[U-Boot] [PATCH] mx31: Improve the handling of unidentified silicon version

[Graeme Russ <graeme.russ@gmail.com>]

On 15/06/11 22:49, Wolfgang Denk wrote:
> Dear Graeme Russ,
> 
> In message <4DF8A694.3030208@gmail.com> you wrote:
>>
>> But as Fabio has pointed out, the '2.0' in 'rev 2.0' is not srev - This
>> highlights the root of the problem - (srev == 0x20) != (rev 2.0)
> 
> But everybody who spends half a minute on the problem can easily
> determine this, without adding code for an exotic error case.

Only if they know '(unknown)' changes the meaning of 'rev' to 'srev' - And
that's the problem. If you don't have access to the code (or some fine
documentation) how will you know that 'rev 2.0 (unknown)' means you need to
search the SOC manual for 'srev == 0x20'

> It's not any new information that gets printed, it's just minimally
> differently formatted.

It is more information - In the known case, you are printing
mx31_cpu_type[i].v in the unknown case, you are printing srev

Now I personally think that in itself is a no-no, but fixing it would mean
doing something like:

CPU:   Freescale i.MX31 rev 2.0 (srev = 0x32) at 531 MHz.Reset cause: WDOG
for the known case

and

CPU:   Freescale i.MX31 unknown rev 0.0 (srev = 0x20) at 531 MHz.Reset
cause: WDOG

for the unknown case - Oops, we hit 80 characters :(

Regards,

Graeme