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

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