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linux/drivers/clocksource
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Ding Tianhong bb42ca4740 clocksource/drivers/arm_arch_timer: Work around Hisilicon erratum 161010101 
Erratum Hisilicon-161010101 says that the ARM generic timer counter "has
the potential to contain an erroneous value when the timer value
changes". Accesses to TVAL (both read and write) are also affected due
to the implicit counter read. Accesses to CVAL are not affected.

The workaround is to reread the system count registers until the value
of the second read is larger than the first one by less than 32, the
system counter can be guaranteed not to return wrong value twice by
back-to-back read and the error value is always larger than the correct
one by 32. Writes to TVAL are replaced with an equivalent write to CVAL.

Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
[Mark: split patch, fix Kconfig, reword commit message]
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2017-02-08 00:14:04 +01:00
..
acpi_pm.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
arc_timer.c Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-25 14:30:04 -08:00
arm_arch_timer.c clocksource/drivers/arm_arch_timer: Work around Hisilicon erratum 161010101 2017-02-08 00:14:04 +01:00
arm_global_timer.c Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-25 14:30:04 -08:00
armv7m_systick.c clocksource/drivers/armv7m_systick: Add the COMPILE_TEST option 2016-06-28 10:22:05 +02:00
asm9260_timer.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
bcm2835_timer.c clocksource/drivers/bcm2835_timer: Unmap region obtained by of_iomap 2016-11-22 09:22:59 +01:00
bcm_kona_timer.c clocksource/drivers/kona: Fix get_counter() error handling 2016-08-17 13:08:31 +02:00
cadence_ttc_timer.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
clkevt-probe.c clockevents: Add a clkevt-of mechanism like clksrc-of 2017-02-07 20:58:30 +01:00
clksrc-dbx500-prcmu.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
clksrc-probe.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
clksrc_st_lpc.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
clps711x-timer.c ARM: SoC driver updates for v4.8 2016-08-01 18:36:01 -04:00
cs5535-clockevt.c clockevents/drivers/cs5535: Migrate to new 'set-state' interface 2015-08-06 12:16:42 +02:00
dummy_timer.c cpu/hotplug: Cleanup state names 2016-12-25 10:47:44 +01:00
dw_apb_timer.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
dw_apb_timer_of.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
em_sti.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
exynos_mct.c Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-25 14:30:04 -08:00
fsl_ftm_timer.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
h8300_timer8.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
h8300_timer16.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
h8300_tpu.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
i8253.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
jcore-pit.c Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-25 14:30:04 -08:00
Kconfig clocksource/drivers/arm_arch_timer: Work around Hisilicon erratum 161010101 2017-02-08 00:14:04 +01:00
Makefile clocksource/drivers/ostm: Add renesas-ostm timer driver 2017-02-07 20:58:30 +01:00
meson6_timer.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
metag_generic.c Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-25 14:30:04 -08:00
mips-gic-timer.c Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-25 14:30:04 -08:00
mmio.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
moxart_timer.c clocksource/drivers/moxart: Plug memory and mapping leaks 2016-12-19 11:19:57 +01:00
mps2-timer.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
mtk_timer.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
mxs_timer.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
nomadik-mtu.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
numachip.c x86/numachip: Fix timer build conflict 2015-09-23 05:39:20 +02:00
pxa_timer.c ARM: sa11x0/pxa: acquire timer rate from the clock rate 2016-10-18 09:12:36 +02:00
qcom-timer.c Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-25 14:30:04 -08:00
renesas-ostm.c clocksource/drivers/ostm: Add renesas-ostm timer driver 2017-02-07 20:58:30 +01:00
rockchip_timer.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
samsung_pwm_timer.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
scx200_hrt.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
sh_cmt.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
sh_mtu2.c clocksource/drivers/sh_mtu2: Fix multiple shutdown call issue 2015-10-28 15:22:56 +01:00
sh_tmu.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
sun4i_timer.c clocksource/drivers/sun4i: Clear interrupts after stopping timer in probe function 2016-08-26 15:56:01 +02:00
tango_xtal.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
tcb_clksrc.c clocksource/drivers/tcb_clksrc: Use 32 bit tcb as sched_clock 2017-02-07 20:58:30 +01:00
tegra20_timer.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
time-armada-370-xp.c cpu/hotplug: Cleanup state names 2016-12-25 10:47:44 +01:00
time-efm32.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
time-lpc32xx.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
time-orion.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
time-pistachio.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
timer-atlas7.c Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-25 14:30:04 -08:00
timer-atmel-pit.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
timer-atmel-st.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
timer-digicolor.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
timer-gemini.c clocksource/drivers/gemini: Add driver for the Cortina Gemini 2017-02-07 20:58:30 +01:00
timer-imx-gpt.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
timer-integrator-ap.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
timer-keystone.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
timer-nps.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
timer-oxnas-rps.c clocksource/drivers/oxnas: Add OX820 compatible 2016-09-12 07:28:46 +02:00
timer-prima2.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
timer-sp.h ARM: 8366/1: move Dual-Timer SP804 driver to drivers/clocksource 2015-06-02 09:58:18 +01:00
timer-sp804.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
timer-stm32.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
timer-sun5i.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
timer-ti-32k.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
timer-u300.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
versatile.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
vf_pit_timer.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00
vt8500_timer.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
zevio-timer.c clocksources: Switch back to the clksrc table 2016-06-28 10:19:35 +02:00