i.MX ProcessorsのトピックIMX6ULL Linux 5.15 - EPIT

IMX6ULL Linux 5.15 - EPIT

Jeroen_H — Fri, 29 Mar 2024 08:27:14 GMT

Hi,

I'm using an iMX6ULL and trying to use the EPIT timer as a timersource for my application.

All I can find in the NXP Linux manuals is this:

But, this file doesn't exist in the kernel source tree, so I'm not sure how to use this.

So, basically I'm looking for some hints, examples or starting points to use the EPIT timer in Linux 5.15.

Thanks!

Jeroen.

Re: IMX6ULL Linux 5.15 - EPIT

joanxie — Fri, 29 Mar 2024 10:08:04 GMT

pls check the mail I sent to you for reference

Re: IMX6ULL Linux 5.15 - EPIT

Jeroen_H — Tue, 02 Apr 2024 06:53:37 GMT

Hi Joanxie,

Thank you!
I've updated the patch for 5.15.x, and can confirm the timer is running and generates interrupts.

It’s still a bit unclear how proceed from that point on to use the timer from a userspace application, like setting the timeout interval and receiving an interrupt with e.g. a select()-call.

Do you perhaps also have a small example of that?

Thanks again,

Jeroen.

Re: IMX6ULL Linux 5.15 - EPIT

Jeroen_H — Thu, 04 Apr 2024 16:30:06 GMT

Already succeeded using EPIT in userland.

Example not necessary anymore.