.... uint32_t size parameters to pass to wdentry
+
+
+NOTE: All parameters must be of type wdparm_t.
+
diff --git a/include/nuttx/wdog.h b/include/nuttx/wdog.h
index b736ef09c52..d222c4da932 100644
--- a/include/nuttx/wdog.h
+++ b/include/nuttx/wdog.h
@@ -1,36 +1,20 @@
/****************************************************************************
* include/nuttx/wdog.h
*
- * Copyright (C) 2007-2009, 2014-2015, 2018 Gregory Nutt. All rights
- * reserved.
- * Author: Gregory Nutt
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
+ * http://www.apache.org/licenses/LICENSE-2.0
*
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
*
****************************************************************************/
@@ -229,10 +213,12 @@ int wd_delete(WDOG_ID wdog);
* on a given watchdog ID has any effect.
*
* Input Parameters:
- * wdog - watchdog ID
+ * wdog - Watchdog ID
* delay - Delay count in clock ticks
- * wdentry - function to call on timeout
- * parm1..4 - parameters to pass to wdentry
+ * wdentry - Function to call on timeout
+ * parm1..4 - Parameters to pass to wdentry.
+ *
+ * NOTE: All parameters must be of type wdparm_t.
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is return to
diff --git a/sched/wdog/wd_start.c b/sched/wdog/wd_start.c
index 29f7a4b7953..cf9cb27cede 100644
--- a/sched/wdog/wd_start.c
+++ b/sched/wdog/wd_start.c
@@ -151,10 +151,12 @@ static inline void wd_expiration(void)
* on a given watchdog ID has any effect.
*
* Input Parameters:
- * wdog - watchdog ID
+ * wdog - Watchdog ID
* delay - Delay count in clock ticks
- * wdentry - function to call on timeout
- * parm1..4 - parameters to pass to wdentry
+ * wdentry - Function to call on timeout
+ * parm1..4 - Parameters to pass to wdentry
+ *
+ * NOTE: All parameters must be of type wdparm_t.
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is return to