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Wed, 30 Sep 2026 01:13:58 -0500 From: Colin Huang Date: Wed, 30 Sep 2026 14:10:16 +0800 Subject: [PATCH v9 08/15] ARM: dts: aspeed: anacapa: evt2: Add shunt resistor values for HSC monitors Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-ID: <20260930-anacapa-devlop-phase-devicetree-v9-8-f08aa0d7182d@gmail.com> References: <20260930-anacapa-devlop-phase-devicetree-v9-0-f08aa0d7182d@gmail.com> In-Reply-To: <20260930-anacapa-devlop-phase-devicetree-v9-0-f08aa0d7182d@gmail.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Joel Stanley , "Andrew Jeffery" , Ryan Chen , Billy Tsai CC: , , , , , Colin Huang , Peter Shen X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1790748641; l=2046; i=u8813345@gmail.com; s=20260202; h=from:subject:message-id; bh=2hNvv3dzcGY7YC5SlE8BBJWHSA7m9aG/DD9F7WuX2b0=; b=lbBMz0G96RyQQ6PR5pBFPxt07NaS8H0BC2tKWbBfbkSLY7E0k2+d/qKAJBRjxklgHVO+xCrla /2x+jjC6jSIAb8L4XrvhliUykkElhGakcZhjeojsJAVB5RRwoIr7eDQ X-Developer-Key: i=u8813345@gmail.com; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: A2iYGfEGrX7Ezo/307+t9Bpy/OvnhkFSjNi+ooIRn2hqQ7agKbELXmWqp08+3xFLe2V2BKgO5kO9bdn2XqnVDyDz90GZQEYJwZrWRmEFKPjHAA5esJaQGyK8zoLOMkb17rzScGUGDrcZMdF5thaRoWr+TgGPK+jGJxKUlqN7EZnY8eBWmqvgr5zd9pMg6MMaHhFUZTwffF38LloQZWtM6HacjhdvDNlVIo4Z647F3jbwl3UR9MwpnkOupdzJs9MKCCE55noQ/RYdB9Q+5gW/ch4D7NLOL+sWWsalVQiYCNAZlOAhrhlf53k4Wsa7oMjTKphXHuq8ELafwOzkyyLqJlJYUaOwNP//ISm1GHKBZ+ploPHON4g0oCvSQ+jcXeFFRB9dxk5xiL3sTSxqcNtFV2GcxL9WyubmAQPXoYdxF12l1/FzA7OaANmf2q3y3Rl2 X-OriginatorOrg: amdcloud.onmicrosoft.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Sep 2026 06:14:04.2272 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7c06d956-4517-4e5b-a142-08df1eba0728 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=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF0000A7FF.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS6PR12MB422600 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