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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-11-11 01:51:26 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2010-11-11 01:51:26 +0100 |
| commit | 43e60861fe9d39740cf5b355f58fecedf0d8e9ba (patch) | |
| tree | 7751208ba2b579d22e70bd5043c6b4c63847feb5 | |
| parent | PM: Allow devices to be removed during late suspend and early resume (diff) | |
| download | linux-43e60861fe9d39740cf5b355f58fecedf0d8e9ba.tar.xz linux-43e60861fe9d39740cf5b355f58fecedf0d8e9ba.zip | |
PM / OPP: Hide OPP configuration when SoCs do not provide an implementation
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.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Nishanth Menon <nm@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| -rw-r--r-- | Documentation/power/opp.txt | 3 | ||||
| -rw-r--r-- | kernel/power/Kconfig | 4 |
2 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/power/opp.txt b/Documentation/power/opp.txt index 44d87ad3cea9..cd445582d1f8 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 29bff6117abc..a5aff3ebad38 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 |