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ACPI: Decouple ACPI idle and ACPI processor drivers

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This patch introduces a new Kconfig symbol, ACPI_PROCESSOR_IDLE,
which is auto selected by architectures which support the ACPI
based C states for CPU Idle management.

The processor_idle driver in its present form contains declarations
specific to X86 and IA64. Since there are no reasonable defaults
for other architectures e.g. ARM64, the driver is selected only for
X86 or IA64.

This helps in decoupling the ACPI processor_driver from the ACPI
processor_idle driver which is useful for the upcoming alternative
patchwork for controlling CPU Performance (CPPC) and CPU Idle (LPI).

Signed-off-by: Ashwin Chaugule <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Ashwin Chaugule 2015-08-05 09:40:26 -04:00 • committed by Rafael J. Wysocki
commit 5f05586c60
3 changed files with 31 additions and 4 deletions
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6
drivers/acpi/Kconfig
View file

@ -193,10 +193,14 @@ config ACPI_CPU_FREQ_PSS
bool
select THERMAL
config ACPI_PROCESSOR_IDLE
bool
select CPU_IDLE
config ACPI_PROCESSOR
tristate "Processor"
depends on X86 || IA64
select CPU_IDLE
select ACPI_PROCESSOR_IDLE
select ACPI_CPU_FREQ_PSS
default y
help

3
drivers/acpi/Makefile
View file

@ -80,7 +80,8 @@ obj-$(CONFIG_ACPI_CUSTOM_METHOD)+= custom_method.o
obj-$(CONFIG_ACPI_BGRT) += bgrt.o
# processor has its own "processor." module_param namespace
processor-y := processor_driver.o processor_idle.o
processor-y := processor_driver.o
processor-$(CONFIG_ACPI_PROCESSOR_IDLE) += processor_idle.o
processor-$(CONFIG_ACPI_CPU_FREQ_PSS) += processor_throttling.o \
processor_thermal.o
processor-$(CONFIG_CPU_FREQ) += processor_perflib.o