dt-bindings: mxsfb: Document i.MX8M/i.MX6SX/i.MX6SL power-domains property

The power-domains property is mandatory on i.MX8M Mini, Nano, Plus
and i.MX6SX, i.MX6SL. Document the property and mark it as required
on the aforementioned variants of the IP, present in those SoCs.

Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Liu Ying <victor.liu@nxp.com>
Link: https://lore.kernel.org/r/20221213132006.6446-1-marex@denx.de
Signed-off-by: Rob Herring <robh@kernel.org>

diff --git a/Documentation/devicetree/bindings/display/fsl,lcdif.yaml b/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
index f449cfc..75b4efd 100644 (file)
--- a/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
+++ b/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
@@ -99,7 +99,6 @@ allOf:
           maxItems: 3
       required:
         - clock-names
-        - power-domains
   - if:
       not:
         properties:
@@ -114,6 +113,19 @@ allOf:
           maxItems: 1
         clock-names:
           maxItems: 1
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx6sl-lcdif
+              - fsl,imx6sx-lcdif
+              - fsl,imx8mm-lcdif
+              - fsl,imx8mn-lcdif
+              - fsl,imx8mp-lcdif
+    then:
+      required:
+        - power-domains
 
 examples:
   - |
@@ -128,6 +140,7 @@ examples:
                  <&clks IMX6SX_CLK_LCDIF_APB>,
                  <&clks IMX6SX_CLK_DISPLAY_AXI>;
         clock-names = "pix", "axi", "disp_axi";
+        power-domains = <&pd_disp>;
 
         port {
             endpoint {