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Diffstat (limited to 'Documentation/devicetree/bindings/serial/fsl-lpuart.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/serial/fsl-lpuart.txt | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/serial/fsl-lpuart.txt b/Documentation/devicetree/bindings/serial/fsl-lpuart.txt new file mode 100644 index 000000000..6bd3f2e93 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/fsl-lpuart.txt @@ -0,0 +1,35 @@ +* 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"; + }; |