arch/arm/include/asm/cpuidle.h

   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