MLK-20351-2 Doc: fsl-imx-cspi: Add a description of dmas cells

The description of dmas pointed to the common description of dma,
and the introduction of dmas was unclear. Add a doc link to sdma
introduction.

Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Signed-off-by: Arulpandiyan Vadivel <arulpandiyan_vadivel@mentor.com>

diff --git a/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt b/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt
index e3c48b2..5fa03a7 100644 (file)
--- a/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt
+++ b/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt
@@ -16,6 +16,11 @@ Required properties:
 - clock-names : Clock names should include both "ipg" and "per"
 See the clock consumer binding,
        Documentation/devicetree/bindings/clock/clock-bindings.txt
+- dmas: DMA specifiers for tx and rx dma. See the DMA client binding,
+               Documentation/devicetree/bindings/dma/dma.txt
+       For the description of the second cell of dma phandle, see this document,
+               Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt
+- dma-names: DMA request names should include "tx" and "rx" if present.
 
 Recommended properties:
 - cs-gpios : GPIOs to use as chip selects, see spi-bus.txt.  While the native chip