ACPI / CPPC: Add a CPUFreq driver for use with CPPC

[firefly-linux-kernel-4.4.55.git] / drivers / cpufreq / Kconfig.arm

diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index cd0391e46c6dbc6163819b533ce225f3afe898e8..642fd49793b0a9284a83eddb3275ff627ca46763 100644 (file)
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -227,3 +227,20 @@ config ARM_PXA2xx_CPUFREQ
          This add the CPUFreq driver support for Intel PXA2xx SOCs.
 
          If in doubt, say N.
          This add the CPUFreq driver support for Intel PXA2xx SOCs.
 
          If in doubt, say N.

+
+config ACPI_CPPC_CPUFREQ
+       tristate "CPUFreq driver based on the ACPI CPPC spec"
+       depends on ACPI
+       select ACPI_CPPC_LIB
+       default n
+       help
+         This adds a CPUFreq driver which uses CPPC methods
+         as described in the ACPIv5.1 spec. CPPC stands for
+         Collaborative Processor Performance Controls. It
+         is based on an abstract continuous scale of CPU
+         performance values which allows the remote power
+         processor to flexibly optimize for power and
+         performance. CPPC relies on power management firmware
+         support for its operation.
+
+         If in doubt, say N.