[U-Boot] [PATCH 0/6] sunxi: Add second sdcard slot support, including eMMC boot

Hi Ian, et al,

Here is a patch-set adding support for the second sdcard slot found on some sunxi devices. This includes support for eMMC-s connected to sdc2 (so that they are bootable), as found on e.g. the Mele-M3.

For the eMMC case this set also adds support to detect what device we're actually booting from, so that a single u-boot binary can be used to boot from boot the external slot and the eMMC. With this in place you can boot an image from the external sd, and if it works, dd it to the eMMC, and boot from the eMMC, simple as that.

Please review, and let me know if you want me to add it to -next with your acks, or if you're going to push it to -next yourself.

Thanks & Regards,

Hans