Re: [PATCH v3 1/2] dt-bindings: hwmon: Add Eswin EIC7700 PVT sensor

Huan He
2026-04-27T07:26:17Z

> From: Huan He <hehuan1@eswincomputing.com>
>
> Add device tree binding documentation for ESWIN EIC7700 Process, Voltage
> and Temperature sensor.
>
> The EIC7700 SoC integrates two PVT instances for monitoring SoC and DDR
> power domains respectively.
>
> Signed-off-by: Yulin Lu <luyulin@eswincomputing.com>
> Signed-off-by: Huan He <hehuan1@eswincomputing.com>
> Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
> ---
> .../bindings/hwmon/eswin,eic7700-pvt.yaml | 65 +++++++++++++++++++
> 1 file changed, 65 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/hwmon/eswin,eic7700-pvt.yaml
>
> diff --git a/Documentation/devicetree/bindings/hwmon/eswin,eic7700-pvt.yaml b/Documentation/devicetree/bindings/hwmon/eswin,eic7700-pvt.yaml
> new file mode 100644
> index 000000000000..366dce3c6d43
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/eswin,eic7700-pvt.yaml
> @@ -0,0 +1,65 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/hwmon/eswin,eic7700-pvt.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ESWIN EIC7700 PVT Sensor
> +
> +maintainers:
> + - Yulin Lu <luyulin@eswincomputing.com>
> + - Huan He <hehuan1@eswincomputing.com>
> +
> +description:
> + ESWIN EIC7700 SoC integrates embedded process, voltage and temperature
> + sensors to monitor the internal SoC environment. The system includes two
> + PVT sensor instances. The PVT0 monitors the main SoC power domain. The
> + PVT1 sensor monitors the DDR core power domain.
> +
> +allOf:
> + - $ref: /schemas/hwmon/hwmon-common.yaml#
> +
> +properties:
> + compatible:
> + const: eswin,eic7700-pvt
> +
> + reg:
> + maxItems: 1
> +
> + clocks:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + label: true

Hi Conor,

The label property is currently declared as 'label: true' without any
value constraints. However, the driver expects specific label values (pvt0
or pvt1). Is it ok to update the DT binding schema to constrain the label
property to an enum:

-  label: true
+  label:
+    enum:
+      - pvt0
+      - pvt1

Best regards,
Huan He

> +
> + resets:
> + maxItems: 1
> +
> + '#thermal-sensor-cells':
> + const: 0
> +
> +required:
> + - compatible
> + - reg
> + - clocks
> + - interrupts
> + - label
> + - resets
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + pvt@50b00000 {
> + compatible = "eswin,eic7700-pvt";
> + reg = <0x50b00000 0x10000>;
> + clocks = <&clocks 244>;
> + interrupts = <349>;
> + interrupt-parent = <&plic>;
> + label = "pvt0";
> + resets = <&reset 111>;
> + #thermal-sensor-cells = <0>;
> + };
> +...
> --
> 2.25.1