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Commit 1ff0727a authored by Alexandre TORGUE's avatar Alexandre TORGUE Committed by Greg Kroah-Hartman
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DOCUMENTATION: dt-bindings: Document the STM32 USART bindings 



This adds documentation of device tree bindings for the
STM32 USART

Signed-off-by: default avatarMaxime Coquelin <mcoquelin.stm32@gmail.com>
Signed-off-by: default avatarAlexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ada8618f

Documentation/devicetree/bindings/serial/st,stm32-usart.txt

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* STMicroelectronics STM32 USART



Required properties:

- compatible: Can be either "st,stm32-usart", "st,stm32-uart",

"st,stm32f7-usart" or "st,stm32f7-uart" depending on whether

the device supports synchronous mode and is compatible with

stm32(f4) or stm32f7.

- reg: The address and length of the peripheral registers space

- interrupts: The interrupt line of the USART instance

- clocks: The input clock of the USART instance



Optional properties:

- pinctrl: The reference on the pins configuration

- st,hw-flow-ctrl: bool flag to enable hardware flow control.



Examples:

usart4: serial@40004c00 {

	compatible = "st,stm32-uart";

	reg = <0x40004c00 0x400>;

	interrupts = <52>;

	clocks = <&clk_pclk1>;

	pinctrl-names = "default";

	pinctrl-0 = <&pinctrl_usart4>;

};



usart2: serial@40004400 {

	compatible = "st,stm32-usart", "st,stm32-uart";

	reg = <0x40004400 0x400>;

	interrupts = <38>;

	clocks = <&clk_pclk1>;

	st,hw-flow-ctrl;

	pinctrl-names = "default";

	pinctrl-0 = <&pinctrl_usart2 &pinctrl_usart2_rtscts>;

};