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charset="utf-8" Define I2C alias ports from I2C Switch 0x70 at BMC I2C5. Add the tmp421 sensors via the I2C alias ports as OCP device temperature sensors. Signed-off-by: Chanh Nguyen --- .../dts/aspeed/aspeed-bmc-ampere-mtjade.dts | 16 +++++++++++ .../aspeed/aspeed-bmc-ampere-mtmitchell.dts | 28 +++++++++++++++++++ 2 files changed, 44 insertions(+) diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtjade.dts b/arch/a= rm/boot/dts/aspeed/aspeed-bmc-ampere-mtjade.dts index 8ab5f301f926..8102f41d1d15 100644 --- a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtjade.dts +++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtjade.dts @@ -49,6 +49,11 @@ aliases { */ i2c80 =3D &nvme_m2_0; i2c81 =3D &nvme_m2_1; + + /* + * i2c bus 82 assigned to OCP slot + */ + i2c82 =3D &ocpslot; }; =20 chosen { @@ -420,6 +425,17 @@ i2c-mux@70 { reg =3D <0x70>; i2c-mux-idle-disconnect; =20 + ocpslot: i2c@0 { + #address-cells =3D <1>; + #size-cells =3D <0>; + reg =3D <0x0>; + + ocpslot_temp: temperature-sensor@1f { + compatible =3D "ti,tmp421"; + reg =3D <0x1f>; + }; + }; + nvmeslot_0_7: i2c@3 { #address-cells =3D <1>; #size-cells =3D <0>; diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts b/ar= ch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts index 3c8925034a8c..3a97e88278d5 100644 --- a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts +++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts @@ -15,6 +15,12 @@ aliases { serial7 =3D &uart8; serial8 =3D &uart9; =20 + /* + * i2c bus 30-31 assigned to OCP slot 0-1 + */ + i2c30 =3D &ocpslot_0; + i2c31 =3D &ocpslot_1; + /* * I2C NVMe alias port */ @@ -515,6 +521,28 @@ i2c-mux@70 { #size-cells =3D <0>; reg =3D <0x70>; i2c-mux-idle-disconnect; + + ocpslot_0: i2c@0 { + #address-cells =3D <1>; + #size-cells =3D <0>; + reg =3D <0x0>; + + ocpslot_0_temp: temperature-sensor@1f { + compatible =3D "ti,tmp421"; + reg =3D <0x1f>; + }; + }; + + ocpslot_1: i2c@1 { + #address-cells =3D <1>; + #size-cells =3D <0>; + reg =3D <0x1>; + + ocpslot_1_temp: temperature-sensor@1f { + compatible =3D "ti,tmp421"; + reg =3D <0x1f>; + }; + }; }; }; =20 --=20 2.43.0 From nobody Sun Feb 8 06:00:06 2026 Received: from BN1PR04CU002.outbound.protection.outlook.com (mail-eastus2azon11020119.outbound.protection.outlook.com [52.101.56.119]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0EEE4183CBB; Thu, 1 Aug 2024 09:13:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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charset="utf-8" Add the I2C alias ports to read temperature sensors via channels of the I2C muxes. Signed-off-by: Chanh Nguyen --- arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts b/ar= ch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts index 3a97e88278d5..1679911e4fd8 100644 --- a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts +++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts @@ -15,6 +15,14 @@ aliases { serial7 =3D &uart8; serial8 =3D &uart9; =20 + /* + * I2C temperature alias port + */ + i2c20 =3D &i2c4_bus70_chn0; + i2c21 =3D &i2c4_bus70_chn1; + i2c22 =3D &i2c4_bus70_chn2; + i2c23 =3D &i2c4_bus70_chn3; + /* * i2c bus 30-31 assigned to OCP slot 0-1 */ --=20 2.43.0 From nobody Sun Feb 8 06:00:06 2026 Received: from BN1PR04CU002.outbound.protection.outlook.com (mail-eastus2azon11020099.outbound.protection.outlook.com [52.101.56.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C31D1183CBB; 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charset="utf-8" Define the I2C alias ports for the riser cards. Besides that, it also adds the i2c muxes to switch to the i2c alias ports. Signed-off-by: Chanh Nguyen --- .../aspeed/aspeed-bmc-ampere-mtmitchell.dts | 52 +++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts b/ar= ch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts index 1679911e4fd8..0703b77e438b 100644 --- a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts +++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts @@ -29,6 +29,18 @@ aliases { i2c30 =3D &ocpslot_0; i2c31 =3D &ocpslot_1; =20 + /* + * i2c bus 32-33 assigned to Riser slot 0-1 + */ + i2c32 =3D &i2c_riser0; + i2c33 =3D &i2c_riser1; + + /* + * i2c bus 38-39 assigned to FRU on Riser slot 0-1 + */ + i2c38 =3D &i2c_riser0_chn_0; + i2c39 =3D &i2c_riser1_chn_0; + /* * I2C NVMe alias port */ @@ -551,6 +563,46 @@ ocpslot_1_temp: temperature-sensor@1f { reg =3D <0x1f>; }; }; + + i2c_riser0: i2c@2 { + #address-cells =3D <1>; + #size-cells =3D <0>; + reg =3D <0x2>; + + i2c-mux@72 { + compatible =3D "nxp,pca9546"; + #address-cells =3D <1>; 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charset="utf-8" Enable the BMC I2C10. Enable the BMC I2C15 and add the GPIO Expander as a child node. Signed-off-by: Chanh Nguyen --- .../aspeed/aspeed-bmc-ampere-mtmitchell.dts | 23 +++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts b/ar= ch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts index 0703b77e438b..119e82637023 100644 --- a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts +++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts @@ -878,6 +878,10 @@ nvme_m2_1: i2c@1 { }; }; =20 +&i2c10 { + status =3D "okay"; +}; + &i2c11 { status =3D "okay"; ssif-bmc@10 { @@ -900,6 +904,25 @@ bmc_ast2600_cpu: temperature-sensor@35 { }; }; =20 +&i2c15 { + status =3D "okay"; + gpio_expander1: gpio-expander@22 { + compatible =3D "nxp,pca9535"; + reg =3D <0x22>; + gpio-controller; + #gpio-cells =3D <2>; + gpio-line-names =3D + "fan-fault","psu-fault", + "","", + "","", + "","", + "","", + "","", + "","", + "",""; + }; +}; + &adc0 { status =3D "okay"; =20 --=20 2.43.0 From nobody Sun Feb 8 06:00:06 2026 Received: from SJ2PR03CU001.outbound.protection.outlook.com (mail-westusazon11022120.outbound.protection.outlook.com [52.101.43.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6CFEB18453B; 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charset="utf-8" Add LED nodes as the gpio-leds devices. They are led-bmc-ready, led-sw-heartbeat, led-identify, led-fault, led-fan-fault, led-psu-fault Signed-off-by: Chanh Nguyen --- .../aspeed/aspeed-bmc-ampere-mtmitchell.dts | 31 +++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts b/ar= ch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts index 119e82637023..093b746c010f 100644 --- a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts +++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts @@ -113,6 +113,37 @@ vga_memory: region@bf000000 { }; }; =20 + leds { + compatible =3D "gpio-leds"; + /* + * Use gpio-leds to configure GPIOW5 (bmc-ready) pin to be reseted when + * watchdog timeout. + */ + led-bmc-ready { + gpios =3D <&gpio0 ASPEED_GPIO(W, 5) (GPIO_ACTIVE_HIGH | GPIO_TRANSITORY= )>; + }; + + led-sw-heartbeat { + gpios =3D <&gpio0 ASPEED_GPIO(N, 3) GPIO_ACTIVE_HIGH>; + }; + + led-identify { + gpios =3D <&gpio0 ASPEED_GPIO(S, 3) GPIO_ACTIVE_HIGH>; + }; 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charset="utf-8" Add the MAX31790 nodes as fan I2C controllers. Signed-off-by: Chanh Nguyen --- .../boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts b/ar= ch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts index 093b746c010f..b3e7a306901b 100644 --- a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts +++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts @@ -672,6 +672,16 @@ bmc-ocp0-en-hog { line-name =3D "bmc-ocp0-en-n"; }; }; + + fan-controller0@20 { + compatible =3D "maxim,max31790"; + reg =3D <0x20>; + }; + + fan-controller1@2f { + compatible =3D "maxim,max31790"; + reg =3D <0x2f>; + }; }; =20 &i2c9 { --=20 2.43.0