Tero Kristo <t-kristo@xxxxxx> writes: > From: Nishanth Menon <nm@xxxxxx> > > We currently have mechanisms in place to describe the PMIC per > rail, however we also need to configure the system for situations > such as OFF mode, where, oscillator switch off and on time, and > similar durations for PMIC also tends to play a major factor. > Introduce a few apis to OMAP2's pm framework to use these. OMAP1 > does'nt seem to need this at the moment, hence not a OMAP generic > framework. The set functions are meant to be used by initialization > code. > > The OMAP specific implementation would need to use this ofcourse. > > Signed-off-by: Nishanth Menon <nm@xxxxxx> > --- > arch/arm/mach-omap2/pm.c | 122 ++++++++++++++++++++++++++++++++++++++++++++++ > arch/arm/mach-omap2/pm.h | 18 +++++++ > 2 files changed, 140 insertions(+), 0 deletions(-) > > diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c > index 659e400..e130d92 100644 > --- a/arch/arm/mach-omap2/pm.c > +++ b/arch/arm/mach-omap2/pm.c > @@ -24,6 +24,52 @@ > #include "clockdomain.h" > #include "pm.h" > > +/** > + * struct omap2_pm_lp_description - Describe low power behavior of the system > + * @oscillator_startup_time: Time rounded up to uSec for the oscillator to > + * provide a stable clock from power on. > + * @oscillator_shutdown_time: Time rounded up to uSec for oscillator to safely > + * switch off. > + * @pmic_startup_time: Time rounded up to uSec for the PMIC to > + * provide be ready for operation from low power > + * state. Note: this is not the same as voltage > + * rampup time, instead, consider the PMIC to be > + * in lowest power state(say OFF), this is the time > + * required for it to become ready for it's DCDCs > + * or LDOs to start operation. > + * @pmic_shutdown_time: Time rounded up to uSec for the PMIC to > + * go to low power after the LDOs are pulled to > + * appropriate state. Note: this is not the same as > + * voltage rampdown time, instead, consider the > + * PMIC to have switched it's LDOs down, this is > + * time taken to reach it's lowest power state(say > + * sleep/OFF). IMO, These PMIC times should be part of the existing struct that describes all the configurable PMIC settings. Kevin -- 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
