diff options
| author | Sudeep Holla <Sudeep.Holla@arm.com> | 2016-07-19 19:52:58 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-07-21 23:29:38 +0200 |
| commit | 5a611ed969b04269512ba4c07466bd5f4eaab8a7 (patch) | |
| tree | ab03b59d7ef952276863848b9a6b761c90b487f7 /arch/arm64/kernel/cpuidle.c | |
| parent | drivers: firmware: psci: initialise idle states using ACPI LPI (diff) | |
| download | linux-5a611ed969b04269512ba4c07466bd5f4eaab8a7.tar.xz linux-5a611ed969b04269512ba4c07466bd5f4eaab8a7.zip | |
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/kernel/cpuidle.c')
| -rw-r--r-- | arch/arm64/kernel/cpuidle.c | 18 |
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 |