[PATCH] clkdev: add support to lookup for early platform device

[Jean-Christophe PLAGNIOL-VILLARD]

On 12:35 Thu 28 Apr     , Magnus Damm wrote:
> On Thu, Apr 28, 2011 at 12:20 PM, Jean-Christophe PLAGNIOL-VILLARD
> <plagnioj at jcrosoft.com> wrote:
> >> > > > >
> >> > > > Are you willfully ignoring the init_name handling in
> >> > > > early_platform_driver_probe_id() or something?
> >> > > >
> >> > > > See a636ee7fb35b731ba2b331f6294e809bb6be09c8 for example.
> >> > > excatly but the issue is that the slab is not availlable yet
> >> > > see 06fe53beb636294587d8e94ef83c06cef07c21fd
> >> > > so init_name is still NULL :(
> >> > >
> >> > This is a non-argument until you demonstrate a use case where we have a
> >> > reasonable expectation for the clock framework to be available and the
> >> > slab allocator not.
> >> >
> >> > If you're thinking about the SH earlyprintk case then I suggest you look
> >> > at the sh-sci driver to see how we presently deal with the situation
> >> > there.
> >> the sh-sci driver expect the clock will enable for him
> >> which did IIRC Magnus on sh-mobile
> >> I do not want to do so
> >>
> >> I've unfortunatly on at91 I use the early device during the map_io
> 
> But so do we on SH-Mobile ARM.
> 
> >> so the slab is available and bootmem either
> > sorry none of theem is available yet
> 
> Sounds like you are aiming to use earlyprintk a little bit too early,
> or perhaps your idea of using clocks that early on is what is causing
> you trouble?
> 
> Why don't you move down your earlyprintk setup to a time when you have
> slabs available? Or for clocks, in the sh-sci driver we don't deal
> with clocks in the earlyprintk case.
> 
> I understand you want output as early as possible, but there is always
> going to be a time when you need to hack up some static serial output
> code.
I use it for gpio drivers that are init during map_io

so not yet for earlyprintk

Best Regards,
J.