From f1cd8c8792ccc7e9520ef8f27fbdb748448ac482 Mon Sep 17 00:00:00 2001 From: Yuan Yao Date: Mon, 17 Feb 2014 13:28:07 +0800 Subject: serial: fsl_lpuart: add DMA support Add dma support for lpuart. This function depend on DMA driver. You can turn on it by write both the dmas and dma-name properties in dts node. Signed-off-by: Yuan Yao Acked-by: Arnd Bergmann Acked-by: Mark Rutland Signed-off-by: Greg Kroah-Hartman --- Documentation/devicetree/bindings/serial/fsl-lpuart.txt | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) (limited to 'Documentation/devicetree/bindings/serial') diff --git a/Documentation/devicetree/bindings/serial/fsl-lpuart.txt b/Documentation/devicetree/bindings/serial/fsl-lpuart.txt index 6fd1dd1..b06e305 100644 --- a/Documentation/devicetree/bindings/serial/fsl-lpuart.txt +++ b/Documentation/devicetree/bindings/serial/fsl-lpuart.txt @@ -5,10 +5,19 @@ Required properties: - reg : Address and length of the register set for the device - interrupts : Should contain uart interrupt +Optional properties: +- dmas: A list of two dma specifiers, one for each entry in dma-names. +- dma-names: should contain "tx" and "rx". + +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>; - }; + compatible = "fsl,vf610-lpuart"; + reg = <0x40027000 0x1000>; + interrupts = <0 61 0x00>; + dmas = <&edma0 0 2>, + <&edma0 0 3>; + dma-names = "rx","tx"; + }; -- cgit v1.1