Building U-Boot for i.MX RT10XX targets

/wiki/spaces/IRD/pages/350748688 explains how to install the U-Boot firmware to the board for the first time. Having installed U-Boot, U-Boot is immediately available on the I.MX RT10XX board as a primary firmware monitor.

The default U-Boot configuration is a capable Linux bootloader so typically our customers do not require re-building and re-installing U-Boot. However, certain projects still do require customizations to the U-Boot firmware, which implies making changes to the U-Boot code, rebuilding the U-Boot binary and then updating it on the RT10XX board.

Building U-Boot

The full U-Boot source for the NXP i.MX RT10XX EVK board is included in the software distribution available from the Emcraft web site. Refer to the u-boot/ sub-directory in the software distribution tree.

The key board specific-configuration files for the NXP i.MX RT1050 EVK board are as follows:

u-boot/configs/imxrt1050-evk-sdcard_defconfig - default U-Boot configuration;
u-boot/include/configs/imxrt1050-evk.h - configuration options;
u-boot/board/freescale/imxrt1050-evk/imxrt1050-evk.c - board-specific initialization code.

The key board specific-configuration files for the NXP i.MX RT1060 EVK board are as follows:

u-boot/configs/imxrt1060-evk-sdcard_defconfig - default U-Boot configuration;
u-boot/include/configs/imxrt1050-evk.h - configuration options;
u-boot/board/freescale/imxrt1050-evk/imxrt1050-evk.c - board-specific initialization code.

Step through the following procedure to build U-Boot for the NXP i.MX RT1050 EVK board:

On the Linux development host, activate the cross-build environment as described in Installing and Activating Cross Development Environment:
$ . ./ACTIVATE.sh
Change to the U-Boot top directory:
$ cd u-boot
Configure U-Boot for the NXP i.MX RT1050 EVK board:
$ make mrproper
$ make imxrt1050-evk-sdcard_defconfig
Run make to create the U-Boot binaries (SPL and u-boot.img):$ make -s

Step through the following procedure to build U-Boot for the NXP i.MX RT1060 EVK board:

On the Linux development host, activate the cross-build environment as described in Installing and Activating Cross Development Environment:
$ . ./ACTIVATE.sh
Change to the U-Boot top directory:
$ cd u-boot
Configure U-Boot for the NXP i.MX RT1060 EVK board:
$ make mrproper
$ make imxrt1060-evk-sdcard_defconfig
Run make to create the U-Boot binaries (SPL and u-boot.img):
$ make -s