17 Oct, 2007
1 commit
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Add kernel/kernel and kernel/user locking for the periodic irq feature of
the rtc class.PIE ioctls are also supported.
Signed-off-by: Alessandro Zummo
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Jul, 2007
1 commit
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This avoids use of the kernel-internal "xtime" variable directly outside
of the actual time-related functions. Instead, use the helper functions
that we already have available to us.This doesn't actually change any behaviour, but this will allow us to
fix the fact that "xtime" isn't updated very often with CONFIG_NO_HZ
(because much of the realtime information is maintained as separate
offsets to 'xtime'), which has caused interfaces that use xtime directly
to get a time that is out of sync with the real-time clock by up to a
third of a second or so.Signed-off-by: John Stultz
Cc: Ingo Molnar
Cc: Thomas Gleixner
Signed-off-by: Linus Torvalds
09 May, 2007
6 commits
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Fix a goof in the revised classdev support for RTCs: make sure the /dev
node info is ready before the device is registered, not after. Otherwise
the /sys/class/rtc/rtcN/dev attribute won't be created and then udev won't
have the information it needs to create the /dev/rtcN node.Signed-off-by: David Brownell
Cc: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
RTC class suspend/resume support, re-initializing the system clock on resume
from the clock used to initialize it at boot time.- The reinit-on-resume is hooked to the existing RTC_HCTOSYS config
option, on the grounds that a clock good enough for init must also
be good enough for re-init.- Inlining a version of the code used by ARM, to save and restore the
delta between a selected RTC and the current system wall-clock time.- Removes calls to that ARM code from AT91, OMAP1, and S3C RTCs. This
means that systems using those RTCs across suspend/resume will likely
want to change their kernel configs to enable RTC_HCTOSYS.If HCTOSYS isn't using a second RTC (with battery?), this changes the
system's initial date from Jan 1970 to the epoch this hardware uses:
1998 for AT91, 2000 for OMAP1 (assuming no split power mode), etc.This goes on top of the patch series removing "struct class_device" usage
from the RTC framework. That's all needed for class suspend()/resume().Signed-off-by: David Brownell
Acked-by: Greg Kroah-Hartman
Acked-By: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Finish converting the RTC framework so it no longer uses class_device.
Signed-off-by: David Brownell
Acked-by: Greg Kroah-Hartman
Acked-By: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This simplifies the RTC procfs support by removing the class_interface that
hooks it into the rtc core. If it's configured, then sysfs support is now
part of the RTC core, and is never a separate module.It also removes the class_interface hook, now that its last remaining user is
gone. (That API is usable only with a "struct class_device".)It's another step towards being able to remove "struct class_device".
Signed-off-by: David Brownell
Acked-by: Greg Kroah-Hartman
Acked-By: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This simplifies the RTC sysfs support by removing the class_interface that
hooks it into the rtc core. If it's configured, then sysfs support is now
part of the RTC core, and is never a separate module.It's another step towards being able to remove "struct class_device".
Signed-off-by: David Brownell
Acked-by: Greg Kroah-Hartman
Acked-By: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This simplifies the /dev support by removing a superfluous class_device (the
/sys/class/rtc-dev stuff) and the class_interface that hooks it into the rtc
core. Accordingly, if it's configured then /dev support is now part of the
RTC core, and is never a separate module.It's another step towards being able to remove "struct class_device".
[bunk@stusta.de: drivers/rtc/rtc-dev.c should #include "rtc-core.h"]
Signed-off-by: David Brownell
Acked-by: Greg Kroah-Hartman
Acked-By: Alessandro Zummo
Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
02 Mar, 2007
1 commit
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Fix an oops on the rtc_device_unregister() path by waiting until the last
moment before nulling the rtc->ops vector. Fix some potential oopses by
having the rtc_class_open()/rtc_class_close() interface increase the RTC's
reference count while an RTC handle is available outside the RTC framework.Signed-off-by: David Brownell
Cc: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Oct, 2006
2 commits
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Update RTC framework so that drivers can constify their method tables, moving
them from ".data" to ".rodata". Then update the drivers.Signed-off-by: David Brownell
Cc: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This makes RTC core components use "subsys_init" instead of "module_init", as
appropriate for subsystem infrastructure. This is mostly useful for
statically linking drivers in other parts of the tree that may provide an RTC
interface as a secondary functionality (e.g. part of a multifunction chip);
they won't need to worry so much about drivers/Makefile link order.Signed-off-by: David Brownell
Cc: Alessandro Zummo
Acked-by: Oleg Verych
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
28 Jun, 2006
1 commit
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We need to serialize access to the global rtc_idr even in this error path.
Signed-off-by: Sonny Rao
Acked-by: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Jun, 2006
1 commit
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Centralize CAP_SYS_XXX checks to avoid duplicate code and missing checks in
the drivers.Signed-off-by: Alessandro Zummo
Cc: Richard Purdie
Cc: Yoichi Yuasa
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Apr, 2006
1 commit
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Move registration error message from drivers to core.
Signed-off-by: Alessandro Zummo
Cc: Lennert Buytenhek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
28 Mar, 2006
1 commit
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Add the basic RTC subsystem infrastructure to the kernel.
rtc/class.c - registration facilities for RTC drivers
rtc/interface.c - kernel/rtc interface functions
rtc/hctosys.c - snippet of code that copies hw clock to sw clock
at bootup, if configured to do so.Signed-off-by: Alessandro Zummo
Acked-by: Greg Kroah-Hartman
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds