linux-kernel - [PATCH v5 1/2] dt-bindings: iio: adc: add NCT7201 ADCs

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Message-Id: <20250409012351.2543450-2-j2anfernee@gmail.com>
Date: Wed,  9 Apr 2025 09:23:50 +0800
From: Eason Yang <j2anfernee@...il.com>
To: jic23@...nel.org,
	lars@...afoo.de,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	dlechner@...libre.com,
	nuno.sa@...log.com,
	javier.carrasco.cruz@...il.com,
	gstols@...libre.com,
	tgamblin@...libre.com,
	alisadariana@...il.com,
	antoniu.miclaus@...log.com,
	eblanc@...libre.com,
	andriy.shevchenko@...ux.intel.com,
	jstephan@...libre.com,
	matteomartelli3@...il.com,
	angelogioacchino.delregno@...labora.com,
	herve.codina@...tlin.com,
	marcelo.schmitt@...log.com,
	chanh@...amperecomputing.com,
	KWLIU@...oton.com,
	yhyang2@...oton.com
Cc: linux-iio@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Eason Yang <j2anfernee@...il.com>
Subject: [PATCH v5 1/2] dt-bindings: iio: adc: add NCT7201 ADCs

Add a binding specification for the Nuvoton NCT7201/NCT7202 up to 12-bit
ADCs with I2C interface.

Signed-off-by: Eason Yang <j2anfernee@...il.com>
---
 .../bindings/iio/adc/nuvoton,nct7201.yaml     | 71 +++++++++++++++++++
 MAINTAINERS                                   |  6 ++
 2 files changed, 77 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/nuvoton,nct7201.yaml

diff --git a/Documentation/devicetree/bindings/iio/adc/nuvoton,nct7201.yaml b/Documentation/devicetree/bindings/iio/adc/nuvoton,nct7201.yaml
new file mode 100644
index 000000000000..773e0cfd9f36
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/nuvoton,nct7201.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/nuvoton,nct7201.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton nct7201 and similar ADCs
+
+maintainers:
+  - Eason Yang <j2anfernee@...il.com>
+
+description: |
+  The NCT7201/NCT7202 is a Nuvoton Hardware Monitor IC, contains up to 12
+  voltage monitoring channels, with SMBus interface, and up to 4 sets SMBus
+  address selection by ADDR connection. It also provides ALERT# signal for
+  event notification and reset input RSTIN# to recover it from a fault
+  condition.
+
+  NCT7201 contains 8 voltage monitor inputs (VIN1~VIN8).
+  NCT7202 contains 12 voltage monitor inputs (VIN1~VIN12).
+
+properties:
+  compatible:
+    enum:
+      - nuvoton,nct7201
+      - nuvoton,nct7202
+
+  reg:
+    maxItems: 1
+
+  vdd-supply:
+    description:
+      A 3.3V to supply that powers the chip.
+
+  vref-supply:
+    description:
+      The regulator supply for the ADC reference voltage.
+
+  interrupts:
+    maxItems: 1
+
+  reset-gpios:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@1d {
+            compatible = "nuvoton,nct7202";
+            reg = <0x1d>;
+            vdd-supply = <&vdd>;
+            vref-supply = <&vref>;
+            interrupt-parent = <&gpio3>;
+            interrupts = <30 IRQ_TYPE_LEVEL_LOW>;
+            reset-gpios = <&gpio3 28 GPIO_ACTIVE_LOW>;
+        };
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 96b827049501..f9ec68d4d8b4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -17302,6 +17302,12 @@ F:	drivers/nubus/
 F:	include/linux/nubus.h
 F:	include/uapi/linux/nubus.h
 
+NUVOTON NCT7201 IIO DRIVER
+M:	Eason Yang <j2anfernee@...il.com>
+L:	linux-iio@...r.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/iio/adc/nuvoton,nct7201.yaml
+
 NVIDIA (rivafb and nvidiafb) FRAMEBUFFER DRIVER
 M:	Antonino Daplas <adaplas@...il.com>
 L:	linux-fbdev@...r.kernel.org
-- 
2.34.1