[PATCH v3 9/9] ARM: dts: aspeed: anacapa: evt2: add shunt resistor values for HSC monitors

[Colin Huang via B4 Relay]

From: Peter Shen <peter.shen at 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 at amd.com>
---
 .../aspeed/aspeed-bmc-facebook-anacapa-evt2.dts    | 50 ++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-evt2.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-evt2.dts
index 4a6ae7c6cbf8..59875e9d84fd 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-evt2.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-anacapa-evt2.dts
@@ -8,6 +8,56 @@ / {
 	compatible = "facebook,anacapa-bmc-evt2", "aspeed,ast2600";
 };
 
+// MB - PDB
+&i2c8 {
+
+	i2c-mux at 72 {
+
+		i2c8mux0ch0: i2c at 0 {
+
+			power-monitor at 42 {
+				compatible = "lltc,ltc4287";
+				reg = <0x42>;
+				shunt-resistor-micro-ohms = <150>;
+			};
+			power-monitor at 43 {
+				compatible = "lltc,ltc4287";
+				reg = <0x43>;
+				shunt-resistor-micro-ohms = <150>;
+			};
+			power-monitor at 44 {
+				compatible = "lltc,ltc4287";
+				reg = <0x44>;
+				shunt-resistor-micro-ohms = <250>;
+			};
+			power-monitor at 45 {
+				compatible = "lltc,ltc4287";
+				reg = <0x45>;
+				shunt-resistor-micro-ohms = <250>;
+			};
+		};
+
+		i2c8mux0ch1: i2c at 1 {
+
+			power-monitor at 40 {
+				compatible = "lltc,ltc4287";
+				reg = <0x40>;
+				shunt-resistor-micro-ohms = <150>;
+			};
+			power-monitor at 41 {
+				compatible = "lltc,ltc4287";
+				reg = <0x41>;
+				shunt-resistor-micro-ohms = <150>;
+			};
+			power-monitor at 45 {
+				compatible = "lltc,ltc4287";
+				reg = <0x45>;
+				shunt-resistor-micro-ohms = <250>;
+			};
+		};
+	};
+};
+
 &sgpiom0 {
 	ngpios = <128>;
 	bus-frequency = <2000000>;

-- 
2.34.1