Hi Paul, On 08/01/2012 10:36 AM, Paul Walmsley wrote: > Hi Jon et al, > > Here's what I'm planning to queue here. The only changes from what Jon > posted are the patch changelog and some checkpatch fixes. If anyone > has any final comments, please let me know. > > > - Paul > > From: Paul Walmsley <paul@xxxxxxxxx> > Date: Wed, 1 Aug 2012 09:11:20 -0600 > Subject: [PATCH] ARM: OMAP2+: clockdomain/hwmod: add workaround for EMU > clockdomain idle problems > > The idle status of the IP blocks and clocks inside the EMU clockdomain > isn't taken into account by the PRCM hardware when deciding whether > the clockdomain is idle. Add a workaround flag in the clockdomain > code, CLKDM_MISSING_IDLE_REPORTING, to deal with this problem, and add > the code necessary to support it. > > If CLKDM_MISSING_IDLE_REPORTING is set on a clockdomain, the > clockdomain will be forced active whenever an IP block inside that > clockdomain is in use, even if the clockdomain supports > hardware-supervised idle. When the kernel indicates that the last > active IP block inside the clockdomain is no longer used, the > clockdomain will be forced idle, or, if that mode is not supported in > the hardware, it will be placed into hardware-supervised idle. > > This patch is an equal collaboration with Jon Hunter > <jon-hunter@xxxxxx>. Ming Lei <ming.lei@xxxxxxxxxxxxx>, Will Deacon > <will.deacon@xxxxxxx>, Madhav Vij <mvij@xxxxxx>, Kevin Hilman > <khilman@xxxxxx>, Benoît Cousson <b-cousson@xxxxxx>, and Santosh > Shilimkar <santosh.shilimkar@xxxxxx> all made essential contributions > to the understanding of EMU clockdomain power management on OMAP. > > Signed-off-by: Paul Walmsley <paul@xxxxxxxxx> Thanks for sending out. You can add my ... Tested-by: Jon Hunter <jon-hunter@xxxxxx> I have tested this on omap3430 (beagle), omap4430 (blaze) and omap4460 (panda) with perf and my PMU series [1]. I have verified that the EMU power domain is transitioning correctly on these platforms. For OMAP3430 I checked that CORE retention is still being achieved with this change. Cheers Jon [1] git@xxxxxxxxxxxxx:linux-omap-dev/linux-omap-dev.git -b dev-pmu -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
