From: Matt Porter <mporter@xxxxxx>
The binding definition is based on the generic DMA request binding
Signed-off-by: Matt Porter <mporter@xxxxxx>
Signed-off-by: Joel A Fernandes <joelagnel@xxxxxx>
---
Documentation/devicetree/bindings/spi/omap-spi.txt | 27 +++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/spi/omap-spi.txt b/Documentation/devicetree/bindings/spi/omap-spi.txt
index 938809c..4c85c4c 100644
--- a/Documentation/devicetree/bindings/spi/omap-spi.txt
+++ b/Documentation/devicetree/bindings/spi/omap-spi.txt
@@ -10,7 +10,18 @@ Required properties:
input. The default is D0 as input and
D1 as output.
-Example:
+Optional properties:
+- 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: List of DMA request names. These strings correspond
+ 1:1 with the DMA specifiers listed in dmas. The string naming
+ is to be "rxN" and "txN" for RX and TX requests,
+ respectively, where N equals the chip select number.
+
+Examples:
+
+[hwmod populated DMA resources]
mcspi1: mcspi@1 {
#address-cells = <1>;
@@ -20,3 +31,17 @@ mcspi1: mcspi@1 {
ti,spi-num-cs = <4>;
};
+[generic DMA request binding]
+
+mcspi1: mcspi@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "ti,omap4-mcspi";
+ ti,hwmods = "mcspi1";
+ ti,spi-num-cs = <2>;
+ dmas = <&edma 42
+ &edma 43
+ &edma 44
+ &edma 45>;
+ dma-names = "tx0", "rx0", "tx1", "rx1";
+};
--
1.7.9.5
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