[U-Boot] FPGA detection failure on Cyclone V soc development kit

[Måns Rullgård]

Tom Rini <trini at konsulko.com> writes:

> On Wed, Jan 20, 2016 at 08:31:30PM +0000, Måns Rullgård wrote:
>
>> I'm having a problem with u-boot 2016.01 failing to detect the FPGA on
>> my Altera Cyclone V SoC Development Kit.  On startup, it simply prints
>> "FPGA: Not Altera chip ID" (the ID having been read as all-zero).  No
>> amount of messing with jumpers or switches makes a difference.  The
>> software on the SD card included in the box appears to work, so on a
>> whim I took the SPL pre-loader from this card and combined it with the
>> main 2016.01 u-boot.  This makes the detection succeed, despite Marek
>> baulking at this idea.  The "good" SPL identifies as "U-Boot SPL
>> 2013.01.01 (Dec 04 2014 - 08:59:41)" which is a different build date
>> than the main u-boot on the same SD card, so which source code version
>> it was built from is anyone's guess.
>> 
>> What's interesting is that Marek's board works with u-boot 2016.01 while
>> mine fails even with the very same binary.  The boards are different
>> revisions (his 100-0321003-C1, mine -E1), and the main Cyclone V chips
>> are also different (his 5CSXFC6D6F31C8NES, mine 5CSXFC6D6F31C6N).
>> 
>> Any suggestions for what to try next?
>
> v2016.01 release or to of tree?  If top of tree, try
> http://patchwork.ozlabs.org/patch/570009/

Tried release, top of tree, and top of tree with that patch.  Nothing
works.

-- 
Måns Rullgård