Topic: odd behaviour of uboot...
I've been seeing some odd behaviour in u-boot / linux kernel and the sdcard slots.
- commit 633c219ff923ee6293825e5f8da43ad057e51823 - u-boot-imx6
- commit dd3635dab34fcd65410b6a3513999de379a29d5e - novena-linux
I have two microsd cards (sandisk ultra's, class 10, 8gb).
I have two linux distros, one is debian and one is ubuntu (so i can clearly distinguish which linux i'm in). If i have both sdcard's in their slots I expect the full sized sdcard to become the root and not the microsd card slot.
mmc dev 1 if fatload mmc 1 0x12000000 uImage then fatload mmc 1 0x11ff0000 uImage.dtb setenv bootargs console=ttymxc1,115200 earlyprintk root=/dev/mmcblk1p2 rootwait rootfstype=ext4 splash consoleblank=0 init=/sbin/init else mmc dev 0 fatload mmc 0 0x12000000 uImage fatload mmc 0 0x11ff0000 uImage.dtb setenv bootargs console=ttymxc1,115200 earlyprintk root=/dev/mmcblk0p2 rootwait rootfstype=ext4 splash consoleblank=0 init=/sbin/init fi fdt addr 0x11ff0000; run prep_gbit; run prep_pcie; run prep_senoko; run prep_es8328; run prep_retina; run prep_pixelqi; run prep_hdmi bootm 0x12000000 - 0x11ff0000
I would expect if i don't have the second card slot populated I would get debian, but when i have the second slot populated (the fullsized slot) it would boot into that. However instead of getting the second card too boot, I always end up booting the microsd card, and I can't mount the full sized card at all in the OS to look at what's going on, it's like the first slot got mapped to the second slot. So mounting mmcblk1p2 is really mmcblk0p2. I thought the above had worked at some point. Are there notes on the max/min requirements for booting off the microsd and sd card slots?