netdev - Re: [PATCH v5 05/12] riscv: dts: starfive: jh7110: Add ethernet device nodes

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Date:   Fri, 3 Mar 2023 14:45:44 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Samin Guo <samin.guo@...rfivetech.com>
Cc:     linux-riscv@...ts.infradead.org, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Richard Cochran <richardcochran@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Peter Geis <pgwipeout@...il.com>,
        Yanhong Wang <yanhong.wang@...rfivetech.com>
Subject: Re: [PATCH v5 05/12] riscv: dts: starfive: jh7110: Add ethernet
 device nodes

> +		gmac0: ethernet@...30000 {
> +			compatible = "starfive,jh7110-dwmac", "snps,dwmac-5.20";
> +			reg = <0x0 0x16030000 0x0 0x10000>;
> +			clocks = <&aoncrg JH7110_AONCLK_GMAC0_AXI>,
> +				 <&aoncrg JH7110_AONCLK_GMAC0_AHB>,
> +				 <&syscrg JH7110_SYSCLK_GMAC0_PTP>,
> +				 <&aoncrg JH7110_AONCLK_GMAC0_TX_INV>,
> +				 <&syscrg JH7110_SYSCLK_GMAC0_GTXC>;
> +			clock-names = "stmmaceth", "pclk", "ptp_ref",
> +				      "tx", "gtx";
> +			resets = <&aoncrg JH7110_AONRST_GMAC0_AXI>,
> +				 <&aoncrg JH7110_AONRST_GMAC0_AHB>;
> +			reset-names = "stmmaceth", "ahb";
> +			interrupts = <7>, <6>, <5>;
> +			interrupt-names = "macirq", "eth_wake_irq", "eth_lpi";
> +			phy-mode = "rgmii-id";

phy-mode is a board property, not a SoC property. It should be in the
board .dts file, not the SoC .dtsi file.

> +			snps,multicast-filter-bins = <64>;
> +			snps,perfect-filter-entries = <8>;
> +			rx-fifo-depth = <2048>;
> +			tx-fifo-depth = <2048>;
> +			snps,fixed-burst;
> +			snps,no-pbl-x8;
> +			snps,force_thresh_dma_mode;
> +			snps,axi-config = <&stmmac_axi_setup>;
> +			snps,tso;
> +			snps,en-tx-lpi-clockgating;
> +			snps,txpbl = <16>;
> +			snps,rxpbl = <16>;
> +			status = "disabled";
> +			phy-handle = <&phy0>;

The PHY is external, so this is also a board property, not a SoC
property. 

> +
> +			mdio {
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +				compatible = "snps,dwmac-mdio";
> +
> +				phy0: ethernet-phy@0 {
> +					reg = <0>;
> +				};

The PHY is also a board property. You could for example design a board
where both PHYs are on one MDIO bus, in order to save two SoC pins.

      Andrew