linux-kernel - [PATCH 2/3] arm64: zynqmp: Expose AMS to userspace as HWMON

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Message-Id: <20240812215129.3599832-3-sean.anderson@linux.dev>
Date: Mon, 12 Aug 2024 17:51:27 -0400
From: Sean Anderson <sean.anderson@...ux.dev>
To: Michal Simek <michal.simek@....com>,
	linux-arm-kernel@...ts.infradead.org
Cc: Rob Herring <robh@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	Sean Anderson <sean.anderson@...ux.dev>
Subject: [PATCH 2/3] arm64: zynqmp: Expose AMS to userspace as HWMON

Expose the AMS to userspace, allowing monitoring of internal voltages
and temperatures. For compatibility, we keep the node name the same as
on the SM-K26, and we keep the ZCU100 Rev C. around (since it is named
differently).

Signed-off-by: Sean Anderson <sean.anderson@...ux.dev>
---

 arch/arm64/boot/dts/xilinx/zynqmp-sm-k26-revA.dts | 14 --------------
 arch/arm64/boot/dts/xilinx/zynqmp.dtsi            | 14 ++++++++++++++
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-sm-k26-revA.dts b/arch/arm64/boot/dts/xilinx/zynqmp-sm-k26-revA.dts
index 4e0e7fdf29ca..bfa7ea6b9224 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-sm-k26-revA.dts
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-sm-k26-revA.dts
@@ -90,20 +90,6 @@ ds36-led {
 		};
 	};
 
-	ams {
-		compatible = "iio-hwmon";
-		io-channels = <&xilinx_ams 0>, <&xilinx_ams 1>, <&xilinx_ams 2>,
-			<&xilinx_ams 3>, <&xilinx_ams 4>, <&xilinx_ams 5>,
-			<&xilinx_ams 6>, <&xilinx_ams 7>, <&xilinx_ams 8>,
-			<&xilinx_ams 9>, <&xilinx_ams 10>, <&xilinx_ams 11>,
-			<&xilinx_ams 12>, <&xilinx_ams 13>, <&xilinx_ams 14>,
-			<&xilinx_ams 15>, <&xilinx_ams 16>, <&xilinx_ams 17>,
-			<&xilinx_ams 18>, <&xilinx_ams 19>, <&xilinx_ams 20>,
-			<&xilinx_ams 21>, <&xilinx_ams 22>, <&xilinx_ams 23>,
-			<&xilinx_ams 24>, <&xilinx_ams 25>, <&xilinx_ams 26>,
-			<&xilinx_ams 27>, <&xilinx_ams 28>, <&xilinx_ams 29>;
-	};
-
 	pwm-fan {
 		compatible = "pwm-fan";
 		status = "okay";
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
index 256cff250717..21c1adbaf35f 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
+++ b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
@@ -392,6 +392,20 @@ r5f@1 {
 		};
 	};
 
+	ams {
+		compatible = "iio-hwmon";
+		io-channels = <&xilinx_ams 0>, <&xilinx_ams 1>, <&xilinx_ams 2>,
+			<&xilinx_ams 3>, <&xilinx_ams 4>, <&xilinx_ams 5>,
+			<&xilinx_ams 6>, <&xilinx_ams 7>, <&xilinx_ams 8>,
+			<&xilinx_ams 9>, <&xilinx_ams 10>, <&xilinx_ams 11>,
+			<&xilinx_ams 12>, <&xilinx_ams 13>, <&xilinx_ams 14>,
+			<&xilinx_ams 15>, <&xilinx_ams 16>, <&xilinx_ams 17>,
+			<&xilinx_ams 18>, <&xilinx_ams 19>, <&xilinx_ams 20>,
+			<&xilinx_ams 21>, <&xilinx_ams 22>, <&xilinx_ams 23>,
+			<&xilinx_ams 24>, <&xilinx_ams 25>, <&xilinx_ams 26>,
+			<&xilinx_ams 27>, <&xilinx_ams 28>, <&xilinx_ams 29>;
+	};
+
 	amba: axi {
 		compatible = "simple-bus";
 		bootph-all;
-- 
2.35.1.1320.gc452695387.dirty