fsl-mxs-auart.txt

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    1 * Freescale MXS Application UART (AUART)
    2 
    3 Required properties for all SoCs:
    4 - compatible : Should be one of fallowing variants:
    5         "fsl,imx23-auart" - Freescale i.MX23
    6         "fsl,imx28-auart" - Freescale i.MX28
    7         "alphascale,asm9260-auart" - Alphascale ASM9260
    8 - reg : Address and length of the register set for the device
    9 - interrupts : Should contain the auart interrupt numbers
   10 - dmas: DMA specifier, consisting of a phandle to DMA controller node
   11   and AUART DMA channel ID.
   12   Refer to dma.txt and fsl-mxs-dma.txt for details.
   13 - dma-names: "rx" for RX channel, "tx" for TX channel.
   14 
   15 Required properties for "alphascale,asm9260-auart":
   16 - clocks : the clocks feeding the watchdog timer. See clock-bindings.txt
   17 - clock-names : should be set to
   18         "mod" - source for tick counter.
   19         "ahb" - ahb gate.
   20 
   21 Optional properties:
   22 - uart-has-rtscts : Indicate the UART has RTS and CTS lines
   23   for hardware flow control,
   24         it also means you enable the DMA support for this UART.
   25 - {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD
   26   line respectively. It will use specified PIO instead of the peripheral
   27   function pin for the USART feature.
   28   If unsure, don't specify this property.
   29 
   30 Example:
   31 auart0: serial@8006a000 {
   32         compatible = "fsl,imx28-auart", "fsl,imx23-auart";
   33         reg = <0x8006a000 0x2000>;
   34         interrupts = <112>;
   35         dmas = <&dma_apbx 8>, <&dma_apbx 9>;
   36         dma-names = "rx", "tx";
   37         cts-gpios = <&gpio1 15 GPIO_ACTIVE_LOW>;
   38         dsr-gpios = <&gpio1 16 GPIO_ACTIVE_LOW>;
   39         dcd-gpios = <&gpio1 17 GPIO_ACTIVE_LOW>;
   40 };
   41 
   42 Note: Each auart port should have an alias correctly numbered in "aliases"
   43 node.
   44 
   45 Example:
   46 
   47 aliases {
   48         serial0 = &auart0;
   49         serial1 = &auart1;
   50         serial2 = &auart2;
   51         serial3 = &auart3;
   52         serial4 = &auart4;
   53 };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/serial/fsl-mxs-auart.txt

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sys/contrib/device-tree/Bindings/serial/fsl-mxs-auart.txt