[PATCH 1/3] Documentation:spi:fsl-dspi:add DSPI dma transfer support

[Chao Fu <b44548@xxxxxxxxxxxxx>]

From: Chao Fu <B44548@xxxxxxxxxxxxx>

Add bool value use-dma.
The bool will determine whether DSPI use dma channel transfer data
in a platform.

Add dmas and dma-names for describing dma channels of DSPI.

Signed-off-by: Chao Fu      <b44548@xxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt b/Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt
index 5376de4..76a1039 100644
--- a/Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt
+++ b/Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt
@@ -11,6 +11,11 @@ Required properties:
 - spi-num-chipselects : the number of the chipselect signals.
 - bus-num : the slave chip chipselect signal number.
 - big-endian : if DSPI modudle is big endian, the bool will be set in node.
+- use-dma: the bool decide if use dma method in DSPI transfering.
+- dmas: List of DMA specifiers with the controller specific format
+	as described in the generic DMA client binding. A tx and rx
+	specifier is required for each chip select.
+- dma-names: Should be named "tx" and "rx".
 Example:
 
 dspi0@4002c000 {
@@ -26,6 +31,10 @@ dspi0@4002c000 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_dspi0_1>;
 	big-endian;
+	use-dma;
+	dmas = <&edma0 0 12>,
+		<&edma0 0 13>;
+	dma-names = "rx", "tx";
 	status = "okay";
 
 	sflash: at26df081a@0 {
-- 
1.8.4


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