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..5f49bd9ac5e6 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-db:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      Specify an RX gain reduction to reduce antenna sensitivity with 5dB per
+      increment, with a maximum of 15dB. Supported values: [0, 5, 10, 15].
+
 required:
   - compatible
   - interrupts
@@ -95,5 +101,6 @@ examples:
             irq-status-read-quirk;
             en2-rf-quirk;
             clock-frequency = <27120000>;
+            ti,rx-gain-reduction-db = <15>;
         };
     };
-- 
2.39.2

On Thu, Jun 26, 2025 at 04:12:41PM +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..5f49bd9ac5e6 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-db:

I'll add db unit to the dtschema.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof

On 27/06/2025 09:10, Krzysztof Kozlowski wrote:
> On Thu, Jun 26, 2025 at 04:12:41PM +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..5f49bd9ac5e6 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-db:
> 
> I'll add db unit to the dtschema.
> 
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

BTW, I found your patchset only via patchwork, because Gmail flagged
your entire v3 and others as spam. You might need to check your SMTP
setup. I see DMARC failure from google in the headers:

Authentication-Results: mx.google.com;
       spf=pass (google.com: domain of
srs0=m3n1=zj=prodrive-technologies.com=paul.geurts@kernel.org designates
147........ as permitted sender)
smtp.mailfrom="SRS0=m3n1=ZJ=prodrive-technologies.com=paul.geurts@kernel.org";
       dmarc=fail (p=REJECT sp=REJECT dis=QUARANTINE)
header.from=prodrive-technologies.com


Maybe you sent via kernel.org something with different address? Actually
this looks like that - your From does not match kernel.org at all.
Rules are quite strict recently and for example you cannot use
non-kernel.org SMTP server for kernel.org accounts (see kernel users wiki).

Anyway, likely any other future patches or such patches to other people
to end up in spam as well.

Best regards,
Krzysztof