u-boot

mirror of https://github.com/AsahiLinux/u-boot synced 2024-12-12 22:33:18 +00:00

History

Jon Nettleton 4ea813d333 arm: mvebu: switch clearfog to use device-tree i2c and gpio This switches the clearfog boards to use DM based gpio and i2c drivers. The io expanders are configured via their device-tree entries. Signed-off-by: Jon Nettleton <jon@solid-run.com> [baruch: add DT i2c aliases] Signed-off-by: Baruch Siach <baruch@tkos.co.il> Reviewed-by: Chris Packham <judge.packham@gmail.com> Reviewed-by: Stefan Roese <sr@denx.de> Signed-off-by: Stefan Roese <sr@denx.de>		2018-06-05 07:29:09 +02:00
..
clearfog.c	arm: mvebu: switch clearfog to use device-tree i2c and gpio	2018-06-05 07:29:09 +02:00
kwbimage.cfg	arm: mvebu: clearfog: fix chip name comment	2017-07-12 06:57:55 +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.