2 * ARM64 CPU idle arch support
4 * Copyright (C) 2014 ARM Ltd.
5 * Author: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
13 #include <linux/of_device.h>
15 #include <asm/cpuidle.h>
16 #include <asm/cpu_ops.h>
18 int __init arm_cpuidle_init(unsigned int cpu)
20 int ret = -EOPNOTSUPP;
22 if (cpu_ops[cpu] && cpu_ops[cpu]->cpu_suspend &&
23 cpu_ops[cpu]->cpu_init_idle)
24 ret = cpu_ops[cpu]->cpu_init_idle(cpu);
30 * cpu_suspend() - function to enter a low-power idle state
31 * @arg: argument to pass to CPU suspend operations
33 * Return: 0 on success, -EOPNOTSUPP if CPU suspend hook not initialized, CPU
34 * operations back-end error code otherwise.
36 int arm_cpuidle_suspend(int index)
38 int cpu = smp_processor_id();
40 return cpu_ops[cpu]->cpu_suspend(index);