linux-kernel - Re: [PATCH 2/2] ARM: dts: aspeed: add device tree for ASRock Rack ALTRAD8 BMC

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Message-ID: <92bcdac9-44b1-4fc8-892a-01ef0ed0b7e0@bsdio.com>
Date: Tue, 16 Sep 2025 12:40:15 -0600
From: Rebecca Cran <rebecca@...io.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Joel Stanley <joel@....id.au>,
 Andrew Jeffery <andrew@...econstruct.com.au>, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-aspeed@...ts.ozlabs.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] ARM: dts: aspeed: add device tree for ASRock Rack
 ALTRAD8 BMC

On 9/15/25 18:37, Andrew Lunn wrote:

> And does it have a PHY? On an MDIO bus? Unless i'm mistaken, you don't
> describe the PHY, a phy-handle pointing to the PHY, and don't have
> phy-mode = 'rgmii-id'.

I've been trying to figure this out. Yes, it's connected to a PHY (an 
RTL8211E).

At the moment it's being detected by OpenBMC as:

ftgmac100 1e680000.ethernet: Read MAC address 9c:6b:00:43:0b:bd from 
device tree
RTL8211E Gigabit Ethernet 1e680000.ethernet--1:00: attached PHY driver 
(mii_bus:phy_addr=1e680000.ethernet--1:00, irq=POLL)
ftgmac100 1e680000.ethernet eth1: irq 43, mapped at 7e548db4
ftgmac100 1e680000.ethernet eth1: Link is Up - 1Gbps/Full - flow control 
rx/tx


aspeed-g5.dtsi has:

mac1: ethernet@...80000 {
     compatible = "aspeed,ast2500-mac", "faraday,ftgmac100";
     reg = <0x1e680000 0x180>;
     interrupts = <3>;
     clocks = <&syscon ASPEED_CLK_GATE_MAC2CLK>;
     status = "disabled";

};


It doesn't define a PHY, but I presume I can't define one without it 
conflicting with the definition of mac1.


-- 
Rebecca Cran