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dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.117.160 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.117.160; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.117.160) by MWH0EPF000C6185.mail.protection.outlook.com (10.167.249.117) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9891.9 via Frontend Transport; Tue, 5 May 2026 05:06:30 +0000 Received: from rnnvmail201.nvidia.com (10.129.68.8) by mail.nvidia.com (10.129.200.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Mon, 4 May 2026 22:06:06 -0700 Received: from nvidia.com (10.126.231.37) by rnnvmail201.nvidia.com (10.129.68.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Mon, 4 May 2026 22:06:03 -0700 From: Ender Hsieh To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Joel Stanley , "Andrew Jeffery" CC: , , , , Andrew Lunn , Marc Olberding , Jacky Chou Subject: [PATCH 1/1] ARM: dts: aspeed: msx4: enable BMC networking via MAC0 Date: Tue, 5 May 2026 14:05:41 +0900 Message-ID: <20260505050541.3031447-2-andhsieh@nvidia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260505050541.3031447-1-andhsieh@nvidia.com> References: <20260505050541.3031447-1-andhsieh@nvidia.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.126.231.37] X-ClientProxiedBy: rnnvmail202.nvidia.com (10.129.68.7) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MWH0EPF000C6185:EE_|LVUPR12MB999161:EE_ X-MS-Office365-Filtering-Correlation-Id: b6dfb283-c59d-4586-f2c9-08deaa6411b7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700016|376014|7416014|82310400026|13003099007|22082099003|56012099003|18002099003; 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The PHY is attached to MDIO3 at address 2 and uses RGMII with PHY-internal delays. These nodes were intentionally omitted in commit f28674fab34f ("ARM: dts: aspeed: Add NVIDIA MSX4 HPM") at Andrew Lunn's request, pending clarification of the RGMII delay handling. Following his guidance on linux-aspeed, the bootloader has been modified to stop enabling MAC clock delays on the SoC side, so phy-mode = "rgmii-id" correctly results in the PHY adding the required ~2ns delay without any double-delay from the MAC controller. The corresponding U-Boot change has been submitted to openbmc/u-boot. Link: https://patch.msgid.link/eac09481-0ba1-4ac2-ad8c-d859822ff0d5@lunn.ch Link: https://patch.msgid.link/20260504044702.2613879-1-andhsieh@nvidia.com Cc: Andrew Lunn Cc: Marc Olberding Signed-off-by: Ender Hsieh --- .../dts/aspeed/aspeed-bmc-nvidia-msx4-bmc.dts | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-msx4-bmc.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-msx4-bmc.dts index a12d4164de4a..29f56176e2ca 100644 --- a/arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-msx4-bmc.dts +++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-msx4-bmc.dts @@ -208,6 +208,21 @@ &lpc_reset { status = "okay"; }; +&mac0 { + phy-mode = "rgmii-id"; + phy-handle = <ðphy3>; + status = "okay"; +}; + +&mdio3 { + status = "okay"; + + ethphy3: ethernet-phy@2 { + compatible = "ethernet-phy-ieee802.3-c22"; + reg = <2>; + }; +}; + &rtc { status = "okay"; }; -- 2.34.1