How should I set IR-receiver GPIO on i.MX 8M NANO EVK(8MNANOD4-CPU) ?

[RabbitThief]

Hello,

I read this article. ( How to set IR-receiver GPIO (i.MX8 mini)  )

I'm trying to get IR to work in EVK.

- EVK : 8MNANOD4-CPU

- Linux BSP Version : L5.4.3

I have not been able to solve the same problem as the above article. I tried to search using Google, but it keeps failing.

If you can help with setting up the IR GPIO, please comment.

[RabbitThief]

Thank you, @AldoG 

As you requested, I'll go into more detail.

My final goal has already been asked in this article. (  How should I implement IR enabled on i.MX 8M NANO EVK(8MNANOD4-CPU) ? )

However, since NXP did not provide a reference solution, I am trying to solve it one by one from the beginning.

Therefore, I made the inquiry I wrote down in the main text. 

As in the referenced article, I want to display GPIO1_13 by executing "cat /sys/kernel/debug/gpio".

./tmp/work-shared/imx8mnevk/kernel-source/arch/arm64/boot/dts/freescale/imx8mn-evk.dts

I set as above (of course, I changed all mini-related parts to nano), but there is no result.

Best regards,
RabbitThief.

[AldoG · Accepted solution]

Hello,

Got it, thank you for sharing more information, I have 2 suggestions that you may try.

1 - Try with a more recent BSP, for example with Linux 5.10.35_2.0.0

2 - You may modify as you tried, but you may take as reference the following commit:
https://source.codeaurora.org/external/imx/linux-imx/commit/?h=imx_5.4.47_2.2.0&id=5f0cbb7b9bc83fc43...

Best regards,
Aldo.

[RabbitThief]

@AldoG 

Thanks for your help.

[AldoG]

Hello,

Could you give more details on what did you change?
And what is not working?

If you just need to modify the dtb/dts you may try with dtc tool.
https://git.kernel.org/pub/scm/utils/dtc/dtc.git/plain/Documentation/manual.txt?id=HEAD

Best regards,
Aldo.