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ACPI: Notify the _PPC evaluation status to the platform

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According to the ACPI spec(section 8.4.4.3) OSPM should convey the _PPC
evaluations status to the platform if there exists the _OST object.
The _OST contains two arguments:
	The first is the PERFORMANCE notificatin event.
	The second is the status of _PPC object.
OSPM will convey the _PPC evaluation status to the platform.
Of course when the module parameter of "ignore_ppc" is added, OSPM won't
evaluate the _PPC object. But it will call the _OST object.

At the same time the _OST object will be evaluated only when the PERFORMANCE
notification event is received.

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Zhao Yakui 2009-10-16 09:20:41 +08:00 • committed by Len Brown
parent b419148e56
commit d81c45e1c9
3 changed files with 53 additions and 8 deletions
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5
include/acpi/processor.h
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@ -294,7 +294,7 @@ static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
#ifdef CONFIG_CPU_FREQ
void acpi_processor_ppc_init(void);
void acpi_processor_ppc_exit(void);
int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
#else
static inline void acpi_processor_ppc_init(void)
{
@ -304,7 +304,8 @@ static inline void acpi_processor_ppc_exit(void)
{
return;
}
static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
int event_flag)
{
static unsigned int printout = 1;
if (printout) {