[PATCH 2/3] dt-bindings: Add dma-channels for pdma device node

[Zong Li]

Add dma-channels property, then we can determine how many channels there
by device tree, rather than statically defines it in PDMA driver

Signed-off-by: Zong Li <zong.li at sifive.com>
---
 .../devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml     | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
index d32a71b975fe..256bcb111d57 100644
--- a/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
+++ b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
@@ -34,12 +34,17 @@ properties:
     minItems: 1
     maxItems: 8
 
+  dma-channels:
+    minimum: 1
+    maximum: 4
+
   '#dma-cells':
     const: 1
 
 required:
   - compatible
   - reg
+  - dma-channels
   - interrupts
   - '#dma-cells'
 
@@ -50,6 +55,7 @@ examples:
     dma at 3000000 {
       compatible = "sifive,fu540-c000-pdma";
       reg = <0x3000000 0x8000>;
+      dma-channels = <4>;
       interrupts = <23 24 25 26 27 28 29 30>;
       #dma-cells = <1>;
     };
-- 
2.31.1