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u-boot-brain/board/solidrun/clearfog
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Chris Packham e6f61622d3 ARM: mvebu: a38x: restore support for setting timing 
This restores support for configuring the timing mode based on the
ddr_topology. This was originally implemented in commit 90bcc3d38d
("driver/ddr: Add support for setting timing in hws_topology_map") but
was removed as part of the upstream sync.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2018-05-14 10:01:56 +02:00
..
clearfog.c ARM: mvebu: a38x: restore support for setting timing 2018-05-14 10:01:56 +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.