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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: kJ3op4OvhYBZgeC3wuJAhcWY906CYIZjmfXlzn5MaEVgjGDGXnfG/nMshq5s8+eNtnvNUHqEPG7ji9Auq80Pbva4djMS4g4GFBk5VoS7wKBLsDqKOlAgxbMgvAhxY8TOGnrRKkF6OD0R8N9sZgP6hvqxyu9wsGLgRK/zDMPx1rkmXLyTRpZ1iZjVE4tTLzbpH7pHnlqpw1T1/NBW32U/b/YbFqpX6hHYfV9GsNXq+6IgsRJdtF4AS0v1Ul18Y+O3wW3fu4szTnCCrjuTSymDA7W247r6UPna6fyXXS4uIj5mQLoruy8I+14gwJwXbm4KpAFmemqoPTqNbvuBrKE1cAf2etCDr81loAg8n3Z1n6y33d9tbb+2/ZLe0nFSRGrCS6AKyTZ4fBYUVZnQddADzbki43HMJiXyom3nAFlgXTYdFUIdQAd+m5X6e8qcSvX1 X-OriginatorOrg: amdcloud.onmicrosoft.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Oct 2026 13:41:48.6266 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 14906b39-f1a1-4209-dd43-08df35c26193 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: PH3PEPF0005961B.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB7554 From: Peter Shen 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 --- .../aspeed/aspeed-bmc-facebook-anacapa-evt2.dtsi | 42 ++++++++++++++++++++++ 1 file changed, 42 insertions(+) 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>; + }; }; }; }; -- 2.34.1