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spi: Add support for specifying 3-wire mode via device tree

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This patch allows to specify that a SPI device is connected in 3-wire mode via
device tree.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Lars-Peter Clausen
2012-12-06 16:55:33 +01:00
committed by Grant Likely
parent 5323f49853
commit c20151dff8
2 changed files with 4 additions and 0 deletions
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2
Documentation/devicetree/bindings/spi/spi-bus.txt
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@@ -53,6 +53,8 @@ contain the following properties.
shifted clock phase (CPHA) mode
- spi-cs-high - (optional) Empty property indicating device requires
chip select active high
- spi-3wire - (optional) Empty property indicating device requires
3-wire mode.
If a gpio chipselect is used for the SPI slave the gpio number will be passed
via the cs_gpio