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Date: Tue, 21 Nov 2023 09:28:12 +0100 (CET) From: "Tomas Paukrt" <tomaspaukrt@...il.cz> To: "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>, "Jiri Slaby" <jirislaby@...nel.org>, "Rob Herring" <robh+dt@...nel.org>, "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>, "Conor Dooley" <conor+dt@...nel.org> Cc: <linux-kernel@...r.kernel.org>, <linux-serial@...r.kernel.org>, <devicetree@...r.kernel.org> Subject: [PATCH v4 2/2] dt-bindings: serial: Add support for enabling RS485 mode via GPIO at boot time Add an option to enable the RS485 mode at boot time based on the state of a GPIO pin (DIP switch or configuration jumper). The GPIO is defined by the device tree property "linux,rs485-mode-gpio". Signed-off-by: Tomas Paukrt <tomaspaukrt@...il.cz> --- Documentation/devicetree/bindings/serial/rs485.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/serial/rs485.yaml b/Documentation/devicetree/bindings/serial/rs485.yaml index 9418fd6..7a72f37 100644 --- a/Documentation/devicetree/bindings/serial/rs485.yaml +++ b/Documentation/devicetree/bindings/serial/rs485.yaml @@ -47,6 +47,10 @@ properties: later with proper ioctl. $ref: /schemas/types.yaml#/definitions/flag + linux,rs485-mode-gpio: + description: GPIO pin to enable RS485 mode at boot time. + maxItems: 1 + rs485-rx-during-tx: description: enables the receiving of data even while sending data. $ref: /schemas/types.yaml#/definitions/flag -- 2.7.4
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