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dt: snps,dw-apb-ssi: Document new I/O data register width property 

This change documents a new property for the snps,dw-apb-ssi device,
allowing an implementer to specify either four byte or two bytes
access to the SPI controller data register.

This supports a change that unbreaks this driver on picoXcell
platforms.

Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Michael van der Westhuizen 2015-08-18 22:21:52 +02:00 committed by Mark Brown
parent bc0195aad0
commit 4b226fbde6
1 changed files with 2 additions and 0 deletions
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Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt
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@ -10,6 +10,8 @@ Required properties:
Optional properties:
- cs-gpios : Specifies the gpio pis to be used for chipselects.
- num-cs : The number of chipselects. If omitted, this will default to 4.
- reg-io-width : The I/O register width (in bytes) implemented by this
device. Supported values are 2 or 4 (the default).
Child nodes as per the generic SPI binding.