*/
extern void (*pm_idle)(void);
extern void (*pm_power_off)(void);
+extern void (*pm_power_off_prepare)(void);
typedef int __bitwise suspend_state_t;
#define PM_SUSPEND_MAX ((__force suspend_state_t) 4)
/**
- * struct pm_ops - Callbacks for managing platform dependent suspend states.
- * @valid: Callback to determine whether the given state can be entered.
- * Valid states are advertised in /sys/power/state but can still
- * be rejected by prepare or enter if the conditions aren't right.
- * There is a %pm_valid_only_mem function available that can be assigned
- * to this if you only implement mem sleep.
+ * struct pm_ops - Callbacks for managing platform dependent system sleep
+ * states.
*
- * @prepare: Prepare the platform for the given suspend state. Can return a
- * negative error code if necessary.
+ * @valid: Callback to determine if given system sleep state is supported by
+ * the platform.
+ * Valid (ie. supported) states are advertised in /sys/power/state. Note
+ * that it still may be impossible to enter given system sleep state if the
+ * conditions aren't right.
+ * There is the %pm_valid_only_mem function available that can be assigned
+ * to this if the platform only supports mem sleep.
*
- * @enter: Enter the given suspend state, must be assigned. Can return a
- * negative error code if necessary.
+ * @set_target: Tell the platform which system sleep state is going to be
+ * entered.
+ * @set_target() is executed right prior to suspending devices. The
+ * information conveyed to the platform code by @set_target() should be
+ * disregarded by the platform as soon as @finish() is executed and if
+ * @prepare() fails. If @set_target() fails (ie. returns nonzero),
+ * @prepare(), @enter() and @finish() will not be called by the PM core.
+ * This callback is optional. However, if it is implemented, the argument
+ * passed to @prepare(), @enter() and @finish() is meaningless and should
+ * be ignored.
*
- * @finish: Called when the system has left the given state and all devices
- * are resumed. The return value is ignored.
+ * @prepare: Prepare the platform for entering the system sleep state indicated
+ * by @set_target() or represented by the argument if @set_target() is not
+ * implemented.
+ * @prepare() is called right after devices have been suspended (ie. the
+ * appropriate .suspend() method has been executed for each device) and
+ * before the nonboot CPUs are disabled (it is executed with IRQs enabled).
+ * This callback is optional. It returns 0 on success or a negative
+ * error code otherwise, in which case the system cannot enter the desired
+ * sleep state (@enter() and @finish() will not be called in that case).
+ *
+ * @enter: Enter the system sleep state indicated by @set_target() or
+ * represented by the argument if @set_target() is not implemented.
+ * This callback is mandatory. It returns 0 on success or a negative
+ * error code otherwise, in which case the system cannot enter the desired
+ * sleep state.
+ *
+ * @finish: Called when the system has just left a sleep state, right after
+ * the nonboot CPUs have been enabled and before devices are resumed (it is
+ * executed with IRQs enabled). If @set_target() is not implemented, the
+ * argument represents the sleep state being left.
+ * This callback is optional, but should be implemented by the platforms
+ * that implement @prepare(). If implemented, it is always called after
+ * @enter() (even if @enter() fails).
*/
struct pm_ops {
int (*valid)(suspend_state_t state);
+ int (*set_target)(suspend_state_t state);
int (*prepare)(suspend_state_t state);
int (*enter)(suspend_state_t state);
int (*finish)(suspend_state_t state);
};
+extern struct pm_ops *pm_ops;
+
/**
* pm_set_ops - set platform dependent power management ops
* @pm_ops: The new power management operations to set.
*/
extern void pm_set_ops(struct pm_ops *pm_ops);
-extern struct pm_ops *pm_ops;
-extern int pm_suspend(suspend_state_t state);
-
extern int pm_valid_only_mem(suspend_state_t state);
/**
*/
extern void arch_suspend_enable_irqs(void);
+extern int pm_suspend(suspend_state_t state);
+
/*
* Device power management
*/
unsigned can_wakeup:1;
#ifdef CONFIG_PM
unsigned should_wakeup:1;
- pm_message_t prev_state;
- void * saved_state;
- struct device * pm_parent;
struct list_head entry;
#endif
};
-extern void device_pm_set_parent(struct device * dev, struct device * parent);
-
extern int device_power_down(pm_message_t state);
extern void device_power_up(void);
extern void device_resume(void);
#define device_may_wakeup(dev) \
(device_can_wakeup(dev) && (dev)->power.should_wakeup)
-extern int dpm_runtime_suspend(struct device *, pm_message_t);
-extern void dpm_runtime_resume(struct device *);
extern void __suspend_report_result(const char *function, void *fn, int ret);
#define suspend_report_result(fn, ret) \
#define device_set_wakeup_enable(dev,val) do{}while(0)
#define device_may_wakeup(dev) (0)
-static inline int dpm_runtime_suspend(struct device * dev, pm_message_t state)
-{
- return 0;
-}
-
-static inline void dpm_runtime_resume(struct device * dev)
-{
-}
-
#define suspend_report_result(fn, ret) do { } while (0)
static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
projects / karo-tx-linux.git / blobdiff