linux-kernel - [PATCH] ARM: dts: aspeed: mtjade, mtmitchell: Add OCP device temperature sensor

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Message-Id: <20230218171002.8725-1-chanh@os.amperecomputing.com>
Date:   Sun, 19 Feb 2023 00:10:02 +0700
From:   Chanh Nguyen <chanh@...amperecomputing.com>
To:     OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Cc:     Chanh Nguyen <chanh@...amperecomputing.com>
Subject: [PATCH] ARM: dts: aspeed: mtjade, mtmitchell: Add OCP device temperature sensor

Define an I2C alias port from I2C Switch 0x70 at I2C5.
Add the OCP device temperature sensor via I2C alias port
as a tmp421 sensor.

Signed-off-by: Chanh Nguyen <chanh@...amperecomputing.com>
---
 .../arm/boot/dts/aspeed-bmc-ampere-mtjade.dts | 16 ++++++++++
 .../boot/dts/aspeed-bmc-ampere-mtmitchell.dts | 29 +++++++++++++++++++
 2 files changed, 45 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed-bmc-ampere-mtjade.dts b/arch/arm/boot/dts/aspeed-bmc-ampere-mtjade.dts
index 0a51d2e32fab..b93339ed61c0 100644
--- a/arch/arm/boot/dts/aspeed-bmc-ampere-mtjade.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-ampere-mtjade.dts
@@ -49,6 +49,11 @@
 		 */
 		i2c80 = &nvme_m2_0;
 		i2c81 = &nvme_m2_1;
+
+		/*
+		 *  i2c bus 82 assigned to OCP slot
+		 */
+		i2c82 = &ocpslot;
 	};
 
 	chosen {
@@ -420,6 +425,17 @@
 		reg = <0x70>;
 		i2c-mux-idle-disconnect;
 
+		ocpslot: i2c@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x0>;
+
+			ocp_temp: temperature-sensor@1f {
+				compatible = "ti,tmp421";
+				reg = <0x1f>;
+			};
+		};
+
 		nvmeslot_0_7: i2c@3 {
 			#address-cells = <1>;
 			#size-cells = <0>;
diff --git a/arch/arm/boot/dts/aspeed-bmc-ampere-mtmitchell.dts b/arch/arm/boot/dts/aspeed-bmc-ampere-mtmitchell.dts
index 4b91600eaf62..c832b8ae5999 100644
--- a/arch/arm/boot/dts/aspeed-bmc-ampere-mtmitchell.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-ampere-mtmitchell.dts
@@ -10,6 +10,14 @@
 	model = "Ampere Mt.Mitchell BMC";
 	compatible = "ampere,mtmitchell-bmc", "aspeed,ast2600";
 
+	aliases {
+		/*
+		 *  i2c bus 30-31 assigned to OCP slot 0-1
+		 */
+		i2c30 = &ocpslot_0;
+		i2c31 = &ocpslot_1;
+	};
+
 	chosen {
 		stdout-path = &uart5;
 	};
@@ -424,6 +432,27 @@
 		#size-cells = <0>;
 		reg = <0x70>;
 		i2c-mux-idle-disconnect;
+
+		ocpslot_0: i2c@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x0>;
+
+			ocpslot_0_temp: temperature-sensor@1f {
+				compatible = "ti,tmp421";
+				reg = <0x1f>;
+			};
+		};
+		ocpslot_1: i2c@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x1>;
+
+			ocpslot_1_temp: temperature-sensor@1f {
+				compatible = "ti,tmp421";
+				reg = <0x1f>;
+			};
+		};
 	};
 };
 
-- 
2.17.1