[PATCH v2 05/12] usb: chipidea: add imx driver binding

[Alexander Shishkin]

Richard Zhao <linuxzsc at gmail.com> writes:

> On Tue, May 22, 2012 at 01:41:30PM +0300, Alexander Shishkin wrote:
>> Felipe Balbi <balbi at ti.com> writes:
>> 
>> > On Tue, May 22, 2012 at 06:31:40PM +0800, Richard Zhao wrote:
>> >> On Tue, May 22, 2012 at 01:06:26PM +0300, Felipe Balbi wrote:
>> >> > Hi,
>> >> > 
>> >> > On Tue, May 22, 2012 at 12:56:52PM +0300, Alexander Shishkin wrote:
>> >> > > > Do you think it's a good idea to let user select binding driver directly
>> >> > > > and the binding driver config depends on chipidea config?
>> >> > > 
>> >> > > I don't have a strong opinion on this, although I prefer it the way it
>> >> > > is now, because, imo:
>> >> > > 
>> >> > >   * in case of =m (and that's the only sane way of compiling it anyway),
>> >> > >     these all are compiled as modules, which you simply don't install if
>> >> > >     you don't want them;
>> >> > >   * all of them get compile-tested every time you change something in
>> >> > >     the driver, which is a good thing;
>> >> > 
>> >> > only true for $(ARCH) builds. I would like to see these drivers being
>> >> > compile tested on linux-next on all arches. Thus the patches I just
>> >> > sent.
>> >> The idea is great. But
>> >> - how can I make sure it pass for all arch? There' 27 folder in arch/.
>> >> - it's hard to predict one driver depends on what.
>> >> - for embedded kernel, people like built-in drivers, and people will
>> >>   have things they don't need at all.
>> >
>> > that's true to some extent, but until we know for sure that all of that
>> > is compiling fine and all dependencies are properly handled, I wouldn't
>> > like to see Kconfig or Makefile being abused. That has happened before
>> > and will happen again if we allow it.
>> >
>> > My suggestion to Alex is to remove all dependencies for at least a
>> > couple of merge windows and only add dependencies for stuff which
>> > actually matters; like only building the PCI glue layer when CONFIG_PCI
>> > is defined instead of when ARCH_X86 is defined and so on.
>> 
>> That's what I mean to do as well. I wouldn't dream of making something
>> like this x86 specific. :)
> Alex, Have you made the decision that remove all dependencies and leave
> only ones that has to be there? If yes, I'll try the way, though I don't
> feel good about that.

Yes, I like Felipe's suggestion. Currently (with Felipe's patches from
yesterday), there is only one dependency (PCI for ci13xxx_pci, which is
ok). So let's try to keep it that way.

I'll push the patches to my tree on github [1] soon, which I propose to
use for all chipidea-related patches.

[1] git://github.com/virtuoso/linux-ci.git

Regards,
--
Alex