diff --git a/arch/arm/src/sam34/sam_gpio.c b/arch/arm/src/sam34/sam_gpio.c
index 38cf99f38e0..5fda366fe00 100644
--- a/arch/arm/src/sam34/sam_gpio.c
+++ b/arch/arm/src/sam34/sam_gpio.c
@@ -118,6 +118,7 @@ static inline int sam_gpiopin(gpio_pinset_t cfgset)
  *     - If glitch filtering is enabled
  *     - If necessary to read the input value on an open drain output (this
  *       may be done in TWI logic to detect hangs on the I2C bus).
+ *     - If necessary to read the input value on peripheral pins.
  *
  ****************************************************************************/
 
diff --git a/libc/stdio/lib_sscanf.c b/libc/stdio/lib_sscanf.c
index cc671453066..ae8774cc57e 100644
--- a/libc/stdio/lib_sscanf.c
+++ b/libc/stdio/lib_sscanf.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * libc/stdio/lib_sscanf.c
  *
- *   Copyright (C) 2007, 2008, 2011-2014 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007, 2008, 2011-2014, 2016 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -64,14 +64,6 @@
 #  define MAX(a,b) (((a) > (b)) ? (a) : (b))
 #endif
 
-/****************************************************************************
- * Private Type Declarations
- ****************************************************************************/
-
-/****************************************************************************
- * Private Function Prototypes
- ****************************************************************************/
-
 /****************************************************************************
  * Public Function Prototypes
  ****************************************************************************/
@@ -79,15 +71,7 @@
 int vsscanf(FAR const char *buf, FAR const char *fmt, va_list ap);
 
 /****************************************************************************
- * Public Constant Data
- ****************************************************************************/
-
-/****************************************************************************
- * Public Data
- ****************************************************************************/
-
-/****************************************************************************
- * Private Constant Data
+ * Private Data
  ****************************************************************************/
 
 static const char spaces[] = " \t\n\r\f\v";
@@ -151,7 +135,7 @@ static int findwidth(FAR const char *buf, FAR const char *fmt)
 }
 
 /****************************************************************************
- * Private Data
+ * Public Functions
  ****************************************************************************/
 
 /****************************************************************************