diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/device.h | 2 | ||||
| -rw-r--r-- | include/linux/pm.h | 32 |
2 files changed, 29 insertions, 5 deletions
diff --git a/include/linux/device.h b/include/linux/device.h index 2c5d57283d5a..786e1591102b 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -61,7 +61,7 @@ struct bus_type { int (*match)(struct device * dev, struct device_driver * drv); int (*hotplug) (struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size); - int (*suspend)(struct device * dev, u32 state); + int (*suspend)(struct device * dev, pm_message_t state); int (*resume)(struct device * dev); }; diff --git a/include/linux/pm.h b/include/linux/pm.h index 68da2eae8547..22c7aeb6419e 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -222,10 +222,34 @@ extern int pm_suspend(suspend_state_t state); struct device; +typedef u32 __bitwise pm_message_t; + +/* + * There are 4 important states driver can be in: + * ON -- driver is working + * FREEZE -- stop operations and apply whatever policy is applicable to a suspended driver + * of that class, freeze queues for block like IDE does, drop packets for + * ethernet, etc... stop DMA engine too etc... so a consistent image can be + * saved; but do not power any hardware down. + * SUSPEND - like FREEZE, but hardware is doing as much powersaving as possible. Roughly + * pci D3. + * + * Unfortunately, current drivers only recognize numeric values 0 (ON) and 3 (SUSPEND). + * We'll need to fix the drivers. So yes, putting 3 to all diferent defines is intentional, + * and will go away as soon as drivers are fixed. Also note that typedef is neccessary, + * we'll probably want to switch to + * typedef struct pm_message_t { int event; int flags; } pm_message_t + * or something similar soon. + */ + +#define PMSG_FREEZE ((__force pm_message_t) 3) +#define PMSG_SUSPEND ((__force pm_message_t) 3) +#define PMSG_ON ((__force pm_message_t) 0) + struct dev_pm_info { - u32 power_state; + pm_message_t power_state; #ifdef CONFIG_PM - u32 prev_state; + pm_message_t prev_state; void * saved_state; atomic_t pm_users; struct device * pm_parent; @@ -235,8 +259,8 @@ struct dev_pm_info { extern void device_pm_set_parent(struct device * dev, struct device * parent); -extern int device_suspend(u32 state); -extern int device_power_down(u32 state); +extern int device_suspend(pm_message_t state); +extern int device_power_down(pm_message_t state); extern void device_power_up(void); extern void device_resume(void); |