linux/drivers/clocksource/tegra20_timer.c, branch v4.19

Merge branch 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2018-08-14T01:28:19Z

Pull x86 timer updates from Thomas Gleixner: "Early TSC based time stamping to allow better boot time analysis. This comes with a general cleanup of the TSC calibration code which grew warts and duct taping over the years and removes 250 lines of code. Initiated and mostly implemented by Pavel with help from various folks" * 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (37 commits) x86/kvmclock: Mark kvm_get_preset_lpj() as __init x86/tsc: Consolidate init code sched/clock: Disable interrupts when calling generic_sched_clock_init() timekeeping: Prevent false warning when persistent clock is not available sched/clock: Close a hole in sched_clock_init() x86/tsc: Make use of tsc_calibrate_cpu_early() x86/tsc: Split native_calibrate_cpu() into early and late parts sched/clock: Use static key for sched_clock_running sched/clock: Enable sched clock early sched/clock: Move sched clock initialization and merge with generic clock x86/tsc: Use TSC as sched clock early x86/tsc: Initialize cyc2ns when tsc frequency is determined x86/tsc: Calibrate tsc only once ARM/time: Remove read_boot_clock64() s390/time: Remove read_boot_clock64() timekeeping: Default boot time offset to local_clock() timekeeping: Replace read_boot_clock64() with read_persistent_wall_and_boot_offset() s390/time: Add read_persistent_wall_and_boot_offset() x86/xen/time: Output xen sched_clock time from 0 x86/xen/time: Initialize pv xen time in init_hypervisor_platform() ...

clocksource/drivers: Set clockevent device cpumask to cpu_possible_mask

2018-07-26T09:26:30Z

Currently, quite a few clockevent devices have cpumask set to cpu_all_mask which should be fine. However, cpu_possible_mask is more accurate and if there are any other clockevent devices in the system which have cpumask set to cpu_possible_mask, then having cpu_all_mask may result in issues (mostly boot hang with forever loops in clockevents_notify_released). So, lets replace all the clockevent device cpu_all_mask to cpu_possible_mask in order to prevent above mentioned possible issue. Cc: Daniel Lezcano Cc: Thomas Gleixner Cc: Thierry Reding Cc: Jonathan Hunter Cc: Santosh Shilimkar Signed-off-by: Sudeep Holla Signed-off-by: Daniel Lezcano

ARM/time: Remove read_boot_clock64()

2018-07-19T22:02:41Z

read_boot_clock64() is deleted, and replaced with read_persistent_wall_and_boot_offset(). The default implementation of read_persistent_wall_and_boot_offset() provides a better fallback than the current stubs for read_boot_clock64() that arm has with no users, so remove the old code. Signed-off-by: Pavel Tatashin Signed-off-by: Thomas Gleixner Cc: steven.sistare@oracle.com Cc: daniel.m.jordan@oracle.com Cc: linux@armlinux.org.uk Cc: schwidefsky@de.ibm.com Cc: heiko.carstens@de.ibm.com Cc: john.stultz@linaro.org Cc: sboyd@codeaurora.org Cc: hpa@zytor.com Cc: douly.fnst@cn.fujitsu.com Cc: peterz@infradead.org Cc: prarit@redhat.com Cc: feng.tang@intel.com Cc: pmladek@suse.com Cc: gnomes@lxorguk.ukuu.org.uk Cc: linux-s390@vger.kernel.org Cc: boris.ostrovsky@oracle.com Cc: jgross@suse.com Cc: pbonzini@redhat.com Link: https://lkml.kernel.org/r/20180719205545.16512-19-pasha.tatashin@oracle.com

clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLARE

2017-06-14T09:58:45Z

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 Acked-by: Heiko Stuebner Acked-by: Neil Armstrong Acked-by: Arnd Bergmann Acked-by: Matthias Brugger Reviewed-by: Linus Walleij

clocksource: Add missing line break to error messages

2017-04-07T14:23:04Z

Printing with pr_* functions requires adding line break manually. Signed-off-by: Rafał Miłecki Acked-by: Thierry Reding Signed-off-by: Daniel Lezcano

clocksources: Switch back to the clksrc table

2016-06-28T08:19:35Z

All the clocksource drivers's init function are now converted to return an error code. CLOCKSOURCE_OF_DECLARE is no longer used as well as the clksrc-of table. Let's convert back the names: - CLOCKSOURCE_OF_DECLARE_RET => CLOCKSOURCE_OF_DECLARE - clksrc-of-ret => clksrc-of Signed-off-by: Daniel Lezcano For exynos_mct and samsung_pwm_timer: Acked-by: Krzysztof Kozlowski For arch/arc: Acked-by: Vineet Gupta For mediatek driver: Acked-by: Matthias Brugger For the Rockchip-part Acked-by: Heiko Stuebner For STi : Acked-by: Patrice Chotard For the mps2-timer.c and versatile.c changes: Acked-by: Liviu Dudau For the OXNAS part : Acked-by: Neil Armstrong For LPC32xx driver: Acked-by: Sylvain Lemieux For Broadcom Kona timer change: Acked-by: Ray Jui For Sun4i and Sun5i: Acked-by: Chen-Yu Tsai For Meson6: Acked-by: Carlo Caione For Keystone: Acked-by: Santosh Shilimkar For NPS: Acked-by: Noam Camus For bcm2835: Acked-by: Eric Anholt

clocksource/drivers/tegra20: Convert init function to return error

2016-06-28T08:19:27Z

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

clocksource/drivers/tegra: Remove unused suspend/resume code

2016-04-28T13:09:08Z

The tegra_timer_suspend() and tegra_timer_resume() functions are never used, so they can be removed. Signed-off-by: Thierry Reding Signed-off-by: Daniel Lezcano

clocksource/drivers/tegra: Allow timer irq affinity change

2015-12-15T08:41:06Z

Allow the timer core to change the smp affinity of the broadcast timer irq by setting CLOCK_EVT_FEAT_DYNIRQ flag. This reduces interrupt pressure and wakeups on CPU0 as well as vastly reducing the number of timer broadcast IPIs. Signed-off-by: Lucas Stach Signed-off-by: Daniel Lezcano

clockevents/drivers/tegra20: Migrate to new 'set-state' interface

2015-08-10T09:40:40Z

Migrate tegra20 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: Thierry Reding Cc: Stephen Warren Signed-off-by: Viresh Kumar Signed-off-by: Daniel Lezcano