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- * STMicroelectronics STM32 USART
- Required properties:
- - compatible: can be either:
- - "st,stm32-uart",
- - "st,stm32f7-uart",
- - "st,stm32h7-uart".
- depending is compatible with stm32(f4), stm32f7 or stm32h7.
- - reg: The address and length of the peripheral registers space
- - interrupts:
- - The interrupt line for the USART instance,
- - An optional wake-up interrupt.
- - 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.
- - 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"
- 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-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-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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