[PATCH 5/8] dt-bindings: serial: stm32: update rts-gpios and cts-gpios

[Rob Herring]

On Fri, 18 Dec 2020 20:00:16 +0100, Erwan Le Ray wrote:
> 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.
> 
> Signed-off-by: Erwan Le Ray <erwan.leray at foss.st.com>
> 

Acked-by: Rob Herring <robh at kernel.org>