diff --git a/drivers/power/battery/battery_charger.c b/drivers/power/battery/battery_charger.c
index f0fff70ecad..d01292b51a9 100644
--- a/drivers/power/battery/battery_charger.c
+++ b/drivers/power/battery/battery_charger.c
@@ -391,7 +391,15 @@ static int bat_charger_ioctl(FAR struct file *filep, int cmd,
           FAR int *ptr = (FAR int *)((uintptr_t)arg);
           if (ptr)
             {
-              ret = dev->ops->get_protocol(dev, ptr);
+              if (dev->ops->get_protocol)
+                {
+                  ret = dev->ops->get_protocol(dev, ptr);
+                }
+              else
+                {
+                  *ptr = BATTERY_PROTOCOL_DEFAULT;
+                  ret = OK;
+                }
             }
         }
         break;
diff --git a/include/nuttx/power/battery_ioctl.h b/include/nuttx/power/battery_ioctl.h
index 2f784628bf1..45dc694daa2 100644
--- a/include/nuttx/power/battery_ioctl.h
+++ b/include/nuttx/power/battery_ioctl.h
@@ -116,6 +116,7 @@ enum battery_health_e
 
 enum battery_protocol_e
 {
+  BATTERY_PROTOCOL_DEFAULT = 0,         /* Battery charge protocol of adapter is DEFAULT */
   BATTERY_PROTOCOL_QC3P0 = 1 << 0,      /* Battery charge protocol of adapter is QC 3.0 */
   BATTERY_PROTOCOL_TX_XIAOMI = 1 << 1,  /* Battery charge protocol of TX is xiaomi standard */
 };