Re: [PATCH v2] twl4030 reboot workaround

[Mikko Rapeli <ext-mikko.rapeli@nokia.com>]

On Thu, Jul 29, 2010 at 09:10:43PM +0200, ext Mike Rapoport wrote:
> On Thu, Jul 29, 2010 at 9:41 AM, Mikko Rapeli
> <ext-mikko.rapeli@nokia.com> wrote:
> > From: Mikko Rapeli <ext-mikko.rapeli@nokia.com>
> >
> > Original patch: http://marc.info/?l=linux-omap&m=126522625032441&w=2
> >
> > "Removes TWL4030 sleep script prior to rebooting, only on OMAP3. This is
> > necessary since DPLL3 reset causes SYS_OFFMODE pin to go low, resulting
> > in the sleep script being executed on TWL4030. This usually results in
> > VDD1 & VDD2 voltage collapse while ROM code is executing, followed by an
> > MPU Watch Dog reset or worse, an irrecoverable hang."
> 
> I had a similar issue when my system hanged on hard reset when there
> was a TWL sleep script installed.
> The workaround I've found was to install the sleep script immediately
> before entering the suspend state and remove the script on the resume
> path.
> If you think that such approach is appropriate I can send a patch.

Yes, I think this patch would be a good idea too since it fixes a real
issue.

-Mikko