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>
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@ -37,6 +37,9 @@ Typical usage of the OPP library is as follows:
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SoC framework -> modifies on required cases certain OPPs -> OPP layer
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SoC framework -> modifies on required cases certain OPPs -> OPP layer
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-> queries to search/retrieve information ->
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-> queries to search/retrieve information ->
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Architectures that provide a SoC framework for OPP should select ARCH_HAS_OPP
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to make the OPP layer available.
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OPP layer expects each domain to be represented by a unique device pointer. SoC
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OPP layer expects each domain to be represented by a unique device pointer. SoC
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framework registers a set of initial OPPs per device with the OPP layer. This
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framework registers a set of initial OPPs per device with the OPP layer. This
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list is expected to be an optimally small number typically around 5 per device.
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list is expected to be an optimally small number typically around 5 per device.
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@ -246,9 +246,13 @@ config PM_OPS
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depends on PM_SLEEP || PM_RUNTIME
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depends on PM_SLEEP || PM_RUNTIME
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default y
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default y
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config ARCH_HAS_OPP
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bool
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config PM_OPP
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config PM_OPP
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bool "Operating Performance Point (OPP) Layer library"
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bool "Operating Performance Point (OPP) Layer library"
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depends on PM
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depends on PM
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depends on ARCH_HAS_OPP
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---help---
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---help---
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SOCs have a standard set of tuples consisting of frequency and
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SOCs have a standard set of tuples consisting of frequency and
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voltage pairs that the device will support per voltage domain. This
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voltage pairs that the device will support per voltage domain. This
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