BTW the thread you referenced is referring to booting from the emmc not the
SD. The original author wanted to use the SD as just memory space.
Somewhere in there a number of people comment that -
"latest uboot has changed behaviors, and no longer requires the button
press to boot from the SD"
So does this mean the uboot on the emmc or on the sd card. I have the
latest on the sd card. The emmc has what came with it which was two weeks
ago. Do I just need to update the emmc boot files?
This seems to be an oft asked question. I don't think it has anything to do
with a specific OS but rather the uboot code on the emmc and/or SDcard.
Isn't there one place where this is answered without a lot of argument as
to how to do it?
On Friday, April 18, 2014 10:47:57 AM UTC-4, Doug wrote:
>
> I have ArchLinux installed and it reboots fine - shutdown -r now - but if
> I power down and restart it goes to four LED's and stops. If I hold down
> the boot button and power it will then boot.
>
> How do I get it to boot at power up always from the SD card? My boot
> partition has the following files -
>
> 102 -rwxr-xr-x 1 root root 104212 Aug 10 2013 MLO
> 354 -rwxr-xr-x 1 root root 361488 Aug 10 2013 u-boot.img
> 2 -rwxr-xr-x 1 root root 603 Oct 18 2013 uEnv.txt
>
> and uEnv.txt has -
>
> [root@BBBdoug mnt]# cat uEnv.txt
> uenvcmd=run findmmc1; run findmmc0; if run loaduimage; then run loadfdt;
> run mmcboot; fi;
> findmmc1=if test $board_name = A335BNLT; then setenv mmc1 1; else setenv
> mmc1 0; fi
> findmmc0=setenv mmcdev 0; mmc dev ${mmcdev}; if mmc rescan; then setenv
> mmc0 1; else setenv mmc0 0; fi
> mmcroot=/dev/mmcblk0p2 rw
> loadfdt=ext4load mmc ${mmcdev}:2 ${fdtaddr} /boot/dtbs/${fdtfile}
> loaduimage=if ext4load mmc 0:2 ${loadaddr} /boot/zImage; then setenv
> mmcdev 0; else setenv mmcdev 1; if test $mmc0 = 1; then setenv mmcroot
> /dev/mmcblk1p2 rw; fi; ext4load mmc 1:2 ${loadaddr} /boot/zImage; fi
> optargs=coherent_pool=1M
>
> As far as I can tell this is the latest code.
>
> What do I need to do to get it to always boot without intervention from
> the micoSD card?
>
>
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