[PATCH 2/2] dt-bindings: serial: pl011: Avoid matching device tree nodes of variant pl011 drivers

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There is a variant driver of pl011, which may have a compatible string
written as: "arm,sbsa-uart", "arm,pl011". Because it contains "arm,pl011",
so the corresponding device tree nodes are also checked by this YAML file.
As a result, many flase warnings similar to the following are reported:

arch/arm64/boot/dts/freescale/fsl-lx2160a-clearfog-cx.dt.yaml:
 serial@21c0000: compatible:0: 'arm,pl011' was expected
 serial@21c0000: compatible:1: 'arm,primecell' was expected

Change to only check the device tree nodes that are matched exactly.

Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx>
---
 Documentation/devicetree/bindings/serial/pl011.yaml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/serial/pl011.yaml b/Documentation/devicetree/bindings/serial/pl011.yaml
index 5ea00f8a283d..3683e4567645 100644
--- a/Documentation/devicetree/bindings/serial/pl011.yaml
+++ b/Documentation/devicetree/bindings/serial/pl011.yaml
@@ -16,9 +16,9 @@ allOf:
 select:
   properties:
     compatible:
-      contains:
-        enum:
-          - arm,pl011
+      items:
+        - const: arm,pl011
+        - const: arm,primecell
   required:
     - compatible
 
-- 
2.21.1





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