[PATCH v4 1/1] dt-bindings: fsl-qdma: allow compatible string fallback to fsl,ls1021a-qdma

[Frank Li]

The IP of QDMA ls1028/ls1043/ls1046/ is same as ls1021. So allow compatible
string fallback to fsl,ls1021a-qdma.

The difference is that ls1021a-qdma have 3 irqs, and other have 5 irqs.

Fix below CHECK_DTB warning.
arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dtb: dma-controller@8380000: compatible: ['fsl,ls1046a-qdma', 'fsl,ls1021a-qdma'] is too long

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
---
Change from v3 to v4
- rebase to dmaengine/next
- Add Kryzy's review tag
Change from v2 to v3
- previous patch missed a dependent change.
 https://lore.kernel.org/imx/20240701195717.1843041-1-Frank.Li@xxxxxxx/T/#u
- Combine depedent change to one patch.

Change from v1 to v2
- Change  maxItems: 5 to minItems: 5. because maxItems: 5 already restrict
at top

interrupts:
    minItems: 2
    maxItems: 5
---
---
 Documentation/devicetree/bindings/dma/fsl-qdma.yaml | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/dma/fsl-qdma.yaml b/Documentation/devicetree/bindings/dma/fsl-qdma.yaml
index 1b9ebdbe528a1..9401b1f6300d4 100644
--- a/Documentation/devicetree/bindings/dma/fsl-qdma.yaml
+++ b/Documentation/devicetree/bindings/dma/fsl-qdma.yaml
@@ -11,11 +11,14 @@ maintainers:
 
 properties:
   compatible:
-    enum:
-      - fsl,ls1021a-qdma
-      - fsl,ls1028a-qdma
-      - fsl,ls1043a-qdma
-      - fsl,ls1046a-qdma
+    oneOf:
+      - const: fsl,ls1021a-qdma
+      - items:
+          - enum:
+              - fsl,ls1028a-qdma
+              - fsl,ls1043a-qdma
+              - fsl,ls1046a-qdma
+          - const: fsl,ls1021a-qdma
 
   reg:
     items:
-- 
2.34.1