[PATCH] clocksource/drivers/timer-ti-dm: Do reset before enable

Daniel Lezcano daniel.lezcano at linaro.org
Mon Aug 24 07:00:59 EDT 2020


On 17/08/2020 11:24, Tony Lindgren wrote:
> Commit 6cfcd5563b4f ("clocksource/drivers/timer-ti-dm: Fix suspend and
> resume for am3 and am4") exposed a new issue for type2 dual mode timers
> on at least omap5 where the clockevent will stop when the SoC starts
> entering idle states during the boot.
> 
> Turns out we are wrongly first enabling the system timer and then
> resetting it, while we must also re-enable it after reset. The current
> sequence leaves the timer module in a partially initialized state. This
> issue went unnoticed earlier with ti-sysc driver reconfiguring the timer
> module until we fixed the issue of ti-sysc reconfiguring system timers.
> 
> Let's fix the issue by calling dmtimer_systimer_enable() from reset for
> both type1 and type2 timers, and switch the order of reset and enable in
> dmtimer_systimer_setup(). Let's also move dmtimer_systimer_enable() and
> dmtimer_systimer_disable() to do this without adding forward declarations.
> 
> Fixes: 6cfcd5563b4f ("clocksource/drivers/timer-ti-dm: Fix suspend and resume for am3 and am4")
> Reported-by: H. Nikolaus Schaller" <hns at goldelico.com>
> Signed-off-by: Tony Lindgren <tony at atomide.com>
> ---

Applied, thanks

-- 
<http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog



More information about the linux-arm-kernel mailing list