1 * STMicroelectronics STM32 USART
4 - compatible: can be either:
8 depending is compatible with stm32(f4), stm32f7 or stm32h7.
9 - reg: The address and length of the peripheral registers space
11 - The interrupt line for the USART instance,
12 - An optional wake-up interrupt.
13 - clocks: The input clock of the USART instance
16 - pinctrl: The reference on the pins configuration
17 - st,hw-flow-ctrl: bool flag to enable hardware flow control.
18 - rs485-rts-delay, rs485-rx-during-tx, rs485-rts-active-low,
19 linux,rs485-enabled-at-boot-time: see rs485.txt.
20 - dmas: phandle(s) to DMA controller node(s). Refer to stm32-dma.txt
21 - dma-names: "rx" and/or "tx"
24 usart4: serial@40004c00 {
25 compatible = "st,stm32-uart";
26 reg = <0x40004c00 0x400>;
28 clocks = <&clk_pclk1>;
29 pinctrl-names = "default";
30 pinctrl-0 = <&pinctrl_usart4>;
33 usart2: serial@40004400 {
34 compatible = "st,stm32-uart";
35 reg = <0x40004400 0x400>;
37 clocks = <&clk_pclk1>;
39 pinctrl-names = "default";
40 pinctrl-0 = <&pinctrl_usart2 &pinctrl_usart2_rtscts>;
43 usart1: serial@40011000 {
44 compatible = "st,stm32-uart";
45 reg = <0x40011000 0x400>;
47 clocks = <&rcc 0 164>;
48 dmas = <&dma2 2 4 0x414 0x0>,
49 <&dma2 7 4 0x414 0x0>;
50 dma-names = "rx", "tx";