| Message ID | 20240126-dev-rx-enable-v5-1-5d934eda05ca@theobroma-systems.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v5,1/6] dt-bindings: serial: Add binding for rs485 receiver enable GPIO | expand |
On Fri, 26 Jan 2024 18:27:42 +0100, Farouk Bouabid wrote: > From: Heiko Stuebner <heiko.stuebner@cherry.de> > > RS485 has two signals to control transmissions "driver enable" (DE) and > "receiver enable" (RE). DE is already handled via the uarts RTS signal > while the RE signal on most implementations doesn't get handled > separately at all. > > As there still will be cases where this is needed though add a gpio > property for declaring this signal pin. > > Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de> > Signed-off-by: Farouk Bouabid <farouk.bouabid@theobroma-systems.com> > --- > Documentation/devicetree/bindings/serial/rs485.yaml | 4 ++++ > 1 file changed, 4 insertions(+) > Reviewed-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/serial/rs485.yaml b/Documentation/devicetree/bindings/serial/rs485.yaml index 9418fd66a8e9..b64577036b5c 100644 --- a/Documentation/devicetree/bindings/serial/rs485.yaml +++ b/Documentation/devicetree/bindings/serial/rs485.yaml @@ -51,6 +51,10 @@ properties: description: enables the receiving of data even while sending data. $ref: /schemas/types.yaml#/definitions/flag + rs485-rx-enable-gpios: + description: GPIO to handle a separate RS485 receive enable signal + maxItems: 1 + rs485-term-gpios: description: GPIO pin to enable RS485 bus termination. maxItems: 1