[PATCH 01/15] watchdog: orion: Remove unneeded BRIDGE_CAUSE clear

On Tue, Aug 27, 2013 at 11:55:33PM +0200, Thomas Petazzoni wrote:

Dear Jason Cooper,

On Tue, 27 Aug 2013 17:41:21 -0400, Jason Cooper wrote:

quoted

On Tue, Aug 27, 2013 at 03:02:48PM -0600, Jason Gunthorpe wrote:

quoted

Since this is so complex, maybe it is OK to abandon support for non-DT
boards in the WDT driver? Watchdog is not critical functionality, so
nobody should be critically impacted. Boards would have to migrate
to DT to get WDT back?

I'm not 100% opposed to this.  We need to give it careful thought, but
it may be a viable solution since we are at the "convert old boards to
DT" stage anyhow.  If we had ten more drivers and 6 release cycles in
front of us, I'd say no.

While we're close to full DT for mach-kirkwood and mach-dove, we're
pretty far from that for mach-orion5x and mach-mv78xx0, and I believe
both are using the orion_wdt driver.

I understand that they both *can* use it.  Do any distro's actually use
it in default configurations?  Do any users actually load it and kick
the dog in their main loop?

I don't have the answers to those questions, but I'd be surprised if it
was more than a few specialty users.

Another thought:  If there are users in the above scenario, could they
swap out for the kernel's software watchdog?  Assuming they can't
upgrade to DT...

</pokes self> Once pxa-impedance-matcher can edit the dtb, those users
would have a means to upgrade to a DT enabled kernel without bootloader
modifications...  I really gotta get back to that. :)

thx,

Jason.