The NXP 4.1 kernel needs to boot with secure boot.

Add information on how to enable secure boot mode.

Signed-off-by: Vanessa Maegima vanessa.maegima@nxp.com --- board/technexion/pico-imx7d/README | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)

diff --git a/board/technexion/pico-imx7d/README b/board/technexion/pico-imx7d/README index a2805ee..8af4eff 100644 --- a/board/technexion/pico-imx7d/README +++ b/board/technexion/pico-imx7d/README @@ -47,3 +47,20 @@ Remove power from the pico board. Put pico board into normal boot mode.

Power up the board and the new updated U-Boot should boot from eMMC. + +Building U-Boot to boot with NXP 4.1 kernel: + +The NXP 4.1 kernel boots only in secure boot mode on mx7. + +Follow the next steps to enable secure boot: + +$ make mrproper +$ make pico-imx7d_defconfig +$ make menuconfig + -> ARM architecture + -> [*] Enable support for booting in non-secure mode + -> [*] Boot in secure mode by default + -> Exit +$ make + +Flash u-boot.imx using the imx_usb_loader tool.