Here are the commands I am running to try to flash a new image into the SPI NOR flash on a v1.72 board:
# ./rkdeveloptool ld
DevNo=1 Vid=0x2207,Pid=0x330c,LocationID=101 Maskrom
# ./rkdeveloptool db rk3399_loader_spinor_v1.15.114.bin
Downloading bootloader succeeded.
# ./rkdeveloptool rfi
Read Flash Info failed!
These same steps work on the older 4B v1.4 board and show me the SPI chip information.
Do I need a new loader bin to be able to update the SPI flash using the OTG port on the v1.72 boards?