Changes in Kconfig

c89755d1 - pps: generators: Add PPS Generator TIO Driver

Wed, 19 Feb 2025 04:06:16 +0000

pps: generators: Add PPS Generator TIO DriverThe Intel Timed IO PPS generator driver outputs a PPS signal usingdedicated hardware that is more accurate than software actuated PPS.The Timed IO hardware generates output events using the ART timer.The ART timer period varies based on platform type, but is less than 100nanoseconds for all current platforms. Timed IO output accuracy iswithin 1 ART period.PPS output is enabled by writing '1' the 'enable' sysfs attribute. Thedriver uses hrtimers to schedule a wake-up 10 ms before each event(edge) target time. At wakeup, the driver converts the target time interms of CLOCK_REALTIME to ART trigger time and writes this to the TimedIO hardware. The Timed IO hardware generates an event precisely at therequested system time without software involvement.Co-developed-by: Christopher Hall Signed-off-by: Christopher Hall Co-developed-by: Pandith N Signed-off-by: Pandith N Co-developed-by: Thejesh Reddy T R Signed-off-by: Thejesh Reddy T R Signed-off-by: Lakshmi Sowjanya D Reviewed-by: Eddie Dong Reviewed-by: Andy Shevchenko Acked-by: Rodolfo Giometti Signed-off-by: Subramanian Mohan Link: https://lore.kernel.org/r/20250219040618.70962-3-subramanian.mohan@intel.comSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/pps/generators/Kconfig

580afe4a - drivers pps/generators: add dummy PPS generator

Fri, 08 Nov 2024 07:31:13 +0000

drivers pps/generators: add dummy PPS generatorThis dummy PPS generator can be used for debugging and documentationpurposes.Signed-off-by: Rodolfo Giometti Link: https://lore.kernel.org/r/20241108073115.759039-3-giometti@enneenne.comSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/pps/generators/Kconfig

86b525be - drivers pps: add PPS generators support

Fri, 08 Nov 2024 07:31:12 +0000

drivers pps: add PPS generators supportSometimes one needs to be able not only to catch PPS signals but toproduce them also. For example, running a distributed simulation,which requires computers' clock to be synchronized very tightly.This patch adds PPS generators class in order to have a well-definedinterface for these devices.Signed-off-by: Rodolfo Giometti Link: https://lore.kernel.org/r/20241108073115.759039-2-giometti@enneenne.comSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/pps/generators/Kconfig

ec8f24b7 - treewide: Add SPDX license identifier - Makefile/Kconfig

Sun, 19 May 2019 12:07:45 +0000

treewide: Add SPDX license identifier - Makefile/KconfigAdd SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any formThese files fall under the project license, GPL v2 only. The resulting SPDXlicense identifier is: GPL-2.0-onlySigned-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/pps/generators/Kconfig

ab4f5260 - drivers/pps: use surrounding "if PPS" to remove numerous dependency checks

Fri, 08 Sep 2017 23:17:22 +0000

drivers/pps: use surrounding "if PPS" to remove numerous dependency checksAdding high-level "if PPS" makes lower-level dependency tests superfluous.Link: http://lkml.kernel.org/r/alpine.LFD.2.20.1708261050500.8156@localhost.localdomainSigned-off-by: Robert P. J. Day Acked-by: Rodolfo Giometti Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/drivers/pps/generators/Kconfig

98e959d4 - drivers: pps: Make PPS into a menuconfig to ease disabling

Tue, 11 Apr 2017 14:26:41 +0000

drivers: pps: Make PPS into a menuconfig to ease disablingSo that there's no need to get into the submenu to disable all related configentries.The BROKEN PPS_GENERATOR_PARPORT now also depends on PPSSigned-off-by: Vincent Legoll Acked-by: Rodolfo Giometti Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/pps/generators/Kconfig

95b90afe - pps: make pps_gen_parport depend on BROKEN

Sat, 05 Mar 2011 01:36:23 +0000

pps: make pps_gen_parport depend on BROKENThis driver causes hard lockups, when the active clock soure is jiffies.The reason is that it loops with interrupts disabled waiting for atimestamp to be reached by polling getnstimeofday(). Though with ajiffies clocksource, when that code runs on the same CPU which isresponsible for updating jiffies, then we loop in circles for eversimply because the timer interrupt cannot update jiffies. So both UPand SMP can be affected.There is no easy fix for that problem so make it depend on BROKEN fornow.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 List of files: /linux-6.15/drivers/pps/generators/Kconfig

563558b2 - pps: add parallel port PPS signal generator

Thu, 13 Jan 2011 01:01:00 +0000

pps: add parallel port PPS signal generatorAdd PPS signal generator which utilizes STROBE pin of a parallel port tosend PPS signals. It uses parport abstraction layer and hrtimers toprecisely control the signal.Signed-off-by: Alexander Gordeev Cc: Rodolfo Giometti Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/drivers/pps/generators/Kconfig

46b402a0 - pps: add parallel port PPS signal generator

Thu, 13 Jan 2011 01:00:59 +0000

pps: add parallel port PPS signal generatorAdd PPS signal generator which utilizes STROBE pin of a parallel port tosend PPS signals. It uses parport abstraction layer and hrtimers toprecisely 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 List of files: /linux-6.15/drivers/pps/generators/Kconfig