Re: [PATCH 1/2] clocksource/drivers/timer-ti-dm: Prepare to handle dra7 timer wrap issue
From: Daniel Lezcano <hidden>
Date: 2021-03-22 15:56:31
Also in:
linux-omap, lkml
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> ---
[ ... ]
quoted hunk ↗ jump to hunk
@@ -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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel