Messages in this thread | | | Subject | Re: [PATCH 1/2] clocksource/drivers/timer-ti-dm: Prepare to handle dra7 timer wrap issue | From | Daniel Lezcano <> | Date | Mon, 22 Mar 2021 16:55:31 +0100 |
| |
On 04/03/2021 08:37, Tony Lindgren wrote: > There is a timer wrap issue on dra7 for the ARM architected timer. > In a typical clock configuration the timer fails to wrap after 388 days. > > To work around the issue, we need to use timer-ti-dm timers instead. > > Let's prepare for adding support for percpu timers by adding a common > dmtimer_clkevt_init_common() and call it from dmtimer_clockevent_init(). > This patch makes no intentional functional changes. > > Signed-off-by: Tony Lindgren <tony@atomide.com> > ---
[ ... ]
> @@ -575,33 +574,60 @@ static int __init dmtimer_clockevent_init(struct device_node *np) > */ > writel_relaxed(OMAP_TIMER_CTRL_POSTED, t->base + t->ifctrl); > > + if (dev->cpumask == cpu_possible_mask) > + irqflags = IRQF_TIMER; > + else > + irqflags = IRQF_TIMER | IRQF_NOBALANCING;
Can you explain the reasoning behind the test above ?
[ ... ]
-- <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
| |