[PATCH v2 1/1] dt-bindings: lcdif: Fix constraints for imx8mp

[Alexander Stein <alexander.stein@ew.tq-group.com>]

i.MX8MP uses 3 clocks, so soften the restrictions for clocks & clock-names.
This SoC requires a power-domain for this peripheral to use. Add it as
a required property.

Fixes: f5419cb0743f ("dt-bindings: lcdif: Add compatible for i.MX8MP")
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
---
Changes in v2:
* Squash both patches into one
* Split the conditionals from fsl,imx6sx-lcdif
* Mark power-domains as required for fsl,imx8mp-lcdif
* Ignored the A-b & R-b due to reorganization

I'm not sure if this is the best way to add the constraints. I noticed that
imx6sx also uses a power-domain, but imx6ul which is compatible to imx6sx does
not, so they can't be merged.

I also have noticed that dtbs_check doesn't raise a warning when
power-domains is actually missing.

 .../bindings/display/fsl,lcdif.yaml           | 31 ++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/fsl,lcdif.yaml b/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
index 876015a44a1e6..24014651f7dc8 100644
--- a/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
+++ b/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
@@ -52,6 +52,9 @@ properties:
   interrupts:
     maxItems: 1
 
+  power-domains:
+    maxItems: 1
+
   port:
     $ref: /schemas/graph.yaml#/properties/port
     description: The LCDIF output port
@@ -81,7 +84,33 @@ allOf:
           maxItems: 3
       required:
         - clock-names
-    else:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: fsl,imx8mp-lcdif
+    then:
+      properties:
+        clocks:
+          minItems: 3
+          maxItems: 3
+        clock-names:
+          minItems: 3
+          maxItems: 3
+        power-domains:
+          minItems: 1
+      required:
+        - clock-names
+        - power-domains
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - fsl,imx6sx-lcdif
+                - fsl,imx8mp-lcdif
+    then:
       properties:
         clocks:
           maxItems: 1
-- 
2.34.1