Commit 6e0a0ea1 authored by Graeme Gregory's avatar Graeme Gregory Committed by Will Deacon
Browse files

ACPI / sleep: Introduce CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT 



ACPI 5.1 does not currently support S states for ARM64 hardware but
ACPI code will call acpi_target_system_state() and acpi_sleep_init()
for device power management, so introduce
CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT and select it for x86 and
ia64 only to make sleep functions available, and also introduce stub
function to allow other drivers to function until S states are defined
for ARM64.

It will be no functional change for x86 and IA64.

Suggested-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: default avatarGraeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: default avatarTomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: default avatarHanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 652261a7

arch/ia64/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ config IA64 
	select ARCH_MIGHT_HAVE_PC_SERIO

	select PCI if (!IA64_HP_SIM)

	select ACPI if (!IA64_HP_SIM)

	select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI

	select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI

	select HAVE_UNSTABLE_SCHED_CLOCK

	select HAVE_IDE

arch/x86/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ config X86_64 
### Arch settings

config X86

	def_bool y

	select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI

	select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI

	select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS

	select ARCH_HAS_FAST_MULTIPLIER

drivers/acpi/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -48,9 +48,13 @@ config ACPI_LEGACY_TABLES_LOOKUP 
config ARCH_MIGHT_HAVE_ACPI_PDC

	bool



config ACPI_SYSTEM_POWER_STATES_SUPPORT

	bool



config ACPI_SLEEP

	bool

	depends on SUSPEND || HIBERNATION

	depends on ACPI_SYSTEM_POWER_STATES_SUPPORT

	default y



config ACPI_PROCFS_POWER

drivers/acpi/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -23,7 +23,7 @@ acpi-y += nvs.o 


# Power management related files

acpi-y				+= wakeup.o

acpi-y				+= sleep.o

acpi-$(CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT) += sleep.o

acpi-y				+= device_pm.o

acpi-$(CONFIG_ACPI_SLEEP)	+= proc.o

drivers/acpi/internal.h

+4 −0
Original line number Diff line number Diff line
@@ -161,7 +161,11 @@ void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit); 
/*--------------------------------------------------------------------------

                                  Suspend/Resume

  -------------------------------------------------------------------------- */

#ifdef CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT

extern int acpi_sleep_init(void);

#else

static inline int acpi_sleep_init(void) { return -ENXIO; }

#endif



#ifdef CONFIG_ACPI_SLEEP

int acpi_sleep_proc_init(void);

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