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u-boot/board/warp7
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Fabio Estevam 473466a5c4 warp7: Remove UART initialization code 
With DM_SERIAL selected, it is no longer needed board code to
initialize the UART.

Describe the nodes that require dm-pre-reloc, which allows
the DM model to configure the UART pinctrl early.

Remove the now unneeded board UART initialization.

Signed-off-by: Fabio Estevam <festevam@denx.de>
2022-04-12 15:36:18 +02:00
..
imximage.cfg imx: Don't define __ASSEMBLY__ in source files 2022-02-08 23:07:58 -05:00
Kconfig warp7, pic32mzdask: Remove SYS_FDT_ADDR/SYS_ENV_ADDR from CONFIG namespace 2021-12-27 16:20:18 -05:00
MAINTAINERS MAINTAINERS: Use my personal e-mail address 2021-04-08 20:29:53 +02:00
Makefile SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
README WS cleanup: remove trailing white space 2021-09-30 08:08:56 -04:00
warp7.c warp7: Remove UART initialization code 2022-04-12 15:36:18 +02:00

README 

How to Update U-Boot on Warp7 board
----------------------------------

Required software on the host PC:

- imx_usb_loader: https://github.com/boundarydevices/imx_usb_loader

- dfu-util: http://dfu-util.sourceforge.net/releases/ (if you are in a
Debian distribution then you can get it via libdfu-dev package)

- libusb: http://libusb.org/ (if you are in a Debian distribution
then you can get it via libusb-dev and libusb-1.0-0-dev)

In U-Boot folder, build U-Boot for Warp7:

$ make mrproper
$ make warp7_config
$ make

This will generate the U-Boot binary called u-boot-dtb.imx.

Put warp7 board in USB download mode:

Remove the CPU board from the base board then put switch 2 in the upper
position

Connect a USB to serial adapter between the host PC and warp7

Connect a USB cable between the OTG warp7 port and the host PC

Copy u-boot-dtb.imx to the imx_usb_loader folder.

Load u-boot-dtb.imx via USB:

$ sudo ./imx_usb u-boot-dtb.imx

Then U-Boot should start and its messages will appear in the console program.

Open a terminal program such as minicom

Use the default environment variables:

=> env default -f -a
=> saveenv

Run the DFU command:
=> dfu 0 mmc 0

Transfer u-boot-dtb.imx that will be flashed into the eMMC:

$ sudo dfu-util -D u-boot-dtb.imx -a boot

Then on the U-Boot prompt the following message should be seen after a
successful upgrade:

#DOWNLOAD ... OK
Ctrl+C to exit ...

Remove power from the warp7 board.

Put warp7 board into normal boot mode (put the switch 2 in the lower position)

Power up the board and the new updated U-Boot should boot from eMMC