mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-22 19:23:07 +00:00
b8916306d1
The original URL that explains the boot mode setting is no longer valid. Update to the new one. Signed-off-by: Fabio Estevam <festevam@gmail.com>
73 lines
1.8 KiB
Text
73 lines
1.8 KiB
Text
How to Update U-Boot on pico-imx6q/dl boards
|
|
--------------------------------------------
|
|
|
|
Required software on the host PC:
|
|
|
|
- UUU: https://github.com/NXPmicro/mfgtools
|
|
|
|
Build U-Boot for pico:
|
|
|
|
$ make mrproper
|
|
$ make pico-imx6_defconfig
|
|
$ make
|
|
|
|
This generates the SPL and u-boot-dtb.img binaries.
|
|
|
|
1. Loading U-Boot via USB Serial Download Protocol
|
|
|
|
Note: This method is convenient for development purposes.
|
|
If the eMMC has already a U-Boot flashed then the user can
|
|
go to step 2 below in order to update U-Boot.
|
|
|
|
Put pico board in USB download mode (Refer to the following link for details:
|
|
https://developer.technexion.com/docs/pico-evaluation-kit-boot-mode-settings )
|
|
|
|
Connect a USB to serial adapter between the host PC and pico.
|
|
|
|
Connect a USB cable between the OTG pico port and the host PC.
|
|
|
|
Open a terminal program such as minicom.
|
|
|
|
Copy SPL and u-boot-dtb.img to the uuu folder.
|
|
|
|
Load the U-Boot via USB:
|
|
|
|
$ sudo ./uuu -v uuu_script
|
|
|
|
where uuu_script contains the following:
|
|
|
|
SDP: boot -f SPL
|
|
SDPU: write -f u-boot-dtb.img -addr 0x10000000
|
|
SDPU: jump -addr 0x10000000
|
|
|
|
Then U-Boot starts and its messages appear in the console program.
|
|
|
|
Use the default environment variables:
|
|
|
|
=> env default -f -a
|
|
=> saveenv
|
|
|
|
2. Flashing U-Boot into the eMMC
|
|
|
|
The default U-Boot environment expects the use of eMMC user
|
|
partition. To ensure we are using the proper eMMC partition for boot,
|
|
please run:
|
|
|
|
=> mmc partconf 0 0 0 0
|
|
|
|
Next, run the DFU agent so we can flash the new images using dfu-util
|
|
tool:
|
|
|
|
=> dfu 0 mmc 0
|
|
|
|
Flash SPL and u-boot-dtb.img into the eMMC running the following commands on a PC:
|
|
|
|
$ sudo dfu-util -D SPL -a spl
|
|
|
|
$ sudo dfu-util -D u-boot-dtb.img -a u-boot
|
|
|
|
Remove power from the pico board.
|
|
|
|
Put pico board into normal boot mode.
|
|
|
|
Power up the board and the new updated U-Boot should boot from eMMC.
|