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board/andes/ae350/readme.txt: add bootloader/DT flashing instructions

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Add a section to document how to update bootloader on AE350 platforms
with SPI_burn tool.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Yu-Chien Peter Lin 2024-09-25 15:21:51 +08:00 committed by Thomas Petazzoni
parent 04892eca63
commit a51a55262d
1 changed files with 43 additions and 0 deletions
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board/andes/ae350/readme.txt
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@ -41,6 +41,49 @@ After building, you should obtain the following files:
|-- u-boot-spl.bin
`-- u-boot.itb
How to update the bootloader and device-tree
============================================
To update the bootloader and device tree, make sure you have
an ICEman (Andes OpenOCD [1]) and AICE [2] connection set up
as below:
Local Host Local/Remote Host
.-----------------. .--------------.
| buildroot images| | |
| | ICEman host <IP:PORT>
| .----------. | | .--------. |
| | SPI_burn |<---+--socket--+->| ICEman | |
| '----------' | | '--.-----' |
'-----------------' '-----|--------'
|
USB
.--------------. |
| target | .-----v-----.
| board <----JTAG---| AICE |
| | '-----------'
'--------------'
[1] https://github.com/andestech/ICEman
[2] https://www.andestech.com/en/products-solutions/andeshape-platforms/aice-micro/
The Andes SPI_burn tool will be located in output/host/bin. Use
the following commands to update the bootloader and device tree:
$ SPI_burn --host $ICE_IP --port $ICE_BURNER_PORT --addr 0x0 -i u-boot-spl.bin
$ SPI_burn --host $ICE_IP --port $ICE_BURNER_PORT --addr 0x10000 -i u-boot.itb
$ SPI_burn --host $ICE_IP --port $ICE_BURNER_PORT --addr 0xf0000 -i ae350_ax45mp.dtb
Note that the --addr option specifies the offset starting from
the flash base address 0x80000000 and set by U-Boot configurations.
e.g.
u-boot-spl.bin : CONFIG_SPL_TEXT_BASE=0x80000000
u-boot.itb : CONFIG_SPL_LOAD_FIT_ADDRESS=0x80010000
ae350_ax45mp.dtb: CONFIG_SYS_FDT_BASE=0x800f0000
How to write the SD card
========================
Copy the sdcard.img to a SD card with "dd":
$ sudo dd if=sdcard.img of=/dev/sdX bs=4096