emmc Boot on i.MX7D Sabre board

[hyoungkikim]

hi 

i assembled emmc on imx7d sabre board  and with  sd-booting , i can access an emmc 

and write data to emmc bootpartion0 ,  but if set bootdevice to eMMC , it doesn't boot

i read about  u-boot  mmc  partconf and bootbus  sub commands but not fully understand 

what options should i use ?   and   does BT_CFG[6:4] of SW2  have relation with bootbus option ?

thank you in advance 

sincerely

[Rita_Wang · Accepted solution]

Yes, when boot from the emmc, the boot mode should change, you need to modify the BT_CFG[5:4],BT_CFG[11] and BT_CFG[13:12] for emmc boot up. Boot mode should be right.