On Wed, May 11, 2016 at 5:37 PM, Sudeep Holla <[email protected]> wrote: > ACPI 6.0 adds a new method to specify the CPU idle states(C-states) > called Low Power Idle(LPI) states. Since new architectures like ARM64 > use only LPIs, introduce ACPI_PROCESSOR_CSTATE to encapsulate all the > code supporting the old style C-states(_CST). > > This patch will help to extend the processor_idle module to support > LPI. > > Cc: [email protected] > Cc: [email protected] > Cc: "Rafael J. Wysocki" <[email protected]> > Signed-off-by: Sudeep Holla <[email protected]> > --- > arch/ia64/Kconfig | 1 + > arch/x86/Kconfig | 1 + > drivers/acpi/Kconfig | 4 +++ > drivers/acpi/processor_idle.c | 80 > ++++++++++++++++++++++++++++--------------- > include/acpi/processor.h | 2 +- > 5 files changed, 60 insertions(+), 28 deletions(-) > > diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig > index b534ebab36ea..e820670d7243 100644 > --- a/arch/ia64/Kconfig > +++ b/arch/ia64/Kconfig > @@ -15,6 +15,7 @@ config IA64 > select ARCH_MIGHT_HAVE_PC_SERIO > select PCI if (!IA64_HP_SIM) > select ACPI if (!IA64_HP_SIM) > + select ACPI_PROCESSOR_CSTATE if ACPI
You don't need this -> > select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI > select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI > select HAVE_UNSTABLE_SCHED_CLOCK > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index 2dc18605831f..cb3e14757c9c 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -18,6 +18,7 @@ config X86_64 > config X86 > def_bool y > select ACPI_LEGACY_TABLES_LOOKUP if ACPI > + select ACPI_PROCESSOR_CSTATE if ACPI > select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI > select ANON_INODES > select ARCH_CLOCKSOURCE_DATA > diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig > index b7e2e776397d..093bfcc4f9c3 100644 > --- a/drivers/acpi/Kconfig > +++ b/drivers/acpi/Kconfig > @@ -213,6 +213,10 @@ config ACPI_CPU_FREQ_PSS > bool > select THERMAL > > +config ACPI_PROCESSOR_CSTATE > + bool -> if you do "def_bool y" here. > + depends on IA64 || X86 > + > config ACPI_PROCESSOR_IDLE > bool > select CPU_IDLE
