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[61.220.246.151]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2beb56ca7fcsm12578965ad.27.2026.05.22.03.07.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 May 2026 03:07:39 -0700 (PDT) From: Mike Hsieh Date: Fri, 22 May 2026 18:07:59 +0800 Subject: [PATCH] ARM: dts: aspeed: clemente: Remove IOB NIC TMP421 nodes Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260522-clemente-dts-remove-iob-nic-tmp421-v1-1-ee2509a71502@gmail.com> X-B4-Tracking: v=1; b=H4sIAP4qEGoC/x2NwQqDMBAFf0X23AWzWKv9leJBk9e60CSSBBHEf 2/ocWCYOSkjKTI9m5MSds0aQwVza8iuc/iA1VUmaaVv7yJsv/AIBexK5gQf96rEhYNaLn7rxPA wiphlHnvnHlRDW8Jbj//kNV3XDx3uQYl0AAAA To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Joel Stanley , Andrew Jeffery Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org, Cosmo Chou , Potin Lai , Mike Hsieh , Mike Hsieh X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1779444505; l=2434; i=mike.quanta.115@gmail.com; s=20260522; h=from:subject:message-id; bh=wtlP5mDXTH5K/7QxsvRUAfm1OYc62utepzzfVM0/B50=; b=KLgj3/Kt/F4ZL7TX8xSgNpcSgNFF5ozk+usyLONCgjiPTj8WwcI44UHldShUeFupva5JOA4mc aO2epW3mC0lBf/O70Ti3tjy+UUJ7hC8IXmOe9+Kts9QgvR2Hyd6G8Bl X-Developer-Key: i=mike.quanta.115@gmail.com; a=ed25519; pk=DRIErV0xX0KMBlR/irAsbuN4L3egitHbC8FHruUH4HE= Remove the TMP421 sensor entry from the DTS, as it is no longer the primary telemetry source. Accessing the CX8 NIC via I2C while it is powered off causes voltage leakage on the bus, leading to EEPROM corruption on shared I2C devices. Removing this node prevents the BMC from initiating traffic to the NIC during initialization, protecting the integrity of the shared bus. Signed-off-by: Mike Hsieh --- Remove the TMP421 sensor entry from the DTS, as it is no longer the primary telemetry source. Accessing the CX8 NIC via I2C while it is powered off causes voltage leakage on the bus, leading to EEPROM corruption on shared I2C devices. Removing this node prevents the BMC from initiating traffic to the NIC during initialization, protecting the integrity of the shared bus. --- .../boot/dts/aspeed/aspeed-bmc-facebook-clemente.dts | 20 ----------------= ---- 1 file changed, 20 deletions(-) diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-clemente.dts b/ar= ch/arm/boot/dts/aspeed/aspeed-bmc-facebook-clemente.dts index 2aff21442f11..820d39a92974 100644 --- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-clemente.dts +++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-clemente.dts @@ -443,11 +443,6 @@ i2c0mux2ch0: i2c@0 { #address-cells =3D <1>; #size-cells =3D <0>; reg =3D <0>; - // IOB0 NIC0 TEMP - temperature-sensor@1f { - compatible =3D "ti,tmp421"; - reg =3D <0x1f>; - }; }; =20 i2c0mux2ch1: i2c@1 { @@ -466,11 +461,6 @@ i2c0mux2ch3: i2c@3 { #address-cells =3D <1>; #size-cells =3D <0>; reg =3D <3>; - // IOB0 NIC1 TEMP - temperature-sensor@1f { - compatible =3D "ti,tmp421"; - reg =3D <0x1f>; - }; }; }; =20 @@ -637,11 +627,6 @@ i2c0mux5ch0: i2c@0 { #address-cells =3D <1>; #size-cells =3D <0>; reg =3D <0>; - // IOB1 NIC0 TEMP - temperature-sensor@1f { - compatible =3D "ti,tmp421"; - reg =3D <0x1f>; - }; }; =20 i2c0mux5ch1: i2c@1 { @@ -666,11 +651,6 @@ i2c0mux5ch3: i2c@3 { #address-cells =3D <1>; #size-cells =3D <0>; reg =3D <3>; - // IOB1 NIC1 TEMP - temperature-sensor@1f { - compatible =3D "ti,tmp421"; - reg =3D <0x1f>; - }; }; }; }; --- base-commit: 6779b50faa562e6cca1aa6a4649a4d764c6c7e28 change-id: 20260522-clemente-dts-remove-iob-nic-tmp421-89221ba96dd7 Best regards, --=20 Mike Hsieh