dt-bindings: serial: mxs: Fix compatible list

From: Fabio Estevam <[email protected]>

imx23 and imx28 are SoCs from the same family (mxs) and they share the same AUART block, so the same programming model.

imx23 is the first member of this family. It had an AUART DMA erratum. imx28 is the second member of this family and has this erratum fixed.

imx28.dtsi uses the following description:

compatible = "fsl,imx28-auart", "fsl,imx23-auart";

Make it valid so that the following schema warning could be avoided:

imx28-apx4devkit.dtb: serial@8006a000: compatible: ['fsl,imx28-auart', 'fsl,imx23-auart'] is too long
from schema $id: http://devicetree.org/schemas/serial/fsl-mxs-auart.yaml#

---
Changes since v1:
- Improve the commit log to indicate that imx28 AUART is compatible with imx23.
- Collected Conor's Acked=by tag.

 .../devicetree/bindings/serial/fsl-mxs-auart.yaml   | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

index 6a400a5e6fc7..da032effffe6 100644
@@ -14,10 +14,13 @@ allOf:
 
 properties:
   compatible:
-    enum:
-      - fsl,imx23-auart
-      - fsl,imx28-auart
-      - alphascale,asm9260-auart
+    oneOf:
+      - const: fsl,imx23-auart
+      - const: alphascale,asm9260-auart
+      - items:
+          - enum:
+              - fsl,imx28-auart
+          - const: fsl,imx23-auart
 
   reg:
     maxItems: 1

@@ -82,7 +85,7 @@ examples:
     };
 
     auart0: serial@8006a000 {
-        compatible = "fsl,imx28-auart";
+        compatible = "fsl,imx28-auart", "fsl,imx23-auart";
         reg = <0x8006a000 0x2000>;
         interrupts = <112>;
         dmas = <&dma_apbx 8>, <&dma_apbx 9>;

2.34.1