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David Brownell 3925a5ce44 [PATCH] RTC gets sysfs wakealarm attribute ... This adds a new "wakealarm" sysfs attribute to RTC class devices which support alarm operations and are wakeup-capable: - It reads as either empty, or the scheduled alarm time as seconds since the POSIX epoch. (That time may already have passed, since nothing currently enforces one-shot alarm semantics.) - It can be written with an alarm time in the future, again seconds since the POSIX epoch, which enables the alarm. - It can be written with an alarm time not in the future (such as 0, the start of the POSIX epoch) to disable the alarm. Usage examples (some need GNU date) after "cd /sys/class/rtc/rtcN": alarm after 10 minutes: # echo $(( $(cat since_epoch) + 10 * 60 )) > wakealarm alarm tuesday evening 10pm: # date -d '10pm tuesday' "+%s" > wakealarm disable alarm: # echo 0 > wakealarm This resembles the /proc/acpi/alarm file in that nothing happens when the alarm triggers ... except possibly waking the system from sleep. It's also like that in a nasty way: not much can be done to prevent one task from clobbering another task's alarm settings. It differs from that file in that there's no in-kernel date parser. Note that a few RTCs ignore rtc_wkalrm.enabled when setting alarms, or aren't set up correctly, so they won't yet behave with this attribute. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		18 years ago
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Kconfig	[PATCH] RTC framework driver for CMOS RTCs	18 years ago
Makefile	[PATCH] RTC framework driver for CMOS RTCs	18 years ago
class.c	[PATCH] constify rtc_class_ops: update drivers	19 years ago
hctosys.c	…
interface.c	[PATCH] rtc class locking bugfixes	18 years ago
rtc-at91rm9200.c	[PATCH] rtc-at91rm9200 build fix	18 years ago
rtc-cmos.c	[PATCH] RTC framework driver for CMOS RTCs	18 years ago
rtc-dev.c	[PATCH] trivial __user annotations - rtc-dev	18 years ago
rtc-ds1307.c	[PATCH] RTC: build fixes	19 years ago
rtc-ds1553.c	[PATCH] change __init to __devinit in 2 rtc drivers	18 years ago
rtc-ds1672.c	[PATCH] RTCs don't use i2c_adapter.dev	18 years ago
rtc-ds1742.c	[PATCH] change __init to __devinit in 2 rtc drivers	18 years ago
rtc-ep93xx.c	[PATCH] constify rtc_class_ops: update drivers	19 years ago
rtc-isl1208.c	[PATCH] constify rtc_class_ops: update drivers	19 years ago
rtc-lib.c	[PATCH] rtc: Add rtc_merge_alarm()	18 years ago
rtc-m48t86.c	[PATCH] constify rtc_class_ops: update drivers	19 years ago
rtc-max6902.c	[PATCH] rtc-max6902: month conversion fix	19 years ago
rtc-omap.c	[PATCH] rtc framewok: rtc_wkalrm.enabled reporting updates	18 years ago
rtc-pcf8563.c	[PATCH] rtc-pcf8563: detect polarity of century bit automatically	18 years ago
rtc-pcf8583.c	[PATCH] constify rtc_class_ops: update drivers	19 years ago
rtc-pl031.c	IRQ: Maintain regs pointer globally rather than passing to IRQ handlers	19 years ago
rtc-proc.c	[PATCH] rtc framewok: rtc_wkalrm.enabled reporting updates	18 years ago
rtc-rs5c348.c	[PATCH] constify rtc_class_ops: update drivers	19 years ago
rtc-rs5c372.c	[PATCH] Update the rtc-rs5c372 driver	18 years ago
rtc-s3c.c	[PATCH] rtc framewok: rtc_wkalrm.enabled reporting updates	18 years ago
rtc-sa1100.c	[PATCH] rtc framewok: rtc_wkalrm.enabled reporting updates	18 years ago
rtc-sh.c	[PATCH] rtc-sh: act on rtc_wkalrm.enabled when setting an alarm	18 years ago
rtc-sysfs.c	[PATCH] RTC gets sysfs wakealarm attribute	18 years ago
rtc-test.c	[PATCH] RTC: handle sysfs errors	18 years ago
rtc-v3020.c	[PATCH] rtc: fix printk of 64-bit res on 32-bit platform	19 years ago
rtc-vr41xx.c	IRQ: Maintain regs pointer globally rather than passing to IRQ handlers	19 years ago
rtc-x1205.c	[PATCH] RTCs don't use i2c_adapter.dev	18 years ago