include/linux/platform.h

   1 /*
   2  * include/linux/platform.h - platform driver definitions
   3  *
   4  * Because of the prolific consumerism of the average American,
   5  * and the dominant marketing budgets of PC OEMs, we have been
   6  * blessed with frequent updates of the PC architecture.
   7  *
   8  * While most of these calls are singular per architecture, they
   9  * require an extra layer of abstraction on the x86 so the right
  10  * subsystem gets the right call.
  11  *
  12  * Basically, this consolidates the power off and reboot callbacks
  13  * into one structure, as well as adding power management hooks.
  14  *
  15  * When adding a platform driver, please make sure all callbacks are
  16  * filled. There are defaults defined below that do nothing; use those
  17  * if you do not support that callback.
  18  */
  19
  20 #ifndef _PLATFORM_H_
  21 #define _PLATFORM_H_
  22 #ifdef __KERNEL__
  23
  24 #include <linux/types.h>
  25
  26 struct platform_t {
  27         char    * name;
  28         u32     suspend_states;
  29         void    (*reboot)(char * cmd);
  30         void    (*halt)(void);
  31         void    (*power_off)(void);
  32         int     (*suspend)(int state, int flags);
  33         void    (*idle)(void);
  34 };
  35
  36 extern struct platform_t * platform;
  37 extern void default_reboot(char * cmd);
  38 extern void default_halt(void);
  39 extern int default_suspend(int state, int flags);
  40 extern void default_idle(void);
  41
  42 #endif /* __KERNEL__ */
  43 #endif /* _PLATFORM_H */