Boot mainline kernel on veyron-jaq

Note: work in progress.

ChromiumOS

Setup

Follow the instructions in the Developer Guide.

Firmware

Build netboot firmware for veyron to pull kernel image and command line from a tftp share on the network. Do the following inside the chroot:

Note: The following uses a servo to update firmware. I think you can do the flashrom command on the device itself, but that introduces a brick risk.

cros_sdk # to enter chroot

BOARD=veyron_jaq

TFTP=<tftpserver>

FTP_FOLDER=${BOARD}

BOOTFILE=${FTP_FOLDER}/vmlinuz

ARGSFILE=${FTP_FOLDER}/cmdline

BIOS=/build/${BOARD}/firmware/image.net.bin

emerge-${BOARD} chromeos-ec libpayload depthcharge coreboot chromeos-bootimage

sudo gbb_utility -s --flags=0x239 ${BIOS}

sudo ~/trunk/src/platform/factory/setup/update_firmware_settings.py \
  -i ${BIOS} \
  --tftpserverip=${TFTP} \
  --bootfile=${BOOTFILE} \
  --argsfile=${ARGSFILE}
dut-control warm_reset:on spi2_buf_en:on spi2_buf_on_flex_en:on spi2_vref:pp1800
sudo flashrom -p ft2232_spi:type=servo-v2${SERIAL_SERVO} --verbose -w ${BIOS}
dut-control spi2_buf_en:off spi2_buf_on_flex_en:off spi2_vref:off warm_reset:off

Kernel

Setup

Pull down a copy of mainline and use multiv7 defconfig (a .config is also attached to this page, but will likely be stale by the time of reading)

mkdir ~/s/kernel

cd ~/s/kernel

git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git .

ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- make O=.build_multiv7 multiv7_defconfig

Download the its file attachment to this page and store it in ~/s/kernel/.build_mutliv7

Build & Deploy

Compile your kernel

ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- make O=.build_multiv7 -j40

Create a fit image for veyron-jaq that contains the kernel and the device tree

mkimage -D "-I dts -O dtb -p 2048" -f rk3228-veyron-jaq.its arch/arm/boot/vmlinuz

Copy the fit image to your tftp share

scp arch/arm/boot/vmlinuz <tftpserver>:/tftpboot/veyron_jaq