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arm64: add support for ACPI Low Power Idle(LPI)

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This patch adds appropriate callbacks to support ACPI Low Power Idle
(LPI) on ARM64.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Sudeep Holla 2016-07-19 18:52:58 +01:00 committed by Rafael J. Wysocki
parent c2a25c141f
commit 5a611ed969
1 changed files with 18 additions and 0 deletions
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18
arch/arm64/kernel/cpuidle.c
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@ -9,6 +9,9 @@
* published by the Free Software Foundation. * published by the Free Software Foundation.
*/ */
#include <linux/acpi.h>
#include <linux/cpuidle.h>
#include <linux/cpu_pm.h>
#include <linux/of.h> #include <linux/of.h>
#include <linux/of_device.h> #include <linux/of_device.h>
@ -39,3 +42,18 @@ int arm_cpuidle_suspend(int index)
return cpu_ops[cpu]->cpu_suspend(index); return cpu_ops[cpu]->cpu_suspend(index);
} }
#ifdef CONFIG_ACPI
#include <acpi/processor.h>
int acpi_processor_ffh_lpi_probe(unsigned int cpu)
{
return arm_cpuidle_init(cpu);
}
int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi)
{
return CPU_PM_CPU_IDLE_ENTER(arm_cpuidle_suspend, lpi->index);
}
#endif