On Wed, Mar 02, 2022 at 11:56:03AM +0200, Ilpo Järvinen wrote: > Add RS485 enable & line polarity properties. > > Cc: Rob Herring <robh+dt@xxxxxxxxxx> > Cc: devicetree@xxxxxxxxxxxxxxx > Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx> > --- > .../bindings/serial/snps-dw-apb-uart.yaml | 17 +++++++++++++++++ > 1 file changed, 17 insertions(+) > > diff --git a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml > index 12137fe80acf..8d440afabb1f 100644 > --- a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml > +++ b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml > @@ -103,6 +103,23 @@ properties: > register. Define this if your serial port does not use this pin. > type: boolean > > + snps,rs485-interface-en: > + description: Use true RS-485 DE and RE signals (in contrast to RS-485 > + emulation using RTS). Requires IP version 4 or above. > + type: boolean > + > + snps,de-active-high: > + description: Defines the polarity of driver enable (DE_EN) signal. > + Meaningful only with snps,rs485-interface-en. True indicates active > + high. > + type: boolean > + > + snps,re-active-high: > + description: Defines the polarity of receiver enable (RE_EN) signal. > + Meaningful only with snps,rs485-interface-en. True indicates active > + high. > + type: boolean Seems plausible that other rs485 implementations could have varying polarities too. IOW, should be common properties. > + > required: > - compatible > - reg > -- > 2.30.2 >
