On Thu, Jun 26, 2025 at 04:12:42PM +0200, Paul Geurts wrote: > The TRF7970a device is sensitive to RF disturbances, which can make it > hard to pass some EMC immunity tests. By reducing the RX antenna gain, > the device becomes less sensitive to EMC disturbances, as a trade-off > against antenna performance. > > Add a device tree option to select RX gain reduction to improve EMC > performance. > > Selecting a communication standard in the ISO control register resets > the RX antenna gain settings. Therefore set the RX gain reduction > everytime the ISO control register changes, when the option is used. > > Signed-off-by: Paul Geurts <paul.geurts@xxxxxxxxxxxxxxxxxxxxxxxxx> > --- > drivers/nfc/trf7970a.c | 91 +++++++++++++++++++++++++++++++++++++----- > 1 file changed, 80 insertions(+), 11 deletions(-) Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> Best regards, Krzysztof
