[Skiboot] [PATCH] console(lpc/fsp-console): Use just stdout-path.

[ppaidipe]

On 2018-03-02 15:14, Michael Ellerman wrote:
> Oliver <oohall at gmail.com> writes:
> 
>> On Fri, Mar 2, 2018 at 4:10 AM, ppaidipe <ppaidipe at linux.vnet.ibm.com> 
>> wrote:
>>> On 2018-03-01 12:36, Stewart Smith wrote:
>>>> 
>>>> Pridhiviraj Paidipeddi <ppaidipe at linux.vnet.ibm.com> writes:
>>>>> 
>>>>> dtc tool complaining about below warning as usage of 
>>>>> linux,stdout-path
>>>>> property under /chosen node is deprecated.
>> 
>> Hmm, dtc is largely intended for the embedded community who have the
>> ability to fix up the DTB to better match what a specific kernel
>> versions expects while we don't have that luxury.
> 
> That's not universally true even for embedded folks, in some cases the
> DTB is tied to the boot loader, not the kernel. Though some of the
> people doing that would not expect to update the kernel ever.
> 
>> We need to ensure old kernels will continue to boot with a newer
>> skiboot so we're forced to keep the "deprecated" parts of the DT
>> around. IMO the warning is kind of bogus for our situation so we might
>> want to look at adding a switch to dtc so that it complains less about
>> this sort of issue.

Yes, I sent a V2 
https://lists.ozlabs.org/pipermail/skiboot/2018-March/010634.html
which is merged now, which keep's deprecated one for P8 as it is and 
added new property
across cpus to fix the dtc warning.

> 
> Yeah, we should try to update when we can, but we need to be careful.
> 
> This patch could have broken a bunch of old kernels, which we may not
> have noticed for a while, and which would have been hard to debug, just
> to squelch a dubious warning.
> 
> cheers