linux-kernel - [PATCH 2/3] dt-bindings: Add CTF2301 devicetree bindings

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Message-Id: <20250916-ctl2301-v1-2-97e7c84f2c47@linux.dev>
Date: Tue, 16 Sep 2025 12:46:45 +0800
From: Troy Mitchell <troy.mitchell@...ux.dev>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Jean Delvare <jdelvare@...e.com>, 
 Guenter Roeck <linux@...ck-us.net>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-hwmon@...r.kernel.org, Troy Mitchell <troy.mitchell@...ux.dev>
Subject: [PATCH 2/3] dt-bindings: Add CTF2301 devicetree bindings

Add dt-binding for the hwmon driver of Sensylink's CTF2301 chip.

Signed-off-by: Troy Mitchell <troy.mitchell@...ux.dev>
---
 .../bindings/hwmon/sensylink,ctf2301.yaml          | 49 ++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/Documentation/devicetree/bindings/hwmon/sensylink,ctf2301.yaml b/Documentation/devicetree/bindings/hwmon/sensylink,ctf2301.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..fe98f5b578320bc1b43ff88f76667990821a88f7
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/sensylink,ctf2301.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/sensylink,ctf2301.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sensylink CTF2301 system-level thermal management solution chip
+
+maintainers:
+  - Troy Mitchell <troy.mitchell@...ux.dev>
+
+allOf:
+  - $ref: hwmon-common.yaml#
+
+description: |
+  The CTF2301B is an I2C/SMBus compatible device featuring:
+    - One local temperature sensor with ±0.5°C accuracy and 0.0625°C resolution.
+    - One remote temperature sensor for external diode-connected transistors, offering ±1°C accuracy and 0.125°C resolution (temperature range: -40°C to +125°C).
+    - An integrated PWM fan controller.
+    - A 1-channel fan speed monitor (TACH input) for RPM measurement.
+
+  Datasheets:
+    https://www.sensylink.com/upload/1/net.sensylink.portal/1689557281035.pdf
+
+properties:
+  compatible:
+    const:
+      - sensylink,ctf2301
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        ctf2301@4c {
+            compatible = "sensylink,ctf2301";
+            reg = <0x4c>;
+        };
+    };

-- 
2.51.0