diff options
Diffstat (limited to 'include/linux/pm.h')
-rw-r--r-- | include/linux/pm.h | 33 |
1 files changed, 21 insertions, 12 deletions
diff --git a/include/linux/pm.h b/include/linux/pm.h index ed2b76e75199..14479325e3f3 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h | |||
@@ -103,7 +103,8 @@ extern int pm_active; | |||
103 | /* | 103 | /* |
104 | * Register a device with power management | 104 | * Register a device with power management |
105 | */ | 105 | */ |
106 | struct pm_dev __deprecated *pm_register(pm_dev_t type, unsigned long id, pm_callback callback); | 106 | struct pm_dev __deprecated * |
107 | pm_register(pm_dev_t type, unsigned long id, pm_callback callback); | ||
107 | 108 | ||
108 | /* | 109 | /* |
109 | * Unregister a device with power management | 110 | * Unregister a device with power management |
@@ -190,17 +191,18 @@ typedef u32 __bitwise pm_message_t; | |||
190 | /* | 191 | /* |
191 | * There are 4 important states driver can be in: | 192 | * There are 4 important states driver can be in: |
192 | * ON -- driver is working | 193 | * ON -- driver is working |
193 | * FREEZE -- stop operations and apply whatever policy is applicable to a suspended driver | 194 | * FREEZE -- stop operations and apply whatever policy is applicable to a |
194 | * of that class, freeze queues for block like IDE does, drop packets for | 195 | * suspended driver of that class, freeze queues for block like IDE |
195 | * ethernet, etc... stop DMA engine too etc... so a consistent image can be | 196 | * does, drop packets for ethernet, etc... stop DMA engine too etc... |
196 | * saved; but do not power any hardware down. | 197 | * so a consistent image can be saved; but do not power any hardware |
197 | * SUSPEND - like FREEZE, but hardware is doing as much powersaving as possible. Roughly | 198 | * down. |
198 | * pci D3. | 199 | * SUSPEND - like FREEZE, but hardware is doing as much powersaving as |
200 | * possible. Roughly pci D3. | ||
199 | * | 201 | * |
200 | * Unfortunately, current drivers only recognize numeric values 0 (ON) and 3 (SUSPEND). | 202 | * Unfortunately, current drivers only recognize numeric values 0 (ON) and 3 |
201 | * We'll need to fix the drivers. So yes, putting 3 to all diferent defines is intentional, | 203 | * (SUSPEND). We'll need to fix the drivers. So yes, putting 3 to all different |
202 | * and will go away as soon as drivers are fixed. Also note that typedef is neccessary, | 204 | * defines is intentional, and will go away as soon as drivers are fixed. Also |
203 | * we'll probably want to switch to | 205 | * note that typedef is neccessary, we'll probably want to switch to |
204 | * typedef struct pm_message_t { int event; int flags; } pm_message_t | 206 | * typedef struct pm_message_t { int event; int flags; } pm_message_t |
205 | * or something similar soon. | 207 | * or something similar soon. |
206 | */ | 208 | */ |
@@ -222,11 +224,18 @@ struct dev_pm_info { | |||
222 | 224 | ||
223 | extern void device_pm_set_parent(struct device * dev, struct device * parent); | 225 | extern void device_pm_set_parent(struct device * dev, struct device * parent); |
224 | 226 | ||
225 | extern int device_suspend(pm_message_t state); | ||
226 | extern int device_power_down(pm_message_t state); | 227 | extern int device_power_down(pm_message_t state); |
227 | extern void device_power_up(void); | 228 | extern void device_power_up(void); |
228 | extern void device_resume(void); | 229 | extern void device_resume(void); |
229 | 230 | ||
231 | #ifdef CONFIG_PM | ||
232 | extern int device_suspend(pm_message_t state); | ||
233 | #else | ||
234 | static inline int device_suspend(pm_message_t state) | ||
235 | { | ||
236 | return 0; | ||
237 | } | ||
238 | #endif | ||
230 | 239 | ||
231 | #endif /* __KERNEL__ */ | 240 | #endif /* __KERNEL__ */ |
232 | 241 | ||