U-Boot for Anbernic RGxx3 Devices¶
This allows U-Boot to boot the following Anbernic devices:
Anbernic RG353M
Anbernic RG353P
Anbernic RG353V
Anbernic RG353VS
Anbernic RG503
The correct device is detected automatically by comparing ADC values from ADC channel 1. In the event of an RG353V, an attempt is then made to probe for an eMMC and if it fails the device is assumed to be an RG353VS. Based on the detected device, the environment variables “board”, “board_name”, and “fdtfile” are set to the correct values corresponding to the board which can be read by a boot script to boot with the correct device tree.
Please note that there are some versions of the RG353 devices with different panels. Panel auto-detection is planned for a later date.
Building U-Boot¶
$ export CROSS_COMPILE=aarch64-none-elf-
$ export BL31=../rkbin/bin/rk35/rk3568_bl31_v1.34.elf
$ export ROCKCHIP_TPL=../rkbin/bin/rk35/rk3568_ddr_1056MHz_v1.13.bin
$ make anbernic-rgxx3_defconfig
$ make
This will build u-boot-rockchip.bin
which can be written to an SD
card.
Image installation¶
Write the u-boot-rockchip.bin
to an SD card offset 32kb from the
start.
$ dd if=u-boot-rockchip.bin of=/dev/mmcblk0 bs=512 seek=64