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
8 extern int arm_cpuidle_simple_enter(struct cpuidle_device *dev,
9 struct cpuidle_driver *drv, int index);
10 #else
arm_cpuidle_simple_enter(struct cpuidle_device * dev,struct cpuidle_driver * drv,int index)11 static 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
31 struct device_node;
32
33 struct cpuidle_ops {
34 int (*suspend)(unsigned long arg);
35 int (*init)(struct device_node *, int cpu);
36 };
37
38 struct 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
48 extern int arm_cpuidle_suspend(int index);
49
50 extern int arm_cpuidle_init(int cpu);
51
52 #endif
53
