[U-Boot] [bug report] sunxi: booting from eMMC

[Alexandr Bochkarev]

Replace emmc to sd card, on sdc2 lines. Remove sd on sdc0, works like a charm, but with emmc not success((((

>>U-Boot SPL 2016.11-rc1-g4dc34be (Nov 04 2016 - 03:06:54)
>>DRAM: 1024 MiB
>>CPU: 912000000Hz, AXI/AHB/APB: 3/2/2
>>Trying to boot from MMC2

>>U-Boot 2016.11-rc1-g4dc34be (Nov 04 2016 - 03:06:54 +0600) Allwinner Technology

>>CPU:   Allwinner A20 (SUN7I)
>>Model: Cubietech Cubieboard2
>>…………...

> 
> 
> Cubieboard2 - A20:
> 
> U-Boot with Cubieboard_defconfig and mmc extra slot config set to 2
> EMMC on sdc2 lines
> EMMC works from linux with 4-bit bus width, if boot from SD card on sdc0 lines
> 
> U-Boot output:
>>> Trying to boot from MMC2 
>>> mmc_load_image_raw_sector: mmc block read error 
>>> SPL: failed to boot from all boot devices 
>>> ### ERROR ### Please RESET the board ###