[PATCH 21/21] ARM: Kirkwood: Remove DT support

[Jason Cooper]

On Fri, Feb 21, 2014 at 05:36:47PM +0100, Arnd Bergmann wrote:
> On Friday 21 February 2014 16:52:52 Thomas Petazzoni wrote:
> > On Thu, 20 Feb 2014 18:24:38 -0500, Jason Cooper wrote:
> > 
> > > > We keep any system using -setup.c files, and remove the ability to
> > > > boot systems with a DT description. Thus mach-kirkwood becomes legacy,
> > > > and you should now be trying to only use mach-mvebu, compiled for v5
> > > > systems and a second compile for v7 systems.
> > > > 
> > > > There are four systems left in mach-kirkwood which don't have DT
> > > > equivalent. These are LaCie 2Big and 5Big, HP t5325 thin client and
> > > > Marvell OpenRD machines. I'm working on t5325 and Openrd. The sticking
> > > > point is audio support, which no other board has done with DT yet.
> > > > The two LeCie boards have a custom LED driver which needs a DT
> > > > binding. My gut feeling is that we won't get these four converted to
> > > > DT in time for 3.15.
> > > 
> > > Why not do like we did when we started the kirkwood dt conversion?
> > > Create dts files for the remaining boards, and do
> > > 
> > > if (of_machine_is_compatible(...))
> > >       legacy_audio_init()
> > > 
> > > in board-v5.c?
> > > 
> > > I suspect audio is going to take time to sort out.  I'd hate to delay
> > > this just for that.
> > 
> > Yes, I believe it's a good plan. Convert as much as possible to DT, and
> > only keep those few devices (audio and leds) probe in an old-style
> > fashion.
> > 
> > This way, we can progressively add the necessary missing DT bindings.
> 
> Makes sense.
> 
> I'm also adding Simon Guinot to Cc here. He contributed both the kernel
> support and the Debian support for the LaCie 2Big/5Big. He might also be
> able to verify that they work after the DT conversion, or even help
> implementing it. Since there is already someone who is looking into
> t5325, that would just leave the OpenRD reference design, right?

Yes.  Although we are running short on time.  I'd prefer not to rush
Dashie, as he's brand new to the community.  Also, Andrew has a Makefile
solution he's working on to keep life manageable for debian for v3.15.
We can take it out after the boards are converted with the above
solution.  It might even be fixes-non-critical for v3.16.

thx,

Jason.