U-Boot for the Purism Librem5 phone

Quick Start

  • Build the ARM Trusted firmware binary

  • Get ddr and hdmi firmware

  • Build U-Boot

Get and Build the ARM Trusted firmware

Note: srctree is U-Boot source directory Get ATF from: branch: librem5

$ make PLAT=imx8mq CROSS_COMPILE=aarch64-linux-gnu- bl31
$ cp build/imx8mq/release/bl31.bin $(builddir)

Get the ddr and display port firmware

$ wget
$ chmod +x firmware-imx-8.15.bin
$ ./firmware-imx-8.15.bin
$ cp firmware-imx-8.15/firmware/hdmi/cadence/signed_dp_imx8m.bin $(builddir)
$ cp firmware-imx-8.15/firmware/ddr/synopsys/lpddr4*.bin $(builddir)

Build U-Boot

$ export CROSS_COMPILE=aarch64-linux-gnu-
$ make librem5_defconfig
$ make ARCH=arm

Burn the flash.bin

Use uuu to burn flash.bin. Power on the phone while holding vol+ to get it into uuu mode.

$ git clone
$ cd librem5-devkit-tools
$ cp $(builddir)/flash.bin files/u-boot-librem5.imx
$ uuu uuu_scripts/u-boot_flash_librem5.lst

Reboot the phone.