0 0x400>;
> +			interrupts = <GIC_SPI 114 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&ccu CLK_BUS_I2C1>;
> +			resets = <&ccu RST_BUS_I2C1>;
> +			pinctrl-names = "default";
> +			pinctrl-0 = <&r_i2c1_pins>;
> +			status = "disabled";
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +		};
> +	};

The clocks and resets phandles and IDs don't look right

> +	thermal-zones {
> +		cpu_thermal_zone {
> +			polling-delay-passive = <0>;
> +			polling-delay = <0>;
> +			thermal-sensors = <&ths 0>;
> +		};

Please add a new line here

> +		gpu_thermal_zone{

You should have a space here    ^ 

> +			polling-delay-passive = <0>;
> +			polling-delay = <0>;
> +			thermal-sensors = <&ths 1>;
> +		};

newline

> +		ddr_thermal_zone{

space                           ^ 

Thanks!
Maxime

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