linux-toradex.git/drivers/clocksource/cs5535-clockevt.c, branch v4.3.3

clockevents/drivers/cs5535: Migrate to new 'set-state' interface

2015-08-06T10:16:42+00:00

Migrate cs5535 driver to the new 'set-state' interface provided by
the 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.

Acked-by: Daniel Lezcano 
Cc: Andres Salomon 
Signed-off-by: Viresh Kumar 
Signed-off-by: Daniel Lezcano

clocksource: misc drivers: Remove deprecated IRQF_DISABLED

2013-12-11T10:40:27+00:00

This patch removes the use of the IRQF_DISABLED flag

It's a NOOP since 2.6.35 and it will be removed one day.

[dlezcano] : slightly changed the changelog

Signed-off-by: Michael Opdenacker 
Signed-off-by: Daniel Lezcano

clocksource: use clockevents_config_and_register() where possible

2013-01-14T18:12:42+00:00

The clockevent core is able to figure out the best mult and shift,
calculate min_delta_ns and max_delta_ns, with the necessary info passed
into clockevents_config_and_register().  Use this combined configure
and register function where possible to make the codes less error prone
and gain some positive diff stat.

Signed-off-by: Shawn Guo 
Cc: Andres Salomon 
Cc: Nicolas Ferre 
Acked-by: Maxime Ripard 
Acked-by: Arnd Bergmann 
Reviewed-by: Thomas Gleixner 
Signed-off-by: Olof Johansson

cs5535-clockevt: typo, it's MFGPT, not MFPGT

2012-08-21T23:45:02+00:00

Signed-off-by: Jens Rottmann 
Cc: Thomas Gleixner 
Cc: John Stultz 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cs5535-clockevt: Allow the MFGPT IRQ to be shared

2012-03-06T13:17:45+00:00

Shared timer IRQs are not a good solution, however the Geode platform has
no APIC, IRQs are a scarce resource and there is no technical reason to
forbid it rightaway.  Increased latencies and overhead due to sharing are
still better than a driver refusing to load.

Signed-off-by: Jens Rottmann 
Acked-by: Andres Salomon 
Cc: John Stultz 
Signed-off-by: Andrew Morton 
Signed-off-by: Thomas Gleixner

cs5535-clockevt: Don't ignore MFGPT on SMP-capable kernels

2012-03-06T13:17:44+00:00

On SMP-capable kernels (e.g.  generic distro kernel) the cs5535-clockevt
driver loads but is not actually used.

Setting cpumask to cpu_all_mask works for UP-only kernels, but if compiled
for SMP - though still running on the same UP hardware -
kernel/time/tick-common.c:tick_check_new_device() reads this as
"non-cpu-local" and silently ignores the device.

If we leave cpumask unset clockevents_register_device() will initialize it
and the cs5535-clockevt driver will be used no matter how the kernel was
compiled.  Should anyone ever manage to stick a CS553x in an SMP system
(is this even possible?) then a warning will be printed.  This is fine as
the cs5535-clockevt driver was never written/tested for SMP.

If bisecting led you here this patch may have exposed a pre-existing MFGPT
problem.  Configure for UP-only and re-check.

Signed-off-by: Jens Rottmann 
Acked-by: Andres Salomon 
Cc: John Stultz 
Signed-off-by: Andrew Morton 
Signed-off-by: Thomas Gleixner

Andres has moved

2010-07-20T23:25:41+00:00

My Collabora address is no longer enabled - update the MODULE_AUTHOR
fields of drivers to my current email address.

Signed-off-by: Andres Salomon 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cs5535-clockevt: Free timer in IRQ setup error path

2010-03-12T21:52:00+00:00

Due to a hardware limitation cs5535_mfgpt_free_timer() cannot actually
release the timer hardware, but it will at least free the now unreferenced
struct associated with it so calling it is the cleaner thing to do.

Signed-off-by: Jens Rottmann 
Acked-by: Andres Salomon 
Cc: Jordan Crouse 
Cc: Ingo Molnar 
Cc: john stultz 
Signed-off-by: Andrew Morton 
Signed-off-by: Thomas Gleixner

geode-mfgpt: restore previous behavior for selecting IRQ

2010-02-23T03:50:34+00:00

geode-mfgpt: restore previous behavior for selecting IRQ

The MFGPT IRQ used to be, in order of decreasing priority,
 * IRQ supplied by the user as a boot-time parameter,
 * IRQ previously set by the BIOS or another driver,
 * default IRQ given at compile time.

Return to this behavior, which got broken when splitting the
MFGPT/clocksource driver for 2.6.33-rc1.

Signed-off-by: Jens Rottmann 
Acked-by: Andres Salomon 
Cc: Jordan Crouse 
Cc: Ingo Molnar 
Cc: john stultz 
Acked-by: Thomas Gleixner 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cs5535: add a generic clock event MFGPT driver

2009-12-15T16:53:28+00:00

This is based on the old code in arch/x86/kernel/mfgpt_32.c, but is
modular and not Geode-specific.  There's no reason why the clock event
device needs to be registered so early at boot; the clockevent code is
perfectly capable of dynamic switching.

[akpm@linux-foundation.org: add linux/irq.h include]
Signed-off-by: Andres Salomon 
Cc: Jordan Crouse 
Cc: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: john stultz 
Cc: Chris Ball 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds