[PATCH v9 6/7] arm64: add support for ACPI Low Power Idle(LPI)
From: Sudeep Holla <hidden>
Date: 2016-07-08 17:10:10
Also in:
linux-acpi, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
This patch adds appropriate callbacks to support ACPI Low Power Idle (LPI) on ARM64. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <redacted> Cc: Mark Rutland <mark.rutland@arm.com> Cc: "Rafael J. Wysocki" <redacted> Acked-by: Lorenzo Pieralisi <redacted> Signed-off-by: Sudeep Holla <redacted> --- arch/arm64/kernel/cpuidle.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
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
--
2.7.4