We are using sabrelite board and would like to boot the board from SD card. There are binaries provided by linaro (iMX6DQ_SPI_to_uSDHC3.bin and iMX6DQ_SPI_to_uSDHC4.bin) and it is working fine. But I would like to know what this binary file is exactly doing (how this binary makes the board to boot from sd card)?
I have referred Minimal boot-loader for IMX6 Sabrelite where they mentioned that this binary writes two registers. What are those registers and if possible can I get the source code of these binaries or atleast the working?
Jai Ganesh S