Messages in this thread | | | Subject | Re: Time: new clocksource | From | Daniel Lezcano <> | Date | Fri, 3 Dec 2021 22:48:08 +0100 |
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Hi Sekhar,
On 03/12/2021 17:50, Muni Sekhar wrote: > Hi All, > > We have a Digital PLL with 64 bit timer counter hardware and the > counter is accessible from the CPU over the PCIe bus. > > Is it possible to add this timer counter hardware as new clocksource > driver? To do this, can someone please point me to the existing > reference source code(or patch) for this task.
You can refer to the drivers located in drivers/clocksource
git annotate on one of the driver can give you the initial commit where recent submissions explain the timer internals.
> Suppose if it is possible to add a new clocksource driver for this > hardware then does any userspace get_timestamp* API would get the time > from this new hardware?
It should if the timer is selected as the clocksource
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