| Alan Stern | 9a3df1f | 2008-03-19 22:39:13 +0100 | [diff] [blame] | 1 | /* |
| 2 | * pm_wakeup.h - Power management wakeup interface |
| 3 | * |
| 4 | * Copyright (C) 2008 Alan Stern |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
| 21 | #ifndef _LINUX_PM_WAKEUP_H |
| 22 | #define _LINUX_PM_WAKEUP_H |
| 23 | |
| 24 | #ifndef _DEVICE_H_ |
| 25 | # error "please don't include this file directly" |
| 26 | #endif |
| 27 | |
| 28 | #ifdef CONFIG_PM |
| 29 | |
| 30 | /* changes to device_may_wakeup take effect on the next pm state change. |
| 31 | * by default, devices should wakeup if they can. |
| 32 | */ |
| 33 | static inline void device_init_wakeup(struct device *dev, int val) |
| 34 | { |
| 35 | dev->power.can_wakeup = dev->power.should_wakeup = !!val; |
| 36 | } |
| 37 | |
| 38 | static inline int device_can_wakeup(struct device *dev) |
| 39 | { |
| 40 | return dev->power.can_wakeup; |
| 41 | } |
| 42 | |
| 43 | static inline void device_set_wakeup_enable(struct device *dev, int val) |
| 44 | { |
| 45 | dev->power.should_wakeup = !!val; |
| 46 | } |
| 47 | |
| 48 | static inline int device_may_wakeup(struct device *dev) |
| 49 | { |
| 50 | return dev->power.can_wakeup & dev->power.should_wakeup; |
| 51 | } |
| 52 | |
| 53 | /* |
| 54 | * Platform hook to activate device wakeup capability, if that's not already |
| 55 | * handled by enable_irq_wake() etc. |
| 56 | * Returns zero on success, else negative errno |
| 57 | */ |
| 58 | extern int (*platform_enable_wakeup)(struct device *dev, int is_on); |
| 59 | |
| 60 | static inline int call_platform_enable_wakeup(struct device *dev, int is_on) |
| 61 | { |
| 62 | if (platform_enable_wakeup) |
| 63 | return (*platform_enable_wakeup)(dev, is_on); |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | #else /* !CONFIG_PM */ |
| 68 | |
| 69 | /* For some reason the next two routines work even without CONFIG_PM */ |
| 70 | static inline void device_init_wakeup(struct device *dev, int val) |
| 71 | { |
| 72 | dev->power.can_wakeup = !!val; |
| 73 | } |
| 74 | |
| 75 | static inline int device_can_wakeup(struct device *dev) |
| 76 | { |
| 77 | return dev->power.can_wakeup; |
| 78 | } |
| 79 | |
| 80 | #define device_set_wakeup_enable(dev, val) do {} while (0) |
| 81 | #define device_may_wakeup(dev) 0 |
| 82 | |
| 83 | static inline int call_platform_enable_wakeup(struct device *dev, int is_on) |
| 84 | { |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | #endif /* !CONFIG_PM */ |
| 89 | |
| 90 | #endif /* _LINUX_PM_WAKEUP_H */ |