On Wed, Nov 21, 2018 at 5:29 AM Radu Pirea <radu_nicolae.pirea@xxxxxx> wrote: > > The bindings for DMA are now common for both drivers of the USART > IP. > > The node given as an example for USART in SPI mode has been updated in > order to include DMA bindings. > > Signed-off-by: Radu Pirea <radu_nicolae.pirea@xxxxxx> > --- > .../devicetree/bindings/mfd/atmel-usart.txt | 15 ++++++++++----- > 1 file changed, 10 insertions(+), 5 deletions(-) > > diff --git a/Documentation/devicetree/bindings/mfd/atmel-usart.txt b/Documentation/devicetree/bindings/mfd/atmel-usart.txt > index 7f0cd72f47d2..8ad008175343 100644 > --- a/Documentation/devicetree/bindings/mfd/atmel-usart.txt > +++ b/Documentation/devicetree/bindings/mfd/atmel-usart.txt > @@ -17,17 +17,19 @@ Required properties for USART in SPI mode: > - cs-gpios: chipselects (internal cs not supported) > - atmel,usart-mode : Must be <AT91_USART_MODE_SPI> (found in dt-bindings/mfd/at91-usart.h) > > +Optional properties in serial and SPI mode: > +- dma bindings for dma transfer: > + - dmas: DMA specifier, consisting of a phandle to DMA controller node, > + memory peripheral interface and USART DMA channel ID, FIFO configuration. > + Refer to dma.txt and atmel-dma.txt for details. > + - dma-names: "rx" for RX channel, "tx" for TX channel. > + dma-names = "tx", "rx"; The dma-names should have a defined order. Rob
