devicetree: bindings: spi: update device tree for IO mode support

This patch adds has-io-mode as an optional boolean property.
if it exists then controller operates in IO mode otherwise
in dma mode

Signed-off-by: Naga Sureshkumar Relli <nagasure@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/Documentation/devicetree/bindings/spi/spi-zynqmp-qspi.txt b/Documentation/devicetree/bindings/spi/spi-zynqmp-qspi.txt
index c8f50e5cf70b9b966d9e6bf0c00583f5f9fd11ea..ae50473bcb0e8eeb8153484f449dafe667bfcf02 100644 (file)
--- a/Documentation/devicetree/bindings/spi/spi-zynqmp-qspi.txt
+++ b/Documentation/devicetree/bindings/spi/spi-zynqmp-qspi.txt
@@ -13,6 +13,9 @@ Required properties:
 
 Optional properties:
 - num-cs               : Number of chip selects used.
+- has-io-mode          : boolean property describes the controller operating
+                         mode. if exists controller will operate in IO mode
+                         else dma mode.
 
 Example:
        qspi: spi@ff0f0000 {