[PATCH 2/2] dt: snps, dw-apb-ssi: Describe 16 bit data register usage limitations
From: Michael van der Westhuizen <hidden>
Date: 2015-06-19 08:43:54
Also in:
linux-devicetree, linux-spi
Subsystem:
open firmware and flattened device tree bindings, spi subsystem, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Mark Brown, Linus Torvalds
This change documents a new property for the snps,dw-apb-ssi device, allowing an implementer to interact with the SPI controller data register in 16 bit mode only. This supports a change that unbreaks this driver on picoXcell platforms. Signed-off-by: Michael van der Westhuizen <redacted> --- Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt
index bd99193..3b2a86f 100644
--- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt
+++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt@@ -10,6 +10,9 @@ 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. +- snps,data-io-16bit : A boolean property that, when present, causes + the driver to interact with the data register using 16 bit I/O instead + of the default 32 bit I/O. Child nodes as per the generic SPI binding.
--
2.1.4