On Friday 16 September 2011 11:15 PM, Kevin Hilman wrote: > Hi Santosh, > > Santosh Shilimkar <santosh.shilimkar@xxxxxx> writes: > >> Add OMAP4 CPUIDLE support. CPU1 is left with defualt idle and >> the low power state for it is managed via cpu-hotplug. >> >> This patch adds MPUSS low power states in cpuidle. >> >> C1 - CPU0 ON + CPU1 ON + MPU ON >> C2 - CPU0 OFF + CPU1 OFF + MPU CSWR >> C3 - CPU0 OFF + CPU1 OFF + MPU OSWR >> >> OMAP4460 onwards, MPUSS power domain doesn't support OFF state any more >> anymore just like CORE power domain. The deepest state supported is OSWr. >> Ofcourse when MPUSS and CORE PD transitions to OSWR along with device >> off mode, even the memory contemts are lost which is as good as >> the PD off state. >> >> On OMAP4 because of hardware constraints, no low power states are >> targeted when both CPUs are online and in SMP mode. The low power >> states are attempted only when secondary CPU gets offline to OFF >> through hotplug infrastructure. >> >> Thanks to Nicole Chalhoub <n-chalhoub@xxxxxx> for doing exhaustive >> C-state latency profiling. >> >> Signed-off-by: Rajendra Nayak <rnayak@xxxxxx> >> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx> >> Cc: Kevin Hilman <khilman@xxxxxx> > > A handful of minor comments below... > Will take care of them. Regards Santosh -- 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
