| * 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"; |
| }; |
