linux-toradex.git/drivers/clocksource/sh_cmt.c, branch v3.4.45

PM / shmobile: Make CMT driver use pm_genpd_dev_always_on()

2012-03-16T20:45:13+00:00

Make the CMT clocksource driver mark its device as "always on"
using pm_genpd_dev_always_on() to protect it from surprise power
removals.

Signed-off-by: Rafael J. Wysocki 
Tested-by: Simon Horman 
Acked-by: Paul Mundt 
Cc: stable@vger.kernel.org

drivers/clocksource: Add module.h to those who were using it implicitly

2011-10-31T23:31:42+00:00

A pending cleanup will mean that module.h won't be implicitly
everywhere anymore.  Make sure the modular drivers in clocksource
are actually calling out for  explicitly in advance.

Signed-off-by: Paul Gortmaker

clocksource: sh_cmt: wait for CMCNT on init V2

2011-07-21T07:16:51+00:00

Add code to the CMT driver to wait for CMCNT V2. This to let
the register value settle before starting the timer channel.
Makes the driver more robust.

Needed for CMT2 on sh7372 and certain CMT channels on sh73a0.

Signed-off-by: Magnus Damm 
Signed-off-by: Paul Mundt

Revert "clocksource: sh_cmt: Runtime PM support"

2011-05-31T06:26:42+00:00

This reverts commit 01fa68b58492a5d6708a91c1f474b6a099a9509e.

The same note as per the sh_tmu change applies here, too.

Signed-off-by: Paul Mundt

clocksource: sh_cmt: Runtime PM support

2011-05-23T05:34:02+00:00

Add Runtime PM support to the CMT driver.

The hardware device is enabled as long as the clocksource
or the clockevent portion of the driver is used.

Signed-off-by: Magnus Damm 
Acked-by: John Stultz 
Signed-off-by: Paul Mundt

clocksource: sh_cmt: __clocksource_updatefreq_hz() update

2011-05-23T05:33:59+00:00

This patch updates the clocksource part of the CMT driver
to make use of the __clocksource_updatefreq_hz() function.

Without this patch the old code uses clocksource_register()
together with a hack that assumes a never changing clock rate
(see clk_enable(), clk_get_rate() and clk_disable()).

The patch uses clocksource_register_hz() with 1 Hz as initial
value, then lets the ->enable() callback update the value
with __clocksource_updatefreq_hz() once the struct clk has
been enabled and the frequency is stable.

Signed-off-by: Magnus Damm 
Acked-by: John Stultz 
Signed-off-by: Paul Mundt

clocksource: sh_cmt: Remove nested spinlock fix

2010-12-17T10:38:33+00:00

There are control flow that sh_cmt_set_next() does double
spin-lock. The callers sh_cmt_{start,stop}() already have
lock. But another callers sh_cmt_clock_event_{start,next}()
does not.

Now sh_cmt_set_next() does not lock by itself. All the
callers should hold spin-lock before calling it.

[damm@opensource.se: use __sh_cmt_set_next() to simplify code]
[damm@opensource.se: added stable, suitable for v2.6.35 + v2.6.36]
Cc: stable@kernel.org
Signed-off-by: Takashi YOSHII 
Signed-off-by: Magnus Damm 
Signed-off-by: Paul Mundt

ARM: shmobile: remove sh_timer_config clk member

2010-10-31T14:40:39+00:00

Now when the SH-Mobile ARM platforms have been converted
to use device name it is possible to remove "clk" from
struct sh_timer_config.

Signed-off-by: Magnus Damm 
Signed-off-by: Paul Mundt

clocksource: sh_cmt: Rate calculation fix

2010-08-04T07:01:29+00:00

Fix the rate calculation in the CMT driver.
Without this fix the clocksource runs way
too fast and we get a divide-by-zero error.

Signed-off-by: Magnus Damm 
Signed-off-by: Paul Mundt

clocksource: sh_cmt: One-off clockevent fix V2

2010-08-04T07:01:24+00:00

Fix a one-off error in the CMT driver V2. The match register
should be programmed with the period minus one.

Many thanks to Eiraku-san for tracking down this issue.

Signed-off-by: Magnus Damm 
Signed-off-by: Paul Mundt