linux-kernel - [PATCH v4 5/7] ARM: dts: aspeed: yosemite5: Correct power monitor shunt resistor

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Message-Id: <20260130-yv5_revise_dts-v4-5-4d924455f3a7@gmail.com>
Date: Fri, 30 Jan 2026 16:20:13 +0800
From: Kevin Tung <kevin.tung.openbmc@...il.com>
To: 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>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org, 
 Amithash Prasasd <amithash@...a.com>, Kevin Tung <Kevin.Tung@...ntatw.com>, 
 Ken Chen <Ken.Chen@...ntatw.com>, Leo Yang <Leo-Yang@...ntatw.com>, 
 Jackson Liu <Jackson.Liu@...ntatw.com>, 
 Kevin Tung <kevin.tung.openbmc@...il.com>
Subject: [PATCH v4 5/7] ARM: dts: aspeed: yosemite5: Correct power monitor
 shunt resistor

The shunt resistor value defined in the DTS was incorrect and did not
reflect the resistor value populated on the board. As a result, power
and current readings derived from this value were inaccurate.

This change updates the DTS to use the correct shunt resistor value
according to the hardware design, restoring accurate power and current
measurements.

Signed-off-by: Kevin Tung <kevin.tung.openbmc@...il.com>
---
 arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-yosemite5.dts | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-yosemite5.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-yosemite5.dts
index 84d3731b17f7c7c87338672bbcc859de2b89b722..524597a81365ef10cd03b67d35eeb88a965cbe0a 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-yosemite5.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-yosemite5.dts
@@ -415,7 +415,7 @@ power-sensor@42 {
 	power-monitor@43 {
 		compatible = "lltc,ltc4287";
 		reg = <0x43>;
-		shunt-resistor-micro-ohms = <250>;
+		shunt-resistor-micro-ohms = <100>;
 	};
 
 	power-sensor@44 {
@@ -461,25 +461,25 @@ eeprom@57 {
 	power-monitor@58 {
 		compatible = "renesas,isl28022";
 		reg = <0x58>;
-		shunt-resistor-micro-ohms = <1000>;
+		shunt-resistor-micro-ohms = <10000>;
 	};
 
 	power-monitor@59 {
 		compatible = "renesas,isl28022";
 		reg = <0x59>;
-		shunt-resistor-micro-ohms = <1000>;
+		shunt-resistor-micro-ohms = <10000>;
 	};
 
 	power-monitor@5a {
 		compatible = "renesas,isl28022";
 		reg = <0x5a>;
-		shunt-resistor-micro-ohms = <1000>;
+		shunt-resistor-micro-ohms = <10000>;
 	};
 
 	power-monitor@5b {
 		compatible = "renesas,isl28022";
 		reg = <0x5b>;
-		shunt-resistor-micro-ohms = <1000>;
+		shunt-resistor-micro-ohms = <10000>;
 	};
 
 	psu@5c {
@@ -723,13 +723,13 @@ gpio-expander@21 {
 	power-sensor@40 {
 		compatible = "ti,ina230";
 		reg = <0x40>;
-		shunt-resistor = <2000>;
+		shunt-resistor = <1000>;
 	};
 
 	power-sensor@41 {
 		compatible = "ti,ina230";
 		reg = <0x41>;
-		shunt-resistor = <2000>;
+		shunt-resistor = <1000>;
 	};
 
 	power-sensor@42 {

-- 
2.52.0