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| author |   Manivannan Sadhasivam <mani@kernel.org> | 2020-04-20 22:32:03 +0530 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-15 12:24:15 +0200 |
| commit | 888ae871048c6bc5dad695e25106ffdd009da611 (patch) | |
| tree | 1ad9dc76701b0310437d8b346feb61b48d6f7f92 | |
| parent | tty: serial: samsung: Correct clock selection logic (diff) | |
| download | linux-dev-888ae871048c6bc5dad695e25106ffdd009da611.tar.xz linux-dev-888ae871048c6bc5dad695e25106ffdd009da611.zip | |
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>
| -rw-r--r-- | Documentation/devicetree/bindings/serial/st,stm32-uart.yaml | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml index 238c44192d31..75b8521eb7cb 100644 --- a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml +++ b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml @@ -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 |