Document CPU Control Processor (CPUCP) mailbox controller for Qualcomm
Glymur SoCs. It is software compatible with X1E80100 CPUCP mailbox
controller hence fallback to it.

Signed-off-by: Sibi Sankar <sibi.sankar@oss.qualcomm.com>
---
 .../devicetree/bindings/mailbox/qcom,cpucp-mbox.yaml     | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/mailbox/qcom,cpucp-mbox.yaml b/Documentation/devicetree/bindings/mailbox/qcom,cpucp-mbox.yaml
index f7342d04beec..9122c3d2dc30 100644
--- a/Documentation/devicetree/bindings/mailbox/qcom,cpucp-mbox.yaml
+++ b/Documentation/devicetree/bindings/mailbox/qcom,cpucp-mbox.yaml
@@ -15,8 +15,13 @@ description:
 
 properties:
   compatible:
-    items:
-      - const: qcom,x1e80100-cpucp-mbox
+    oneOf:
+      - items:
+          - enum:
+              - qcom,glymur-cpucp-mbox
+          - const: qcom,x1e80100-cpucp-mbox
+      - enum:
+          - qcom,x1e80100-cpucp-mbox
 
   reg:
     items:
-- 
2.34.1