From: Mikko Rapeli <ext-mikko.rapeli@nokia.com>
To: ext Mike Rapoport <mike.rapoport@gmail.com>
Cc: "linux-omap@vger.kernel.org" <linux-omap@vger.kernel.org>,
"mturquette@ti.com" <mturquette@ti.com>,
"sameo@linux.intel.com" <sameo@linux.intel.com>
Subject: Re: [PATCH v2] twl4030 reboot workaround
Date: Fri, 30 Jul 2010 08:48:15 +0300 [thread overview]
Message-ID: <20100730054815.GN12063@edollo> (raw)
In-Reply-To: <AANLkTi=OkfRGvW05ZTOaSU+-r7jo40wHFK_pkQM9Hmw=@mail.gmail.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
next prev parent reply other threads:[~2010-07-30 5:48 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-03 19:43 [RFC] OMAP3: PM: disable twl4030 sleep sequence before reboot Mike Turquette
2010-02-03 19:43 ` [PATCH 1/2] MFD: TWL4030: introduce remove_script function Mike Turquette
2010-02-03 19:43 ` [PATCH 2/2] OMAP3: PM: remove TWL4030 A2S script before reboot Mike Turquette
2010-02-09 22:35 ` Tony Lindgren
2010-07-28 9:41 ` [PATCH] twl4030 reboot workaround Mikko Rapeli
2010-07-28 10:07 ` Gopinath, Thara
2010-07-29 6:07 ` Mikko Rapeli
2010-07-28 10:18 ` Peter 'p2' De Schrijver
2010-07-29 6:06 ` Mikko Rapeli
2010-07-28 15:47 ` Mike Turquette
2010-07-29 6:16 ` Mikko Rapeli
2010-07-29 6:41 ` [PATCH v2] " Mikko Rapeli
2010-07-29 19:10 ` Mike Rapoport
2010-07-30 5:48 ` Mikko Rapeli [this message]
2010-07-30 6:35 ` Gopinath, Thara
2010-07-30 18:39 ` Mike Turquette
2010-07-30 19:11 ` Gopinath, Thara
2010-08-01 6:31 ` Mike Rapoport
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