linux-toradex.git/drivers/pps, branch v3.0.79

Fix common misspellings

2011-03-31T14:26:23+00:00

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi

pps: remove unreachable code

2011-03-23T00:44:17+00:00

Remove code enabled only when CONFIG_PREEMPT_RT is turned on because it is
not used in the vanilla kernel.

Signed-off-by: Alexander Gordeev 
Cc: john stultz 
Cc: Rodolfo Giometti 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

pps: change to new flag variable

2011-03-17T13:05:35+00:00

Replace EXTRA_CFLAGS with ccflags-y.

Signed-off-by: matt mooney 
Acked-by: WANG Cong 
Signed-off-by: Michal Marek

pps: make pps_gen_parport depend on BROKEN

2011-03-05T01:53:38+00:00

This driver causes hard lockups, when the active clock soure is jiffies.

The reason is that it loops with interrupts disabled waiting for a
timestamp to be reached by polling getnstimeofday().  Though with a
jiffies clocksource, when that code runs on the same CPU which is
responsible for updating jiffies, then we loop in circles for ever
simply because the timer interrupt cannot update jiffies.  So both UP
and SMP can be affected.

There is no easy fix for that problem so make it depend on BROKEN for
now.

Signed-off-by: Thomas Gleixner 
Cc: Alexander Gordeev 
Cc: Rodolfo Giometti 
Cc: john stultz 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

pps: initialize ts_real properly

2011-02-25T23:07:37+00:00

Initialize ts_real.flags to fix compiler warning about possible
uninitialized use of this field.

Signed-off-by: Alexander Gordeev 
Cc: john stultz 
Cc: Rodolfo Giometti 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

pps: claim parallel port exclusively

2011-01-26T00:50:00+00:00

Both pps_parport and pps_gen_parport are written in a way that they
can't share a port with any other driver.  This can result in locking up
the process that loads modules or even the whole kernel if the modules
are compiled in.  Use PARPORT_FLAG_EXCL to indicate this.

Signed-off-by: Alexander Gordeev 
Cc: Alexander Gordeev 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

pps ktimer: remove noisy message

2011-01-26T00:49:59+00:00

Signed-off-by: Rodolfo Giometti 
Reported-by: Ingo Molnar 
Cc: Alexander Gordeev 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

pps: add parallel port PPS signal generator

2011-01-13T16:03:21+00:00

Add PPS signal generator which utilizes STROBE pin of a parallel port to
send PPS signals.  It uses parport abstraction layer and hrtimers to
precisely control the signal.

Signed-off-by: Alexander Gordeev 
Cc: Rodolfo Giometti 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

pps: add parallel port PPS signal generator

2011-01-13T16:03:21+00:00

Add PPS signal generator which utilizes STROBE pin of a parallel port to
send PPS signals.  It uses parport abstraction layer and hrtimers to
precisely control the signal.

[akpm@linux-foundation.org: fix build]
Signed-off-by: Alexander Gordeev 
Acked-by: Rodolfo Giometti 
Cc: john stultz 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

pps: add parallel port PPS client

2011-01-13T16:03:21+00:00

Add parallel port PPS client.  It uses a standard method for capturing
timestamps for assert edge transitions: getting a timestamp soon after an
interrupt has happened.

This is not a very precise source of time information due to interrupt
handling delays.  However, timestamps for clear edge transitions are much
more precise because the interrupt handler continuously polls hardware
port until the transition is done.

Hardware port operations require only about 1us so the maximum error
should not exceed this value.  This was my primary goal when developing
this client.

Clear edge capture could be disabled using clear_wait parameter.

Signed-off-by: Alexander Gordeev 
Acked-by: Rodolfo Giometti 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds