config: Add defconfig for Freescale i.MX28 EVK
The i.MX28 Evaluation Kit (or EVK) is Freescale's evaluation board based on the i.MX287 Applications Processor. This defconfig is based on mainline u-boot and Linux kernel. Also, we add an SD card creation script and documentation, shamelessly based on the ones for i.MX5/6 by Luca Ceresoli. [Arnout: fixate U-Boot and kernel (headers) versions] Signed-off-by: Vincent Stehlé <vincent.stehle@freescale.com> Cc: Luca Ceresoli <luca@lucaceresoli.net> Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Vincent Stehlé
Thomas Petazzoni
parent
1536362eff
commit
0eb659d04e
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#!/bin/sh
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set -u
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set -e
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PROGNAME=$(basename $0)
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usage()
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{
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echo "Create an SD card that boots on an i.MX28 EVK board."
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echo
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echo "Note: all data on the the card will be completely deleted!"
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echo "Use with care!"
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echo "Superuser permissions may be required to write to the device."
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echo
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echo "Usage: ${PROGNAME} <sd_block_device>"
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echo "Arguments:"
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echo " <sd_block_device> The device to be written to"
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echo
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echo "Example: ${PROGNAME} /dev/mmcblk0"
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echo
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}
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if [ $# -ne 1 ]; then
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usage
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exit 1
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fi
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if [ $(id -u) -ne 0 ]; then
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echo "${PROGNAME} must be run as root"
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exit 1
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fi
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DEV=${1}
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# The partition name prefix depends on the device name:
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# - /dev/sde -> /dev/sde1
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# - /dev/mmcblk0 -> /dev/mmcblk0p1
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if echo ${DEV}|grep -q mmcblk ; then
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PART="p"
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else
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PART=""
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fi
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PART1=${DEV}${PART}1
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PART2=${DEV}${PART}2
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PART3=${DEV}${PART}3
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# Unmount the partitions if mounted
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umount ${PART1} || true
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umount ${PART2} || true
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umount ${PART3} || true
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# First, clear the card
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dd if=/dev/zero of=${DEV} bs=1M count=20
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sync
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# Partition the card.
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# SD layout for i.MX28 boot:
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# - Special partition type 53 at sector 2048, containing an SD-SB-encapsulated u-boot
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# - FAT partition containing zImage
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# - ext2/3 partition formatted as ext2 or ext3, containing the root filesystem.
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sfdisk --force -u S ${DEV} <<EOF
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2048,2000,53
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4048,16000,b
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20048,,L
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EOF
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sync
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# Copy the bootloader at offset 2048
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# (We need to skip the partition table in the .sd, too.)
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dd if=output/images/u-boot.sd of=${DEV}1 bs=1M
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# Prepare a temp dir for mounting partitions
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TMPDIR=$(mktemp -d)
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# FAT partition: kernel
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mkfs.vfat ${PART2}
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mount ${PART2} ${TMPDIR}
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cp output/images/*Image ${TMPDIR}/
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cp output/images/*.dtb ${TMPDIR}/ || true
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sync
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umount ${TMPDIR}
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# ext2 partition: root filesystem
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mkfs.ext2 ${PART3}
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mount ${PART3} ${TMPDIR}
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tar -C ${TMPDIR}/ -xf output/images/rootfs.tar
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sync
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umount ${TMPDIR}
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# Cleanup
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rmdir ${TMPDIR}
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sync
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echo Done
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**************************
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Freescale i.MX28 EVK board
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**************************
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This file documents the Buildroot support for the Freescale i.MX28 EVK board.
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Read the i.MX28 Evaluation Kit Quick Start Guide [1] for an introduction to the
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board.
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Build
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=====
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First, configure Buildroot for your i.MX28 EVK board:
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make freescale_imx28evk_defconfig
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Build all components:
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make
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You will find in ./output/images/ the following files:
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- imx28-evk.dtb
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- rootfs.tar
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- u-boot.sd
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- zImage
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Create a bootable SD card
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=========================
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To determine the device associated to the SD card have a look in the
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/proc/partitions file:
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cat /proc/partitions
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Run the following script as root on your SD card. This will partition the card
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and copy the bootloader, kernel and root filesystem as needed.
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*** WARNING! The script will destroy all the card content. Use with care! ***
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./board/freescale/imx28evk/create-boot-sd.sh <your-sd-device>
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Boot the i.MX28 EVK board
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=========================
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To boot your newly created system (refer to the i.MX28 EVK Quick Start Guide
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[1] for guidance):
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- insert the SD card in the SD Card Socket 0 of the board;
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- verify that your i.MX28 EVK board jumpers and switches are set as mentioned
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in the i.MX28 EVK Quick Start Guide [1];
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- connect an RS232 UART cable to the Debug UART Port and connect using a
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terminal emulator at 115200 bps, 8n1;
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- power on the board.
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Enjoy!
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References
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==========
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[1] http://cache.freescale.com/files/32bit/doc/user_guide/EVK_imx28_QuickStart.pdf
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@ -0,0 +1,25 @@
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# architecture
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BR2_arm=y
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BR2_arm926t=y
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# toolchain
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BR2_KERNEL_HEADERS_VERSION=y
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BR2_DEFAULT_KERNEL_VERSION="3.19.2"
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# system
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BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
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# kernel
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BR2_LINUX_KERNEL=y
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BR2_LINUX_KERNEL_SAME_AS_HEADERS=y
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BR2_LINUX_KERNEL_DEFCONFIG="mxs"
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BR2_LINUX_KERNEL_ZIMAGE=y
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BR2_LINUX_KERNEL_DTS_SUPPORT=y
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BR2_LINUX_KERNEL_INTREE_DTS_NAME="imx28-evk"
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# bootloader
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BR2_TARGET_UBOOT=y
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BR2_TARGET_UBOOT_BOARDNAME="mx28evk"
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BR2_TARGET_UBOOT_CUSTOM_VERSION=y
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BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2015.01"
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BR2_TARGET_UBOOT_FORMAT_SD=y
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