Re: [PATCH v2 2/4] dt-bindings: iio: ti,tmp117: add binding for the TMP116

[Jonathan Cameron <jic23@kernel.org>]

On Wed, 21 Dec 2022 10:27:59 +0100
Marco Felsch <m.felsch@pengutronix.de> wrote:

> The TMP116 is the predecessor of the TMP117.
> 
> Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
I'm not sure this is introducing a valid fallback. The driver changes
imply some things the tmp117 driver supports, that this device
does not. A fallback compatible would mean that a new DT
with an old kernel would load the tmp117 against a tmp116 and
expect it to fully work.

An example is calibbias which you've dropped from the channels
array entry.

Jonathan


> ---
> v2:
> - drop items from single enum
> 
>  .../bindings/iio/temperature/ti,tmp117.yaml        | 14 ++++++++++----
>  1 file changed, 10 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/iio/temperature/ti,tmp117.yaml b/Documentation/devicetree/bindings/iio/temperature/ti,tmp117.yaml
> index 8d1ec4d39b28..9b78357d6a79 100644
> --- a/Documentation/devicetree/bindings/iio/temperature/ti,tmp117.yaml
> +++ b/Documentation/devicetree/bindings/iio/temperature/ti,tmp117.yaml
> @@ -7,8 +7,9 @@ $schema: "http://devicetree.org/meta-schemas/core.yaml#"
>  title: "TI TMP117 - Digital temperature sensor with integrated NV memory"
>  
>  description: |
> -    TI TMP117 - Digital temperature sensor with integrated NV memory that supports
> -    I2C interface.
> +    TI TMP116/117 - Digital temperature sensor with integrated NV memory that
> +    supports I2C interface.
> +      https://www.ti.com/lit/gpn/tmp116
>        https://www.ti.com/lit/gpn/tmp117
>  
>  maintainers:
> @@ -16,8 +17,13 @@ maintainers:
>  
>  properties:
>    compatible:
> -    enum:
> -      - ti,tmp117
> +    oneOf:
> +      - enum:
> +          - ti,tmp117
> +      - items:
> +          - enum:
> +              - ti,tmp116
> +          - const: ti,tmp117
>  
>    reg:
>      maxItems: 1