Re: [PATCH] NFC: trf7970a: Ignore antenna noise when checking for RF field

[Krzysztof Kozlowski]

On 22/04/2026 12:09, Paul Geurts wrote:
> The main channel Received Signal Strength Indicator (RSSI) measurement
> is used to determine whether an RF field is present or not. RSSI != 0
> is interpreted as an RF Field is present. This does not take RF noise
> and measurement inaccuracy into account, and results in false positives
> in the field.
> 
> Define a noise level and make sure the RF field is only interpreted as
> present when the RSSI is above the noise level.
> 
> Fixes: 851ee3cbf850 ("NFC: trf7970a: Don't turn on RF if there is already an RF field")
> Signed-off-by: Paul Geurts <paul.geurts@xxxxxxxxxxxxxxxxxxxxxxxxx>
> ---
>  drivers/nfc/trf7970a.c | 3 ++-

Looks reasonable so a poor man's review:

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

Best regards,
Krzysztof