hwmon: (ctf2301) Add support for CTF2301

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

Posted by Troy Mitchell 2 weeks, 2 days ago

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

Signed-off-by: Troy Mitchell <troy.mitchell@linux.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@linux.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

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

Posted by Rob Herring 2 weeks, 2 days ago

On Tue, Sep 16, 2025 at 12:46:45PM +0800, Troy Mitchell wrote:
> Add dt-binding for the hwmon driver of Sensylink's CTF2301 chip.
> 
> Signed-off-by: Troy Mitchell <troy.mitchell@linux.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@linux.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).

Wrap at 80 chars.

> +    - 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
>

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

Posted by Troy Mitchell 2 weeks, 1 day ago

Hi Rob, Thanks for your review.

On Tue, Sep 16, 2025 at 08:52:16AM -0500, Rob Herring wrote:
> On Tue, Sep 16, 2025 at 12:46:45PM +0800, Troy Mitchell wrote:
> > Add dt-binding for the hwmon driver of Sensylink's CTF2301 chip.
> > 
> > Signed-off-by: Troy Mitchell <troy.mitchell@linux.dev>
> > ---
> >  .../bindings/hwmon/sensylink,ctf2301.yaml          | 49 ++++++++++++++++++++++
> >  1 file changed, 49 insertions(+)
> > +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).
> 
> Wrap at 80 chars.
I'll fix it in the next version.
> 
> > +    - 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
I will fix this warning in the next version (your robot reported)

                - Troy
> > +
> > +  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
> >

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

Posted by Rob Herring (Arm) 2 weeks, 2 days ago

On Tue, 16 Sep 2025 12:46:45 +0800, Troy Mitchell wrote:
> Add dt-binding for the hwmon driver of Sensylink's CTF2301 chip.
> 
> Signed-off-by: Troy Mitchell <troy.mitchell@linux.dev>
> ---
>  .../bindings/hwmon/sensylink,ctf2301.yaml          | 49 ++++++++++++++++++++++
>  1 file changed, 49 insertions(+)
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:
./Documentation/devicetree/bindings/hwmon/sensylink,ctf2301.yaml:18:111: [warning] line too long (161 > 110 characters) (line-length)

dtschema/dtc warnings/errors:
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/hwmon/sensylink,ctf2301.yaml: properties:compatible:const: ['sensylink,ctf2301'] is not of type 'integer', 'string'
	from schema $id: http://devicetree.org/meta-schemas/keywords.yaml#
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/hwmon/sensylink,ctf2301.yaml: properties:compatible:const: ['sensylink,ctf2301'] is not of type 'string'
	from schema $id: http://devicetree.org/meta-schemas/string-array.yaml#
Documentation/devicetree/bindings/hwmon/sensylink,ctf2301.example.dtb: /example-0/i2c/ctf2301@4c: failed to match any schema with compatible: ['sensylink,ctf2301']

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20250916-ctl2301-v1-2-97e7c84f2c47@linux.dev

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.