kumquat-buildroot/board/freescale/imx6sabresd
Vincent Stehlé 8bc74c5258 imx6sabresd: boot to /init in mfgtools mode
Buildroot supplies a nice /init wrapper script to use when booting from a
ramdisk.

We add a patch to u-boot to tell the kernel to boot into /init (instead of
/linuxrc) on i.MX6, when booting in mfgtools mode. This way we can boot a
buildroot system entirely through USB.

Signed-off-by: Vincent Stehlé <vincent.stehle@freescale.com
[Luca: rebase on top of iMX6DL patches and patch iMX6DL defconfig as well]
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
[Luca: build- and run-tested on i.MX6DL SABRESD]
Tested-by: Luca Ceresoli <luca@lucaceresoli.net>
Cc: Gary Bisson <bisson.gary@gmail.com>
Cc: Thomas De Schampheleire <patrickdepinguin+buildroot@gmail.com>
Cc: Gilles Talis <gilles.talis@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2014-09-21 21:23:18 +02:00
..
create-boot-sd.sh
readme.txt
uboot-0001-mx6qsabre_common-boot-Linux-to-init-in-mfgtools-mode.patch

*******************************************************
Freescale i.MX6Q and i.MX6DL SABRESD development boards
*******************************************************

This file documents the Buildroot support for the Freescale SABRE Board for
Smart Devices Based on the i.MX 6 Series (SABRESD).

Read the SABRESD Quick Start Guide for an introduction to the board:
http://cache.freescale.com/files/32bit/doc/quick_start_guide/SABRESDB_IMX6_QSG.pdf

Build
=====

First, configure Buildroot for your SABRESD board.
For i.MX6Q:

  make freescale_imx6qsabresd_defconfig

For i.MX6DL:

  make freescale_imx6dlsabresd_defconfig

Build all components:

  make

You will find in ./output/images/ the following files:
  - imx6dl-sabresd.dtb or imx6q-sabresd.dtb
  - rootfs.ext2
  - rootfs.tar
  - u-boot.imx
  - uImage

Create a bootable SD card
=========================

To determine the device associated to the SD card have a look in the
/proc/partitions file:

  cat /proc/partitions

Run the following script as root on your SD card. This will partition the card
and copy the bootloader, kernel, DTBs and root filesystem as needed.

*** WARNING! The script will destroy all the card content. Use with care! ***

  ./board/freescale/imx6sabresd/create-boot-sd.sh <your-sd-device>

Boot the SABRESD board
======================

To boot your newly created system (refer to the SABRESD Quick Start Guide for
guidance):
- insert the SD card in the SD3 slot of the board;
- locate the BOOT dip switches (SW6), set dips 2 and 7 to ON, all others to OFF;
- connect a Micro USB cable to Debug Port and connect using a terminal emulator
  at 115200 bps, 8n1;
- power on the board.

Enjoy!

References
==========

https://community.freescale.com/docs/DOC-95015
https://community.freescale.com/docs/DOC-95017
https://community.freescale.com/docs/DOC-99218