Re: [RESEND] [PATCH v2 1/2] arm: devtree: Set system_rev from DT revision

["Pali Rohár" <pali.rohar@gmail.com>]

On Wednesday 24 June 2015 22:01:38 Tony Lindgren wrote:
> * Pali Rohár <pali.rohar@gmail.com> [150506 04:45]:
> > On Wednesday 06 May 2015 13:04:01 Arnd Bergmann wrote:
> > > > 
> > > > It needs to be done in this code, so "system_rev" variable is set
> > > > properly...
> > > 
> > > What I mean is which code accesses this variable that early?
> > > 
> > 
> > ATAG code is doing it at same early stage, so I added it to same early
> > stage...
> 
> Yes we should do this early like the other atags.
>  
> > > > > Also, it seems strange to have a string property and then use kstrtouint
> > > > > to convert it into a number. I think it should either be specified in a DT
> > > > > binding to be a string and then have the kernel not assume that it is a number,
> > > > > or we should define it to be binary.
> > > > > 
> > > > >       Arnd
> > > > 
> > > > Variable "system_rev" is number and it always was. So chaning type will
> > > > break more parts.
> > > > 
> > > > And it is string DT property to be human readable. Some other developers
> > > > suggested for v2 to change it to string (from number).
> > > 
> > > Both of them would be human readable, you just use something else to
> > > read them ;-)
> > > 
> > > If we have a string here, we should just change all uses of system_rev
> > > in the kernel accordingly, there are only a few of them:
> 
> Let's just keep it as a hex as it was. After all it's an existing
> interface in /proc that user space programs may expect to be in
> hex format already.
> 
> Pali, care to repost the whole set again right after -rc1 with
> with rev property naming and documentation added? Just keep it
> as hex and let's forget any string conversion.
> 
> Regards,
> 
> Tony

Ok, but what do you mean to forget any string conversion?

-- 
Pali Rohár
pali.rohar@gmail.com