cpufreq: Add SFI based cpufreq driver support
This adds the SFI based cpu freq driver for some of the Intel's
Silvermont based Atom architectures like Z34xx and Z35xx.
Signed-off-by: Rudramuni, Vishwesh M <vishwesh.m.rudramuni@intel.com>
Signed-off-by: Srinidhi Kasagar <srinidhi.kasagar@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/cpufreq/Kconfig.x86 b/drivers/cpufreq/Kconfig.x86
index 89ae88f..c59bdcb 100644
--- a/drivers/cpufreq/Kconfig.x86
+++ b/drivers/cpufreq/Kconfig.x86
@@ -57,6 +57,16 @@
By enabling this option the acpi_cpufreq driver provides the old
entry in addition to the new boost ones, for compatibility reasons.
+config X86_SFI_CPUFREQ
+ tristate "SFI Performance-States driver"
+ depends on X86_INTEL_MID && SFI
+ help
+ This adds a CPUFreq driver for some Silvermont based Intel Atom
+ architectures like Z34xx and Z35xx which enumerate processor
+ performance states through SFI.
+
+ If in doubt, say N.
+
config ELAN_CPUFREQ
tristate "AMD Elan SC400 and SC410"
depends on MELAN
