[U-Boot] sunxi board: why MMC dev are swapped ?

[Maxime Ripard]

Adding hans to the recipient list

Maxime

On Fri, Nov 11, 2016 at 07:33:43PM +0100, Mylene Josserand wrote:
> Hi everyone,
> 
> 
> I am currently using FEL and Fastboot to flash a sunxi-device with SPL and
> u-boot.
> 
> 
> In my board, I have two MMC devices: a MMC slot and an eMMC.
> 
> My use-case is to flash an empty device. I want to use FEL to boot a u-boot
> and then, use fastboot to flash u-boot into eMMC.
> 
> When I am using an u-boot via FEL, the eMMC is configured as MMC1. To be
> able to flash u-boot on it, I need to set CONFIG_FASTBOOT_FLASH_MMC_DEV to
> 1. Thanks to that, the flashboot command is working fine.
> But when I am booting on my fresh u-boot from eMMC, it is now configured as
> MMC0 and not MMC1 anymore.
> 
> It produces some problems in my case as I configured the
> CONFIG_FASTBOOT_FLASH_MMC_DEV to 1 so I can not use fastboot anymore to
> flash the eMMC (as, now, fastboot is trying to flash u-boot on my MMC slot
> and not my eMMC). This is clearly not what I wanted to. I would like to use
> fastboot to flash the same MMC device: eMMC.
> 
> This issue is located in this part of the code:
> http://git.denx.de/?p=u-boot.git;a=blob;f=board/sunxi/board.c;h=53656383d512199338dcdc1d4fdc4f7f939c9b61;hb=HEAD#l377
> 
> Do you know why sunxi boards have this behavior ? Why this MMC device's swap
> is implemented ?
> 
> Thank you in advance for your help,
> 
> Best regards,
> 
> -- 
> Mylène Josserand, Free Electrons
> Embedded Linux and Kernel engineering
> http://free-electrons.com

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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