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authorSimon Glass <sjg@chromium.org>2014-07-07 10:16:39 -0600
committerJagannadha Sutradharudu Teki <jaganna@xilinx.com>2014-08-06 00:18:01 +0530
commit22052c6236cbebc446ffd51ac69271fe063c654a (patch)
treed1620dd86f989f4481a760fa4c41b684ba6896ab /doc
parenta4e29db2571144a05ad09380b3674fe5b492f693 (diff)
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spi: Support half-duplex mode in FDT decode
This parameter should also be supported. Signed-off-by: Simon Glass <sjg@chromium.org> Tested-by: Ajay Kumar <ajaykumar.rs@samsung.com> Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Diffstat (limited to 'doc')
-rw-r--r--doc/device-tree-bindings/spi/spi-bus.txt2
1 files changed, 2 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/spi/spi-bus.txt b/doc/device-tree-bindings/spi/spi-bus.txt
index 800dafe..5c8720a 100644
--- a/doc/device-tree-bindings/spi/spi-bus.txt
+++ b/doc/device-tree-bindings/spi/spi-bus.txt
@@ -59,6 +59,8 @@ contain the following properties.
used for MOSI. Defaults to 1 if not present.
- spi-rx-bus-width - (optional) The bus width(number of data wires) that
used for MISO. Defaults to 1 if not present.
+- spi-half-duplex - (optional) Indicates that the SPI bus should wait for
+ a header byte before reading data from the slave.
Some SPI controllers and devices support Dual and Quad SPI transfer mode.
It allows data in SPI system transfered in 2 wires(DUAL) or 4 wires(QUAD).