From: Muhammad Amirul Asyraf Mohamad Jamian <muhammad.amirul.asyraf.mohamad.jamian@altera.com>

The Stratix 10 SoCFPGA platform includes hardware monitoring capabilities
that require proper device tree description.

Currently, the Stratix 10 device tree lacks an hwmon node, preventing the
kernel from binding the corresponding hwmon driver and accessing sensor
data.

This hwmon node with the compatible string "altera,socfpga-hwmon" ensures
the hardware monitoring subsystem can be initialized correctly, enabling
accurate voltage and temperature monitoring.

Signed-off-by: Ang Tien Sung <tien.sung.ang@altera.com>
Signed-off-by: Khairul Anuar Romli <khairul.anuar.romli@altera.com>
Signed-off-by: Muhammad Amirul Asyraf Mohamad Jamian <muhammad.amirul.asyraf.mohamad.jamian@altera.com>
---
 .../boot/dts/altera/socfpga_stratix10.dtsi    |  4 +++
 .../dts/altera/socfpga_stratix10_socdk.dts    | 31 +++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi b/arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi
index 657e986e5dba..73eead7ffdbb 100644
--- a/arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi
+++ b/arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi
@@ -78,6 +78,10 @@ svc {
 			fpga_mgr: fpga-mgr {
 				compatible = "intel,stratix10-soc-fpga-mgr";
 			};
+
+			temp_volt: hwmon {
+				compatible = "altr,socfpga-hwmon";
+			};
 		};
 	};
 
diff --git a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
index 58f776e411fc..63309001f1c5 100644
--- a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
+++ b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
@@ -197,3 +197,34 @@ root: partition@4200000 {
 		};
 	};
 };
+
+&temp_volt {
+	voltage {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		input@2 {
+			label = "0.8V VCC";
+			reg = <2>;
+		};
+
+		input@3 {
+			label = "1.8V VCCIO_SDM";
+			reg = <3>;
+		};
+
+		input@6 {
+			label = "0.9V VCCERAM";
+			reg = <6>;
+		};
+	};
+
+	temperature {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		input@0 {
+			label = "Main Die SDM";
+			reg = <0x0>;
+		};
+	};
+};
-- 
2.43.7