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@xxxxxxxxxxxxxxxxxxxxxxxxx> > --- > 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
