linux-kernel - Re: [PATCH 15/17] arm64: allwinner: dts: add DTSI file for R329 SoC

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Message-ID: <6863e247-9ae5-0f90-bf99-8989efd45352@sholland.org>
Date:   Thu, 19 Aug 2021 21:59:08 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Icenowy Zheng <icenowy@...eed.com>,
        Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Andre Przywara <andre.przywara@....com>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 15/17] arm64: allwinner: dts: add DTSI file for R329 SoC

On 8/2/21 1:22 AM, Icenowy Zheng wrote:
> Allwinner R329 is a new SoC focused on smart audio devices.
> 
> Add a DTSI file for it.
> 
> Signed-off-by: Icenowy Zheng <icenowy@...eed.com>
> ---
>  .../arm64/boot/dts/allwinner/sun50i-r329.dtsi | 244 ++++++++++++++++++
>  1 file changed, 244 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-r329.dtsi

One comment below.

All of my other concerns are about the CCU and RTC bindings, which I have
commented on elsewhere.

Regards,
Samuel

> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-r329.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-r329.dtsi
> new file mode 100644
> index 000000000000..bfefa2b734b0
> --- /dev/null
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-r329.dtsi
> @@ -0,0 +1,244 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +// Copyright (c) 2021 Sipeed
> +
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +#include <dt-bindings/clock/sun50i-r329-ccu.h>
> +#include <dt-bindings/reset/sun50i-r329-ccu.h>
> +#include <dt-bindings/clock/sun50i-r329-r-ccu.h>
> +#include <dt-bindings/reset/sun50i-r329-r-ccu.h>
> +
> +/ {
> +	interrupt-parent = <&gic>;
> +	#address-cells = <1>;
> +	#size-cells = <1>;
> +
> +	cpus {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		cpu0: cpu@0 {
> +			compatible = "arm,cortex-a53";
> +			device_type = "cpu";
> +			reg = <0>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu1: cpu@1 {
> +			compatible = "arm,cortex-a53";
> +			device_type = "cpu";
> +			reg = <1>;
> +			enable-method = "psci";
> +		};
> +	};
> +
> +	osc24M: osc24M_clk {
> +		#clock-cells = <0>;
> +		compatible = "fixed-clock";
> +		clock-frequency = <24000000>;
> +		clock-output-names = "osc24M";
> +	};
> +
> +	psci {
> +		compatible = "arm,psci-0.2";
> +		method = "smc";
> +	};
> +
> +	timer {
> +		compatible = "arm,armv8-timer";
> +		arm,no-tick-in-suspend;
> +		interrupts = <GIC_PPI 13
> +			(GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_HIGH)>,
> +			     <GIC_PPI 14
> +			(GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_HIGH)>,
> +			     <GIC_PPI 11
> +			(GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_HIGH)>,
> +			     <GIC_PPI 10
> +			(GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_HIGH)>;
> +	};
> +
> +	soc {
> +		compatible = "simple-bus";
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges;
> +
> +		pio: pinctrl@...0400 {
> +			compatible = "allwinner,sun50i-r329-pinctrl";
> +			reg = <0x02000400 0x400>;
> +			interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>,

There is an IRQ documented for port C (at SPI 70). Do those pins possibly have
interrupt capability?

> +				     <GIC_SPI 71 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&ccu CLK_APB1>, <&osc24M>, <&rtc 0>;
> +			clock-names = "apb", "hosc", "losc";
> +			gpio-controller;
> +			#gpio-cells = <3>;
> +			interrupt-controller;
> +			#interrupt-cells = <3>;