From: Erwan Le Ray Date: Wed, 6 Jan 2021 16:22:00 +0000 (+0100) Subject: dt-bindings: serial: stm32: update rts-gpios and cts-gpios X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9ba8377c3aadf4dba94da1e9f98faad2eb72737d;p=linux.git dt-bindings: serial: stm32: update rts-gpios and cts-gpios Update rts-gpios and cts-gpios: - remove max-items as already defined in serial.yaml - add a note describing rts-gpios and cts-gpios usage with stm32 Document the use of cts-gpios and rts-gpios for flow control in STM32 UART controller. These properties can be used instead of 'uart-has-rtscts' or 'st,hw-flow-ctrl' (deprecated) for making use of any gpio pins for flow control instead of dedicated pins. It should be noted that both cts-gpios/rts-gpios and 'uart-has-rtscts' or 'st,hw-flow-ctrl' (deprecated) properties cannot co-exist in a design. Acked-by: Rob Herring Signed-off-by: Erwan Le Ray Link: https://lore.kernel.org/r/20210106162203.28854-6-erwan.leray@foss.st.com 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 06d5f251ec880..8631678283f9a 100644 --- a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml +++ b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml @@ -50,11 +50,14 @@ properties: minItems: 1 maxItems: 2 - cts-gpios: - maxItems: 1 - - rts-gpios: - maxItems: 1 +# cts-gpios and rts-gpios properties can be used instead of 'uart-has-rtscts' +# or 'st,hw-flow-ctrl' (deprecated) for making use of any gpio pins for flow +# control instead of dedicated pins. +# +# It should be noted that both cts-gpios/rts-gpios and 'uart-has-rtscts' or +# 'st,hw-flow-ctrl' (deprecated) properties cannot co-exist in a design. + cts-gpios: true + rts-gpios: true wakeup-source: true