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android_kernel_xiaomi_sm8450/drivers/clocksource
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Samuel Holland 5a5ebf5d48 clocksource/arm_arch_timer: Improve Allwinner A64 timer workaround 
commit 8b33dfe0ba1c84c1aab2456590b38195837f1e6e upstream.

Bad counter reads are experienced sometimes when bit 10 or greater rolls
over. Originally, testing showed that at least 10 lower bits would be
set to the same value during these bad reads. However, some users still
reported time skips.

Wider testing revealed that on some chips, occasionally only the lowest
9 bits would read as the anomalous value. During these reads (which
still happen only when bit 10), bit 9 would read as the correct value.

Reduce the mask by one bit to cover these cases as well.

Cc: stable@vger.kernel.org
Fixes: c950ca8c35 ("clocksource/drivers/arch_timer: Workaround for Allwinner A64 timer instability")
Reported-by: Roman Stratiienko <r.stratiienko@gmail.com>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210515021439.55316-1-samuel@sholland.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-07-19 09:44:59 +02:00
..
acpi_pm.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 243 2019-06-19 17:09:07 +02:00
arc_timer.c clocksource/drivers/arc_timer: Remove duplicate error message 2020-05-22 23:58:56 +02:00
arm_arch_timer.c clocksource/arm_arch_timer: Improve Allwinner A64 timer workaround 2021-07-19 09:44:59 +02:00
arm_global_timer.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
armv7m_systick.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
asm9260_timer.c clocksource/drivers/asm9260: Add a check for of_clk_get 2019-11-04 10:40:10 +01:00
bcm2835_timer.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
bcm_kona_timer.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
clksrc_st_lpc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
clksrc-dbx500-prcmu.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 197 2019-05-30 11:29:22 -07:00
clps711x-timer.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
dummy_timer.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
dw_apb_timer_of.c clocksource: dw_apb_timer_of: Fix missing clockevent timers 2020-05-23 00:02:59 +02:00
dw_apb_timer.c clocksource: dw_apb_timer: Make CPU-affiliation being optional 2020-05-23 00:02:41 +02:00
em_sti.c clocksource/drivers/em_sti: Fix variable declaration in em_sti_probe 2020-01-16 19:06:57 +01:00
exynos_mct.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
h8300_timer8.c clocksource/drivers/h8300_timer8: Fix wrong return value in h8300_8timer_init() 2020-08-24 13:01:38 +02:00
h8300_timer16.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
h8300_tpu.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hyperv_timer.c hv: clocksource: Add notrace attribute to read_hv_sched_clock_*() functions 2020-09-28 09:04:48 +00:00
i8253.c clockevents/drivers/i8253: Add support for PIT shutdown quirk 2018-11-04 11:04:46 +01:00
ingenic-ost.c clocksource/drivers/ingenic_ost: Fix return value check in ingenic_ost_probe() 2021-05-14 09:50:16 +02:00
ingenic-sysost.c clocksource/drivers/ingenic: Add support for the Ingenic X1000 OST. 2020-07-23 16:58:09 +02:00
ingenic-timer.c clocksource/drivers/ingenic: Fix section mismatch 2020-12-30 11:53:33 +01:00
jcore-pit.c clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLARE 2017-06-14 11:58:45 +02:00
Kconfig clocksource/drivers/ixp4xx: Select TIMER_OF when needed 2021-03-04 11:37:57 +01:00
Makefile clocksource/drivers: Add CLINT timer driver 2020-08-20 10:57:29 -07:00
mips-gic-timer.c clocksource: mips-gic-timer: Mark GIC timer as unstable if ref clock changes 2020-05-23 00:03:16 +02:00
mmio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mps2-timer.c clocksource/drivers/mps2-timer: Use semicolons rather than commas to separate statements 2020-10-01 10:07:26 +02:00
mxs_timer.c clocksource/drivers/mxs_timer: Add missing semicolon when DEBUG is defined 2021-03-04 11:37:57 +01:00
nomadik-mtu.c clocksource/drivers/nomadik-mtu: Handle 32kHz clock 2020-07-23 16:57:43 +02:00
numachip.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
renesas-ostm.c clocksource/drivers/renesas-ostm: Use unique device name instead of ostm 2019-11-04 10:38:46 +01:00
samsung_pwm_timer.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
scx200_hrt.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sh_cmt.c clocksource/drivers/sh_cmt: Use "kHz" for kilohertz 2020-07-23 16:57:43 +02:00
sh_mtu2.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
sh_tmu.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
timer-armada-370-xp.c clocksource/drivers/armada-370-xp: Use semicolons rather than commas to separate statements 2020-10-02 16:27:28 +02:00
timer-atcpit100.c clocksource/drivers: Set clockevent device cpumask to cpu_possible_mask 2018-07-26 11:26:30 +02:00
timer-atlas7.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
timer-atmel-pit.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
timer-atmel-st.c clocksource/drivers/atmel-st: Remove useless 'status' 2020-04-15 10:57:15 +02:00
timer-atmel-tcb.c clocksource/drivers/timer-atmel-tcb: Add sama5d2 support 2020-07-11 18:58:24 +02:00
timer-cadence-ttc.c clocksource/drivers/cadence_ttc: Fix memory leak in ttc_setup_clockevent() 2020-12-30 11:53:32 +01:00
timer-clint.c clocksource: clint: Export clint_time_val for modules 2020-09-29 23:55:27 -07:00
timer-cs5535.c clocksource/drivers/timer-cs5535: Request irq with non-NULL dev_id 2020-03-12 19:23:06 +01:00
timer-davinci.c clocksource: davinci: axe a pointless __GFP_NOFAIL 2020-04-09 12:13:20 +02:00
timer-digicolor.c clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLARE 2017-06-14 11:58:45 +02:00
timer-efm32.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
timer-fsl-ftm.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
timer-fttmr010.c clocksource/drivers/fttmr010: Set interrupt and shutdown 2020-02-21 09:28:38 +01:00
timer-gx6605s.c clocksource/drivers/timer-gx6605s: Fixup counter reload 2020-08-24 13:01:39 +02:00
timer-imx-gpt.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
timer-imx-sysctr.c clocksource/drivers/imx-sysctr: Remove unused includes 2020-03-17 10:11:45 +01:00
timer-imx-tpm.c clocksource/drivers/imx-tpm: Add support for ARM64 2020-04-09 16:24:50 +02:00
timer-integrator-ap.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
timer-ixp4xx.c clocksource/drivers/ixp4xx: Implement delay timer 2019-06-25 19:49:18 +02:00
timer-keystone.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
timer-lpc32xx.c clocksource/drivers: Unify the names to timer-* format 2018-10-03 14:37:02 +02:00
timer-mediatek.c clocksource/drivers/mediatek: Fix error handling 2019-10-16 17:04:50 +02:00
timer-meson6.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
timer-microchip-pit64b.c clocksource/drivers/timer-microchip-pit64b: Fix rate for gck 2020-03-16 11:19:37 +01:00
timer-milbeaut.c clocksource/drivers/timer-milbeaut: Cleanup common register accesses 2019-05-02 21:55:58 +02:00
timer-mp-csky.c clocksource/drivers/c-sky: fixup ftrace call-graph panic 2018-12-31 23:17:23 +08:00
timer-npcm7xx.c clocksource/drivers/npcm: Fix GENMASK and timer operation 2019-08-27 00:31:39 +02:00
timer-nps.c clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLARE 2017-06-14 11:58:45 +02:00
timer-of.c - Some cleanups for the timer-of, use %p0F and the unique device name 2019-11-04 18:49:13 +01:00
timer-of.h clocksource/drivers/timer-of: Store the device node pointer in 'struct timer_of' 2018-01-08 17:57:24 +01:00
timer-orion.c clocksource/drivers/orion: Add missing clk_disable_unprepare() on error path 2020-12-30 11:53:32 +01:00
timer-owl.c clocksource/drivers/owl: Improve owl_timer_init fail messages 2020-02-27 09:42:00 +01:00
timer-oxnas-rps.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201 2019-05-30 11:29:52 -07:00
timer-pistachio.c clocksource/drivers: Unify the names to timer-* format 2018-10-03 14:37:02 +02:00
timer-prima2.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
timer-probe.c treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
timer-pxa.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
timer-qcom.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
timer-rda.c clocksource/drivers/rda: Add clock driver for RDA8810PL SoC 2018-12-18 22:22:23 +01:00
timer-riscv.c RISC-V: Remove CLINT related code from timer and arch 2020-08-20 10:58:13 -07:00
timer-rockchip.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
timer-sp804.c clocksource/drivers/sp804: Enable Hisilicon sp804 timer 64bit mode 2020-09-24 10:51:04 +02:00
timer-sp.h clocksource/drivers/sp804: Enable Hisilicon sp804 timer 64bit mode 2020-09-24 10:51:04 +02:00
timer-sprd.c clocksource/drivers/sprd: Register one always-on timer to compensate suspend time 2018-07-26 11:26:34 +02:00
timer-stm32-lp.c clocksource: Add Low Power STM32 timers driver 2020-06-18 11:19:58 +01:00
timer-stm32.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
timer-sun4i.c clocksource: sun4i: Add missing compatibles 2019-08-27 00:31:39 +02:00
timer-sun5i.c clocksource/drivers/sun5i: Fail gracefully when clock rate is unavailable 2019-02-23 12:13:45 +01:00
timer-tango-xtal.c clocksource/drivers/tango-xtal: Rename the file for consistency 2019-02-23 12:13:45 +01:00
timer-tegra.c clocksource/drivers/tegra: Set up maximum-ticks limit properly 2019-06-25 19:49:18 +02:00
timer-ti-32k.c clocksource/drivers: Replace HTTP links with HTTPS ones 2020-07-23 16:57:43 +02:00
timer-ti-dm-systimer.c clocksource/drivers/timer-ti-dm: Handle dra7 timer wrap errata i940 2021-05-19 10:13:18 +02:00
timer-ti-dm.c clocksource/drivers/timer-ti-dm: Save and restore timer TIOCP_CFG 2021-07-14 16:56:12 +02:00
timer-u300.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
timer-versatile.c clocksource/drivers/timer-versatile: Clear OF_POPULATED flag 2020-05-23 00:03:25 +02:00
timer-vf-pit.c clocksource/drivers/timer-vf-pit: Add missing parenthesis 2020-04-05 09:24:58 +02:00
timer-vt8500.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00
timer-zevio.c clocksource: Replace setup_irq() by request_irq() 2020-02-27 12:15:24 +01:00