The veml6070 provides a configurable integration time by means of an
external resistor (Rset in the datasheet) with values between 75 and
1200 kohms.

Document rset-ohms to select the integration time.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
---
 .../bindings/iio/light/vishay,veml6075.yaml        | 27 ++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/light/vishay,veml6075.yaml b/Documentation/devicetree/bindings/iio/light/vishay,veml6075.yaml
index 96c1317541fa..dfd64c411658 100644
--- a/Documentation/devicetree/bindings/iio/light/vishay,veml6075.yaml
+++ b/Documentation/devicetree/bindings/iio/light/vishay,veml6075.yaml
@@ -22,6 +22,10 @@ properties:
   reg:
     maxItems: 1
 
+  rset-ohms:
+    description:
+      Resistor used to select the integration time.
+
   vdd-supply: true
 
 required:
@@ -29,6 +33,29 @@ required:
   - reg
   - vdd-supply
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          enum:
+            - vishay,veml6040
+            - vishay,veml6075
+    then:
+      properties:
+        rset-ohms: false
+
+  - if:
+      properties:
+        compatible:
+          enum:
+            - vishay,veml6070
+    then:
+      properties:
+        rset-ohms:
+          default: 270000
+          minimum: 75000
+          maximum: 1200000
+
 additionalProperties: false
 
 examples:

-- 
2.43.0

On Thu, Oct 24, 2024 at 10:44:48PM +0200, Javier Carrasco wrote:
> The veml6070 provides a configurable integration time by means of an
> external resistor (Rset in the datasheet) with values between 75 and
> 1200 kohms.
> 
> Document rset-ohms to select the integration time.
> 
> Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
> ---
>  .../bindings/iio/light/vishay,veml6075.yaml        | 27 ++++++++++++++++++++++
>  1 file changed, 27 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/iio/light/vishay,veml6075.yaml b/Documentation/devicetree/bindings/iio/light/vishay,veml6075.yaml
> index 96c1317541fa..dfd64c411658 100644
> --- a/Documentation/devicetree/bindings/iio/light/vishay,veml6075.yaml
> +++ b/Documentation/devicetree/bindings/iio/light/vishay,veml6075.yaml
> @@ -22,6 +22,10 @@ properties:
>    reg:
>      maxItems: 1
>  
> +  rset-ohms:
> +    description:
> +      Resistor used to select the integration time.

Widest constraints should go here. If only one device supports them,
then it even simplifies the if:then.

> +
>    vdd-supply: true
>  
>  required:
> @@ -29,6 +33,29 @@ required:
>    - reg
>    - vdd-supply
>  
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          enum:
> +            - vishay,veml6040
> +            - vishay,veml6075
> +    then:
> +      properties:
> +        rset-ohms: false
> +
> +  - if:
> +      properties:
> +        compatible:
> +          enum:
> +            - vishay,veml6070
> +    then:
> +      properties:
> +        rset-ohms:
> +          default: 270000
> +          minimum: 75000
> +          maximum: 1200000

Move these three to top-level and then you can drop this if:.

Best regards,
Krzysztof