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#define __cpuidle_method_section __used __section("__cpuidle_method_of_table")
11#else
12static inline int arm_cpuidle_simple_enter(struct cpuidle_device *dev,
13		struct cpuidle_driver *drv, int index) { return -ENODEV; }
14#define __cpuidle_method_section __maybe_unused /* drop silently */
15#endif
16
17/* Common ARM WFI state */
18#define ARM_CPUIDLE_WFI_STATE_PWR(p) {\
19	.enter                  = arm_cpuidle_simple_enter,\
20	.exit_latency           = 1,\
21	.target_residency       = 1,\
22	.power_usage		= p,\
23	.name                   = "WFI",\
24	.desc                   = "ARM WFI",\
25}
26
27/*
28 * in case power_specified == 1, give a default WFI power value needed
29 * by some governors
30 */
31#define ARM_CPUIDLE_WFI_STATE ARM_CPUIDLE_WFI_STATE_PWR(UINT_MAX)
32
33struct device_node;
34
35struct cpuidle_ops {
36	int (*suspend)(unsigned long arg);
37	int (*init)(struct device_node *, int cpu);
38};
39
40struct of_cpuidle_method {
41	const char *method;
42	const struct cpuidle_ops *ops;
43};
44
45#define CPUIDLE_METHOD_OF_DECLARE(name, _method, _ops)			\
46	static const struct of_cpuidle_method __cpuidle_method_of_table_##name \
47	__cpuidle_method_section = { .method = _method, .ops = _ops }
48
49extern int arm_cpuidle_suspend(int index);
50
51extern int arm_cpuidle_init(int cpu);
52
53struct arm_cpuidle_irq_context { };
54
55#define arm_cpuidle_save_irq_context(c)		(void)c
56#define arm_cpuidle_restore_irq_context(c)	(void)c
57
58#endif