diff --git a/Bindings/memory-controllers/nvidia,tegra20-emc.yaml b/Bindings/memory-controllers/nvidia,tegra20-emc.yaml
index f54e553..71896cb 100644
--- a/Bindings/memory-controllers/nvidia,tegra20-emc.yaml
+++ b/Bindings/memory-controllers/nvidia,tegra20-emc.yaml
@@ -145,7 +145,7 @@
   "^emc-table@[0-9]+$":
     $ref: "#/$defs/emc-table"
 
-  "^emc-tables@[a-z0-9-]+$":
+  "^emc-tables@[a-f0-9-]+$":
     type: object
     properties:
       reg: