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linux/drivers/clocksource/timer-vf-pit.c

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-27 08:55:01 +02:00
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clocksource: vf_pit_timer: Use linux/sched_clock.h Commit 38ff87f7 (sched_clock: Make ARM's sched_clock generic for all architectures) changed the header to <linux/sched_clock.h>, so adapt it in order to fix the following build error: drivers/clocksource/vf_pit_timer.c:15:29: fatal error: asm/sched_clock.h: No such file or directory Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Cc: shawn.guo@linaro.org Cc: sboyd@codeaurora.org Cc: john.stultz@linaro.org Link: http://lkml.kernel.org/r/1372116008-2323-1-git-send-email-festevam@gmail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-24 20:20:08 -03:00
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clocksource/drivers/vf_pit_timer: Prevent ftrace recursion Having a traceable function in the sched_clock() path leads to a recursion within ftrace and a kernel crash. We should not trace the pit_read_sched_clock() function. Fix this by adding a notrace attribute to this function. Signed-off-by: Jisheng Zhang <jszhang@marvell.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2015-10-20 16:02:38 +08:00
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clocksource: vf_pit_timer: use complement for sched_clock reading Vybrids PIT register is monitonic decreasing. However, sched_clock reading needs to be monitonic increasing. Use bitwise not to get the complement of the clock register. This fixes the clock going backward. Also, the clock now starts at 0 since we load the register with the maximum value at start. Signed-off-by: Stefan Agner <stefan@agner.ch> Acked-by: Shawn Guo <shawn.guo@linaro.org> Cc: daniel.lezcano@linaro.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux@arm.linux.org.uk Link: http://lkml.kernel.org/r/d25af915993aec1b486be653eb86f748ddef54fe.1394057313.git.stefan@agner.ch Cc: stable@vger.kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-03-05 23:11:08 +01:00
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clocksource: vf_pit_timer: Switch to sched_clock_register() The 32 bit sched_clock interface now supports 64 bits. Upgrade to the 64 bit function to allow us to remove the 32 bit registration interface. Cc: Jingchang Lu <b35083@freescale.com> Cc: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: John Stultz <john.stultz@linaro.org>
2013-07-18 16:21:29 -07:00
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clockevents/drivers/vf_pit: Migrate to new 'set-state' interface Migrate vf_pit driver to the new 'set-state' interface provided by clockevents core, the earlier 'set-mode' interface is marked obsolete now. This also enables us to implement callbacks for new states of clockevent devices, for example: ONESHOT_STOPPED. Cc: Jingchang Lu <b35083@freescale.com> Cc: Stefan Agner <stefan@agner.ch> Cc: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Stefan Agner <stefan@agner.ch>
2015-06-18 16:24:53 +05:30
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clockevents/drivers/vf_pit: Migrate to new 'set-state' interface Migrate vf_pit driver to the new 'set-state' interface provided by clockevents core, the earlier 'set-mode' interface is marked obsolete now. This also enables us to implement callbacks for new states of clockevent devices, for example: ONESHOT_STOPPED. Cc: Jingchang Lu <b35083@freescale.com> Cc: Stefan Agner <stefan@agner.ch> Cc: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Stefan Agner <stefan@agner.ch>
2015-06-18 16:24:53 +05:30
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clockevents/drivers/vf_pit: Migrate to new 'set-state' interface Migrate vf_pit driver to the new 'set-state' interface provided by clockevents core, the earlier 'set-mode' interface is marked obsolete now. This also enables us to implement callbacks for new states of clockevent devices, for example: ONESHOT_STOPPED. Cc: Jingchang Lu <b35083@freescale.com> Cc: Stefan Agner <stefan@agner.ch> Cc: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Stefan Agner <stefan@agner.ch>
2015-06-18 16:24:53 +05:30
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clockevents/drivers/vf_pit: Migrate to new 'set-state' interface Migrate vf_pit driver to the new 'set-state' interface provided by clockevents core, the earlier 'set-mode' interface is marked obsolete now. This also enables us to implement callbacks for new states of clockevent devices, for example: ONESHOT_STOPPED. Cc: Jingchang Lu <b35083@freescale.com> Cc: Stefan Agner <stefan@agner.ch> Cc: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Stefan Agner <stefan@agner.ch>
2015-06-18 16:24:53 +05:30
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clocksource/drivers/vf_pit_timer: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-06 23:29:49 +02:00
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clocksource/drivers/vf_pit_timer: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-06 23:29:49 +02:00
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clocksource/drivers/vf_pit_timer: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-06 23:29:49 +02:00
clocksource: Add missing line break to error messages Printing with pr_* functions requires adding line break manually. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2017-03-09 10:47:10 +01:00
clocksource/drivers/vf_pit_timer: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-06 23:29:49 +02:00
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clocksource/drivers/vf_pit_timer: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-06 23:29:49 +02:00
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clocksource/drivers/vf_pit_timer: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-06 23:29:49 +02:00
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clocksource/drivers/vf_pit_timer: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-06 23:29:49 +02:00
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clocksource/drivers/vf_pit_timer: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-06 23:29:49 +02:00
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clocksource/drivers/vf_pit_timer: Convert init function to return error The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-06-06 23:29:49 +02:00
clocksource: Add Freescale Vybrid pit timer support Add Freescale Vybrid Family period interrupt timer support. Signed-off-by: Jingchang Lu <b35083@freescale.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-05-29 10:12:17 +02:00
clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLARE The CLOCKSOURCE_OF_DECLARE macro is used widely for the timers to declare the clocksource at early stage. However, this macro is also used to initialize the clockevent if any, or the clockevent only. It was originally suggested to declare another macro to initialize a clockevent, so in order to separate the two entities even they belong to the same IP. This was not accepted because of the impact on the DT where splitting a clocksource/clockevent definition does not make sense as it is a Linux concept not a hardware description. On the other side, the clocksource has not interrupt declared while the clockevent has, so it is easy from the driver to know if the description is for a clockevent or a clocksource, IOW it could be implemented at the driver level. So instead of dealing with a named clocksource macro, let's use a more generic one: TIMER_OF_DECLARE. The patch has not functional changes. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Neil Armstrong <narmstrong@baylibre.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Matthias Brugger <matthias.bgg@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
2017-05-26 16:56:11 +02:00