u-boot

mirror of https://github.com/AsahiLinux/u-boot synced 2024-12-02 01:19:49 +00:00

History

Baruch Siach ca1a4c8632 mvebu: select boot device at SoC level Move the gdsys Controlcenter DC specific build time kwbimage.cfg generation code into the mach-mvebu/ directory to be shared by all 32bit mvebu platforms. Remove board specific kwbimage.cfg files, and use the generated one instead. These files are all identical, with two exceptions. Clearfog and Helios4 use the sdio boot device, whereas all others use spi. Update the defconfigs for the exceptional boards to generate the same kwbimage.cfg as before. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Stefan Roese <sr@denx.de>		2018-08-06 14:07:23 +02:00
..
clearfog.c	arm: mvebu: switch clearfog to use device-tree i2c and gpio	2018-06-05 07:29:09 +02:00
MAINTAINERS	arm: mvebu: Add SolidRun ClearFog Armada 38x initial support	2016-01-14 14:08:59 +01:00
Makefile	SPDX: Convert all of our single license tags to Linux Kernel style	2018-05-07 09:34:12 -04:00
README	arm: mvebu: ClearFog: document boot selection switches, update UART	2018-01-09 16:41:00 +01:00

README

Update from original Marvell U-Boot to mainline U-Boot:
-------------------------------------------------------

Generate the U-Boot image with these commands:

$ make clearfog_defconfig
$ make

The resulting image including the SPL binary with the
full DDR setup is "u-boot-spl.kwb".

Now all you need to do is copy this image on a SD card.
For example with this command:

$ sudo dd if=u-boot-spl.kwb of=/dev/sdX bs=512 seek=1

Please use the correct device node for your setup instead
of "/dev/sdX" here!

Boot selection:
---------------

Before powering up the board, boot selection should be done via the SW1 dip
switch (0: OFF, 1: ON):

 - SPI:     00010
 - SD/eMMC: 00111
 - M.2 SSD: 11100
 - UART:    01001 [1]

[1]: According to SolidRun's manual, 11110 should be used for UART booting on
     the ClearFog 'Pro' variant.
     However, this doesn't work (anymore) at least on Rev. 2.1 (but '01001' as
     mentionend for the 'Base' variant does).

Boot from UART:
---------------

Connect the on-board micro-USB (CF Pro: CON11, CF Base: CON5)
to your host.

Set the SW1 DIP switches to UART boot (see above).

Run the following command to initiate U-Boot download:

  ./tools/kwboot -b u-boot-spl.kwb /dev/ttyUSBX

Use the correct UART device node for /dev/ttyUSBX.

When download finishes start your favorite terminal emulator
on /dev/ttyUSBX.