1. 10 3月, 2011 3 次提交
    • J
      RTC: Cleanup rtc_class_ops->irq_set_freq() · 696160fe
      John Stultz 提交于
      With the generic rtc code now emulating PIE mode irqs via an
      hrtimer, no one calls the rtc_class_ops->irq_set_freq call.
      
      This patch removes the hook and deletes the driver functions
      if no one else calls them.
      
      CC: Thomas Gleixner <tglx@linutronix.de>
      CC: Alessandro Zummo <a.zummo@towertech.it>
      CC: Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
      CC: rtc-linux@googlegroups.com
      Signed-off-by: NJohn Stultz <john.stultz@linaro.org>
      696160fe
    • J
      RTC: Cleanup rtc_class_ops->irq_set_state · 80d4bb51
      John Stultz 提交于
      With PIE mode interrupts now emulated in generic code via an hrtimer,
      no one calls rtc_class_ops->irq_set_state(), so this patch removes it
      along with driver implementations.
      
      CC: Thomas Gleixner <tglx@linutronix.de>
      CC: Alessandro Zummo <a.zummo@towertech.it>
      CC: Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
      CC: rtc-linux@googlegroups.com
      Signed-off-by: NJohn Stultz <john.stultz@linaro.org>
      80d4bb51
    • J
      RTC: Initialize kernel state from RTC · f44f7f96
      John Stultz 提交于
      Mark Brown pointed out a corner case: that RTC alarms should
      be allowed to be persistent across reboots if the hardware
      supported it.
      
      The rework of the generic layer to virtualize the RTC alarm
      virtualized much of the alarm handling, and removed the
      code used to read the alarm time from the hardware.
      
      Mark noted if we want the alarm to be persistent across
      reboots, we need to re-read the alarm value into the
      virtualized generic layer at boot up, so that the generic
      layer properly exposes that value.
      
      This patch restores much of the earlier removed
      rtc_read_alarm code and wires it in so that we
      set the kernel's alarm value to what we find in the
      hardware at boot time.
      
      NOTE: Not all hardware supports persistent RTC alarm state across
      system reset. rtc-cmos for example will keep the alarm time, but
      disables the AIE mode irq. Applications should not expect the RTC
      alarm to be valid after a system reset. We will preserve what
      we can, to represent the hardware state at boot, but its not
      guarenteed.
      
      Further, in the future, with multiplexed RTC alarms, the
      soonest alarm to fire may not be the one set via the /dev/rt
      ioctls. So an application may set the alarm with RTC_ALM_SET,
      but after a reset find that RTC_ALM_READ returns an earlier
      time. Again, we preserve what we can, but applications should
      not expect the RTC alarm state to persist across a system reset.
      
      Big thanks to Mark for pointing out the issue!
      Thanks also to Marcelo for helping think through the solution.
      
      CC: Mark Brown <broonie@opensource.wolfsonmicro.com>
      CC: Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
      CC: Thomas Gleixner <tglx@linutronix.de>
      CC: Alessandro Zummo <a.zummo@towertech.it>
      CC: rtc-linux@googlegroups.com
      Reported-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
      Signed-off-by: NJohn Stultz <john.stultz@linaro.org>
      f44f7f96
  2. 05 3月, 2011 1 次提交
  3. 26 2月, 2011 2 次提交
  4. 18 2月, 2011 3 次提交
  5. 12 2月, 2011 1 次提交
  6. 04 2月, 2011 4 次提交
  7. 22 1月, 2011 3 次提交
  8. 14 1月, 2011 4 次提交
  9. 11 1月, 2011 1 次提交
  10. 24 12月, 2010 1 次提交
    • T
      rtc: don't use flush_scheduled_work() · 9db8995b
      Tejun Heo 提交于
      flush_scheduled_work() is deprecated and scheduled to be removed.  On
      removal, directly cancel the work, and flush the uie_task in
      rtc-dev.c::clear_uie().
      Signed-off-by: NTejun Heo <tj@kernel.org>
      Cc: Alessandro Zummo <a.zummo@towertech.it>
      Cc: rtc-linux@googlegroups.com
      9db8995b
  11. 23 12月, 2010 1 次提交
  12. 21 12月, 2010 1 次提交
  13. 14 12月, 2010 1 次提交
  14. 11 12月, 2010 2 次提交
    • J
      RTC: Remove UIE emulation · 042620a0
      John Stultz 提交于
      Since we provide UIE interrupts via a rtc_timer, the old
      emulation code can be removed.
      Signed-off-by: NJohn Stultz <john.stultz@linaro.org>
      LKML Reference: <1290136329-18291-5-git-send-email-john.stultz@linaro.org>
      Acked-by: NAlessandro Zummo <a.zummo@towertech.it>
      Reviewed-by: NThomas Gleixner <tglx@linutronix.de>
      CC: Alessandro Zummo <a.zummo@towertech.it>
      CC: Thomas Gleixner <tglx@linutronix.de>
      CC: Richard Cochran <richardcochran@gmail.com>
      042620a0
    • J
      RTC: Rework RTC code to use timerqueue for events · 6610e089
      John Stultz 提交于
      This patch reworks a large portion of the generic RTC code
      to in-effect virtualize the rtc interrupt code.
      
      The current RTC interface is very much a raw hardware interface.
      Via the proc, /dev/, or sysfs interfaces, applciations can set
      the hardware to trigger interrupts in one of three modes:
      
      AIE: Alarm interrupt
      UIE: Update interrupt (ie: once per second)
      PIE: Periodic interrupt (sub-second irqs)
      
      The problem with this interface is that it limits the RTC hardware
      so it can only be used by one application at a time.
      
      The purpose of this patch is to extend the RTC code so that we can
      multiplex multiple applications event needs onto a single RTC device.
      This is done by utilizing the timerqueue infrastructure to manage
      a list of events, which cause the RTC hardware to be programmed
      to fire an interrupt for the next event in the list.
      
      In order to preserve the functionality of the exsting proc,/dev/ and
      sysfs interfaces, we emulate the different interrupt modes as follows:
      
      AIE: We create a rtc_timer dedicated to AIE mode interrupts. There is
      only one per device, so we don't change existing interface semantics.
      
      UIE: Again, a dedicated rtc_timer, set for periodic mode, is used
      to emulate UIE interrupts. Again, only one per device.
      
      PIE: Since PIE mode interrupts fire faster then the RTC's clock read
      granularity, we emulate PIE mode interrupts using a hrtimer. Again,
      one per device.
      
      With this patch, the rtctest.c application in Documentation/rtc.txt
      passes fine on x86 hardware. However, there may very well still be
      bugs, so greatly I'd appreciate any feedback or testing!
      Signed-off-by: NJohn Stultz <john.stultz@linaro.org>
      LKML Reference: <1290136329-18291-4-git-send-email-john.stultz@linaro.org>
      Acked-by: NAlessandro Zummo <a.zummo@towertech.it>
      Reviewed-by: NThomas Gleixner <tglx@linutronix.de>
      CC: Alessandro Zummo <a.zummo@towertech.it>
      CC: Thomas Gleixner <tglx@linutronix.de>
      CC: Richard Cochran <richardcochran@gmail.com>
      6610e089
  15. 29 11月, 2010 1 次提交
  16. 17 11月, 2010 1 次提交
  17. 11 11月, 2010 1 次提交
  18. 10 11月, 2010 3 次提交
  19. 08 11月, 2010 1 次提交
  20. 29 10月, 2010 4 次提交
  21. 28 10月, 2010 1 次提交