SAMA5D4-EK: Add a configuration to load a boot program into AT25 FLASH

9 files changed, 1458 insertions, 25 deletions

diff --git a/nuttx/configs/sama5d4-ek/Kconfig b/nuttx/configs/sama5d4-ek/Kconfig
index de0141c8a..5c4ae21d8 100644
--- a/nuttx/configs/sama5d4-ek/Kconfig
+++ b/nuttx/configs/sama5d4-ek/Kconfig
@@ -63,10 +63,34 @@ config SAMA5D4EK_DRAM_START
 		SAMA5D4EK_DRAM_START is defined, then it will not wait but will,
 		instead, immediately start the program in DRAM.
 
+config SAMA5D4EK_AT25_MAIN
+	bool "Build at25_main"
+	default n
+	depends on SAMA5_BOOT_ISRAM
+	---help---
+		at25_main is a tiny program that runs in ISRAM.  at25_main will
+		enable SDRAM and configure the AT25 Serial FLASH.  It will prompt
+		and then load an Intel HEX program into SDRAM over the serial
+		console. If the program is successfully loaded in SDRAM, at25_main
+		will copy the program at the beginning of the AT26 Serial FLASH.
+		If the jumpering is set correctly, the SAMA5D4 RomBOOT loader will
+		then boot the program from the serial FLASH the next time that it
+		reset.
+
+config SAMA5D4EK_AT25_PROGSIZE
+	int "AT25 partition size"
+	default 131072
+	depends on SAMA5D4EK_AT25_MAIN
+	---help---
+		This is the size of the partition at the beginning to the AT25
+		serial FLASH that will be used to hold the boot program.  Since
+		this program must run from SRAM, there would be no purpose int
+		making this size any larger than the size of the internal SRAM.
+
 config SAMA5D4EK_DRAM_BOOT
 	bool "Using DRAM boot loader"
 	default y
-	depends on SAMA5_BOOT_SDRAM && !SAMA5D4EK_DRAM_MAIN
+	depends on SAMA5_BOOT_SDRAM && !SAMA5D4EK_DRAM_MAIN && !SAMA5D4EK_AT25_MAIN
 	---help---
 		Select this option if you are going to boot using the sdram_main
 		bootloader (created with SAMA5D4EK_DRAM_MAIN=y).  This selection
@@ -115,7 +139,7 @@ endchoice # NAND FLASH configuration
 config SAMA5D4EK_AT25_AUTOMOUNT
 	bool "AT25 serial FLASH auto-mount"
 	default n
-	depends on NSH_ARCHINIT && SAMA5_SPI0 && MTD_AT25
+	depends on (NSH_ARCHINIT || SAMA5D4EK_AT25_MAIN) && SAMA5_SPI0 && MTD_AT25
 	---help---
 		Automatically initialize the AT25 SPI FLASH driver when NSH starts.
 
@@ -132,6 +156,14 @@ config SAMA5D4EK_AT25_FTL
 		any other file system.  Any file system may be used, but there will
 		be no wear-leveling.
 
+config SAMA5D4EK_AT25_CHARDEV
+	bool "Create AT25 Serial FLASH character driver"
+	---help---
+		Create the MTD driver for the AT25 and "wrap" the AT25 as a standard
+		character driver that could then, for example, via simple open, close,
+		read, write file system operations.  There will be no wear-leveling
+		in this configuration.
+
 config SAMA5D4EK_AT25_NXFFS
 	bool "Create AT25 serial FLASH NXFFS file system"
 	depends on FS_NXFFS
diff --git a/nuttx/configs/sama5d4-ek/at25boot/Make.defs b/nuttx/configs/sama5d4-ek/at25boot/Make.defs
new file mode 100644
index 000000000..cc534bf9b
--- /dev/null
+++ b/nuttx/configs/sama5d4-ek/at25boot/Make.defs
@@ -0,0 +1,130 @@
+############################################################################
+# configs/sama5d4-ek/at25boot/Make.defs
+#
+#   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.
+#
+############################################################################
+
+include ${TOPDIR}/.config
+include ${TOPDIR}/tools/Config.mk
+include ${TOPDIR}$(DELIM)arch$(DELIM)arm$(DELIM)src$(DELIM)armv7-a$(DELIM)Toolchain.defs
+
+ifeq ($(CONFIG_SAMA5_BOOT_ISRAM),y)
+  LDSCRIPT = isram.ld
+endif
+
+ifeq ($(CONFIG_SAMA5_BOOT_SDRAM),y)
+ifeq ($(CONFIG_SAMA5D4EK_DRAM_BOOT),y)
+  LDSCRIPT = dramboot.ld
+else
+  LDSCRIPT = uboot.ld
+endif
+endif
+
+ifeq ($(WINTOOL),y)
+  # Windows-native toolchains
+  ARCHINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)$(DELIM)include}"
+  ARCHXXINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)$(DELIM)include}" -isystem "${shell cygpath -w $(TOPDIR)$(DELIM)include$(DELIM)cxx}"
+  ARCHSCRIPT = -T "${shell cygpath -w $(TOPDIR)$(DELIM)configs$(DELIM)$(CONFIG_ARCH_BOARD)$(DELIM)scripts$(DELIM)$(LDSCRIPT)}"
+else
+  # Linux/Cygwin-native toolchain
+  ARCHINCLUDES = -I. -isystem $(TOPDIR)$(DELIM)include
+  ARCHXXINCLUDES = -I. -isystem $(TOPDIR)$(DELIM)include -isystem $(TOPDIR)$(DELIM)include$(DELIM)cxx
+  ARCHSCRIPT = -T$(TOPDIR)$(DELIM)configs$(DELIM)$(CONFIG_ARCH_BOARD)$(DELIM)scripts$(DELIM)$(LDSCRIPT)
+endif
+
+CC = $(CROSSDEV)gcc
+CXX = $(CROSSDEV)g++
+CPP = $(CROSSDEV)gcc -E
+LD = $(CROSSDEV)ld
+AR = $(ARCROSSDEV)ar rcs
+NM = $(ARCROSSDEV)nm
+OBJCOPY = $(CROSSDEV)objcopy
+OBJDUMP = $(CROSSDEV)objdump
+
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  ARCHOPTIMIZATION = -g
+endif
+
+ifneq ($(CONFIG_DEBUG_NOOPT),y)
+  ARCHOPTIMIZATION += $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
+endif
+
+ARCHCPUFLAGS = -mcpu=cortex-a5 -mfpu=vfpv4-d16
+ARCHCFLAGS = -fno-builtin
+ARCHCXXFLAGS = -fno-builtin -fno-exceptions -fno-rtti
+ARCHWARNINGS = -Wall -Wstrict-prototypes -Wshadow
+ARCHWARNINGSXX = -Wall -Wshadow
+ARCHDEFINES =
+ARCHPICFLAGS = -fpic -msingle-pic-base -mpic-register=r10
+
+CFLAGS = $(ARCHCFLAGS) $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CPICFLAGS = $(ARCHPICFLAGS) $(CFLAGS)
+CXXFLAGS = $(ARCHCXXFLAGS) $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
+CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
+AFLAGS = $(CFLAGS) -D__ASSEMBLY__
+
+NXFLATLDFLAGS1 = -r -d -warn-common
+NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
+LDNXFLATFLAGS = -e main -s 2048
+
+OBJEXT = .o
+LIBEXT = .a
+EXEEXT =
+
+ifneq ($(CROSSDEV),arm-nuttx-elf-)
+  LDFLAGS += -nostartfiles -nodefaultlibs
+endif
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  LDFLAGS += -g
+endif
+
+HOSTCC = gcc
+HOSTINCLUDES = -I.
+HOSTCFLAGS = -Wall -Wstrict-prototypes -Wshadow -g -pipe
+HOSTLDFLAGS =
+ifeq ($(CONFIG_HOST_WINDOWS),y)
+  HOSTEXEEXT = .exe
+else
+  HOSTEXEEXT =
+endif
+
+ifeq ($(WINTOOL),y)
+  # Windows-native host tools
+  DIRLINK = $(TOPDIR)$(DELIM)tools$(DELIM)copydir.sh
+  DIRUNLINK = $(TOPDIR)$(DELIM)tools$(DELIM)unlink.sh
+  MKDEP = $(TOPDIR)$(DELIM)tools$(DELIM)mknulldeps.sh
+else
+  # Linux/Cygwin-native host tools
+  MKDEP = $(TOPDIR)$(DELIM)tools$(DELIM)mkdeps$(HOSTEXEEXT)
+endif
+
diff --git a/nuttx/configs/sama5d4-ek/at25boot/defconfig b/nuttx/configs/sama5d4-ek/at25boot/defconfig
new file mode 100644
index 000000000..3f7f82de1
--- /dev/null
+++ b/nuttx/configs/sama5d4-ek/at25boot/defconfig
@@ -0,0 +1,878 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Nuttx/ Configuration
+#
+
+#
+# Build Setup
+#
+# CONFIG_EXPERIMENTAL is not set
+# CONFIG_DEFAULT_SMALL is not set
+# CONFIG_HOST_LINUX is not set
+# CONFIG_HOST_OSX is not set
+CONFIG_HOST_WINDOWS=y
+# CONFIG_HOST_OTHER is not set
+# CONFIG_WINDOWS_NATIVE is not set
+CONFIG_WINDOWS_CYGWIN=y
+# CONFIG_WINDOWS_MSYS is not set
+# CONFIG_WINDOWS_OTHER is not set
+
+#
+# Build Configuration
+#
+# CONFIG_APPS_DIR="../apps"
+# CONFIG_BUILD_2PASS is not set
+
+#
+# Binary Output Formats
+#
+# CONFIG_RRLOAD_BINARY is not set
+CONFIG_INTELHEX_BINARY=y
+# CONFIG_MOTOROLA_SREC is not set
+CONFIG_RAW_BINARY=y
+# CONFIG_UBOOT_UIMAGE is not set
+
+#
+# Customize Header Files
+#
+# CONFIG_ARCH_STDINT_H is not set
+# CONFIG_ARCH_STDBOOL_H is not set
+# CONFIG_ARCH_MATH_H is not set
+# CONFIG_ARCH_FLOAT_H is not set
+# CONFIG_ARCH_STDARG_H is not set
+
+#
+# Debug Options
+#
+# CONFIG_DEBUG is not set
+CONFIG_ARCH_HAVE_STACKCHECK=y
+# CONFIG_ARCH_HAVE_HEAPCHECK is not set
+# CONFIG_DEBUG_SYMBOLS is not set
+CONFIG_ARCH_HAVE_CUSTOMOPT=y
+# CONFIG_DEBUG_NOOPT is not set
+# CONFIG_DEBUG_CUSTOMOPT is not set
+CONFIG_DEBUG_FULLOPT=y
+
+#
+# System Type
+#
+# CONFIG_ARCH_8051 is not set
+CONFIG_ARCH_ARM=y
+# CONFIG_ARCH_AVR is not set
+# CONFIG_ARCH_HC is not set
+# CONFIG_ARCH_MIPS is not set
+# CONFIG_ARCH_RGMP is not set
+# CONFIG_ARCH_SH is not set
+# CONFIG_ARCH_SIM is not set
+# CONFIG_ARCH_X86 is not set
+# CONFIG_ARCH_Z16 is not set
+# CONFIG_ARCH_Z80 is not set
+CONFIG_ARCH="arm"
+
+#
+# ARM Options
+#
+# CONFIG_ARCH_CHIP_A1X is not set
+# CONFIG_ARCH_CHIP_C5471 is not set
+# CONFIG_ARCH_CHIP_CALYPSO is not set
+# CONFIG_ARCH_CHIP_DM320 is not set
+# CONFIG_ARCH_CHIP_IMX is not set
+# CONFIG_ARCH_CHIP_KINETIS is not set
+# CONFIG_ARCH_CHIP_KL is not set
+# CONFIG_ARCH_CHIP_LM is not set
+# CONFIG_ARCH_CHIP_TIVA is not set
+# CONFIG_ARCH_CHIP_LPC17XX is not set
+# CONFIG_ARCH_CHIP_LPC214X is not set
+# CONFIG_ARCH_CHIP_LPC2378 is not set
+# CONFIG_ARCH_CHIP_LPC31XX is not set
+# CONFIG_ARCH_CHIP_LPC43XX is not set
+# CONFIG_ARCH_CHIP_NUC1XX is not set
+CONFIG_ARCH_CHIP_SAMA5=y
+# CONFIG_ARCH_CHIP_SAMD is not set
+# CONFIG_ARCH_CHIP_SAM34 is not set
+# CONFIG_ARCH_CHIP_STM32 is not set
+# CONFIG_ARCH_CHIP_STR71X is not set
+# CONFIG_ARCH_ARM7TDMI is not set
+# CONFIG_ARCH_ARM926EJS is not set
+# CONFIG_ARCH_ARM920T is not set
+# CONFIG_ARCH_CORTEXM0 is not set
+# CONFIG_ARCH_CORTEXM3 is not set
+# CONFIG_ARCH_CORTEXM4 is not set
+CONFIG_ARCH_CORTEXA5=y
+# CONFIG_ARCH_CORTEXA8 is not set
+CONFIG_ARCH_FAMILY="armv7-a"
+CONFIG_ARCH_CHIP="sama5"
+CONFIG_ARCH_HAVE_FPU=y
+CONFIG_ARCH_FPU=y
+# CONFIG_ARCH_HAVE_MPU is not set
+CONFIG_ARCH_HAVE_LOWVECTORS=y
+CONFIG_ARCH_LOWVECTORS=y
+# CONFIG_ARCH_ROMPGTABLE is not set
+
+#
+# ARMv7-A Configuration Options
+#
+# CONFIG_ARMV7A_TOOLCHAIN_BUILDROOT is not set
+CONFIG_ARMV7A_TOOLCHAIN_CODESOURCERYW=y
+# CONFIG_ARMV7A_TOOLCHAIN_DEVKITARM is not set
+# CONFIG_ARMV7A_TOOLCHAIN_GNU_EABIL is not set
+# CONFIG_ARMV7A_TOOLCHAIN_GNU_EABIW is not set
+# CONFIG_ARMV7A_TOOLCHAIN_GNU_OABI is not set
+# CONFIG_ARMV7A_DECODEFIQ is not set
+
+#
+# SAMA5 Configuration Options
+#
+CONFIG_SAMA5_HAVE_AESB=y
+CONFIG_SAMA5_HAVE_ICM=y
+CONFIG_SAMA5_HAVE_UART0=y
+CONFIG_SAMA5_HAVE_UART1=y
+CONFIG_SAMA5_HAVE_USART4=y
+# CONFIG_SAMA5_HAVE_CAN0 is not set
+# CONFIG_SAMA5_HAVE_CAN1 is not set
+# CONFIG_SAMA5_HAVE_DMA is not set
+CONFIG_SAMA5_HAVE_DDR32=y
+CONFIG_SAMA5_HAVE_XDMA=y
+CONFIG_SAMA5_HAVE_L2CC=y
+CONFIG_SAMA5_HAVE_LCDC=y
+# CONFIG_SAMA5_HAVE_GMAC is not set
+# CONFIG_SAMA5_HAVE_EMACA is not set
+CONFIG_SAMA5_HAVE_EMACB=y
+CONFIG_SAMA5_HAVE_EMAC1=y
+# CONFIG_SAMA5_HAVE_HSMCI2 is not set
+CONFIG_SAMA5_HAVE_SAIC=y
+CONFIG_SAMA5_HAVE_SBM=y
+CONFIG_SAMA5_HAVE_SFC=y
+CONFIG_SAMA5_HAVE_SPI2=y
+CONFIG_SAMA5_HAVE_TC1=y
+CONFIG_SAMA5_HAVE_TC2=y
+CONFIG_SAMA5_HAVE_TRUSTZONE=y
+CONFIG_SAMA5_HAVE_TWI3=y
+CONFIG_SAMA5_HAVE_VDEC=y
+# CONFIG_ARCH_CHIP_SAMA5D3 is not set
+CONFIG_ARCH_CHIP_SAMA5D4=y
+# CONFIG_ARCH_CHIP_ATSAMA5D31 is not set
+# CONFIG_ARCH_CHIP_ATSAMA5D33 is not set
+# CONFIG_ARCH_CHIP_ATSAMA5D34 is not set
+# CONFIG_ARCH_CHIP_ATSAMA5D35 is not set
+# CONFIG_ARCH_CHIP_ATSAMA5D36 is not set
+# CONFIG_ARCH_CHIP_ATSAMA5D41 is not set
+# CONFIG_ARCH_CHIP_ATSAMA5D42 is not set
+# CONFIG_ARCH_CHIP_ATSAMA5D43 is not set
+CONFIG_ARCH_CHIP_ATSAMA5D44=y
+
+#
+# SAMA5 Peripheral Support
+#
+# CONFIG_SAMA5_AES is not set
+# CONFIG_SAMA5_TDES is not set
+# CONFIG_SAMA5_AESB is not set
+# CONFIG_SAMA5_DBGU is not set
+# CONFIG_SAMA5_L2CC is not set
+# CONFIG_SAMA5_PIT is not set
+# CONFIG_SAMA5_WDT is not set
+# CONFIG_SAMA5_RTC is not set
+# CONFIG_SAMA5_ICM is not set
+CONFIG_SAMA5_HSMC=y
+# CONFIG_SAMA5_SMD is not set
+# CONFIG_SAMA5_SAIC is not set
+# CONFIG_SAMA5_UART0 is not set
+# CONFIG_SAMA5_UART1 is not set
+# CONFIG_SAMA5_USART0 is not set
+# CONFIG_SAMA5_USART1 is not set
+# CONFIG_SAMA5_USART2 is not set
+CONFIG_SAMA5_USART3=y
+# CONFIG_SAMA5_USART4 is not set
+# CONFIG_SAMA5_TWI0 is not set
+# CONFIG_SAMA5_TWI1 is not set
+# CONFIG_SAMA5_TWI2 is not set
+# CONFIG_SAMA5_TWI3 is not set
+# CONFIG_SAMA5_HSMCI0 is not set
+# CONFIG_SAMA5_HSMCI1 is not set
+# CONFIG_SAMA5_SBM is not set
+# CONFIG_SAMA5_SFC is not set
+CONFIG_SAMA5_SPI0=y
+# CONFIG_SAMA5_SPI1 is not set
+# CONFIG_SAMA5_SPI2 is not set
+# CONFIG_SAMA5_TC0 is not set
+# CONFIG_SAMA5_TC1 is not set
+# CONFIG_SAMA5_TC2 is not set
+# CONFIG_SAMA5_PWM is not set
+# CONFIG_SAMA5_ADC is not set
+# CONFIG_SAMA5_XDMAC0 is not set
+# CONFIG_SAMA5_XDMAC1 is not set
+# CONFIG_SAMA5_UHPHS is not set
+# CONFIG_SAMA5_UDPHS is not set
+# CONFIG_SAMA5_EMACB is not set
+# CONFIG_SAMA5_EMAC0 is not set
+# CONFIG_SAMA5_EMAC1 is not set
+# CONFIG_SAMA5_LCDC is not set
+# CONFIG_SAMA5_ISI is not set
+# CONFIG_SAMA5_SHA is not set
+# CONFIG_SAMA5_TRNG is not set
+# CONFIG_SAMA5_ARM is not set
+# CONFIG_SAMA5_FUSE is not set
+CONFIG_SAMA5_MPDDRC=y
+# CONFIG_SAMA5_VDEC is not set
+# CONFIG_SAMA5_PIO_IRQ is not set
+
+#
+# SPI device driver options
+#
+
+#
+# External Memory Configuration
+#
+CONFIG_SAMA5_DDRCS=y
+CONFIG_SAMA5_DDRCS_SIZE=268435456
+# CONFIG_SAMA5_DDRCS_LPDDR1 is not set
+CONFIG_SAMA5_DDRCS_LPDDR2=y
+# CONFIG_SAMA5_EBICS0 is not set
+# CONFIG_SAMA5_EBICS1 is not set
+# CONFIG_SAMA5_EBICS2 is not set
+# CONFIG_SAMA5_EBICS3 is not set
+# CONFIG_SAMA5_HAVE_NAND is not set
+# CONFIG_SAMA5_HAVE_PMECC is not set
+CONFIG_SAMA5_BOOT_ISRAM=y
+# CONFIG_SAMA5_BOOT_SDRAM is not set
+
+#
+# Heap Configuration
+#
+CONFIG_SAMA5_DDRCS_HEAP=y
+CONFIG_SAMA5_DDRCS_HEAP_OFFSET=0
+CONFIG_SAMA5_DDRCS_HEAP_SIZE=0
+
+#
+# Architecture Options
+#
+# CONFIG_ARCH_NOINTC is not set
+# CONFIG_ARCH_VECNOTIRQ is not set
+# CONFIG_ARCH_DMA is not set
+CONFIG_ARCH_HAVE_IRQPRIO=y
+# CONFIG_CUSTOM_STACK is not set
+# CONFIG_ADDRENV is not set
+CONFIG_ARCH_HAVE_VFORK=y
+CONFIG_ARCH_HAVE_MMU=y
+CONFIG_ARCH_NAND_HWECC=y
+# CONFIG_ARCH_HAVE_EXTCLK is not set
+# CONFIG_PAGING is not set
+# CONFIG_ARCH_IRQPRIO is not set
+CONFIG_ARCH_STACKDUMP=y
+# CONFIG_ENDIAN_BIG is not set
+# CONFIG_ARCH_IDLE_CUSTOM is not set
+# CONFIG_ARCH_HAVE_RAMFUNCS is not set
+# CONFIG_ARCH_HAVE_RAMVECTORS is not set
+
+#
+# Board Settings
+#
+CONFIG_BOARD_LOOPSPERMSEC=65775
+# CONFIG_ARCH_CALIBRATION is not set
+
+#
+# Interrupt options
+#
+CONFIG_ARCH_HAVE_INTERRUPTSTACK=y
+CONFIG_ARCH_INTERRUPTSTACK=0
+# CONFIG_ARCH_HAVE_HIPRI_INTERRUPT is not set
+
+#
+# Boot options
+#
+# CONFIG_BOOT_RUNFROMEXTSRAM is not set
+# CONFIG_BOOT_RUNFROMFLASH is not set
+CONFIG_BOOT_RUNFROMISRAM=y
+# CONFIG_BOOT_RUNFROMSDRAM is not set
+# CONFIG_BOOT_COPYTORAM is not set
+
+#
+# Boot Memory Configuration
+#
+CONFIG_RAM_START=0x00200000
+CONFIG_RAM_VSTART=0x00200000
+CONFIG_RAM_SIZE=114688
+CONFIG_ARCH_HAVE_SDRAM=y
+CONFIG_BOOT_SDRAM_DATA=y
+
+#
+# Board Selection
+#
+CONFIG_ARCH_BOARD_SAMA5D4_EK=y
+# CONFIG_ARCH_BOARD_CUSTOM is not set
+CONFIG_ARCH_BOARD="sama5d4-ek"
+
+#
+# Common Board Options
+#
+CONFIG_ARCH_HAVE_LEDS=y
+CONFIG_ARCH_LEDS=y
+CONFIG_ARCH_HAVE_BUTTONS=y
+# CONFIG_ARCH_BUTTONS is not set
+CONFIG_ARCH_HAVE_IRQBUTTONS=y
+
+#
+# Board-Specific Options
+#
+# CONFIG_SAMA5D4EK_384MHZ is not set
+# CONFIG_SAMA5D4EK_396MHZ is not set
+CONFIG_SAMA5D4EK_528MHZ=y
+CONFIG_SAMA5D4EK_MT47H128M16RT=y
+# CONFIG_SAMA5D4EK_MT47H64M16HR is not set
+# CONFIG_SAMA5D4EK_DRAM_MAIN is not set
+CONFIG_SAMA5D4EK_AT25_MAIN=y
+CONFIG_SAMA5D4EK_AT25_PROGSIZE=131072
+CONFIG_SAMA5D4EK_AT25_AUTOMOUNT=y
+# CONFIG_SAMA5D4EK_AT25_FTL is not set
+CONFIG_SAMA5D4EK_AT25_CHARDEV=y
+
+#
+# RTOS Features
+#
+CONFIG_DISABLE_OS_API=y
+# CONFIG_DISABLE_CLOCK is not set
+# CONFIG_DISABLE_POSIX_TIMERS is not set
+# CONFIG_DISABLE_PTHREAD is not set
+# CONFIG_DISABLE_SIGNALS is not set
+# CONFIG_DISABLE_MQUEUE is not set
+CONFIG_DISABLE_ENVIRON=y
+
+#
+# Clocks and Timers
+#
+CONFIG_MSEC_PER_TICK=10
+# CONFIG_SYSTEM_TIME64 is not set
+# CONFIG_CLOCK_MONOTONIC is not set
+# CONFIG_JULIAN_TIME is not set
+CONFIG_START_YEAR=2014
+CONFIG_START_MONTH=7
+CONFIG_START_DAY=31
+CONFIG_MAX_WDOGPARMS=2
+CONFIG_PREALLOC_WDOGS=16
+CONFIG_PREALLOC_TIMERS=4
+
+#
+# Tasks and Scheduling
+#
+CONFIG_USER_ENTRYPOINT="at25_main"
+CONFIG_RR_INTERVAL=200
+CONFIG_TASK_NAME_SIZE=32
+CONFIG_MAX_TASK_ARGS=4
+CONFIG_MAX_TASKS=16
+# CONFIG_SCHED_HAVE_PARENT is not set
+CONFIG_SCHED_WAITPID=y
+
+#
+# Pthread Options
+#
+# CONFIG_MUTEX_TYPES is not set
+CONFIG_NPTHREAD_KEYS=4
+
+#
+# Performance Monitoring
+#
+# CONFIG_SCHED_CPULOAD is not set
+# CONFIG_SCHED_INSTRUMENTATION is not set
+
+#
+# Files and I/O
+#
+CONFIG_DEV_CONSOLE=y
+# CONFIG_FDCLONE_DISABLE is not set
+# CONFIG_FDCLONE_STDIO is not set
+CONFIG_SDCLONE_DISABLE=y
+CONFIG_NFILE_DESCRIPTORS=8
+CONFIG_NFILE_STREAMS=8
+CONFIG_NAME_MAX=32
+# CONFIG_PRIORITY_INHERITANCE is not set
+
+#
+# RTOS hooks
+#
+# CONFIG_BOARD_INITIALIZE is not set
+# CONFIG_SCHED_STARTHOOK is not set
+# CONFIG_SCHED_ATEXIT is not set
+# CONFIG_SCHED_ONEXIT is not set
+
+#
+# Signal Numbers
+#
+CONFIG_SIG_SIGUSR1=1
+CONFIG_SIG_SIGUSR2=2
+CONFIG_SIG_SIGALARM=3
+CONFIG_SIG_SIGCONDTIMEDOUT=16
+
+#
+# POSIX Message Queue Options
+#
+CONFIG_PREALLOC_MQ_MSGS=4
+CONFIG_MQ_MAXMSGSIZE=32
+
+#
+# Stack and heap information
+#
+CONFIG_IDLETHREAD_STACKSIZE=1024
+CONFIG_USERMAIN_STACKSIZE=2048
+CONFIG_PTHREAD_STACK_MIN=256
+CONFIG_PTHREAD_STACK_DEFAULT=2048
+
+#
+# Device Drivers
+#
+CONFIG_DISABLE_POLL=y
+CONFIG_DEV_NULL=y
+# CONFIG_DEV_ZERO is not set
+# CONFIG_LOOP is not set
+# CONFIG_RAMDISK is not set
+# CONFIG_CAN is not set
+# CONFIG_ARCH_HAVE_PWM_PULSECOUNT is not set
+# CONFIG_PWM is not set
+# CONFIG_ARCH_HAVE_I2CRESET is not set
+# CONFIG_I2C is not set
+CONFIG_SPI=y
+# CONFIG_SPI_OWNBUS is not set
+CONFIG_SPI_EXCHANGE=y
+# CONFIG_SPI_CMDDATA is not set
+# CONFIG_SPI_BITBANG is not set
+# CONFIG_I2S is not set
+# CONFIG_RTC is not set
+# CONFIG_WATCHDOG is not set
+# CONFIG_TIMER is not set
+# CONFIG_ANALOG is not set
+# CONFIG_AUDIO_DEVICES is not set
+# CONFIG_VIDEO_DEVICES is not set
+# CONFIG_BCH is not set
+# CONFIG_INPUT is not set
+# CONFIG_LCD is not set
+# CONFIG_MMCSD is not set
+CONFIG_MTD=y
+
+#
+# MTD Configuration
+#
+# CONFIG_MTD_PARTITION is not set
+# CONFIG_MTD_SECT512 is not set
+# CONFIG_MTD_BYTE_WRITE is not set
+# CONFIG_MTD_CONFIG is not set
+# CONFIG_MTD_CONFIG_RAM_CONSOLIDATE is not set
+
+#
+# MTD Device Drivers
+#
+# CONFIG_MTD_NAND is not set
+# CONFIG_RAMMTD is not set
+# CONFIG_MTD_AT24XX is not set
+CONFIG_MTD_AT25=y
+CONFIG_AT25_SPIMODE=0
+CONFIG_AT25_SPIFREQUENCY=20000000
+# CONFIG_MTD_AT45DB is not set
+# CONFIG_MTD_M25P is not set
+# CONFIG_MTD_SMART is not set
+# CONFIG_MTD_RAMTRON is not set
+# CONFIG_MTD_SST25 is not set
+# CONFIG_MTD_SST25XX is not set
+# CONFIG_MTD_SST39FV is not set
+# CONFIG_MTD_W25 is not set
+# CONFIG_PIPES is not set
+# CONFIG_PM is not set
+# CONFIG_POWER is not set
+# CONFIG_SENSORS is not set
+# CONFIG_SERCOMM_CONSOLE is not set
+CONFIG_SERIAL=y
+# CONFIG_DEV_LOWCONSOLE is not set
+# CONFIG_16550_UART is not set
+# CONFIG_ARCH_HAVE_UART is not set
+# CONFIG_ARCH_HAVE_UART0 is not set
+# CONFIG_ARCH_HAVE_UART1 is not set
+# CONFIG_ARCH_HAVE_UART2 is not set
+# CONFIG_ARCH_HAVE_UART3 is not set
+# CONFIG_ARCH_HAVE_UART4 is not set
+# CONFIG_ARCH_HAVE_UART5 is not set
+# CONFIG_ARCH_HAVE_UART6 is not set
+# CONFIG_ARCH_HAVE_UART7 is not set
+# CONFIG_ARCH_HAVE_UART8 is not set
+# CONFIG_ARCH_HAVE_SCI0 is not set
+# CONFIG_ARCH_HAVE_SCI1 is not set
+# CONFIG_ARCH_HAVE_USART0 is not set
+# CONFIG_ARCH_HAVE_USART1 is not set
+# CONFIG_ARCH_HAVE_USART2 is not set
+CONFIG_ARCH_HAVE_USART3=y
+# CONFIG_ARCH_HAVE_USART4 is not set
+# CONFIG_ARCH_HAVE_USART5 is not set
+# CONFIG_ARCH_HAVE_USART6 is not set
+# CONFIG_ARCH_HAVE_USART7 is not set
+# CONFIG_ARCH_HAVE_USART8 is not set
+
+#
+# USART Configuration
+#
+CONFIG_USART3_ISUART=y
+CONFIG_MCU_SERIAL=y
+CONFIG_STANDARD_SERIAL=y
+CONFIG_USART3_SERIAL_CONSOLE=y
+# CONFIG_NO_SERIAL_CONSOLE is not set
+
+#
+# USART3 Configuration
+#
+CONFIG_USART3_RXBUFSIZE=256
+CONFIG_USART3_TXBUFSIZE=256
+CONFIG_USART3_BAUD=115200
+CONFIG_USART3_BITS=8
+CONFIG_USART3_PARITY=0
+CONFIG_USART3_2STOP=0
+# CONFIG_USART3_IFLOWCONTROL is not set
+# CONFIG_USART3_OFLOWCONTROL is not set
+# CONFIG_SERIAL_IFLOWCONTROL is not set
+# CONFIG_SERIAL_OFLOWCONTROL is not set
+# CONFIG_USBDEV is not set
+# CONFIG_USBHOST is not set
+# CONFIG_WIRELESS is not set
+
+#
+# System Logging Device Options
+#
+
+#
+# System Logging
+#
+# CONFIG_RAMLOG is not set
+
+#
+# Networking Support
+#
+# CONFIG_ARCH_HAVE_NET is not set
+# CONFIG_ARCH_HAVE_PHY is not set
+# CONFIG_NET is not set
+
+#
+# File Systems
+#
+
+#
+# File system configuration
+#
+# CONFIG_DISABLE_MOUNTPOINT is not set
+# CONFIG_DISABLE_PSEUDOFS_OPERATIONS is not set
+CONFIG_FS_READABLE=y
+CONFIG_FS_WRITABLE=y
+# CONFIG_FS_RAMMAP is not set
+CONFIG_FS_FAT=y
+CONFIG_FAT_LCNAMES=y
+CONFIG_FAT_LFN=y
+CONFIG_FAT_MAXFNAME=32
+# CONFIG_FS_FATTIME is not set
+# CONFIG_FAT_DMAMEMORY is not set
+# CONFIG_FS_NXFFS is not set
+# CONFIG_FS_ROMFS is not set
+# CONFIG_FS_SMARTFS is not set
+# CONFIG_FS_BINFS is not set
+# CONFIG_FS_PROCFS is not set
+
+#
+# System Logging
+#
+# CONFIG_SYSLOG_ENABLE is not set
+# CONFIG_SYSLOG is not set
+
+#
+# Graphics Support
+#
+# CONFIG_NX is not set
+
+#
+# Memory Management
+#
+# CONFIG_MM_MULTIHEAP is not set
+# CONFIG_MM_SMALL is not set
+CONFIG_MM_REGIONS=1
+# CONFIG_ARCH_HAVE_HEAP2 is not set
+# CONFIG_GRAN is not set
+
+#
+# Audio Support
+#
+# CONFIG_AUDIO is not set
+
+#
+# Binary Formats
+#
+# CONFIG_BINFMT_DISABLE is not set
+# CONFIG_NXFLAT is not set
+# CONFIG_ELF is not set
+CONFIG_BUILTIN=y
+# CONFIG_PIC is not set
+CONFIG_SYMTAB_ORDEREDBYNAME=y
+
+#
+# Library Routines
+#
+
+#
+# Standard C Library Options
+#
+CONFIG_STDIO_BUFFER_SIZE=64
+CONFIG_STDIO_LINEBUFFER=y
+CONFIG_NUNGET_CHARS=2
+# CONFIG_LIBM is not set
+# CONFIG_NOPRINTF_FIELDWIDTH is not set
+# CONFIG_LIBC_FLOATINGPOINT is not set
+CONFIG_LIB_RAND_ORDER=1
+# CONFIG_EOL_IS_CR is not set
+# CONFIG_EOL_IS_LF is not set
+# CONFIG_EOL_IS_BOTH_CRLF is not set
+CONFIG_EOL_IS_EITHER_CRLF=y
+# CONFIG_LIBC_EXECFUNCS is not set
+CONFIG_POSIX_SPAWN_PROXY_STACKSIZE=1024
+CONFIG_TASK_SPAWN_DEFAULT_STACKSIZE=2048
+# CONFIG_LIBC_STRERROR is not set
+# CONFIG_LIBC_PERROR_STDOUT is not set
+CONFIG_ARCH_LOWPUTC=y
+CONFIG_LIB_SENDFILE_BUFSIZE=512
+# CONFIG_ARCH_ROMGETC is not set
+# CONFIG_ARCH_OPTIMIZED_FUNCTIONS is not set
+
+#
+# Non-standard Library Support
+#
+# CONFIG_SCHED_WORKQUEUE is not set
+# CONFIG_LIB_KBDCODEC is not set
+# CONFIG_LIB_SLCDCODEC is not set
+
+#
+# Basic CXX Support
+#
+# CONFIG_C99_BOOL8 is not set
+CONFIG_HAVE_CXX=y
+CONFIG_HAVE_CXXINITIALIZE=y
+# CONFIG_CXX_NEWLONG is not set
+
+#
+# uClibc++ Standard C++ Library
+#
+# CONFIG_UCLIBCXX is not set
+
+#
+# Application Configuration
+#
+
+#
+# Built-In Applications
+#
+CONFIG_BUILTIN_PROXY_STACKSIZE=1024
+
+#
+# Examples
+#
+# CONFIG_EXAMPLES_BUTTONS is not set
+# CONFIG_EXAMPLES_CAN is not set
+# CONFIG_EXAMPLES_CONFIGDATA is not set
+# CONFIG_EXAMPLES_CPUHOG is not set
+# CONFIG_EXAMPLES_CXXTEST is not set
+# CONFIG_EXAMPLES_DHCPD is not set
+# CONFIG_EXAMPLES_ELF is not set
+# CONFIG_EXAMPLES_FTPC is not set
+# CONFIG_EXAMPLES_FTPD is not set
+# CONFIG_EXAMPLES_HELLO is not set
+# CONFIG_EXAMPLES_HELLOXX is not set
+# CONFIG_EXAMPLES_JSON is not set
+# CONFIG_EXAMPLES_HIDKBD is not set
+# CONFIG_EXAMPLES_KEYPADTEST is not set
+# CONFIG_EXAMPLES_IGMP is not set
+# CONFIG_EXAMPLES_MM is not set
+# CONFIG_EXAMPLES_MODBUS is not set
+# CONFIG_EXAMPLES_MOUNT is not set
+# CONFIG_EXAMPLES_NRF24L01TERM is not set
+# CONFIG_EXAMPLES_NSH is not set
+# CONFIG_EXAMPLES_NULL is not set
+# CONFIG_EXAMPLES_NX is not set
+# CONFIG_EXAMPLES_NXCONSOLE is not set
+# CONFIG_EXAMPLES_NXFFS is not set
+# CONFIG_EXAMPLES_NXFLAT is not set
+# CONFIG_EXAMPLES_NXHELLO is not set
+# CONFIG_EXAMPLES_NXIMAGE is not set
+# CONFIG_EXAMPLES_NXLINES is not set
+# CONFIG_EXAMPLES_NXTEXT is not set
+# CONFIG_EXAMPLES_OSTEST is not set
+# CONFIG_EXAMPLES_PIPE is not set
+# CONFIG_EXAMPLES_POLL is not set
+# CONFIG_EXAMPLES_POSIXSPAWN is not set
+# CONFIG_EXAMPLES_QENCODER is not set
+# CONFIG_EXAMPLES_RGMP is not set
+# CONFIG_EXAMPLES_ROMFS is not set
+# CONFIG_EXAMPLES_SENDMAIL is not set
+# CONFIG_EXAMPLES_SERIALBLASTER is not set
+# CONFIG_EXAMPLES_SERIALRX is not set
+# CONFIG_EXAMPLES_SERLOOP is not set
+# CONFIG_EXAMPLES_SLCD is not set
+# CONFIG_EXAMPLES_SMART is not set
+# CONFIG_EXAMPLES_TCPECHO is not set
+# CONFIG_EXAMPLES_TELNETD is not set
+# CONFIG_EXAMPLES_THTTPD is not set
+# CONFIG_EXAMPLES_TIFF is not set
+# CONFIG_EXAMPLES_TOUCHSCREEN is not set
+# CONFIG_EXAMPLES_UDP is not set
+# CONFIG_EXAMPLES_UIP is not set
+# CONFIG_EXAMPLES_USBSERIAL is not set
+# CONFIG_EXAMPLES_USBTERM is not set
+# CONFIG_EXAMPLES_WATCHDOG is not set
+
+#
+# Graphics Support
+#
+# CONFIG_TIFF is not set
+
+#
+# Interpreters
+#
+# CONFIG_INTERPRETERS_FICL is not set
+# CONFIG_INTERPRETERS_PCODE is not set
+
+#
+# Network Utilities
+#
+
+#
+# Networking Utilities
+#
+# CONFIG_NETUTILS_CODECS is not set
+# CONFIG_NETUTILS_DHCPD is not set
+# CONFIG_NETUTILS_FTPC is not set
+# CONFIG_NETUTILS_FTPD is not set
+# CONFIG_NETUTILS_JSON is not set
+# CONFIG_NETUTILS_SMTP is not set
+# CONFIG_NETUTILS_TFTPC is not set
+# CONFIG_NETUTILS_THTTPD is not set
+# CONFIG_NETUTILS_UIPLIB is not set
+# CONFIG_NETUTILS_WEBCLIENT is not set
+
+#
+# FreeModBus
+#
+# CONFIG_MODBUS is not set
+
+#
+# NSH Library
+#
+# CONFIG_NSH_LIBRARY is not set
+
+#
+# NxWidgets/NxWM
+#
+
+#
+# Platform-specific Support
+#
+# CONFIG_PLATFORM_CONFIGDATA is not set
+
+#
+# System Libraries and NSH Add-Ons
+#
+
+#
+# Custom Free Memory Command
+#
+# CONFIG_SYSTEM_FREE is not set
+
+#
+# EMACS-like Command Line Editor
+#
+# CONFIG_SYSTEM_CLE is not set
+
+#
+# FLASH Program Installation
+#
+# CONFIG_SYSTEM_INSTALL is not set
+
+#
+# FLASH Erase-all Command
+#
+
+#
+# Intel HEX to binary conversion
+#
+CONFIG_SYSTEM_HEX2BIN=y
+# CONFIG_SYSTEM_HEX2BIN_DEBUG is not set
+
+#
+# I2C tool
+#
+
+#
+# INI File Parser
+#
+# CONFIG_SYSTEM_INIFILE is not set
+
+#
+# NxPlayer media player library / command Line
+#
+# CONFIG_SYSTEM_NXPLAYER is not set
+
+#
+# RAM test
+#
+# CONFIG_SYSTEM_RAMTEST is not set
+
+#
+# readline()
+#
+CONFIG_SYSTEM_READLINE=y
+CONFIG_READLINE_ECHO=y
+
+#
+# P-Code Support
+#
+
+#
+# PHY Tool
+#
+
+#
+# Power Off
+#
+# CONFIG_SYSTEM_POWEROFF is not set
+
+#
+# RAMTRON
+#
+# CONFIG_SYSTEM_RAMTRON is not set
+
+#
+# SD Card
+#
+# CONFIG_SYSTEM_SDCARD is not set
+
+#
+# Sysinfo
+#
+# CONFIG_SYSTEM_SYSINFO is not set
+
+#
+# VI Work-Alike Editor
+#
+# CONFIG_SYSTEM_VI is not set
+
+#
+# Stack Monitor
+#
+
+#
+# USB CDC/ACM Device Commands
+#
+
+#
+# USB Composite Device Commands
+#
+
+#
+# USB Mass Storage Device Commands
+#
+
+#
+# USB Monitor
+#
+
+#
+# Zmodem Commands
+#
+# CONFIG_SYSTEM_ZMODEM is not set
diff --git a/nuttx/configs/sama5d4-ek/at25boot/setenv.sh b/nuttx/configs/sama5d4-ek/at25boot/setenv.sh
new file mode 100755
index 000000000..145024ad3
--- /dev/null
+++ b/nuttx/configs/sama5d4-ek/at25boot/setenv.sh
@@ -0,0 +1,76 @@
+#!/bin/bash
+# configs/sama5d4-ek/at25boot/setenv.sh
+#
+#   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.
+#
+
+if [ "$_" = "$0" ] ; then
+  echo "You must source this script, not run it!" 1>&2
+  exit 1
+fi
+
+WD=`pwd`
+if [ ! -x "setenv.sh" ]; then
+  echo "This script must be executed from the top-level NuttX build directory"
+  exit 1
+fi
+
+if [ -z "${PATH_ORIG}" ]; then
+  export PATH_ORIG="${PATH}"
+fi
+
+# This is the Cygwin path to the location where I installed the Atmel GCC
+# toolchain under Windows.  You will also have to edit this if you install
+# this toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/Atmel/Atmel Toolchain/ARM GCC/Native/4.7.3.99/arm-gnu-toolchain/bin"
+
+# This is the Cygwin path to the location where I installed the CodeSourcery
+# toolchain under windows.  You will also have to edit this if you install
+# the CodeSourcery toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery G++ Lite/bin"
+export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+
+# These are the Cygwin paths to the locations where I installed the Atollic
+# toolchain under windows.  You will also have to edit this if you install
+# the Atollic toolchain in any other location.  /usr/bin is added before
+# the Atollic bin path because there is are binaries named gcc.exe and g++.exe
+# at those locations as well.
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for ARM Pro 2.3.0/ARMTools/bin"
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for STMicroelectronics STM32 Lite 2.3.0/ARMTools/bin"
+
+# This is the Cygwin path to the location where I build the buildroot
+# toolchain.
+#export TOOLCHAIN_BIN="${WD}/../misc/buildroot/build_arm/staging_dir/bin"
+
+# Add the path to the toolchain to the PATH varialble
+export PATH="${TOOLCHAIN_BIN}:/sbin:/usr/sbin:${PATH_ORIG}"
+
+echo "PATH : ${PATH}"
diff --git a/nuttx/configs/sama5d4-ek/src/at25_main.c b/nuttx/configs/sama5d4-ek/src/at25_main.c
new file mode 100644
index 000000000..30e4eb522
--- /dev/null
+++ b/nuttx/configs/sama5d4-ek/src/at25_main.c
@@ -0,0 +1,274 @@
+/*****************************************************************************
+ * configs/sama5d4-ek/src/at25_main.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 <stdint.h>
+#include <stdio.h>
+#include <debug.h>
+
+#include <arch/irq.h>
+#include <apps/hex2bin.h>
+
+#include "sama5d4-ek.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+/* Configuration ************************************************************/
+
+#ifndef HAVE_AT25
+#  error The AT25 Serial FLASH is not available
+#endif
+
+#ifndef CONFIG_SAMA5D4EK_NAND_AUTOMOUNT
+#  error CONFIG_SAMA5D4EK_NAND_AUTOMOUNT must be selected
+#endif
+
+#ifndef CONFIG_SAMA5D4EK_AT25_CHARDEV
+#  error CONFIG_SAMA5D4EK_AT25_CHARDEV must be selected
+#endif
+
+#ifndef CONFIG_BOOT_SDRAM_DATA
+#  error CONFIG_BOOT_SDRAM_DATA must be selected
+#endif
+
+#if defined(CONFIG_SAMA5D4EK_AT25_PROGSIZE) || CONFIG_SAMA5D4EK_AT25_PROGSIZE < 128
+#  error Large CONFIG_SAMA5D4EK_AT25_PROGSIZE must be selected
+#endif
+
+#define DEVNAME_MAXSIZE 12
+#define IOBUFFER_SIZE   512
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static uint8_t g_heximage[CONFIG_SAMA5D4EK_AT25_PROGSIZE];
+static uint8_t g_iobuffer[IOBUFFER_SIZE];
+statid uint8_t g_at25dev[DEVNAME_MAXSIZE];
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: at25_main
+ *
+ * Description:
+ *   at25_main is a tiny program that runs in ISRAM.  at25_main will
+ *   configure DRAM and the AT25 serial FLASH, present a prompt, and load
+ *   an Intel HEX file into the AT25 serial FLASH (after first buffering
+ *   the binary data into memory).  On re-boot, the program loaded into
+ *   the AT25 FLASH should then execute.
+ *
+ *   On entry:
+ *   - SDRAM has already been initialized (we are using it for .bss!)
+ *   - SPI0 chip select has already been configured.
+ *
+ ****************************************************************************/
+
+int at25_main(int argc, char *argv)
+{
+  struct lib_rawinstream_s rawinstream;
+  struct lib_memsostream_s memoutstream;
+  const uint8_t *src;
+  uint8_t *dest;
+  ssize_t nwritten;
+  ssize_t nread;
+  ssize_t remaining;
+  size_t rdsize;
+  int fd;
+  int ret;
+
+  /* Configure the AT25 as the a character device.  */
+
+  ret = sam_at25_automount(AT25_MINOR);
+  if (ret < 0)
+    {
+      fprintf(stderr, "ERROR: Failed to mount AT25 FLASH: %d\n", ret);
+      return EXIT_FAILURE;
+    }
+
+  /* Open the AT25 device for writing */
+
+  snprintf(g_at25dev, DEVNAME_MAXSIZE, "/dev/mtd%d", AT25_MINOR);
+  fd = open(g_at25dev, O_WRONLY);
+  if (fd < 0)
+    {
+      int errcode = errno;
+      fprintf(stderr, "ERROR: Failed to open %s: %d\n", g_at25dev, errcode);
+      return EXIT_FAILURE;
+    }
+
+  /* Wrap stdin as an IN stream that can the HEX data over the serial port */
+
+  lib_rawinstream(&rawinstream, 0);
+
+  /* Wrap the memory buffer as a seek-able OUT stream in which we can buffer
+   * the binary data.
+   */
+
+  lib_memsostream(&memoutstream, (FAR char *)g_heximage,
+                  CONFIG_SAMA5D4EK_AT25_PROGSIZE);
+
+  /* We are ready to load the Intel HEX stream into DRAM.
+   *
+   * Hmm.. With no hardware handshake, there is a possibility of data loss
+   * to overrunning incoming data buffer.  So far I have not seen this at
+   * 115200 8N1, but still it is a possibility.
+   */
+
+  printf("Send Intel HEX file now\n");
+  fflush(stdout);
+
+  return hex2bin(&rawinstream.public, &memoutstream.public,
+                 (uint32_t)SAM_ISRAM_VSECTION,
+                 (uint32_t)(SAM_ISRAM_VSECTION + CONFIG_SAMA5D4EK_AT25_PROGSIZE),
+                0);
+  if (ret < 0)
+    {
+      /* We failed the load */
+
+      fprintf(stderr, "ERROR: Intel HEX file load failed: %d\n", ret);
+      close(fd);
+      return EXIT_FAILURE;
+    }
+
+  /* The HEX file load was successful, write the data to FLASH */
+
+  printf("Successfully loaded the Intel HEX file into memory...\n");
+  printf("  Writing %d bytes to the AT25 Serial FLASH\n",
+         memoutstream.public.nput);
+
+  remaining = memoutstream.public.nput;
+  dest      = g_heximage;
+
+  do
+    {
+      nwritten = write(fd, dest, memoutstream.public.nput);
+      if (nwritten <= 0)
+        {
+          int errcode = errno;
+          if (errno != EINTR)
+            {
+              fprintf(stderr, "ERROR: Write failed: %d\n", errcode);
+              close(fd);
+              return EXIT_FAILURE;
+            }
+        }
+      else
+        {
+          remaining -= nwritten;
+          dest += nwritten;
+        }
+    }
+  while (remaining > 0);
+
+  close(fd);
+
+  /* Now verify that the image in memory and the image in FLASH are truly
+   * the same.
+   */
+
+  printf("  Verifying %d bytes in the AT25 Serial FLASH\n",
+         memoutstream.public.nput);
+
+  /* Open the AT25 device for writing */
+
+  fd = open(g_at25dev, O_RDONLY);
+  if (fd < 0)
+    {
+      int errcode = errno;
+      fprintf(stderr, "ERROR: Failed to open %s: %d\n", g_at25dev, errcode);
+      return EXIT_FAILURE;
+    }
+
+  remaining = memoutstream.public.nput;
+  src = g_heximage;
+
+  do
+    {
+      rdsize = remaining;
+      if (rdsize > IOBUFFER_SIZE)
+        {
+          rdsize = IOBUFFER_SIZE;
+        }
+
+      nread = read(fd, g_iobuffer, rdsize);
+      if (nread <= 0)
+        {
+          int errcode = errno;
+          if (errno != EINTR)
+            {
+              fprintf(stderr, "ERROR: Read failed: %d\n", errcode);
+              close(fd);
+              return EXIT_FAILURE;
+            }
+        }
+      else
+        {
+          if (memcmp(g_iobuffer, src, nread) != 0)
+            {
+              fprintf(stderr, "ERROR: Verify failed at offset %d\n",
+                      memoutstream.public.nput - remaining);
+              close(fd);
+              return EXIT_FAILURE;
+            }
+
+          remaining -= nwritten;
+          dest += nwritten;
+        }
+    }
+  while (remaining > 0);
+
+  printf("  Successfully verified %d bytes in the AT25 Serial FLASH\n",
+         memoutstream.public.nput);
+
+  close(fd);
+  return EXIT_SUCCESS;
+}
diff --git a/nuttx/configs/sama5d4-ek/src/dram_main.c b/nuttx/configs/sama5d4-ek/src/dram_main.c
index 8f38a3ad3..1fa34d920 100644
--- a/nuttx/configs/sama5d4-ek/src/dram_main.c
+++ b/nuttx/configs/sama5d4-ek/src/dram_main.c
@@ -85,7 +85,7 @@ typedef void (*dram_entry_t)(void);
  *
  * Description:
  *   dram_main is a tiny program that runs in ISRAM.  dram_main will
- *   configure DRAM, present a prompt, load and Intel HEX file into DRAM,
+ *   configure DRAM, present a prompt, load an Intel HEX file into DRAM,
  *   and either start that program or wait for you to break in with the
  *   debugger.
  *
@@ -105,7 +105,7 @@ int dram_main(int argc, char *argv)
    * Intel HEX stream into DRAM.
    *
    * Hmm.. With no hardware handshake, there is a possibility of data loss
-   * to overruning incoming data buffer.  So far I have not seen this at
+   * to overrunning incoming data buffer.  So far I have not seen this at
    * 115200 8N1, but still it is a possibility.
    */
 
diff --git a/nuttx/configs/sama5d4-ek/src/sam_at25.c b/nuttx/configs/sama5d4-ek/src/sam_at25.c
index 5e7d12648..950b64d8e 100644
--- a/nuttx/configs/sama5d4-ek/src/sam_at25.c
+++ b/nuttx/configs/sama5d4-ek/src/sam_at25.c
@@ -46,6 +46,7 @@
 #include <errno.h>
 #include <debug.h>
 
+#include <nuttx/fs/fs.h>
 #include <nuttx/spi/spi.h>
 #include <nuttx/mtd/mtd.h>
 #include <nuttx/fs/nxffs.h>
@@ -75,6 +76,10 @@ int sam_at25_automount(int minor)
 {
   FAR struct spi_dev_s *spi;
   FAR struct mtd_dev_s *mtd;
+#ifdef CONFIG_SAMA5D4EK_AT25_CHARDEV
+  uint8_t blockdev[18];
+  uint8_t chardev[12];
+#endif
   static bool initialized = false;
   int ret;
 
@@ -101,15 +106,41 @@ int sam_at25_automount(int minor)
         }
 
 #if defined(CONFIG_SAMA5D4EK_AT25_FTL)
-      /* And finally, use the FTL layer to wrap the MTD driver as a block driver */
+      /* And finally, use the FTL layer to wrap the MTD driver as a block
+       * driver.
+       */
 
-      ret = ftl_initialize(AT25_MINOR, mtd);
+      ret = ftl_initialize(minor, mtd);
       if (ret < 0)
         {
           fdbg("ERROR: Failed to initialize the FTL layer: %d\n", ret);
           return ret;
         }
 
+#elif defined(CONFIG_SAMA5D4EK_AT25_CHARDEV)
+      /* Use the FTL layer to wrap the MTD driver as a block driver */
+
+      ret = ftl_initialize(minor, mtd);
+      if (ret < 0)
+        {
+          fdbg("ERROR: Failed to initialize the FTL layer: %d\n", ret);
+          return ret;
+        }
+
+      /* Use the minor number to create device paths */
+
+      snprintf(blockdev, 18, "/dev/mtdblock%d", minor);
+      snprintf(chardev, 12, "/dev/mtd%d", minor);
+
+      /* Now create a character device on the block device */
+
+      ret = bchdev_register(blockdev, chardev, false);
+      if (ret < 0)
+        {
+          fdbg("ERROR: bchdev_register %s failed: %d\n", chardev, ret);
+          return ret;
+        }
+
 #elif defined(CONFIG_SAMA5D4EK_AT25_NXFFS)
       /* Initialize to provide NXFFS on the MTD interface */
 
@@ -128,8 +159,10 @@ int sam_at25_automount(int minor)
           fdbg("ERROR: Failed to mount the NXFFS volume: %d\n", errno);
           return ret;
         }
+
 #endif
-      /* Now we are initializeed */
+
+      /* Now we are initialized */
 
       initialized = true;
     }
diff --git a/nuttx/configs/sama5d4-ek/src/sam_boot.c b/nuttx/configs/sama5d4-ek/src/sam_boot.c
index 5814d032e..d1ea4a500 100644
--- a/nuttx/configs/sama5d4-ek/src/sam_boot.c
+++ b/nuttx/configs/sama5d4-ek/src/sam_boot.c
@@ -71,7 +71,8 @@ void sam_boardinitialize(void)
    * sam_spiinitialize() has been brought into the link.
    */
 
-#if defined(CONFIG_SAMA5_SPI0) || defined(CONFIG_SAMA5_SPI1)
+#if defined(CONFIG_SAMA5_SPI0) || defined(CONFIG_SAMA5_SPI1) || \
+    defined(CONFIG_SAMA5_SPI2)
   if (sam_spiinitialize)
     {
       sam_spiinitialize();
diff --git a/nuttx/configs/sama5d4-ek/src/sama5d4-ek.h b/nuttx/configs/sama5d4-ek/src/sama5d4-ek.h
index 4e1fd20db..fd1f96ff3 100644
--- a/nuttx/configs/sama5d4-ek/src/sama5d4-ek.h
+++ b/nuttx/configs/sama5d4-ek/src/sama5d4-ek.h
@@ -152,16 +152,29 @@
 #  undef CONFIG_SAMA5D4EK_AT25_NXFFS
 #endif
 
-#if !defined(CONFIG_SAMA5D4EK_AT25_FTL) && !defined(CONFIG_SAMA5D4EK_AT25_NXFFS)
+#if !defined(CONFIG_SAMA5D4EK_AT25_FTL) && !defined(CONFIG_SAMA5D4EK_AT25_CHARDEV) && \
+    !defined(CONFIG_SAMA5D4EK_AT25_NXFFS)
 #  undef HAVE_AT25
 #endif
 
+#if defined(CONFIG_SAMA5D4EK_AT25_FTL) && defined(CONFIG_SAMA5D4EK_AT25_CHARDEV)
+#  warning Both CONFIG_SAMA5D4EK_AT25_CHARDEV and CONFIG_SAMA5D4EK_AT25_FTL are set
+#  warning Ignoring CONFIG_SAMA5D4EK_AT25_FTL
+#  undef CONFIG_SAMA5D4EK_AT25_FTL
+#endif
+
 #if defined(CONFIG_SAMA5D4EK_AT25_FTL) && defined(CONFIG_SAMA5D4EK_AT25_NXFFS)
 #  warning Both CONFIG_SAMA5D4EK_AT25_FTL and CONFIG_SAMA5D4EK_AT25_NXFFS are set
 #  warning Ignoring CONFIG_SAMA5D4EK_AT25_NXFFS
 #  undef CONFIG_SAMA5D4EK_AT25_NXFFS
 #endif
 
+#if defined(CONFIG_SAMA5D4EK_AT25_CHARDEV) && defined(CONFIG_SAMA5D4EK_AT25_NXFFS)
+#  warning Both CONFIG_SAMA5D4EK_AT25_CHARDEV and CONFIG_SAMA5D4EK_AT25_NXFFS are set
+#  warning Ignoring CONFIG_SAMA5D4EK_AT25_NXFFS
+#  undef CONFIG_SAMA5D4EK_AT25_NXFFS
+#endif
+
 /* Assign minor device numbers.  For example, if we also use MINOR number 0
  * for the AT25, it should appear as /dev/mtdblock0
  */
@@ -509,25 +522,21 @@
 #endif
 
 /* SPI Chip Selects *****************************************************************/
-/* Both the Ronetix and Embest versions of the SAMAD3x CPU modules include an
- * Atmel AT25DF321A, 32-megabit, 2.7-volt SPI serial flash.  The SPI
- * connection is as follows:
- *
- *   AT25DF321A      SAMA5
- *   --------------- -----------------------------------------------
- *   SI              PD11 SPI0_MOSI
- *   SO              PD10 SPI0_MIS0
- *   SCK             PD12 SPI0_SPCK
- *   /CS             PD13 via NL17SZ126 if JP1 is closed (See below)
- *
- * JP1 and JP2 seem to related to /CS on the Ronetix board, but the usage is
- * less clear.  For the Embest module, JP1 must be closed to connect /CS to
- * PD13; on the Ronetix schematic, JP11 seems only to bypass a resistor (may
- * not be populated?).  I think closing JP1 is correct in either case.
+/* The SAMA5D4-EK includes an Atmel AT25DF321A, 32-megabit, 2.7-volt SPI serial
+ * FLASH on board.  The connection is as follows:
+ *
+ *   AT25DF321A SAMA5D4-EK      SAMA5
+ *   ---------- --------------- --------------------------------
+ *   SI         AT25_SPI0_SI    PC1 PC1/SPI0_MOSI/PWML2/ISI_D9
+ *   SO         AT25_SPI0_SO    PC0 PC0/SPI0_MISO/PWMH2/ISI_D8
+ *   SCK        AT25_SPI0_SPCK  PC2 PC2/SPI0_SPCK/PWMH3/ISI_D10
+ *   /CS        AT25_SPI0_NCPS0 PC3 PC3/SPI0_NPCS0/PWML3/ISI_D11
+ *
+ * AT25_SPI0_NCPS0 goes to the AT25DF321A as via a NL17SZ126 if JP6 is closed
  */
 
 #define PIO_AT25_NPCS0 (PIO_OUTPUT | PIO_CFG_PULLUP | PIO_OUTPUT_SET | \
-                        PIO_PORT_PIOD | PIO_PIN13)
+                        PIO_PORT_PIOC | PIO_PIN3)
 #define AT25_PORT      SPI0_CS0
 
 /************************************************************************************