SAM4S Xplained Pro: Add USB suspend/resume hook. From Bob Doison

configs/sam4s-xplained-pro/src/Makefile

@@ -54,6 +54,10 @@ ifeq ($(CONFIG_SAM34_HSMCI),y)
 CSRCS += sam_hsmci.c
 endif
 
+ifeq ($(CONFIG_SAM34_UDP),y)
+CSRCS += sam_udp.c
+endif
+
 ifeq ($(CONFIG_ARCH_LEDS),y)
 CSRCS += sam_autoleds.c
 else

configs/sam4s-xplained-pro/src/sam_udp.c

+/************************************************************************************
+ * configs/sam4s-xplained-pro/src/sam_udp.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 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.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+
+#include <nuttx/usb/usbdev.h>
+#include <nuttx/usb/usbdev_trace.h>
+
+#include "up_arch.h"
+#include "sam4s-xplained-pro.h"
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name:  sam_udp_suspend
+ *
+ * Description:
+ *   Board logic must provide the sam_udp_suspend logic if the UDP driver is
+ *   used.  This function is called whenever the USB enters or leaves suspend mode.
+ *
+ *   When 'resume' is false, this function call provides an opportunity to perform
+ *   board-specific power-saving actions so that less power is consumed while the
+ *   USB is suspended.
+ *
+ *   Certain power-saving operations are performed by the UDP driver when it enters
+ *   suspend mode:  The USB device peripheral clocks are be switched off.  MCK and
+ *   UDPCK are switched off and the USB transceiver is disabled.
+ *
+ *   When 'resume' is true, normal clocking and operations must all be restored.
+ *
+ ************************************************************************************/
+
+void sam_udp_suspend(FAR struct usbdev_s *dev, bool resume)
+{
+  ulldbg("resume: %d\n", resume);
+}