We don't need a full checkout of Chrome OS to build U-Boot with Chromium OS verified boot. Update the instructions accordingly and fix a typo which joins the output directory and defconfig.

Signed-off-by: Simon Glass sjg@chromium.org ---

doc/README.chromium | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/doc/README.chromium b/doc/README.chromium index 096bc4f1f7f..8f67da6c728 100644 --- a/doc/README.chromium +++ b/doc/README.chromium @@ -33,12 +33,18 @@ To obtain: cd u-boot git checkout cros-master

+ cd .. + git clone https://chromium.googlesource.com/chromiumos/platform/vboot_reference + cd vboot_reference + git checkout 45964294 + # futility: updater: Correct output version for Snow + To build for sandbox:

UB=/tmp/b/chromeos_sandbox # U-Boot build directory - CROS=/home/sglass/cosarm # Chromium OS directory - make O=$UB/chromeos_sandbox_defconfig - make O=$UB -j20 -s VBOOT_SOURCE=$CROS/src/platform/vboot_reference \ + cd u-boot + make O=$UB chromeos_sandbox_defconfig + make O=$UB -j20 -s VBOOT_SOURCE=/path/to/vboot_reference \ MAKEFLAGS_VBOOT=DEBUG=1 QUIET=1

Replace sandbox with another supported target.