METHOD1. u-boot from rockchip source works, by following steps: a) git clone: https://github.com/linux-rockchip/u-boot-rockchip.git b) make c) ./upgrade_tool UL RK3288UbootLoader_V2.19.01.bin d) reset board

METHOD2. u-boot-2016.05-rc1 download from u-boot official website doesn't work: a) Download source code. b) make firefly-rk3288_defconfig c) make

Then I tried with following methods/tools to flash binary file, unfortunately none works: i) rkflashtool Followed instruction in <uboot-src>/doc/README.rockchip, such as:

./firefly-rk3288/tools/mkimage -n rk3288 -T rkimage -d \ ./firefly-rk3288/spl/u-boot-spl-dtb.bin out && \ cat out | openssl rc4 -K 7c4e0304550509072d2c7b38170d1711 | rkflashtool l

ii) rkflashkit ./rkflashkit flash @uboot <binary-file>

iii) upgrade_tool STEP1: Merge essential header files? Otherwise upgrade_tool refuse to upgrade. ./tools/boot_merger ./tools/rk_tools/RKBOOT/custom-RK3288.ini STEP2: ./upgrade_tool UL <binary-file>

I just want to add ethernet support in u-boot. Any advice and suggestions will be greatly appreciated.