LS1046A

(1)U587 

1: off 

2: off 

 S1 

1: on 

2: on 

3: off 

4: on 

5: on 

6: on 

7: off 

8: on 

9: on 

10: on 

(2) USB flash drive with two partitions First partition: FAT-32 recommended to store Linux kernel/device tree blob/etc. Second partition: EXT-4 used for rootfs 

(3) Extract the ubuntu rootfs to second partition 

sudo mount /dev/sd?2 /mnt 

cd /mnt sudo tar xf rootfs_lsdk2012_ubuntu_main_arm64.tgz 

sudo umount /mnt 

U-boot 

(1) Power on the board and stop in u-boot command prompt 

(2) Run the following command to => mmc rescan 

(3) Use the following command to set bootargs to use USB rootfs 

=> setenv bootargs root=/dev/sda2 rw rootwait rootfstype=ext4 earlycon=uart8250,mmio,0x21c0500 console=ttyS0,115200 loglevel=8 nohz=off 

 (4) Use the following commands to load Linux kernel and device tree blob from USB 

=> usb start 

=> fatload usb 0:1 0x8f000000 fsl-ls1046a-db-sdk.dtb 

=> fatload usb 0:1 0x81000000 Image (5) Use the following command to boot the Linux kernel 

=> booti 0x81000000 - 0x8f000000