Mark Brown had written, on 11/09/2010 12:24 PM, the following: > Since the OPP API is only useful with an appropraite SoC-specific > implementation there is no point in offering the ability to enable > the API on general systems. Provide an ARCH_HAS OPP Kconfig symbol > which masks out the option unless selected by an implementation. Thanks. yep, this is a good change to have. > > Signed-off-by: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx> Acked-by: Nishanth Menon <nm@xxxxxx> > --- > Documentation/power/opp.txt | 3 +++ > kernel/power/Kconfig | 4 ++++ > 2 files changed, 7 insertions(+), 0 deletions(-) > > diff --git a/Documentation/power/opp.txt b/Documentation/power/opp.txt > index 44d87ad..cd44558 100644 > --- a/Documentation/power/opp.txt > +++ b/Documentation/power/opp.txt > @@ -37,6 +37,9 @@ Typical usage of the OPP library is as follows: > SoC framework -> modifies on required cases certain OPPs -> OPP layer > -> queries to search/retrieve information -> > > +Architectures that provide a SoC framework for OPP should select ARCH_HAS_OPP > +to make the OPP layer available. > + > OPP layer expects each domain to be represented by a unique device pointer. SoC > framework registers a set of initial OPPs per device with the OPP layer. This > list is expected to be an optimally small number typically around 5 per device. > diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig > index 29bff61..a5aff3e 100644 > --- a/kernel/power/Kconfig > +++ b/kernel/power/Kconfig > @@ -246,9 +246,13 @@ config PM_OPS > depends on PM_SLEEP || PM_RUNTIME > default y > > +config ARCH_HAS_OPP > + bool > + > config PM_OPP > bool "Operating Performance Point (OPP) Layer library" > depends on PM > + depends on ARCH_HAS_OPP > ---help--- > SOCs have a standard set of tuples consisting of frequency and > voltage pairs that the device will support per voltage domain. This -- Regards, Nishanth Menon _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
