spi: dt-bindings: introduce FIFO depth properties

[linux-2.6-microblaze.git] / Documentation / devicetree / bindings / spi / spi-controller.yaml

diff --git a/Documentation/devicetree/bindings/spi/spi-controller.yaml b/Documentation/devicetree/bindings/spi/spi-controller.yaml
index 524f6fe..093150c 100644 (file)
--- a/Documentation/devicetree/bindings/spi/spi-controller.yaml
+++ b/Documentation/devicetree/bindings/spi/spi-controller.yaml
@@ -69,6 +69,21 @@ properties:
          Should be generally avoided and be replaced by
          spi-cs-high + ACTIVE_HIGH.
 
+  fifo-depth:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Size of the RX and TX data FIFOs in bytes.
+
+  rx-fifo-depth:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Size of the RX data FIFO in bytes.
+
+  tx-fifo-depth:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Size of the TX data FIFO in bytes.
+
   num-cs:
     $ref: /schemas/types.yaml#/definitions/uint32
     description:
@@ -116,6 +131,10 @@ patternProperties:
       - compatible
       - reg
 
+dependencies:
+  rx-fifo-depth: [ tx-fifo-depth ]
+  tx-fifo-depth: [ rx-fifo-depth ]
+
 allOf:
   - if:
       not:
@@ -129,6 +148,14 @@ allOf:
       properties:
         "#address-cells":
           const: 0
+  - not:
+      required:
+        - fifo-depth
+        - rx-fifo-depth
+  - not:
+      required:
+        - fifo-depth
+        - tx-fifo-depth
 
 additionalProperties: true