How to configure and enable timer or counter in apalis imx8mp

Technical Support
,
1

Hello,
I have used toradex apalis imx8 processor for customize board.
Please let me know how to configure and enable timer or counter in device tree and how to use timer / counter from user space application ?

2

We have never had Apalis imx8mp module. Could you please clarify are you talking about Apalis imx8 or Verdin imx8MP?

3

I have used apalis iMX8QP 2GB [MIMX8QP5AVUFFAB].
Please let me know how to configure and enable timer or counter in device tree and how to use timer / counter from user space application ?
Share me user application to use timer/counter of system if available.

4

"Unfortunately, we don’t have an iMX8 Linux driver for the General Purpose Timer/Counter (GPT). Therefore, I am unable to provide you with examples of device tree configuration or share a user application. You have a few options to consider: you can develop the driver yourself, include a GPT access API in the System Controller firmware, or utilize the M core for these tasks.

For an example of GPT capture, you can refer to the file gpt_capture.c located at …/driver_examples/gpt/capture/ in the M4 SDK_MEK-MIMX8QX, which is available on on Welcome | MCUXpresso SDK Builder

5

Hello,
I found some information related to system Timer Counter for i.MX8 mentioned in i.MX_Reference_Manual_Linux.pdf document section 2.1.3.

How to use this “timer-imx-sysctr.c” driver code api’s ?

6

Hello,

Timer section mentioned in attached screenshot of i.MX_Reference_Manual_Linux.pdf document section 2.1.3.

Timer-Info
Timer-Info1026×685 76.5 KB

7

Hello,
could you please share your thoughts on above query ?

8

My thoughts - the NXP Linux doesn’t use an GPT timer. Other suggestion I listed in my pervious reply.

9

image
image730×873 74.8 KB

10

Hello,
Could you please update on “timer-imx-sysctr.c” query ?

11

The inux/drivers/clocksource/timer-imx-sysctr.c is a kernel space driver, specifically for i.MX system counter timer devices, which are used as a clock source in the Linux kernel. It’s not designed to be used from a user space.

12

Hello,

I followed the above link to use gpt timer but how to use this gpt timer from user-space. Can you please share me the sample application or link to use this gpt timer ?