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Linux kernel mirror (for testing)
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linux
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