diff --git a/arch/arm/src/cxd56xx/cxd56_udmac.c b/arch/arm/src/cxd56xx/cxd56_udmac.c
index 258b4bdeeab..258c50a3f5d 100644
--- a/arch/arm/src/cxd56xx/cxd56_udmac.c
+++ b/arch/arm/src/cxd56xx/cxd56_udmac.c
@@ -305,7 +305,7 @@ DMA_HANDLE cxd56_udmachannel(void)
   unsigned int ch;
   uint32_t bit;
 
-  /* Take a count from from the channel counting semaphore.  We may block
+  /* Take a count from the channel counting semaphore.  We may block
    * if there are no free channels.  When we get the count, then we can
    * be assured that a channel is available in the channel list and is
    * reserved for us.
diff --git a/arch/arm/src/efm32/efm32_dma.c b/arch/arm/src/efm32/efm32_dma.c
index 6d8e2380750..8bb9cb72ddb 100644
--- a/arch/arm/src/efm32/efm32_dma.c
+++ b/arch/arm/src/efm32/efm32_dma.c
@@ -338,7 +338,7 @@ DMA_HANDLE efm32_dmachannel(void)
   unsigned int chndx;
   uint32_t bit;
 
-  /* Take a count from from the channel counting semaphore.  We may block
+  /* Take a count from the channel counting semaphore.  We may block
    * if there are no free channels.  When we get the count, then we can
    * be assured that a channel is available in the channel list and is
    * reserved for us.
diff --git a/arch/arm/src/lpc43xx/lpc43_adc.c b/arch/arm/src/lpc43xx/lpc43_adc.c
index bcb3db15090..921364d6a97 100644
--- a/arch/arm/src/lpc43xx/lpc43_adc.c
+++ b/arch/arm/src/lpc43xx/lpc43_adc.c
@@ -4,7 +4,7 @@
  *   Copyright(C) 2012, 2016 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
- * Ported from from the LPC17 version:
+ * Ported from the LPC17 version:
  *
  *   Copyright(C) 2011 Li Zhuoyi. All rights reserved.
  *   Copyright(C) 2016 Gregory Nutt. All rights reserved.
diff --git a/arch/arm/src/lpc43xx/lpc43_dac.c b/arch/arm/src/lpc43xx/lpc43_dac.c
index 6c354c7a084..582c8f69cf6 100644
--- a/arch/arm/src/lpc43xx/lpc43_dac.c
+++ b/arch/arm/src/lpc43xx/lpc43_dac.c
@@ -4,7 +4,7 @@
  *   Copyright (C) 2012, 2016 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
- * Ported from from the LPC17 version:
+ * Ported from the LPC17 version:
  *
  *   Copyright (C) 2011 Li Zhuoyi. All rights reserved.
  *   Author: Li Zhuoyi <lzyy.cn@gmail.com>
diff --git a/arch/arm/src/lpc43xx/lpc43_i2c.c b/arch/arm/src/lpc43xx/lpc43_i2c.c
index 64d00852c66..a16f5e8f404 100644
--- a/arch/arm/src/lpc43xx/lpc43_i2c.c
+++ b/arch/arm/src/lpc43xx/lpc43_i2c.c
@@ -4,7 +4,7 @@
  *   Copyright (C) 2012, 2014-2016 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
- * Ported from from the LPC17 version:
+ * Ported from the LPC17 version:
  *
  *   Copyright (C) 2011 Li Zhuoyi. All rights reserved.
  *   Author: Li Zhuoyi <lzyy.cn@gmail.com>
diff --git a/arch/arm/src/sama5/Kconfig b/arch/arm/src/sama5/Kconfig
index c47530959b5..fd8245624d9 100644
--- a/arch/arm/src/sama5/Kconfig
+++ b/arch/arm/src/sama5/Kconfig
@@ -3952,7 +3952,7 @@ config SAMA5_PWM_CLKA_FREQUENCY
 	depends on SAMA5_PWM_CLKA
 	---help---
 		If the CLKA source is enabled, then you must also provide the
-		frequency of the CLKA.  This frequency will be derived from from MCK
+		frequency of the CLKA.  This frequency will be derived from MCK
 		using a prescaler and divider.  Therefore, a wide range of
 		frequencies are possible.
 
@@ -3968,7 +3968,7 @@ config SAMA5_PWM_CLKB_FREQUENCY
 	depends on SAMA5_PWM_CLKB
 	---help---
 		If the CLKB source is enabled, then you must also provide the
-		frequency of the CLKB.  This frequency will be derived from from MCK
+		frequency of the CLKB.  This frequency will be derived from MCK
 		using a prescaler and divider.  Therefore, a wide range of
 		frequencies are possible.
 
diff --git a/graphics/vnc/server/vnc_negotiate.c b/graphics/vnc/server/vnc_negotiate.c
index beaad4e70ce..097f3f4bf16 100644
--- a/graphics/vnc/server/vnc_negotiate.c
+++ b/graphics/vnc/server/vnc_negotiate.c
@@ -461,7 +461,7 @@ int vnc_negotiate(FAR struct vnc_session_s *session)
  *
  * Input Parameters:
  *   session - An instance of the session structure.
- *   pixelfmt - The pixel from from the received SetPixelFormat message
+ *   pixelfmt - The pixel from the received SetPixelFormat message
  *
  * Returned Value:
  *   Returns zero (OK) on success; a negated errno value on failure.
diff --git a/graphics/vnc/server/vnc_server.h b/graphics/vnc/server/vnc_server.h
index 6bfc686d691..3bf5216d678 100644
--- a/graphics/vnc/server/vnc_server.h
+++ b/graphics/vnc/server/vnc_server.h
@@ -371,7 +371,7 @@ int vnc_negotiate(FAR struct vnc_session_s *session);
  *
  * Input Parameters:
  *   session - An instance of the session structure.
- *   pixelfmt - The pixel from from the received SetPixelFormat message
+ *   pixelfmt - The pixel from the received SetPixelFormat message
  *
  * Returned Value:
  *   Returns zero (OK) on success; a negated errno value on failure.