On Fri, Feb 14, 2014 at 07:27:18AM +0000, Yuan Yao wrote: > 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@xxxxxxxxxxxxx> > --- > .../devicetree/bindings/serial/fsl-lpuart.txt | 19 +- > drivers/tty/serial/fsl_lpuart.c | 430 ++++++++++++++++++++- > 2 files changed, 433 insertions(+), 16 deletions(-) > > diff --git a/Documentation/devicetree/bindings/serial/fsl-lpuart.txt b/Documentation/devicetree/bindings/serial/fsl-lpuart.txt > index 6fd1dd1..6e1cbbf 100644 > --- a/Documentation/devicetree/bindings/serial/fsl-lpuart.txt > +++ b/Documentation/devicetree/bindings/serial/fsl-lpuart.txt > @@ -5,10 +5,24 @@ Required properties: > - reg : Address and length of the register set for the device > - interrupts : Should contain uart interrupt > > +Optional properties: > +- dmas: List of two DMA specifiers, using a three-cell specifier for each channel. > + a phandle plus two integer cells. The three cells in order are: > + 1.A phandle pointing to the DMA controller. > + 2.specifies the channel group(DMAMUX) in which this request can be multiplexed, > + 3.specifies the request source. The precise format of a dma-specifier is up to the DMA binding. Why does the client binding care? > +- dma-names: Contains one identifier string for each DMA specifier in the dmas property. > + "tx" for the transmit channel, "rx" for the receive channel. > + > +Note: Optional properties for DMA support. Write them both or both not. > + All you need is something like: dmas: A list of two dma specifiers, one for each entry in dma-names dma-names: should contain "tx" and "rx". Thanks, Mark. -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
