From: Phil Edworthy <phil.edworthy@xxxxxxxxxxx> The Renesas RZ/N1 SPI Controller is based on the Synopsys DW SSI, but has additional registers for software CS control and DMA. This patch does not address the changes required for DMA support, it simply adds the compatible string. The CS functionality is not very useful and also not needed as Linux can use gpios for the CS signals. Add a compatible string to handle any unforeseen issues that may arise, and pave the way for DMA support. Signed-off-by: Gareth Williams <gareth.williams.jx@xxxxxxxxxxx> Signed-off-by: Phil Edworthy <phil.edworthy@xxxxxxxxxxx> --- Note: All the other manufacturers detail their compatible strings in snps,dw-apb-ssi.txt. I think it makes sense for rzn1 to be in it's own file due to the changes made to the peripheral for DMA support. --- Documentation/devicetree/bindings/spi/renesas,rzn1-spi.txt | 11 +++++++++++ 1 file changed, 11 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/renesas,rzn1-spi.txt diff --git a/Documentation/devicetree/bindings/spi/renesas,rzn1-spi.txt b/Documentation/devicetree/bindings/spi/renesas,rzn1-spi.txt new file mode 100644 index 0000000..fb1a672 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/renesas,rzn1-spi.txt @@ -0,0 +1,11 @@ +Renesas RZ/N1 SPI Controller + +This controller is based on the Synopsys DW Synchronous Serial Interface and +inherits all properties defined in snps,dw-apb-ssi.txt except for the +compatible property. + +Required properties: +- compatible : The device specific string followed by the generic RZ/N1 string. + Therefore it must be one of: + "renesas,r9a06g032-spi", "renesas,rzn1-spi" + "renesas,r9a06g033-spi", "renesas,rzn1-spi" -- 2.7.4
