#define PM_SUSPEND_ON ((__force suspend_state_t) 0)
#define PM_SUSPEND_STANDBY ((__force suspend_state_t) 1)
#define PM_SUSPEND_MEM ((__force suspend_state_t) 3)
-#define PM_SUSPEND_DISK ((__force suspend_state_t) 4)
-#define PM_SUSPEND_MAX ((__force suspend_state_t) 5)
-
-typedef int __bitwise suspend_disk_method_t;
-
-#define PM_DISK_FIRMWARE ((__force suspend_disk_method_t) 1)
-#define PM_DISK_PLATFORM ((__force suspend_disk_method_t) 2)
-#define PM_DISK_SHUTDOWN ((__force suspend_disk_method_t) 3)
-#define PM_DISK_REBOOT ((__force suspend_disk_method_t) 4)
-#define PM_DISK_TEST ((__force suspend_disk_method_t) 5)
-#define PM_DISK_TESTPROC ((__force suspend_disk_method_t) 6)
-#define PM_DISK_MAX ((__force suspend_disk_method_t) 7)
+#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.
- * If %CONFIG_SOFTWARE_SUSPEND is set then %PM_SUSPEND_DISK is
- * always valid and never passed to this call.
- * If not assigned, all suspend states are advertised as valid
- * in /sys/power/state (but can still be rejected by prepare or enter.)
+ * struct pm_ops - Callbacks for managing platform dependent system sleep
+ * states.
+ *
+ * @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.
*
- * @prepare: Prepare the platform for the given suspend state. 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.
*
- * @enter: Enter the given suspend state, must be assigned. Can return a
- * negative error code if necessary.
+ * @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).
*
- * @finish: Called when the system has left the given state and all devices
- * are resumed. The return value is ignored.
+ * @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.
*
- * @pm_disk_mode: Set to the disk method that the user should be able to
- * configure for suspend-to-disk. Since %PM_DISK_SHUTDOWN,
- * %PM_DISK_REBOOT, %PM_DISK_TEST and %PM_DISK_TESTPROC
- * are always allowed, currently only %PM_DISK_PLATFORM
- * makes sense. If the user then choses %PM_DISK_PLATFORM,
- * the @prepare call will be called before suspending to disk
- * (if present), the @enter call should be present and will
- * be called after all state has been saved and the machine
- * is ready to be shut down/suspended/..., and the @finish
- * callback is called after state has been restored. All
- * these calls are called with %PM_SUSPEND_DISK as the 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);
- suspend_disk_method_t pm_disk_mode;
};
+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);
/**
* arch_suspend_disable_irqs - disable IRQs for suspend
*/
extern void arch_suspend_enable_irqs(void);
+extern int pm_suspend(suspend_state_t state);
+
/*
* Device power management
*/
extern void device_resume(void);
#ifdef CONFIG_PM
-extern suspend_disk_method_t pm_disk_mode;
-
extern int device_suspend(pm_message_t state);
extern int device_prepare_suspend(pm_message_t state);
static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
{
- return -EIO;
+ return 0;
}
#endif