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[ACPI] enable C2 and C3 idle power states on SMP

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http://bugzilla.kernel.org/show_bug.cgi?id=4401

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Venkatesh Pallipadi
2005-04-15 15:07:10 -04:00
committed by Len Brown
parent 17e9c78a75
commit 02df8b9385
10 changed files with 284 additions and 81 deletions
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33
drivers/acpi/processor_perflib.c
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@ -165,37 +165,6 @@ void acpi_processor_ppc_exit(void) {
acpi_processor_ppc_status &= ~PPC_REGISTERED;
}
/*
* when registering a cpufreq driver with this ACPI processor driver, the
* _PCT and _PSS structures are read out and written into struct
* acpi_processor_performance.
*/
static int acpi_processor_set_pdc (struct acpi_processor *pr)
{
acpi_status status = AE_OK;
u32 arg0_buf[3];
union acpi_object arg0 = {ACPI_TYPE_BUFFER};
struct acpi_object_list no_object = {1, &arg0};
struct acpi_object_list *pdc;
ACPI_FUNCTION_TRACE("acpi_processor_set_pdc");
arg0.buffer.length = 12;
arg0.buffer.pointer = (u8 *) arg0_buf;
arg0_buf[0] = ACPI_PDC_REVISION_ID;
arg0_buf[1] = 0;
arg0_buf[2] = 0;
pdc = (pr->performance->pdc) ? pr->performance->pdc : &no_object;
status = acpi_evaluate_object(pr->handle, "_PDC", pdc, NULL);
if ((ACPI_FAILURE(status)) && (pr->performance->pdc))
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Error evaluating _PDC, using legacy perf. control...\n"));
return_VALUE(status);
}
static int
acpi_processor_get_performance_control (
@ -357,7 +326,7 @@ acpi_processor_get_performance_info (
if (!pr || !pr->performance || !pr->handle)
return_VALUE(-EINVAL);
acpi_processor_set_pdc(pr);
acpi_processor_set_pdc(pr, pr->performance->pdc);
status = acpi_get_handle(pr->handle, "_PCT", &handle);
if (ACPI_FAILURE(status)) {