diff options
Diffstat (limited to 'arch/arm64/kernel/cpuidle.c')
| -rw-r--r-- | arch/arm64/kernel/cpuidle.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/arch/arm64/kernel/cpuidle.c b/arch/arm64/kernel/cpuidle.c index 9047cab68fd3..75a0f8acef66 100644 --- a/arch/arm64/kernel/cpuidle.c +++ b/arch/arm64/kernel/cpuidle.c @@ -9,17 +9,21 @@ * 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> #include <asm/cpuidle.h> #include <asm/cpu_ops.h> -int __init arm_cpuidle_init(unsigned int cpu) +int arm_cpuidle_init(unsigned int cpu) { int ret = -EOPNOTSUPP; - if (cpu_ops[cpu] && cpu_ops[cpu]->cpu_init_idle) + if (cpu_ops[cpu] && cpu_ops[cpu]->cpu_suspend && + cpu_ops[cpu]->cpu_init_idle) ret = cpu_ops[cpu]->cpu_init_idle(cpu); return ret; @@ -36,11 +40,20 @@ int arm_cpuidle_suspend(int index) { int cpu = smp_processor_id(); - /* - * If cpu_ops have not been registered or suspend - * has not been initialized, cpu_suspend call fails early. - */ - if (!cpu_ops[cpu] || !cpu_ops[cpu]->cpu_suspend) - return -EOPNOTSUPP; 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 |
