1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_ARM_CPUIDLE_H
 3#define __ASM_ARM_CPUIDLE_H
 4
 5#include <asm/proc-fns.h>
 6
 7#ifdef CONFIG_CPU_IDLE
 8extern int arm_cpuidle_simple_enter(struct cpuidle_device *dev,
 9		struct cpuidle_driver *drv, int index);
10#else
11static inline int arm_cpuidle_simple_enter(struct cpuidle_device *dev,
12		struct cpuidle_driver *drv, int index) { return -ENODEV; }
13#endif
14
15/* Common ARM WFI state */
16#define ARM_CPUIDLE_WFI_STATE_PWR(p) {\
17	.enter                  = arm_cpuidle_simple_enter,\
18	.exit_latency           = 1,\
19	.target_residency       = 1,\
20	.power_usage		= p,\
21	.name                   = "WFI",\
22	.desc                   = "ARM WFI",\
23}
24
25/*
26 * in case power_specified == 1, give a default WFI power value needed
27 * by some governors
28 */
29#define ARM_CPUIDLE_WFI_STATE ARM_CPUIDLE_WFI_STATE_PWR(UINT_MAX)
30
31struct device_node;
32
33struct cpuidle_ops {
34	int (*suspend)(unsigned long arg);
35	int (*init)(struct device_node *, int cpu);
36};
37
38struct of_cpuidle_method {
39	const char *method;
40	const struct cpuidle_ops *ops;
41};
42
43#define CPUIDLE_METHOD_OF_DECLARE(name, _method, _ops)			\
44	static const struct of_cpuidle_method __cpuidle_method_of_table_##name \
45	__used __section(__cpuidle_method_of_table)			\
46	= { .method = _method, .ops = _ops }
47
48extern int arm_cpuidle_suspend(int index);
49
50extern int arm_cpuidle_init(int cpu);
51
52#endif