linux-kernel - Re: [PATCH 1/6] arm64: dts: ls2080a-qds: add mdio mux nodes from on-board FPGA

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Message-ID: <20220410011023.GG129381@dragon>
Date:   Sun, 10 Apr 2022 09:10:23 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Li Yang <leoyang.li@....com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] arm64: dts: ls2080a-qds: add mdio mux nodes from
 on-board FPGA

On Thu, Mar 17, 2022 at 02:01:04PM -0500, Li Yang wrote:
> Add mmio mdio mux nodes from the on-board FPGA.
> 
> Signed-off-by: Li Yang <leoyang.li@....com>
> ---
>  .../boot/dts/freescale/fsl-ls2080a-qds.dts    | 69 +++++++++++++++++++
>  1 file changed, 69 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/fsl-ls2080a-qds.dts b/arch/arm64/boot/dts/freescale/fsl-ls2080a-qds.dts
> index f6c3ee78ace0..c3caca1c0ab6 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-ls2080a-qds.dts
> +++ b/arch/arm64/boot/dts/freescale/fsl-ls2080a-qds.dts
> @@ -23,3 +23,72 @@ chosen {
>  		stdout-path = "serial0:115200n8";
>  	};
>  };
> +
> +/* Update DPMAC connections to external PHYs, under SerDes 0x2a_0x49. */
> +&dpmac9 {
> +	phy-handle = <&mdio0_phy12>;
> +	phy-connection-type = "sgmii";
> +};
> +
> +&dpmac10 {
> +	phy-handle = <&mdio0_phy13>;
> +	phy-connection-type = "sgmii";
> +};
> +
> +&dpmac11 {
> +	phy-handle = <&mdio0_phy14>;
> +	phy-connection-type = "sgmii";
> +};
> +
> +&dpmac12 {
> +	phy-handle = <&mdio0_phy15>;
> +	phy-connection-type = "sgmii";
> +};
> +
> +&ifc {
> +	boardctrl: board-control@3,0 {
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		compatible = "fsl,tetra-fpga", "fsl,fpga-qixis", "simple-mfd";
> +		reg = <3 0 0x300>;
> +		ranges = <0 3 0 0x300>;
> +
> +		mdio_mux_emi1 {
> +			compatible = "mdio-mux-mmioreg", "mdio-mux";
> +			mdio-parent-bus = <&emdio1>;
> +			reg = <0x54 1>;		/* BRDCFG4 */

Please ensure the patch doesn't introduce additional DTC warnings.  I
think 'reg' should present only in nodes with a matching unit-address.

Shawn

> +			mux-mask = <0xe0>;	/* EMI1_MDIO */
> +
> +			#address-cells=<1>;
> +			#size-cells = <0>;
> +
> +			/* Child MDIO buses, one for each riser card:
> +			 * reg = 0x0, 0x20, 0x40, 0x60, 0x80, 0xa0.
> +			 * VSC8234 PHYs on the riser cards.
> +			 */
> +
> +			mdio_mux3: mdio@60 {
> +				reg = <0x60>;
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +
> +				mdio0_phy12: mdio_phy0@1c {
> +					reg = <0x1c>;
> +				};
> +
> +				mdio0_phy13: mdio_phy1@1d {
> +					reg = <0x1d>;
> +				};
> +
> +				mdio0_phy14: mdio_phy2@1e {
> +					reg = <0x1e>;
> +				};
> +
> +				mdio0_phy15: mdio_phy3@1f {
> +					reg = <0x1f>;
> +				};
> +			};
> +		};
> +	};
> +};
> +
> -- 
> 2.25.1
>