dt-bindings: serial: Add binding for rs485 receiver
From: Heiko Stuebner <heiko.stuebner@...> Date: Thu, 26 Mar 2020 00:14:20 +0100
Commit-Message
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@...>
Patch-Comment
Documentation/devicetree/bindings/serial/rs485.yaml | 4 ++++ 1 file changed, 4 insertions(+)
Statistics
- 4 lines added
- 0 lines removed
Changes
------------- Documentation/devicetree/bindings/serial/rs485.yaml --------------
index a9ad17864889..c61226c235f0 100644
@@ -44,6 +44,10 @@ 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