From 228c54ef7a028d5a4b6606eb0c8035874d9b6788 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Mon, 15 Mar 2010 21:44:41 +0100 Subject: PM: pm_wakeup - switch to using bool Also change couple of stubs implemented as macros in !CONFIG_PM case in statinc inline functions to provide proper typechecking of arguments regardless of config. Signed-off-by: Dmitry Torokhov Signed-off-by: Rafael J. Wysocki --- include/linux/pm_wakeup.h | 38 ++++++++++++++++++++++++-------------- 1 file changed, 24 insertions(+), 14 deletions(-) (limited to 'include/linux') diff --git a/include/linux/pm_wakeup.h b/include/linux/pm_wakeup.h index 0aae7776185e..22d64c18056c 100644 --- a/include/linux/pm_wakeup.h +++ b/include/linux/pm_wakeup.h @@ -25,32 +25,34 @@ # error "please don't include this file directly" #endif +#include + #ifdef CONFIG_PM /* changes to device_may_wakeup take effect on the next pm state change. * by default, devices should wakeup if they can. */ -static inline void device_init_wakeup(struct device *dev, int val) +static inline void device_init_wakeup(struct device *dev, bool val) { - dev->power.can_wakeup = dev->power.should_wakeup = !!val; + dev->power.can_wakeup = dev->power.should_wakeup = val; } -static inline void device_set_wakeup_capable(struct device *dev, int val) +static inline void device_set_wakeup_capable(struct device *dev, bool capable) { - dev->power.can_wakeup = !!val; + dev->power.can_wakeup = capable; } -static inline int device_can_wakeup(struct device *dev) +static inline bool device_can_wakeup(struct device *dev) { return dev->power.can_wakeup; } -static inline void device_set_wakeup_enable(struct device *dev, int val) +static inline void device_set_wakeup_enable(struct device *dev, bool enable) { - dev->power.should_wakeup = !!val; + dev->power.should_wakeup = enable; } -static inline int device_may_wakeup(struct device *dev) +static inline bool device_may_wakeup(struct device *dev) { return dev->power.can_wakeup && dev->power.should_wakeup; } @@ -58,20 +60,28 @@ static inline int device_may_wakeup(struct device *dev) #else /* !CONFIG_PM */ /* For some reason the next two routines work even without CONFIG_PM */ -static inline void device_init_wakeup(struct device *dev, int val) +static inline void device_init_wakeup(struct device *dev, bool val) { - dev->power.can_wakeup = !!val; + dev->power.can_wakeup = val; } -static inline void device_set_wakeup_capable(struct device *dev, int val) { } +static inline void device_set_wakeup_capable(struct device *dev, bool capable) +{ +} -static inline int device_can_wakeup(struct device *dev) +static inline bool device_can_wakeup(struct device *dev) { return dev->power.can_wakeup; } -#define device_set_wakeup_enable(dev, val) do {} while (0) -#define device_may_wakeup(dev) 0 +static inline void device_set_wakeup_enable(struct device *dev, bool enable) +{ +} + +static inline bool device_may_wakeup(struct device *dev) +{ + return false; +} #endif /* !CONFIG_PM */ -- cgit v1.2.3 From 6a727b43be8b005609e893a80af980808012cfdb Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Sat, 1 May 2010 23:51:22 +0200 Subject: FS / libfs: Implement simple_write_to_buffer It will be used in suspend code and serves as an easy wrap around copy_from_user. Similar to simple_read_from_buffer, it takes care of transfers with proper lengths depending on available and count parameters and advances ppos appropriately. Signed-off-by: Jiri Slaby Signed-off-by: Rafael J. Wysocki --- include/linux/fs.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/fs.h b/include/linux/fs.h index 44f35aea2f1f..948bd2bfb1de 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2362,6 +2362,8 @@ extern void simple_release_fs(struct vfsmount **mount, int *count); extern ssize_t simple_read_from_buffer(void __user *to, size_t count, loff_t *ppos, const void *from, size_t available); +extern ssize_t simple_write_to_buffer(void *to, size_t available, loff_t *ppos, + const void __user *from, size_t count); extern int simple_fsync(struct file *, struct dentry *, int); -- cgit v1.2.3 From ed77134bfccf5e75b6cbadab268e559dbe6a4ebb Mon Sep 17 00:00:00 2001 From: Mark Gross Date: Thu, 6 May 2010 01:59:26 +0200 Subject: PM QOS update This patch changes the string based list management to a handle base implementation to help with the hot path use of pm-qos, it also renames much of the API to use "request" as opposed to "requirement" that was used in the initial implementation. I did this because request more accurately represents what it actually does. Also, I added a string based ABI for users wanting to use a string interface. So if the user writes 0xDDDDDDDD formatted hex it will be accepted by the interface. (someone asked me for it and I don't think it hurts anything.) This patch updates some documentation input I got from Randy. Signed-off-by: markgross Signed-off-by: Rafael J. Wysocki --- include/linux/netdevice.h | 4 ++++ include/linux/pm_qos_params.h | 14 ++++++++------ 2 files changed, 12 insertions(+), 6 deletions(-) (limited to 'include/linux') diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index fa8b47637997..3857517f1ca5 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -31,6 +31,7 @@ #include #ifdef __KERNEL__ +#include #include #include #include @@ -711,6 +712,9 @@ struct net_device { * the interface. */ char name[IFNAMSIZ]; + + struct pm_qos_request_list *pm_qos_req; + /* device name hash chain */ struct hlist_node name_hlist; /* snmp alias */ diff --git a/include/linux/pm_qos_params.h b/include/linux/pm_qos_params.h index d74f75ed1e47..8ba440e5eb7f 100644 --- a/include/linux/pm_qos_params.h +++ b/include/linux/pm_qos_params.h @@ -14,12 +14,14 @@ #define PM_QOS_NUM_CLASSES 4 #define PM_QOS_DEFAULT_VALUE -1 -int pm_qos_add_requirement(int qos, char *name, s32 value); -int pm_qos_update_requirement(int qos, char *name, s32 new_value); -void pm_qos_remove_requirement(int qos, char *name); +struct pm_qos_request_list; -int pm_qos_requirement(int qos); +struct pm_qos_request_list *pm_qos_add_request(int pm_qos_class, s32 value); +void pm_qos_update_request(struct pm_qos_request_list *pm_qos_req, + s32 new_value); +void pm_qos_remove_request(struct pm_qos_request_list *pm_qos_req); -int pm_qos_add_notifier(int qos, struct notifier_block *notifier); -int pm_qos_remove_notifier(int qos, struct notifier_block *notifier); +int pm_qos_request(int pm_qos_class); +int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier); +int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier); -- cgit v1.2.3 From 2f60ba706bd9af84c4eab704243b262e69556f2e Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 10 May 2010 23:09:30 +0200 Subject: i2c: Fix bus-level power management callbacks There are three issues with the i2c bus type's power management callbacks at the moment. First, they don't include any hibernate callbacks, although they should at least include the .restore() callback (there's no guarantee that the driver will be present in memory before loading the image kernel and we must restore the pre-hibernation state of the device). Second, the "legacy" callbacks are not going to be invoked by the PM core since the bus type's pm object is not NULL. Finally, the system sleep PM (ie. suspend/resume) callbacks don't check if the device has been already suspended at run time, in which case they should skip suspending it. Also, it looks like the i2c bus type can use the generic subsystem-level runtime PM callbacks. For these reasons, rework the system sleep PM callbacks provided by the i2c bus type to handle hibernation correctly and to invoke the "legacy" callbacks for drivers that provide them. In addition to that make the i2c bus type use the generic subsystem-level runtime PM callbacks. Signed-off-by: Rafael J. Wysocki Acked-by: Mark Brown Acked-by: Jean Delvare --- include/linux/pm_runtime.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/linux') diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h index b776db737244..6e81888c6222 100644 --- a/include/linux/pm_runtime.h +++ b/include/linux/pm_runtime.h @@ -30,6 +30,9 @@ extern void pm_runtime_enable(struct device *dev); extern void __pm_runtime_disable(struct device *dev, bool check_resume); extern void pm_runtime_allow(struct device *dev); extern void pm_runtime_forbid(struct device *dev); +extern int pm_generic_runtime_idle(struct device *dev); +extern int pm_generic_runtime_suspend(struct device *dev); +extern int pm_generic_runtime_resume(struct device *dev); static inline bool pm_children_suspended(struct device *dev) { @@ -96,6 +99,10 @@ static inline bool device_run_wake(struct device *dev) { return false; } static inline void device_set_run_wake(struct device *dev, bool enable) {} static inline bool pm_runtime_suspended(struct device *dev) { return false; } +static inline int pm_generic_runtime_idle(struct device *dev) { return 0; } +static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } +static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } + #endif /* !CONFIG_PM_RUNTIME */ static inline int pm_runtime_get(struct device *dev) -- cgit v1.2.3