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-rw-r--r--Documentation/devicetree/bindings/mtd/spi-nor-flash.txt7
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diff --git a/Documentation/devicetree/bindings/mtd/spi-nor-flash.txt b/Documentation/devicetree/bindings/mtd/spi-nor-flash.txt
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+++ b/Documentation/devicetree/bindings/mtd/spi-nor-flash.txt
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+This file defines some DT properties for specific SPI NOR flash features.
+The SPI NOR controller drivers may refer to this file, such as fsl-quadspi.txt
+
+Optional properties:
+ - spi-nor,ddr-quad-read-dummy: The dummy cycles used by the DDR Quad read.
+ Please refer to the chip's datasheet. This
+ property can be 4 or 6 which is less then 8.