[PATCH 02/17] dt-bindings: spi: dw: Add DMA properties bindings

[Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>]

Since DW SPI controller may use DW DMA engine to perform the CPU-less
Tx/Rx SPI transfers and the DW SPI driver now supports it, lets alter
the DW SPI bindings file to accept the Rx and Tx DMA line specifiers.

Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>
Cc: Georgy Vlasov <Georgy.Vlasov@xxxxxxxxxxxxxxxxxxxx>
Cc: Ramil Zaripov <Ramil.Zaripov@xxxxxxxxxxxxxxxxxxxx>
Cc: Alexey Malahov <Alexey.Malahov@xxxxxxxxxxxxxxxxxxxx>
Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Cc: Paul Burton <paulburton@xxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Allison Randal <allison@xxxxxxxxxxx>
Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Gareth Williams <gareth.williams.jx@xxxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxxx
---
 .../devicetree/bindings/spi/snps,dw-apb-ssi.yaml       | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
index e2f6d8aa6181..454208842084 100644
--- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
+++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
@@ -73,6 +73,16 @@ properties:
     minimum: 1
     maximum: 4
 
+  dmas:
+    items:
+      - description: TX DMA Channel
+      - description: RX DMA Channel
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
 patternProperties:
   "^.*@[0-9a-f]+$":
     type: object
-- 
2.25.1