linux-kernel - Re: [PATCH v2 2/2] arm64: dts: rockchip: Add Radxa ROCK 4D device tree

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Message-ID: <b5977d21-aa39-4e91-863b-cc7f9dc6938c@kwiboo.se>
Date: Thu, 13 Feb 2025 16:48:10 +0100
From: Jonas Karlman <jonas@...boo.se>
To: Detlev Casanova <detlev.casanova@...labora.com>
Cc: linux-kernel@...r.kernel.org, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>,
 Dragan Simic <dsimic@...jaro.org>, Chris Morgan <macromorgan@...mail.com>,
 Kever Yang <kever.yang@...k-chips.com>, Tim Lunn <tim@...thertop.org>,
 FUKAUMI Naoki <naoki@...xa.com>,
 Michael Riesch <michael.riesch@...fvision.net>,
 Weizhao Ouyang <weizhao.ouyang@....com>, Elon Zhang
 <zhangzj@...k-chips.com>, Alexey Charkov <alchark@...il.com>,
 Stephen Chen <stephen@...xa.com>, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org,
 kernel@...labora.com
Subject: Re: [PATCH v2 2/2] arm64: dts: rockchip: Add Radxa ROCK 4D device
 tree

Hi Detlev,

On 2025-02-13 15:57, Detlev Casanova wrote:
> From: Stephen Chen <stephen@...xa.com>
> 
> The Radxa ROCK 4D board is based on the Rockchip rk3576 SoC.
> 
> The device tree adds support for basic devices:
>  - UART
>  - SD Card
>  - Ethernet
>  - USB
>  - RTC
> 
> It has 4 USB ports but only 3 are usable as the top left one is used
> for maskrom.
> 
> It has a USB-C port that is only used for powering the board.
> 
> Signed-off-by: Stephen Chen <stephen@...xa.com>
> Signed-off-by: Detlev Casanova <detlev.casanova@...labora.com>
> ---
>  arch/arm64/boot/dts/rockchip/Makefile         |   1 +
>  .../boot/dts/rockchip/rk3576-rock-4d.dts      | 651 ++++++++++++++++++
>  2 files changed, 652 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
> 
> diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
> index def1222c1907e..a112aeb37948a 100644
> --- a/arch/arm64/boot/dts/rockchip/Makefile
> +++ b/arch/arm64/boot/dts/rockchip/Makefile
> @@ -132,6 +132,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-wolfvision-pf5-display-vz.dtbo
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-wolfvision-pf5-io-expander.dtbo
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-armsom-sige5.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-evb1-v10.dtb
> +dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-rock-4d.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3582-radxa-e52c.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-armsom-sige7.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-armsom-w3.dtb
> diff --git a/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
> new file mode 100644
> index 0000000000000..f356742f9d643
> --- /dev/null
> +++ b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
> @@ -0,0 +1,651 @@

[snip]

> +&gmac0 {
> +	phy-mode = "rgmii-id";
> +	clock_in_out = "output";
> +
> +	snps,reset-gpio = <&gpio2 RK_PB5 GPIO_ACTIVE_LOW>;
> +	snps,reset-active-low;
> +	snps,reset-delays-us = <0 20000 100000>;

The snps,reset- props are deprecated and should be changed to reset-
props in the phy node.

> +
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&eth0m0_miim
> +		     &eth0m0_tx_bus2
> +		     &eth0m0_rx_bus2
> +		     &eth0m0_rgmii_clk
> +		     &eth0m0_rgmii_bus
> +		     &ethm0_clk0_25m_out>;
> +
> +	phy-handle = <&rgmii_phy0>;
> +	status = "okay";
> +};

[snip]

> +&mdio0 {
> +	rgmii_phy0: phy@1 {

Maybe ethernet-phy@1 ?

> +		compatible = "ethernet-phy-ieee802.3-c22";
> +		reg = <0x1>;
> +		clocks = <&cru REFCLKO25M_GMAC0_OUT>;

Please add reset- props here.

Changing to use reset- props may cause issue if a RTL8211F PHY is used
on the board. Use a ethernet-phy-id compatible or mainline U-Boot to
ensure the Ethernet PHY can be discovered during probe.

Regards,
Jonas

> +	};
> +};
> +

[snip]