linux-kernel - Re: [PATCH 2/2] arm64: dts: marvell: add support for Methode eDPU

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Date:   Tue, 10 May 2022 12:20:02 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Robert Marko <robert.marko@...tura.hr>, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, andrew@...n.ch,
        gregory.clement@...tlin.com, sebastian.hesselbarth@...il.com,
        shawnguo@...nel.org, linus.walleij@...aro.org, kostap@...vell.com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, pali@...nel.org,
        marek.behun@....cz
Subject: Re: [PATCH 2/2] arm64: dts: marvell: add support for Methode eDPU

On 09/05/2022 13:00, Robert Marko wrote:
> Methode eDPU is an Armada 3720 powered board based on the Methode uDPU.
> 
> They feature the same CPU, RAM, and storage as well as the form factor.
> 
> However, eDPU only has one SFP slot plus a copper G.hn port.
> 
> In order to reduce duplication, split the uDPU DTS into a common one.
> 
> Signed-off-by: Robert Marko <robert.marko@...tura.hr>
> ---
>  arch/arm64/boot/dts/marvell/Makefile          |   1 +
>  .../boot/dts/marvell/armada-3720-eDPU.dts     |  14 ++
>  .../boot/dts/marvell/armada-3720-uDPU.dts     | 148 +---------------
>  .../boot/dts/marvell/armada-3720-uDPU.dtsi    | 163 ++++++++++++++++++
>  4 files changed, 179 insertions(+), 147 deletions(-)
>  create mode 100644 arch/arm64/boot/dts/marvell/armada-3720-eDPU.dts
>  create mode 100644 arch/arm64/boot/dts/marvell/armada-3720-uDPU.dtsi
> 
> diff --git a/arch/arm64/boot/dts/marvell/Makefile b/arch/arm64/boot/dts/marvell/Makefile
> index 1c794cdcb8e6..104d7d7e8215 100644
> --- a/arch/arm64/boot/dts/marvell/Makefile
> +++ b/arch/arm64/boot/dts/marvell/Makefile
> @@ -1,6 +1,7 @@
>  # SPDX-License-Identifier: GPL-2.0
>  # Mvebu SoC Family
>  dtb-$(CONFIG_ARCH_MVEBU) += armada-3720-db.dtb
> +dtb-$(CONFIG_ARCH_MVEBU) += armada-3720-eDPU.dtb
>  dtb-$(CONFIG_ARCH_MVEBU) += armada-3720-espressobin.dtb
>  dtb-$(CONFIG_ARCH_MVEBU) += armada-3720-espressobin-emmc.dtb
>  dtb-$(CONFIG_ARCH_MVEBU) += armada-3720-espressobin-ultra.dtb
> diff --git a/arch/arm64/boot/dts/marvell/armada-3720-eDPU.dts b/arch/arm64/boot/dts/marvell/armada-3720-eDPU.dts
> new file mode 100644
> index 000000000000..6b573a6854cc
> --- /dev/null
> +++ b/arch/arm64/boot/dts/marvell/armada-3720-eDPU.dts
> @@ -0,0 +1,14 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +
> +/dts-v1/;
> +
> +#include "armada-3720-uDPU.dtsi"
> +
> +/ {
> +	model = "Methode eDPU Board";
> +	compatible = "methode,edpu", "marvell,armada3720";

You need also bindings for the board compatible. Someone should convert
the Documentation/devicetree/bindings/arm/marvell/armada-37xx.txt to YAML.

> +};
> +> +	sfp_eth1: sfp-eth1 {

Generic node names, please.

> +		compatible = "sff,sfp";
> +		i2c-bus = <&i2c1>;
> +		los-gpio = <&gpiosb 7 GPIO_ACTIVE_HIGH>;
> +		mod-def0-gpio = <&gpiosb 8 GPIO_ACTIVE_LOW>;
> +		tx-disable-gpio = <&gpiosb 9 GPIO_ACTIVE_HIGH>;
> +		tx-fault-gpio = <&gpiosb 10 GPIO_ACTIVE_HIGH>;
> +		maximum-power-milliwatt = <3000>;
> +	};
> +};
> +
> +&sdhci0 {
> +	status = "okay";
> +	bus-width = <8>;
> +	mmc-ddr-1_8v;
> +	mmc-hs400-1_8v;
> +	marvell,pad-type = "fixed-1-8v";
> +	non-removable;
> +	no-sd;
> +	no-sdio;
> +};
> +
> +&spi0 {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&spi_quad_pins>;
> +
> +	spi-flash@0 {

Run dtbs_check and fix the errors.

> +		compatible = "jedec,spi-nor";
> +		reg = <0>;
> +		spi-max-frequency = <54000000>;
> +
> +		partitions {
> +			compatible = "fixed-partitions";
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			/* only bootloader is located on the SPI */
> +			partition@0 {
> +				label = "firmware";
> +				reg = <0x0 0x180000>;
> +			};
> +
> +			partition@...000 {
> +				label = "u-boot-env";
> +				reg = <0x180000 0x10000>;
> +			};
> +		};
> +	};
> +};
> +
> +&pinctrl_nb {
> +	i2c2_recovery_pins: i2c2-recovery-pins {
> +		groups = "i2c2";
> +		function = "gpio";
> +	};
> +};
> +
> +&i2c1 {
> +	status = "okay";
> +	pinctrl-names = "default", "recovery";
> +	pinctrl-0 = <&i2c2_pins>;
> +	pinctrl-1 = <&i2c2_recovery_pins>;
> +	/delete-property/mrvl,i2c-fast-mode;
> +	scl-gpios = <&gpionb 2 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
> +	sda-gpios = <&gpionb 3 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
> +
> +	nct375@48 {

Generic node names, representing class of a device.

> +		status = "okay";

OK status is by default, why do you need it? Also, it goes as last property.

> +		compatible = "ti,tmp75c";
> +		reg = <0x48>;
> +	};
> +
> +	nct375@49 {
> +		status = "okay";
> +		compatible = "ti,tmp75c";
> +		reg = <0x49>;
> +	};
> +};
> +
> +&eth0 {
> +	status = "okay";
> +	managed = "in-band-status";
> +	phys = <&comphy1 0>;
> +};
> +
> +&eth1 {
> +	phy-mode = "sgmii";
> +	status = "okay";
> +	managed = "in-band-status";
> +	phys = <&comphy0 1>;
> +	sfp = <&sfp_eth1>;
> +};
> +
> +&usb3 {
> +	status = "okay";
> +	phys = <&usb2_utmi_otg_phy>;
> +	phy-names = "usb2-utmi-otg-phy";
> +};
> +
> +&uart0 {
> +	status = "okay";
> +};


Best regards,
Krzysztof