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

   1 * STMicroelectronics STM32 USART
   2
   3 Required properties:
   4 - compatible: can be either:
   5   - "st,stm32-usart",
   6   - "st,stm32-uart",
   7   - "st,stm32f7-usart",
   8   - "st,stm32f7-uart",
   9   - "st,stm32h7-usart"
  10   - "st,stm32h7-uart".
  11   depending on whether the device supports synchronous mode
  12   and is compatible with stm32(f4), stm32f7 or stm32h7.
  13 - reg: The address and length of the peripheral registers space
  14 - interrupts:
  15   - The interrupt line for the USART instance,
  16   - An optional wake-up interrupt.
  17 - clocks: The input clock of the USART instance
  18
  19 Optional properties:
  20 - pinctrl: The reference on the pins configuration
  21 - st,hw-flow-ctrl: bool flag to enable hardware flow control.
  22 - dmas: phandle(s) to DMA controller node(s). Refer to stm32-dma.txt
  23 - dma-names: "rx" and/or "tx"
  24
  25 Examples:
  26 usart4: serial@40004c00 {
  27         compatible = "st,stm32-uart";
  28         reg = <0x40004c00 0x400>;
  29         interrupts = <52>;
  30         clocks = <&clk_pclk1>;
  31         pinctrl-names = "default";
  32         pinctrl-0 = <&pinctrl_usart4>;
  33 };
  34
  35 usart2: serial@40004400 {
  36         compatible = "st,stm32-usart", "st,stm32-uart";
  37         reg = <0x40004400 0x400>;
  38         interrupts = <38>;
  39         clocks = <&clk_pclk1>;
  40         st,hw-flow-ctrl;
  41         pinctrl-names = "default";
  42         pinctrl-0 = <&pinctrl_usart2 &pinctrl_usart2_rtscts>;
  43 };
  44
  45 usart1: serial@40011000 {
  46         compatible = "st,stm32-usart", "st,stm32-uart";
  47         reg = <0x40011000 0x400>;
  48         interrupts = <37>;
  49         clocks = <&rcc 0 164>;
  50         dmas = <&dma2 2 4 0x414 0x0>,
  51                <&dma2 7 4 0x414 0x0>;
  52         dma-names = "rx", "tx";
  53 };