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dt-bindings: serial: stm32: add RS485 optional properties

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Add options for enabling RS485 hardware control and configuring
Driver Enable signal:
- rs485-rts-delay
- rs485-rx-during-tx
- rs485-rts-active-low
- linux,rs485-enabled-at-boot-time

Signed-off-by: Bich Hemon <bich.hemon@st.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bich HEMON 2018-03-12 09:50:04 +00:00 committed by Greg Kroah-Hartman
parent ce290a1960
commit 241672cb4b
1 changed files with 2 additions and 0 deletions
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2
Documentation/devicetree/bindings/serial/st,stm32-usart.txt
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@ -15,6 +15,8 @@ Required properties:
Optional properties:
- pinctrl: The reference on the pins configuration
- st,hw-flow-ctrl: bool flag to enable hardware flow control.
- rs485-rts-delay, rs485-rx-during-tx, rs485-rts-active-low,
linux,rs485-enabled-at-boot-time: see rs485.txt.
- dmas: phandle(s) to DMA controller node(s). Refer to stm32-dma.txt
- dma-names: "rx" and/or "tx"