diff options
| author | Yuan Yao <yao.yuan@freescale.com> | 2014-02-17 13:28:07 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-18 12:50:26 -0800 |
| commit | f1cd8c8792ccc7e9520ef8f27fbdb748448ac482 (patch) | |
| tree | 817ef690e38a4b9c8e78fbf7c8c2d0364ea12047 /Documentation/devicetree/bindings/serial | |
| parent | c957dd494615ccdb36d4892ef9bfd2287502fbfd (diff) | |
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 <yao.yuan@freescale.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/devicetree/bindings/serial')
| -rw-r--r-- | Documentation/devicetree/bindings/serial/fsl-lpuart.txt | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/Documentation/devicetree/bindings/serial/fsl-lpuart.txt b/Documentation/devicetree/bindings/serial/fsl-lpuart.txt index 6fd1dd1638d..b06e3053af9 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"; + }; |