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author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2014-06-15 15:33:49 +0200 |
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committer | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2014-06-29 10:54:29 +0200 |
commit | 54a653f649d131f8a038fc1314383b60294ad351 (patch) | |
tree | 4029ce9893c89b6b012535998573ff733d2bd4e2 /board/atmel | |
parent | 23a94e9d67bc9e347378548076fa7f9a6dcc0b52 (diff) |
configs: add defconfig for the Atmel SAMA5D3 Xplained board
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'board/atmel')
-rw-r--r-- | board/atmel/xplained/readme.txt | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/board/atmel/xplained/readme.txt b/board/atmel/xplained/readme.txt new file mode 100644 index 000000000..e29a11688 --- /dev/null +++ b/board/atmel/xplained/readme.txt @@ -0,0 +1,73 @@ +Atmel SAMA5D3 Xplained board +============================ + +This document explains how to set up a basic Buildroot system on the +Atmel SAMA5D3 Xplained board, whose main site is +http://www.atmel.com/tools/ATSAMA5D3-XPLD.aspx. Additional details can +also be found on the http://www.at91.com/linux4sam/bin/view/Linux4SAM/ +web site. + +Note that the default Buildroot configuration is prepared to boot from +an SD card: the first stage bootloader, second stage bootloader, +kernel image and root filesystem are all located on the SD card. Some +adjustements in the bootloader configuration will be needed to boot +from NAND flash. + +Configuring and building Buildroot +---------------------------------- + + make atmel_xplained_defconfig + make + +Preparing the SD card +--------------------- + +The SD card must be partitionned with at least two partitions: one +FAT16 partition for the bootloaders, kernel image and Device Tree +blob, and one ext4 partition for the root filesystem. To partition the +SD card: + +sudo sfdisk -uM /dev/mmcblk0 <<EOF +,64,6 +; +EOF + +This creates a 64 MB partition for the FAT16 filesystem (type 6) and +uses the rest for the ext4 filesystem used for the root filesystem. + +Then, format both partitions: + +sudo mkfs.msdos -n boot /dev/mmcblk0p1 +sudo mkfs.ext4 -L rootfs -O ^huge_file /dev/mmcblk0p2 + + Note: the -O ^huge_file option is needed to avoid enabling the huge + files features of ext4 (to support files larges than 2 TB), which + needs the kernel option CONFIG_LBDAF to be enabled. + +Mount both partitions (if not done automatically by your system): + +sudo mount /dev/mmcblk0p1 /media/boot +sudo mount /dev/mmcblk0p2 /media/rootfs + +Copy the bootloaders, kernel image and Device Tree blob to the first +partition: + +cp output/images/sama5d3_xplained-sdcardboot-uboot-3.6.2.bin /media/boot/boot.bin +cp output/images/u-boot.bin /media/boot/u-boot.bin +cp output/images/zImage /media/boot/zImage +cp output/images/at91-sama5d3_xplained.dtb /media/boot/at91-sama5d3_xplained.dtb + +Extract the root filesystem to the second partition: + +sudo tar -C /media/rootfs -xf output/images/rootfs.tar + +Unmount both partitions: + +sudo umount /media/boot +sudo umount /media/rootfs + +Insert your SD card in your Xplained board, and enjoy. The default +U-Boot environment will properly load the kernel and Device Tree blob +from the first partition of the SD card, so everything works +automatically. + |