Commit 888ae871 authored by Manivannan Sadhasivam's avatar Manivannan Sadhasivam Committed by Greg Kroah-Hartman

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: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: default avatarManivannan Sadhasivam <mani@kernel.org>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200420170204.24541-2-mani@kernel.orgSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7d31676a
...@@ -48,6 +48,12 @@ properties: ...@@ -48,6 +48,12 @@ properties:
minItems: 1 minItems: 1
maxItems: 2 maxItems: 2
cts-gpios:
maxItems: 1
rts-gpios:
maxItems: 1
wakeup-source: true wakeup-source: true
rs485-rts-delay: true rs485-rts-delay: true
...@@ -55,6 +61,14 @@ properties: ...@@ -55,6 +61,14 @@ properties:
linux,rs485-enabled-at-boot-time: true linux,rs485-enabled-at-boot-time: true
rs485-rx-during-tx: true rs485-rx-during-tx: true
if:
required:
- st,hw-flow-ctrl
then:
properties:
cts-gpios: false
rts-gpios: false
required: required:
- compatible - compatible
- reg - reg
......
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