linux/drivers/clocksource, branch v2.6.32.32

clocksource: sh_tmu: compute mult and shift before registration

2010-09-27T00:21:37Z

commit 66f49121ffa41a19c59965b31b046d8368fec3c7 upstream. Since commit 98962465ed9e6ea99c38e0af63fe1dcb5a79dc25 ("nohz: Prevent clocksource wrapping during idle"), the CPU of an R2D board never goes to idle. This commit assumes that mult and shift are assigned before the clocksource is registered. As a consequence the safe maximum sleep time is negative and the CPU never goes into idle. This patch fixes the problem by moving mult and shift initialization from sh_tmu_clocksource_enable() to sh_tmu_register_clocksource(). Signed-off-by: Aurelien Jarno Signed-off-by: Paul Mundt Signed-off-by: Greg Kroah-Hartman

clocksource: sh_cmt: compute mult and shift before registration

2010-07-05T18:11:02Z

commit f4d7c3565c1692c54d9152b52090fe73f0029e37 upstream. Based on the sh_tmu change in 66f49121ffa41a19c59965b31b046d8368fec3c7 ("clocksource: sh_tmu: compute mult and shift before registration"). The same issues impact the sh_cmt driver, so we take the same approach here. Signed-off-by: Paul Mundt Signed-off-by: Greg Kroah-Hartman

clocksource: Fix up a registration/IRQ race in the sh drivers.

2010-03-15T15:49:44Z

commit da64c2a8dee66ca03f4f3e15d84be7bedf73db3d upstream. All of the SH clocksource drivers follow the scheme that the IRQ is setup prior to registering the clockevent. The interrupt handler in the clockevent cases looks to the event handler function pointer being filled in by the registration code, permitting us to get in to situations where asserted IRQs step in to the handler before registration has had a chance to complete and hitting a NULL pointer deref. In practice this is not an issue for most platforms, but some of them with fairly special loaders (or that are chain-loading from another kernel) may enter in to this situation. This fixes up the oops reported by Rafael on hp6xx. Reported-and-tested-by: Rafael Ignacio Zurita Signed-off-by: Paul Mundt Signed-off-by: Greg Kroah-Hartman

sh: CMT suspend/resume

2009-08-15T03:58:45Z

This patch updates the SuperH CMT driver with suspend and resume callbacks for the suspend-to-ram case. This patch stops the CMT channel at suspend time to avoid unwanted wake up events. Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt

clocksource: sh_tmu: Make undefined TCOR behaviour less undefined.

2009-06-24T12:08:11Z

Avoid undocumented vague TMU behavior when zero value is set to TCOR. This primarily fixes up issues encountered under qemu with a zero-length period, while the hardware itself is fairly ambivalent one way or the other. Signed-off-by: Shin-ichiro KAWASAKI Acked-by: Magnus Damm Signed-off-by: Paul Mundt

Merge branches 'sh/pci-express-integration', 'sh/rsk-updates', 'sh/platform-updates' and 'sh/perf_counter'

2009-06-17T07:37:26Z

sh: turn off irqs when disabling CMT/TMU timers

2009-06-17T06:39:56Z

Modify the CMT and TMU drivers to disable interrupts when disabling the timer. Only using start/stop bits is not enough. This fixes a bootup hang on Migo-R when the CMT is replaced by TMU for clockevents but the CMT keeps on delivering irqs even though the timer start bit is off. Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt

time: move PIT_TICK_RATE to linux/timex.h

2009-06-17T02:47:27Z

PIT_TICK_RATE is currently defined in four architectures, but in three different places. While linux/timex.h is not the perfect place for it, it is still a reasonable replacement for those drivers that traditionally use asm/timex.h to get CLOCK_TICK_RATE and expect it to be the PIT frequency. Note that for Alpha, the actual value changed from 1193182UL to 1193180UL. This is unlikely to make a difference, and probably can only improve accuracy. There was a discussion on the correct value of CLOCK_TICK_RATE a few years ago, after which every existing instance was getting changed to 1193182. According to the specification, it should be 1193181.818181... Signed-off-by: Arnd Bergmann Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Ralf Baechle Cc: Benjamin Herrenschmidt Cc: Ingo Molnar Cc: Thomas Gleixner Cc: "H. Peter Anvin" Cc: Len Brown Cc: john stultz Cc: Dmitry Torokhov Cc: Takashi Iwai Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

clocksource: Drop unused irqaction.mask from SH drivers.

2009-06-14T12:18:24Z

The irqaction.mask is legacy code that is wholly unused and going away, so simply drop its use in the SH drivers completely. Fixes up build failures in -next. Signed-off-by: Paul Mundt

clocksource: sh_mtu2/cmt_register() should be static.

2009-05-03T09:05:42Z

Neither of these need to be exported, so just make them static. Signed-off-by: Paul Mundt