Kernel-4.18.0-80.el8_fsl-lpuart

• Freescale low power universal asynchronous receiver/transmitter (lpuart)

Required properties:

• compatible :
  • “fsl,vf610-lpuart” for lpuart compatible with the one integrated
    on Vybrid vf610 SoC with 8-bit register organization
  • “fsl,ls1021a-lpuart” for lpuart compatible with the one integrated
    on LS1021A SoC with 32-bit big-endian register organization
  • “fsl,imx7ulp-lpuart” for lpuart compatible with the one integrated
    on i.MX7ULP SoC with 32-bit little-endian register organization
• reg : Address and length of the register set for the device
• interrupts : Should contain uart interrupt
• clocks : phandle + clock specifier pairs, one for each entry in clock-names
• clock-names : should contain: “ipg” - the uart clock

Optional properties:

• dmas: A list of two dma specifiers, one for each entry in dma-names.
• dma-names: should contain “tx” and “rx”.
• rs485-rts-delay, rs485-rts-active-low, rs485-rx-during-tx,
  linux,rs485-enabled-at-boot-time: see rs485.txt

Note: Optional properties for DMA support. Write them both or both not.

Example:

uart0: serial@40027000 {
compatible = “fsl,vf610-lpuart”;
reg = <0x40027000 0x1000>;
interrupts = <0 61 0x00>;
clocks = <&clks VF610_CLK_UART0>;
clock-names = “ipg”;
dmas = <&edma0 0 2>,
<&edma0 0 3>;
dma-names = “rx”,”tx”;
};