From: Graeme Gregory <graeme.gregory@xxxxxxxxxx>
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: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Graeme Gregory <graeme.gregory@xxxxxxxxxx>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@xxxxxxxxxx>
Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
---
arch/ia64/Kconfig | 1 +
arch/x86/Kconfig | 1 +
drivers/acpi/Kconfig | 4 ++++
drivers/acpi/Makefile | 2 +-
drivers/acpi/internal.h | 4 ++++
5 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 074e52b..cc3414f 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -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
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index b7d31ca..c3ea9f9 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -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
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index e6c3ddd..a726381 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -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
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 623b117..db153c6 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -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
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 56b321a..ba4a61e 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -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);
--
1.9.1
--
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