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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.
- dmas: phandle(s) to DMA controller node(s). Refer to stm32-dma.txt
- dma-names: "rx" and/or "tx"
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>;
};
usart1: serial@40011000 {
compatible = "st,stm32-usart", "st,stm32-uart";
reg = <0x40011000 0x400>;
interrupts = <37>;
clocks = <&rcc 0 164>;
dmas = <&dma2 2 4 0x414 0x0>,
<&dma2 7 4 0x414 0x0>;
dma-names = "rx", "tx";
};
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