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[v8,08/11] ARM: dts: aspeed: anacapa: evt2: Add shunt resistor values for HSC monitors

Message ID 20260902-anacapa-devlop-phase-devicetree-v8-8-69c8eb2a7cda@gmail.com
State New
Headers show
Series ARM: dts: aspeed: anacapa: restructure devicetree for development-phase | expand

Commit Message

Colin Huang Sept. 2, 2026, 10:21 a.m. UTC 
From: Peter Shen <peter.shen@amd.com>

Add shunt resistor configuration for LTC4287 hot-swap controllers on
Anacapa EVT2 platform.

The resistor values are required for accurate current and power
measurement by the driver. These settings reflect the actual BOM used
on EVT2, where different sense resistor values (150 uOhm and 250 uOhm)
are populated across rails.

Without this configuration, the reported readings would be incorrect.

Signed-off-by: Peter Shen <peter.shen@amd.com>
---
 .../aspeed/aspeed-bmc-facebook-anacapa-evt2.dtsi   | 42 ++++++++++++++++++++++
 1 file changed, 42 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-evt2.dtsi b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-evt2.dtsi
index ab16e5ad5871..5f849bd21fe0 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-evt2.dtsi
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-evt2.dtsi
@@ -37,6 +37,30 @@  gpio@24 {
 					"RPDB_FAN7_PRSNT_N_R", "RPDB_FAN8_PRSNT_N_R",
 					"", "";
 			};
+
+			power-monitor@42 {
+				compatible = "lltc,ltc4287";
+				reg = <0x42>;
+				shunt-resistor-micro-ohms = <150>;
+			};
+
+			power-monitor@43 {
+				compatible = "lltc,ltc4287";
+				reg = <0x43>;
+				shunt-resistor-micro-ohms = <150>;
+			};
+
+			power-monitor@44 {
+				compatible = "lltc,ltc4287";
+				reg = <0x44>;
+				shunt-resistor-micro-ohms = <250>;
+			};
+
+			power-monitor@45 {
+				compatible = "lltc,ltc4287";
+				reg = <0x45>;
+				shunt-resistor-micro-ohms = <250>;
+			};
 		};
 
 		i2c@1 {
@@ -51,6 +75,24 @@  gpio@24 {
 					"","",
 					"","";
 			};
+
+			power-monitor@40 {
+				compatible = "lltc,ltc4287";
+				reg = <0x40>;
+				shunt-resistor-micro-ohms = <150>;
+			};
+
+			power-monitor@41 {
+				compatible = "lltc,ltc4287";
+				reg = <0x41>;
+				shunt-resistor-micro-ohms = <150>;
+			};
+
+			power-monitor@45 {
+				compatible = "lltc,ltc4287";
+				reg = <0x45>;
+				shunt-resistor-micro-ohms = <250>;
+			};
 		};
 	};
 };