RE: [PATCH v3 2/5] ARM: pm: add generic CPU suspend/resume support

RE: [PATCH v3 2/5] ARM: pm: add generic CPU suspend/resume support

[Santosh Shilimkar]

+ linux-omap on this thread.

> -----Original Message-----
> From: Santosh Shilimkar [mailto:santosh.shilimkar@ti.com]
> Sent: Saturday, February 12, 2011 8:40 PM
> To: Russell King - ARM Linux
> Cc: Colin Cross; Kukjin Kim; saeed bishara; linux-arm-
> kernel@lists.infradead.org
> Subject: RE: [PATCH v3 2/5] ARM: pm: add generic CPU suspend/resume
> support
>
> > -----Original Message-----
> > From: Russell King - ARM Linux [mailto:linux@arm.linux.org.uk]
> > Sent: Saturday, February 12, 2011 8:20 PM
> > To: Santosh Shilimkar
> > Cc: Colin Cross; Kukjin Kim; saeed bishara; linux-arm-
> > kernel@lists.infradead.org
> > Subject: Re: [PATCH v3 2/5] ARM: pm: add generic CPU
> suspend/resume
> > support
> >
> > On Fri, Feb 11, 2011 at 05:37:04PM +0530, Santosh Shilimkar wrote:
> > > There is a Monitor secure API, needs to be called from non-
> secure
> > > software to set this diagnostic registers in resume path.
> >
> > It would be an idea to get the OMAP sleep code up to date so that
> I
> > can
> > look at OMAPs requirements for this to be useful.
> >
> > As the current code stands, I don't see any reason why the
> sleep34xx
> > code
> > can't use this infrastructure, but I'm loathed to start modifying
> > that if there's outstanding code changes in that area.
>
> Yep. There are few issues out there with sleep34xx code.
> 	- Secure APIs
> 	- Current code needs to be cleaned up to remove
> 	unwanted registers save restore
> 	- Some part of the code on OMAP3 must be run from
> 	SRAM. It can't run from DDR
> 	- AUXCTLR, Diagnostic registers aren't accessible
> 	in secure mode.
> 	- L2 cache needs to be handled with secure APIs.
> 	- Code sequence needs to handle errata's handling
> 	which accesses OMAP PM registers.
>
> Few of the above are getting addressed for this merge window.
>
> So my plan was to take a look at generic suspend after the
> merge window. By that time your generic stuff and omap
> cleanup would have got merged hopefully.
>
> Regards,
> Santosh