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| author | Dave Gerlach <d-gerlach@ti.com> | 2017-02-03 11:29:28 -0600 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-02-09 22:57:48 +0100 |
| commit | e13cf046cd70894393a1085ca39da7ef751353fb (patch) | |
| tree | 9622a5f07c28893490afe34da58287f90d88f94f /drivers/cpufreq/Kconfig.arm | |
| parent | 953a0f18337406ab041252ce5a62db5d173bee5f (diff) | |
| download | blackbird-obmc-linux-e13cf046cd70894393a1085ca39da7ef751353fb.tar.gz blackbird-obmc-linux-e13cf046cd70894393a1085ca39da7ef751353fb.zip | |
cpufreq: ti: Add cpufreq driver to determine available OPPs at runtime
Some TI SoCs, like those in the AM335x, AM437x, DRA7x, and AM57x families,
have different OPPs available for the MPU depending on which specific
variant of the SoC is in use. This can be determined through use of the
revision and an eFuse register present in the silicon. Introduce a
ti-cpufreq driver that can read the aformentioned values and provide
them as version matching data to the opp framework. Through this the
opp-supported-hw dt binding that is part of the operating-points-v2
table can be used to indicate availability of OPPs for each device.
This driver also creates the "cpufreq-dt" platform_device after passing
the version matching data to the OPP framework so that the cpufreq-dt
handles the actual cpufreq implementation. Even without the necessary
data to pass the version matching data the driver will still create this
device to maintain backwards compatibility with operating-points v1
tables.
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/Kconfig.arm')
| -rw-r--r-- | drivers/cpufreq/Kconfig.arm | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm index 920c469f3953..6d87742fc5aa 100644 --- a/drivers/cpufreq/Kconfig.arm +++ b/drivers/cpufreq/Kconfig.arm @@ -247,6 +247,17 @@ config ARM_TEGRA124_CPUFREQ help This adds the CPUFreq driver support for Tegra124 SOCs. +config ARM_TI_CPUFREQ + bool "Texas Instruments CPUFreq support" + depends on ARCH_OMAP2PLUS + help + This driver enables valid OPPs on the running platform based on + values contained within the SoC in use. Enable this in order to + use the cpufreq-dt driver on all Texas Instruments platforms that + provide dt based operating-points-v2 tables with opp-supported-hw + data provided. Required for cpufreq support on AM335x, AM437x, + DRA7x, and AM57x platforms. + config ARM_PXA2xx_CPUFREQ tristate "Intel PXA2xx CPUfreq driver" depends on PXA27x || PXA25x |
