Hi Sudeep, On 16 September 2015 at 09:59, Sudeep Holla <sudeep.holla@xxxxxxx> 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 ARCH_SUPPORTS_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: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx> > Signed-off-by: Sudeep Holla <sudeep.holla@xxxxxxx> > --- > arch/ia64/Kconfig | 1 + > arch/x86/Kconfig | 1 + > drivers/acpi/Kconfig | 3 +++ > drivers/acpi/processor_idle.c | 57 +++++++++++++++++++++++++++++++------------ > include/acpi/processor.h | 3 ++- > 5 files changed, 49 insertions(+), 16 deletions(-) > > diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig > index eb0249e37981..dbfa3c3a49e1 100644 > --- a/arch/ia64/Kconfig > +++ b/arch/ia64/Kconfig > @@ -16,6 +16,7 @@ config IA64 > select PCI if (!IA64_HP_SIM) > select ACPI if (!IA64_HP_SIM) > select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI > + select ARCH_SUPPORTS_ACPI_PROCESSOR_CSTATE if ACPI > select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI > select HAVE_UNSTABLE_SCHED_CLOCK > select HAVE_IDE > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index 7aef2d52daa0..173075c48df8 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -34,6 +34,7 @@ config X86 > select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI > select ARCH_MIGHT_HAVE_PC_PARPORT > select ARCH_MIGHT_HAVE_PC_SERIO > + select ARCH_SUPPORTS_ACPI_PROCESSOR_CSTATE if ACPI > select ARCH_SUPPORTS_ATOMIC_RMW > select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT > select ARCH_SUPPORTS_INT128 if X86_64 > diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig > index 5d1015c26ff4..1eb0b8a84a65 100644 > --- a/drivers/acpi/Kconfig > +++ b/drivers/acpi/Kconfig > @@ -48,6 +48,9 @@ config ACPI_LEGACY_TABLES_LOOKUP > config ARCH_MIGHT_HAVE_ACPI_PDC > bool > > +config ARCH_SUPPORTS_ACPI_PROCESSOR_CSTATE > + bool > + > config ACPI_GENERIC_GSI > bool > Can't this be auto selected under ACPI_PROCESSOR_IDLE if X86 || IA64 instead? Regards, Ashwin. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
