linux/drivers/pps/generators, branch v3.12.10

pps: remove unreachable code

2011-03-23T00:44:17Z

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: make pps_gen_parport depend on BROKEN

2011-03-05T01:53:38Z

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: claim parallel port exclusively

2011-01-26T00:50:00Z

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: add parallel port PPS signal generator

2011-01-13T16:03:21Z

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

2011-01-13T16:03:21Z

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