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Groups > linux.kernel > #1446617

[PATCH v10 6/7] 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.

Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
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>
---
 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

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[PATCH v10 0/7] ACPI / processor_idle: Add ACPI v6.0 LPI support Sudeep Holla <sudeep.holla@arm.com> - 2016-07-19 20:00 +0200
  [PATCH v10 7/7] ACPI : enable ACPI_PROCESSOR_IDLE on ARM64 Sudeep Holla <sudeep.holla@arm.com> - 2016-07-19 20:00 +0200
  [PATCH v10 6/7] arm64: add support for ACPI Low Power Idle(LPI) Sudeep Holla <sudeep.holla@arm.com> - 2016-07-19 20:00 +0200
  [PATCH v10 2/7] ACPI / processor_idle: Add support for Low Power Idle(LPI) states Sudeep Holla <sudeep.holla@arm.com> - 2016-07-19 20:00 +0200
    Re: [PATCH v10 2/7] ACPI / processor_idle: Add support for Low Power Idle(LPI) states "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-07-21 15:30 +0200
      Re: [PATCH v10 2/7] ACPI / processor_idle: Add support for Low Power  Idle(LPI) states Sudeep Holla <sudeep.holla@arm.com> - 2016-07-21 18:00 +0200
    [PATCH v10 2/7] ACPI / processor_idle: Add support for Low Power Idle(LPI) states Sudeep Holla <sudeep.holla@arm.com> - 2016-07-21 18:20 +0200
  [PATCH v10 1/7] ACPI / processor_idle: introduce ACPI_PROCESSOR_CSTATE Sudeep Holla <sudeep.holla@arm.com> - 2016-07-19 20:00 +0200
  [PATCH v10 5/7] drivers: firmware: psci: initialise idle states using ACPI LPI Sudeep Holla <sudeep.holla@arm.com> - 2016-07-19 20:00 +0200

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