On Tue, Jun 24, 2025 at 02:42:46PM +0200, Paul Geurts wrote:
> Add option to reduce the RX antenna gain to be able to reduce the
> sensitivity.
>
> Signed-off-by: Paul Geurts <paul.geurts@prodrive-technologies.com>
> ---
> Documentation/devicetree/bindings/net/nfc/ti,trf7970a.yaml | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/net/nfc/ti,trf7970a.yaml b/Documentation/devicetree/bindings/net/nfc/ti,trf7970a.yaml
> index d0332eb76ad2..066a7abc41e0 100644
> --- a/Documentation/devicetree/bindings/net/nfc/ti,trf7970a.yaml
> +++ b/Documentation/devicetree/bindings/net/nfc/ti,trf7970a.yaml
> @@ -55,6 +55,12 @@ properties:
> description: |
> Regulator for supply voltage to VIN pin
>
> + ti,rx-gain-reduction:
You should include the units, "ti,rx-gain-reduction-db"
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: |
> + Specify a RX gain reduction to reduce antenna sensitivity with 5dB per
> + increment, with a maximum of 15dB.
Given that description i think you can provide a list of values, [0,
5, 10, 15] and the tools will validate values in .dts files.
> +
> required:
> - compatible
> - interrupts
> @@ -95,5 +101,6 @@ examples:
> irq-status-read-quirk;
> en2-rf-quirk;
> clock-frequency = <27120000>;
> + ti,rx-gain-reduction = <3>;
Err, how does 3 fit into 5dB increments?
Andrew