From: Manivannan Sadhasivam Date: Mon, 20 Apr 2020 17:02:03 +0000 (+0530) Subject: dt-bindings: serial: Document CTS/RTS gpios in STM32 UART X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=888ae871048c6bc5dad695e25106ffdd009da611;p=linux.git dt-bindings: serial: Document CTS/RTS gpios in STM32 UART Document the use of CTS/RTS gpios for flow control in STM32 UART controller. These properties can be used instead of 'st,hw-flow-ctrl' for making use of any gpio pins for flow control instead of dedicated pins. It should be noted that both CTS/RTS and 'st,hw-flow-ctrl' properties cannot co-exist in a design. Reviewed-by: Andy Shevchenko Signed-off-by: Manivannan Sadhasivam Reviewed-by: Rob Herring Link: https://lore.kernel.org/r/20200420170204.24541-2-mani@kernel.org Signed-off-by: Greg Kroah-Hartman --- diff --git a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml index 238c44192d31b..75b8521eb7cb5 100644 --- a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml +++ b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml @@ -48,6 +48,12 @@ properties: minItems: 1 maxItems: 2 + cts-gpios: + maxItems: 1 + + rts-gpios: + maxItems: 1 + wakeup-source: true rs485-rts-delay: true @@ -55,6 +61,14 @@ properties: linux,rs485-enabled-at-boot-time: true rs485-rx-during-tx: true +if: + required: + - st,hw-flow-ctrl +then: + properties: + cts-gpios: false + rts-gpios: false + required: - compatible - reg