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authorSudeep Holla <Sudeep.Holla@arm.com>2016-07-19 18:52:58 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-07-21 23:29:38 +0200
commit5a611ed969b04269512ba4c07466bd5f4eaab8a7 (patch)
treeab03b59d7ef952276863848b9a6b761c90b487f7 /arch/arm64
parentc2a25c141f4e80debd8eec3e9a5f9d25daedb54f (diff)
arm64: add support for ACPI Low Power Idle(LPI)
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>
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/kernel/cpuidle.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm64/kernel/cpuidle.c b/arch/arm64/kernel/cpuidle.c
index 06786fdaadeb..75a0f8acef66 100644
--- a/arch/arm64/kernel/cpuidle.c
+++ b/arch/arm64/kernel/cpuidle.c
@@ -9,6 +9,9 @@
* 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_device.h>
@@ -39,3 +42,18 @@ int arm_cpuidle_suspend(int 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