[PATCH v5 09/15] ARM: dts: aspeed: anacapa: evt2: Add shunt resistor values for HSC monitors
Colin Huang via B4 Relay <[email protected]>
| Newsgroups | org.ozlabs.lists.linux-aspeed,org.infradead.lists.linux-arm-kernel,org.kernel.feeds.b4-sent,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-kernel |
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| Message-ID | <20260813-anacapa-devlop-phase-devicetree-v5-9-c7058f63dc67@gmail.com> |
From: Colin Huang <[email protected]> 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 <[email protected]> --- .../aspeed/aspeed-bmc-facebook-anacapa-evt2.dts | 35 ++++++++++++++++++++++ 1 file changed, 35 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 703284721224..f913fa3f622d 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 @@ -31,6 +31,26 @@ / { &i2c8 { i2c-mux@72 { i2c8mux0ch0: i2c@0 { + 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>; + }; gpio@24 { gpio-line-names = "RPDB_EAM2_PRSNT_MOS_N_R", "RPDB_EAM3_PRSNT_MOS_N_R", @@ -45,6 +65,21 @@ gpio@24 { }; }; i2c8mux0ch1: i2c@1 { + 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>; + }; gpio@24 { gpio-line-names = "LPDB_P50V_FAN0_R2_PG","LPDB_P50V_FAN1_R2_PG", -- 2.34.1