On 20/11/2023 16:10, Rasmus Villemoes wrote: > Some boards are capable of both rs232 and rs485, and control which > external terminals are active via a gpio-controlled mux. Allow > describing that gpio in DT so that the kernel can transparently handle > the proper setting when the uart is switched between rs232 and rs485 > modes. > > Signed-off-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx> > --- > Documentation/devicetree/bindings/serial/rs485.yaml | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/Documentation/devicetree/bindings/serial/rs485.yaml b/Documentation/devicetree/bindings/serial/rs485.yaml > index 9418fd66a8e9..e8136c7d22ed 100644 > --- a/Documentation/devicetree/bindings/serial/rs485.yaml > +++ b/Documentation/devicetree/bindings/serial/rs485.yaml > @@ -61,6 +61,11 @@ properties: > the active state enables RX during TX. > maxItems: 1 > > + rs485-mux-gpios: > + description: GPIO pin to control muxing of the SOC signals to the RS485 > + transceiver. > + maxItems: 1 Aren't you duplicating https://lore.kernel.org/all/3Nk.ZZrp.5w3Yn0Ecy5C.1bMzDp@xxxxxxxxx/ ? Anyway, similar comments: this does not look like generic RS485 property. Are you saying that standard defines such GPIO? Best regards, Krzysztof
