diff --git a/src/drivers/device/CMakeLists.txt b/src/drivers/device/CMakeLists.txt
index 95df2d1855..872e4c682d 100644
--- a/src/drivers/device/CMakeLists.txt
+++ b/src/drivers/device/CMakeLists.txt
@@ -44,7 +44,6 @@ if(${OS} STREQUAL "nuttx")
 			device_nuttx.cpp
 			cdev.cpp
 			i2c_nuttx.cpp
-			pio.cpp
 			spi.cpp
 		)
 	endif()
diff --git a/src/drivers/device/device_nuttx.h b/src/drivers/device/device_nuttx.h
index dcbb65ac5f..166e172943 100644
--- a/src/drivers/device/device_nuttx.h
+++ b/src/drivers/device/device_nuttx.h
@@ -506,72 +506,6 @@ private:
 	CDev operator=(const CDev &);
 };
 
-/**
- * Abstract class for character device accessed via PIO
- */
-class __EXPORT PIO : public CDev
-{
-public:
-	/**
-	 * Constructor
-	 *
-	 * @param name		Driver name
-	 * @param devname	Device node name
-	 * @param base		Base address of the device PIO area
-	 * @param irq		Interrupt assigned to the device (or zero if none)
-	 */
-	PIO(const char *name,
-	    const char *devname,
-	    uint32_t base,
-	    int irq = 0);
-	virtual ~PIO();
-
-	virtual int	init();
-
-protected:
-
-	/**
-	 * Read a register
-	 *
-	 * @param offset	Register offset in bytes from the base address.
-	 */
-	uint32_t	reg(uint32_t offset)
-	{
-		return *(volatile uint32_t *)(_base + offset);
-	}
-
-	/**
-	 * Write a register
-	 *
-	 * @param offset	Register offset in bytes from the base address.
-	 * @param value	Value to write.
-	 */
-	void		reg(uint32_t offset, uint32_t value)
-	{
-		*(volatile uint32_t *)(_base + offset) = value;
-	}
-
-	/**
-	 * Modify a register
-	 *
-	 * Note that there is a risk of a race during the read/modify/write cycle
-	 * that must be taken care of by the caller.
-	 *
-	 * @param offset	Register offset in bytes from the base address.
-	 * @param clearbits	Bits to clear in the register
-	 * @param setbits	Bits to set in the register
-	 */
-	void		modify(uint32_t offset, uint32_t clearbits, uint32_t setbits)
-	{
-		uint32_t val = reg(offset);
-		val &= ~clearbits;
-		val |= setbits;
-		reg(offset, val);
-	}
-
-private:
-	uint32_t	_base;
-};
 
 } // namespace device
 
diff --git a/src/drivers/device/pio.cpp b/src/drivers/device/pio.cpp
deleted file mode 100644
index f3a805a5e6..0000000000
--- a/src/drivers/device/pio.cpp
+++ /dev/null
@@ -1,74 +0,0 @@
-/****************************************************************************
- *
- *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 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 PX4 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.
- *
- ****************************************************************************/
-
-/**
- * @file pio.cpp
- *
- * Base class for devices accessed via PIO to registers.
- */
-
-#include "device.h"
-
-namespace device
-{
-
-PIO::PIO(const char *name,
-	 const char *devname,
-	 uint32_t base,
-	 int irq) :
-	// base class
-	CDev(name, devname, irq),
-	// public
-	// protected
-	// private
-	_base(base)
-{
-}
-
-PIO::~PIO()
-{
-	// nothing to do here...
-}
-
-int
-PIO::init()
-{
-	int ret = OK;
-
-	// base class init first
-	ret = CDev::init();
-
-	return ret;
-}
-
-} // namespace device
\ No newline at end of file