Commit 888ae871 authored Apr 20, 2020 by Manivannan Sadhasivam Committed by Greg Kroah-Hartman May 15, 2020

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 <andy.shevchenko@gmail.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200420170204.24541-2-mani@kernel.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 7d31676a

Documentation/devicetree/bindings/serial/st,stm32-uart.yaml

+14 −0

Original line number	Diff line number	Diff line
		@@ -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

Admin message