u-boot

mirror of https://github.com/AsahiLinux/u-boot synced 2024-12-03 18:10:13 +00:00

History

Tom Rini 275906dc1b pico-pi: Add Otavio as maintainer Update the MAINTAINERS file to list Otavio Salvador as the maintainer for this board. Acked-by: Otavio Salvador <otavio@ossystems.com.br> Signed-off-by: Tom Rini <trini@konsulko.com>		2018-07-31 14:47:01 -04:00
..
Kconfig	pico-imx7d: Add initial support	2017-05-31 09:58:40 +02:00
MAINTAINERS	pico-pi: Add Otavio as maintainer	2018-07-31 14:47:01 -04:00
Makefile	pico-imx7d: Add SPL support	2018-07-23 10:59:48 +02:00
pico-imx7d.c	pico-imx7d: Add SPL support	2018-07-23 10:59:48 +02:00
README	pico-imx7d: README: Drop old instructions about secure mode	2018-07-23 10:59:48 +02:00
spl.c	pico-imx7d: Do not override addrmap5	2018-07-23 10:59:48 +02:00

README

How to update U-Boot on pico-imx7d board
----------------------------------------

Required software on the host PC:

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

Build U-Boot for pico:

$ make mrproper
$ make pico-imx7d_defconfig
$ make

This generates the U-Boot binary called u-boot.imx.

Put pico board in USB download mode (refer to the PICO-iMX7D Quick Start Guide
page 3)

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 u-boot.imx to the imx_usb_loader folder.

Load u-boot.imx via USB:

$ sudo ./imx_usb u-boot.imx

Then U-Boot starts and its messages appear in the console program.

Use the default environment variables:

=> env default -f -a
=> saveenv

Run the DFU agent so we can flash the new images using dfu-util tool:

=> dfu 0 mmc 0

Flash SPL into the eMMC:

$ sudo dfu-util -D SPL -a spl

Flash u-boot.img into the eMMC:

$ sudo dfu-util -D u-boot.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.