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Date: Tue, 9 Nov 2010 18:24:16 +0000 From: Mark Brown <broonie@...nsource.wolfsonmicro.com> To: Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>, "Rafael J. Wysocki" <rjw@...k.pl>, Nishanth Menon <nm@...com> Cc: linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org, patches@...nsource.wolfsonmicro.com, Mark Brown <broonie@...nsource.wolfsonmicro.com> Subject: [PATCH] PM: 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@...nsource.wolfsonmicro.com> --- 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 -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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