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of/spi: Support specifying chip select as active high via device tree

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The patch allows to specify that an SPI device needs an active high chip
select.

Signed-off-by: Wolfgang Ocker <weo@reccoware.de>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Wolfgang Ocker
2008-10-15 15:00:47 +02:00
committed by Kumar Gala
parent fd657efc67
commit f618ebfcbf
2 changed files with 4 additions and 0 deletions
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Documentation/powerpc/booting-without-of.txt
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@@ -1917,6 +1917,8 @@ platforms are moved over to use the flattened-device-tree model.
inverse clock polarity (CPOL) mode
- spi-cpha - (optional) Empty property indicating device requires
shifted clock phase (CPHA) mode
- spi-cs-high - (optional) Empty property indicating device requires
chip select active high
SPI example for an MPC5200 SPI bus:
spi@f00 {