I want to set imx6q-sdb board boot from spi flash.
I weld a chip on another board and connect it to SPI3(imx6q's pin:DISP0_DAT0, DISP0_DAT1,DISP0_DAT2,DISP0_DAT3(spi:ss0)) .
And then modify linux kernel driver.When CPU boot up form eMMC,SPI-flash work well.I also can burn u-boot image to SPI-flash successfully.
But now CPU can not boot from SPI-flash.
I do not modify the board anything.
I find four pin(EIM_LBA:BT_CFG4_2 EIM_EB0:BT_CFG4_3 EIM_EB1:BT_CFG4_4 EIM_RW:BT_CFG4_5) hold on high level when power up and CPU do not boot up.Does it normal?
What do I need to do for booting form SPI3.