Messages in this thread Patch in this message | | | From | mani@kernel ... | Subject | [PATCH v3 1/2] dt-bindings: serial: Document CTS/RTS gpios in STM32 UART | Date | Mon, 20 Apr 2020 22:32:03 +0530 |
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From: Manivannan Sadhasivam <mani@kernel.org>
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 <andy.shevchenko@gmail.com> Signed-off-by: Manivannan Sadhasivam <mani@kernel.org> --- .../devicetree/bindings/serial/st,stm32-uart.yaml | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml index 238c44192d31..75b8521eb7cb 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 -- 2.17.1
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