| * Freescale MXS Application UART (AUART) |
| |
| Required properties for all SoCs: |
| - compatible : Should be one of fallowing variants: |
| "fsl,imx23-auart" - Freescale i.MX23 |
| "fsl,imx28-auart" - Freescale i.MX28 |
| "alphascale,asm9260-auart" - Alphascale ASM9260 |
| - reg : Address and length of the register set for the device |
| - interrupts : Should contain the auart interrupt numbers |
| - dmas: DMA specifier, consisting of a phandle to DMA controller node |
| and AUART DMA channel ID. |
| Refer to dma.txt and fsl-mxs-dma.txt for details. |
| - dma-names: "rx" for RX channel, "tx" for TX channel. |
| |
| Required properties for "alphascale,asm9260-auart": |
| - clocks : the clocks feeding the watchdog timer. See clock-bindings.txt |
| - clock-names : should be set to |
| "mod" - source for tick counter. |
| "ahb" - ahb gate. |
| |
| Optional properties: |
| - uart-has-rtscts : Indicate the UART has RTS and CTS lines |
| for hardware flow control, |
| it also means you enable the DMA support for this UART. |
| - {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD |
| line respectively. It will use specified PIO instead of the peripheral |
| function pin for the USART feature. |
| If unsure, don't specify this property. |
| |
| Example: |
| auart0: serial@8006a000 { |
| compatible = "fsl,imx28-auart", "fsl,imx23-auart"; |
| reg = <0x8006a000 0x2000>; |
| interrupts = <112>; |
| dmas = <&dma_apbx 8>, <&dma_apbx 9>; |
| dma-names = "rx", "tx"; |
| cts-gpios = <&gpio1 15 GPIO_ACTIVE_LOW>; |
| dsr-gpios = <&gpio1 16 GPIO_ACTIVE_LOW>; |
| dcd-gpios = <&gpio1 17 GPIO_ACTIVE_LOW>; |
| }; |
| |
| Note: Each auart port should have an alias correctly numbered in "aliases" |
| node. |
| |
| Example: |
| |
| aliases { |
| serial0 = &auart0; |
| serial1 = &auart1; |
| serial2 = &auart2; |
| serial3 = &auart3; |
| serial4 = &auart4; |
| }; |
