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Allow the timer core to change the smp affinity of the broadcast timer
irq by setting CLOCK_EVT_FEAT_DYNIRQ flag. For this to work the timer
core needs to be told about the used irq.
This reduces interrupt pressure and wakeups on CPU0 as well as vastly
reducing the number of timer broadcast IPIs.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Pull timer updates from Thomas Gleixner:
"Rather large, but nothing exiting:
- new range check for settimeofday() to prevent that boot time
becomes negative.
- fix for file time rounding
- a few simplifications of the hrtimer code
- fix for the proc/timerlist code so the output of clock realtime
timers is accurate
- more y2038 work
- tree wide conversion of clockevent drivers to the new callbacks"
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (88 commits)
hrtimer: Handle failure of tick_init_highres() gracefully
hrtimer: Unconfuse switch_hrtimer_base() a bit
hrtimer: Simplify get_target_base() by returning current base
hrtimer: Drop return code of hrtimer_switch_to_hres()
time: Introduce timespec64_to_jiffies()/jiffies_to_timespec64()
time: Introduce current_kernel_time64()
time: Introduce struct itimerspec64
time: Add the common weak version of update_persistent_clock()
time: Always make sure wall_to_monotonic isn't positive
time: Fix nanosecond file time rounding in timespec_trunc()
timer_list: Add the base offset so remaining nsecs are accurate for non monotonic timers
cris/time: Migrate to new 'set-state' interface
kernel: broadcast-hrtimer: Migrate to new 'set-state' interface
xtensa/time: Migrate to new 'set-state' interface
unicore/time: Migrate to new 'set-state' interface
um/time: Migrate to new 'set-state' interface
sparc/time: Migrate to new 'set-state' interface
sh/localtimer: Migrate to new 'set-state' interface
score/time: Migrate to new 'set-state' interface
s390/time: Migrate to new 'set-state' interface
...
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Commit 6dd747825b20 ("ARM: imx: move timer resources into a structure")
moved initialization parameters into a data structure, but neglected to set
the irq field in that data structure for non-DT boots. This causes the system
to hang if a non-DT boot is attempted.
Fixes: 6dd747825b20 ("ARM: imx: move timer resources into a structure")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: http://lkml.kernel.org/r/1440066441-13930-1-git-send-email-linux@roeck-us.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Migrate timer-imx-gpt driver to the new 'set-state' interface provided
by clockevents core, the earlier 'set-mode' interface is marked obsolete
now.
This also enables us to implement callbacks for new states of clockevent
devices, for example: ONESHOT_STOPPED.
Also drop:
- 'imx_timer.cem': It was caching the last state of the clockevent
device. The same behavior can be achieved by using clockevents state
helpers. These helpers are only required for oneshot mode as
shutdown/resume wouldn't be done twice by the core.
- 'clock_event_mode_label': CLOCK_EVT_MODE_* shouldn't be used anymore
by drivers. The prints are modified to print the set-state functions
name now to debug the driver.
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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The rework of the imx clocksource driver missed to add an entry for
imx27 which results in a boot failure on those machines.
Add the proper CLOCKSOURCE_OF_DECLARE() entry for imx27 and map it to
the imx21 init.
Fixes: bef11c881ba5 'ARM: imx: initialize gpt device type for DT boot'
Signed-off-by: Philippe Reynes <tremyfr@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: daniel.lezcano@linaro.org
Cc: fabio.estevam@freescale.com
Cc: shawnguo@kernel.org
Cc: kernel@pengutronix.de
Link: http://lkml.kernel.org/r/1435439504-406-1-git-send-email-tremyfr@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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The include of <asm/mach/time.h> is not needed at all, and causes build
error in some cases. Remove it.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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After the cleanup on imx timer driver, now it's ready to be moved into
drivers/clocksource/. Let's do it.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Lucas Stach
Linus Torvalds
Guenter Roeck
Viresh Kumar
Philippe Reynes
Shawn Guo