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 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