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| author | David Brownell <david-b@pacbell.net> | 2006-08-30 13:54:36 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-09-25 21:08:37 -0700 |
| commit | 2bca293e56b6a8cd16bb6e70a09b2adac9c723b5 (patch) | |
| tree | a67697a05fa718a2a03b603d8afbdcbae41d68bc | |
| parent | 047bda36150d11422b2c7bacca1df324c909c0b3 (diff) | |
| download | kernel_samsung_smdk4412-2bca293e56b6a8cd16bb6e70a09b2adac9c723b5.zip kernel_samsung_smdk4412-2bca293e56b6a8cd16bb6e70a09b2adac9c723b5.tar.gz kernel_samsung_smdk4412-2bca293e56b6a8cd16bb6e70a09b2adac9c723b5.tar.bz2 | |
PM: add kconfig option for deprecated .../power/state files
Add a new PM_SYSFS_DEPRECATED config option to control whether or
not the /sys/devices/.../power/state files are provided. This will
make it easier to get rid of that mechanism when the time comes,
and to verify that userspace tools work right without it.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/base/power/sysfs.c | 6 | ||||
| -rw-r--r-- | kernel/power/Kconfig | 11 |
2 files changed, 17 insertions, 0 deletions
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index e55b3c2..2d47517 100644 --- a/drivers/base/power/sysfs.c +++ b/drivers/base/power/sysfs.c @@ -7,6 +7,8 @@ #include "power.h" +#ifdef CONFIG_PM_SYSFS_DEPRECATED + /** * state - Control current power state of device * @@ -66,6 +68,8 @@ static ssize_t state_store(struct device * dev, struct device_attribute *attr, c static DEVICE_ATTR(state, 0644, state_show, state_store); +#endif /* CONFIG_PM_SYSFS_DEPRECATED */ + /* * wakeup - Report/change current wakeup option for device * @@ -139,7 +143,9 @@ static DEVICE_ATTR(wakeup, 0644, wake_show, wake_store); static struct attribute * power_attrs[] = { +#ifdef CONFIG_PM_SYSFS_DEPRECATED &dev_attr_state.attr, +#endif &dev_attr_wakeup.attr, NULL, }; diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig index 619ecab..1ed9720 100644 --- a/kernel/power/Kconfig +++ b/kernel/power/Kconfig @@ -53,6 +53,17 @@ config PM_TRACE CAUTION: this option will cause your machine's real-time clock to be set to an invalid time after a resume. +config PM_SYSFS_DEPRECATED + bool "Driver model /sys/devices/.../power/state files (DEPRECATED)" + depends on PM && SYSFS + default n + help + The driver model started out with a sysfs file intended to provide + a userspace hook for device power management. This feature has never + worked very well, except for limited testing purposes, and so it will + be removed. It's not clear that a generic mechanism could really + handle the wide variability of device power states; any replacements + are likely to be bus or driver specific. config SOFTWARE_SUSPEND bool "Software Suspend" |