| Message ID | 1568793876-9009-2-git-send-email-gareth.williams.jx@renesas.com (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
| Series | spi: dw: Add basic runtime PM support | expand |
On Wed, 18 Sep 2019 09:04:33 +0100, Gareth Williams wrote: > From: Phil Edworthy <phil.edworthy@renesas.com> > > 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@renesas.com> > Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com> > --- > 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. > > v2: > - No changes. > --- > 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 > Reviewed-by: Rob Herring <robh@kernel.org>
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"