diff --git a/include/linux/platform_data/mlxreg.h b/include/linux/platform_data/mlxreg.h
index b8da8aef24464fdcea202f9cb20f5393e32a8a11..a2adc3ad45f2f528d56ccde82e8585c7d576c1bf 100644
--- a/include/linux/platform_data/mlxreg.h
+++ b/include/linux/platform_data/mlxreg.h
@@ -80,6 +80,7 @@ struct mlxreg_hotplug_device {
  * @hpdev - hotplug device data;
  * @health_cntr: dynamic device health indication counter;
  * @attached: true if device has been attached after good health indication;
+ * @regnum: number of registers occupied by multi-register attribute;
  */
 struct mlxreg_core_data {
 	char label[MLXREG_CORE_LABEL_MAX_SIZE];
@@ -92,6 +93,7 @@ struct mlxreg_core_data {
 	struct mlxreg_hotplug_device hpdev;
 	u8 health_cntr;
 	bool attached;
+	u8 regnum;
 };
 
 /**