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  1. 22 2月, 2013 29 次提交
  3. 13 2月, 2013 1 次提交
  5. 05 2月, 2013 3 次提交
  7. 30 1月, 2013 1 次提交
  9. 16 1月, 2013 3 次提交
    • F
      timekeeping: Add CONFIG_HAS_PERSISTENT_CLOCK option · 05ad717c
      由 Feng Tang 提交于 
      Make the persistent clock check a kernel config option, so that some
platform can explicitely select it, also make CONFIG_RTC_HCTOSYS and
RTC_SYSTOHC depend on its non-existence, which could prevent the
persistent clock and RTC code from doing similar thing twice during
system's init/suspend/resume phases.

If the CONFIG_HAS_PERSISTENT_CLOCK=n, then no change happens for kernel
which still does the persistent clock check in timekeeping_init().

Cc: Thomas Gleixner <tglx@linutronix.de>
Suggested-by: NJohn Stultz <john.stultz@linaro.org>
Signed-off-by: NFeng Tang <feng.tang@intel.com>
[jstultz: Added dependency for RTC_SYSTOHC as well]
Signed-off-by: NJohn Stultz <john.stultz@linaro.org>
      05ad717c
    • F
      rtc: Skip the suspend/resume handling if persistent clock exist · 9ecf37eb
      由 Feng Tang 提交于 
      All the RTC suspend and resume functions are to compensate the
sleep time, but this is already done in timekeeping.c if persistent
clock exist.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Arve Hjønnevåg <arve@android.com>
Signed-off-by: NFeng Tang <feng.tang@intel.com>
Signed-off-by: NJohn Stultz <john.stultz@linaro.org>
      9ecf37eb
    • J
      NTP: Add a CONFIG_RTC_SYSTOHC configuration · 023f333a
      由 Jason Gunthorpe 提交于 
      The purpose of this option is to allow ARM/etc systems that rely on the
class RTC subsystem to have the same kind of automatic NTP based
synchronization that we have on PC platforms. Today ARM does not
implement update_persistent_clock and makes extensive use of the class
RTC system.

When enabled CONFIG_RTC_SYSTOHC will provide a generic
rtc_update_persistent_clock that stores the current time in the RTC and
is intended complement the existing CONFIG_RTC_HCTOSYS option that loads
the RTC at boot.

Like with RTC_HCTOSYS the platform's update_persistent_clock is used
first, if it works. Platforms with mixed class RTC and non-RTC drivers
need to return ENODEV when class RTC should be used. Such an update for
PPC is included in this patch.

Long term, implementations of update_persistent_clock should migrate to
proper class RTC drivers and use CONFIG_RTC_SYSTOHC instead.

Tested on ARM kirkwood and PPC405
Signed-off-by: NJason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: NJohn Stultz <john.stultz@linaro.org>
      023f333a
  11. 12 1月, 2013 1 次提交
  13. 05 1月, 2013 2 次提交