Interrupt setup in devicetree overlay for I2C device - nrf5340

RE: Interrupt setup in devicetree overlay for I2C device - nrf5340

frax84 — Wed, 10 May 2023 13:28:34 GMT

Hi Sigurd,

Thank you for your feedback and the useful link. I'll post my solution when is done for the community, but it will take a bit. In the meantime I'll mark the post as solved.

Thx

Frax

RE: Interrupt setup in devicetree overlay for I2C device - nrf5340

Sigurd Hellesvik — Wed, 10 May 2023 13:11:02 GMT

[quote user=""]I'm developing a library (in the "src" folder of the project) for a I2C sensor.[/quote]

So since your library just use the I2C driver, you do not need to do a fancy out of tree module thing, as you pointed out.

[quote user="frax84"]1) use gpio bindings (like in the sample for button interrupt) and use them in code with gpio apis. In this case everything is already available out of the box, but i have to map separately the i2c device and its interrupt pin.[/quote]

This for sure sounds like the easiest solution to implement.

[quote user="frax84"]2) write a custom yaml file for the i2c device i'm working on add a field for interrupt parameters on it, use the "compatible" property in the DTS overlay and use these in code with gpio apis. In this case i need to write an additional file (the custom yaml) but the result is more compact and maintanable.[/quote]

Yes, this would make sense to me. Requires more work, but is more elegant than 1).

See this unofficial sample on how you can add a this yaml file.

Regards,
Sigurd Hellesvik

RE: Interrupt setup in devicetree overlay for I2C device - nrf5340

Sigurd Hellesvik — Tue, 09 May 2023 14:18:40 GMT

From a scan of you answer, I see that I indeed misunderstood your question.

I will look over your statement tomorrow and let you know if it is correct or not.

Regards,
Sigurd Hellesvik

RE: Interrupt setup in devicetree overlay for I2C device - nrf5340

frax84 — Tue, 09 May 2023 10:30:47 GMT

Hello,

thank you for the link! I'm not sure this fits with my request. I already read some (unofficial) guide to OOT drivers and i don't plan to write one at the moment. By the way i'll read it a bit more. In the meantime i even looked for more material. If i understood correctly the material i have been able to find until now i have two options to implement interrupt configuration in bindings:

1) use gpio bindings (like in the sample for button interrupt) and use them in code with gpio apis. In this case everything is already available out of the box, but i have to map separately the i2c device and its interrupt pin.

2) write a custom yaml file for the i2c device i'm working on add a field for interrupt parameters on it, use the "compatible" property in the DTS overlay and use these in code with gpio apis. In this case i need to write an additional file (the custom yaml) but the result is more compact and maintanable.

Am i correct?

I'm sorry if my vocabulary can be still a bit naive, but this is the best way i can explain it at the moment.

Thank you,

Frax

RE: Interrupt setup in devicetree overlay for I2C device - nrf5340

Sigurd Hellesvik — Mon, 08 May 2023 09:15:56 GMT

Hi,

Have a look at Creating an out-of-tree zephyr driver with bindings... and see if you can learn what you need from this case.

Regards,
Sigurd Hellesvik