On Tue, Dec 20, 2016 at 08:58:50PM +0800, CARL DONG wrote: > I see that "Boundary Devices SABRE Lite/BD-SL-i.MX6" is listed as supported > on the armv7 page, but I'm unable to get it working because of the EFI > interface requirement for the firmware. > > 1. `run findfdt` outputs `## Error: "findfdt" not defined` > 2. `bootefi` is an unknown command > > I believe this is because the device was shipped with U-Boot > 2015.07-15072-g45cfc85, and the latest branch the vendor's released is > based on v2016.03 ( > https://github.com/boundarydevices/u-boot-imx6/tree/boundary-v2016.03). > According to 'INSTALL.armv7', we need U-Boot 2016.07 or newer. > > Would love to know if there are other ways to boot in.
Yes. You need to use the u-boot from ports. iirc there is no way on
the sabre lite to start u-boot from an SD card or from the the net;
you first need to flash it using the 'upgradeu' command from the
shipped U-Boot that will read a file called 'u-boot.imx' on the SD
card and flash it.
I have a sabre lite board running at home. My notes below are from
last july. I haven't tried to upgrade to a more recent u-boot. Things
may have changed a bit.
Once you have a working u-boot flashed, you will need to hack a
'6x_bootscript' boot script a bit to actually launch the EFI boot
program.
Here is my 6x_bootscript.txt:
---cut---
load ${dtype} ${disk}:1 0x13000000 imx6q-sabrelite.dtb
load ${dtype} ${disk}:1 0x10800000 efi/boot/bootarm.efi
bootefi 0x10800000 0x13000000
echo "Error loading uefi boot loader"
---cut---
I converted it to a u-boot script using the following command:
mkimage -A arm -T script -C none -n 'boot script' -d 6x_bootscript.txt
6x_bootscript
and copied it in the DOS partition of my hard-drive.
Note: If flashing U-boot fails, you need a windows or Linux machine to
unbrick it :
https://boundarydevices.com/unbricking-nitrogen6x-sabre-lite-i-mx6-board/
https://www.element14.com/community/community/designcenter/single-board-computers/sabrelite/blog/2014/04/01/getting-started-with-sabre-lite-imx6
I needed that unbrick procedure a number of times before I got u-boot
working. So make sure to get familiar with the procedure before
starting...
--
Matthieu Herrb
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