diff options
| author | Alessandro Zummo <a.zummo@towertech.it> | 2009-01-04 12:00:54 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-04 13:33:20 -0800 |
| commit | 099e657625e801adf82054c8050dde5aceb68452 (patch) | |
| tree | d6c28df68ab390fa237b8339c6081e4db380aa5f /drivers/rtc/Kconfig | |
| parent | 54566b2c1594c2326a645a3551f9d989f7ba3c5e (diff) | |
| download | lwn-099e657625e801adf82054c8050dde5aceb68452.tar.gz lwn-099e657625e801adf82054c8050dde5aceb68452.zip | |
rtc: add alarm/update irq interfaces
Add standard interfaces for alarm/update irqs enabling. Drivers are no
more required to implement equivalent ioctl code as rtc-dev will provide
it.
UIE emulation should now be handled correctly and will work even for those
RTC drivers who cannot be configured to do both UIE and AIE.
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Cc: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc/Kconfig')
| -rw-r--r-- | drivers/rtc/Kconfig | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 123092d8a984..165a81843357 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -102,9 +102,13 @@ config RTC_INTF_DEV_UIE_EMUL depends on RTC_INTF_DEV help Provides an emulation for RTC_UIE if the underlying rtc chip - driver does not expose RTC_UIE ioctls. Those requests generate + driver does not expose RTC_UIE ioctls. Those requests generate once-per-second update interrupts, used for synchronization. + The emulation code will read the time from the hardware + clock several times per second, please enable this option + only if you know that you really need it. + config RTC_DRV_TEST tristate "Test driver/device" help |