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authorGraeme Gregory <graeme.gregory@linaro.org>2015-03-24 17:02:39 +0300
committerWill Deacon <will.deacon@arm.com>2015-03-25 14:49:31 +0300
commit6e0a0ea12962a2175a9f47621f9fe7a4c866cb12 (patch)
tree190b59bb06354d4f438af6614ba4165131af8daf /drivers/acpi/internal.h
parent652261a7a86c884147930fa1e5ddd82a8a5748da (diff)
downloadlinux-6e0a0ea12962a2175a9f47621f9fe7a4c866cb12.tar.xz
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: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org> Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/acpi/internal.h')
-rw-r--r--drivers/acpi/internal.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 56b321aa2b1c..ba4a61e964be 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);