[PATCH] ARM: dts: aspeed: clemente: Remove IOB NIC TMP421 nodes

Mike Hsieh mike.quanta.115 at gmail.com
Fri May 22 03:07:59 PDT 2026


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 <mike.quanta.115 at gmail.com>
---
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/arch/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 at 0 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			reg = <0>;
-			// IOB0 NIC0 TEMP
-			temperature-sensor at 1f {
-				compatible = "ti,tmp421";
-				reg = <0x1f>;
-			};
 		};
 
 		i2c0mux2ch1: i2c at 1 {
@@ -466,11 +461,6 @@ i2c0mux2ch3: i2c at 3 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			reg = <3>;
-			// IOB0 NIC1 TEMP
-			temperature-sensor at 1f {
-				compatible = "ti,tmp421";
-				reg = <0x1f>;
-			};
 		};
 	};
 
@@ -637,11 +627,6 @@ i2c0mux5ch0: i2c at 0 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			reg = <0>;
-			// IOB1 NIC0 TEMP
-			temperature-sensor at 1f {
-				compatible = "ti,tmp421";
-				reg = <0x1f>;
-			};
 		};
 
 		i2c0mux5ch1: i2c at 1 {
@@ -666,11 +651,6 @@ i2c0mux5ch3: i2c at 3 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			reg = <3>;
-			// IOB1 NIC1 TEMP
-			temperature-sensor at 1f {
-				compatible = "ti,tmp421";
-				reg = <0x1f>;
-			};
 		};
 	};
 };

---
base-commit: 6779b50faa562e6cca1aa6a4649a4d764c6c7e28
change-id: 20260522-clemente-dts-remove-iob-nic-tmp421-89221ba96dd7

Best regards,
-- 
Mike Hsieh <mike.quanta.115 at gmail.com>




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