Re: Delays, clocks, timers, hrtimers, etc

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


On 02/06/15 18:21, Mason wrote:
> config HAVE_ARM_TWD
>   bool
>   depends on SMP
>   select CLKSRC_OF if OF
>   help
>     This options enables support for the ARM timer and watchdog unit
> One problem I see is that HAVE_ARM_TWD depends on SMP...
> One of the systems I want to support is UP (single-core Cortex A9).
> Does that mean I should use an SMP kernel even for that system?
> Or is there a different subsystem for UP systems?

I don't see any problem with the TWD dropping the dependency on SMP. The
code should work the same on a UP configuration and if that's the only
timer you have that can deliver interrupts to your processor then it
would be required. You'd still need a clocksource though, which the TWD
doesn't provide.

Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

To unsubscribe from this list: send the line "unsubscribe cpufreq" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at

[Index of Archives]     [Linux Kernel Devel]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Forum]     [Linux SCSI]

  Powered by Linux