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