How to configure device tree and defconfig for using USB device?

[sunyeong]

Hi,

I'm using an Agilex 5E Premium Development kit board.

I'm trying to communicate with my PC via USB, and I'm planning to use this device as a device(gadget).
Can you tell me how to configure defconfig, device tree, etc. for this?

Regards,

Jung.

[Jeet14]

Hi,

Please refer the device tree changes for Agilex-5 and for USB.

https://github.com/altera-opensource/linux-socfpga/blob/socfpga-6.6.22-lts/arch/arm64/boot/dts/intel/socfpga_agilex5_socdk.dts

Regards

Tiwari

[sunyeong]

Hi, Jeet14.

Thanks for comment.

As I know, some configuration needs for using Gadget Serial feature like below url.

https://www.rocketboards.org/foswiki/Documentation/REFLEXCESAchillesArria10SoCSOM

Can I use the usb-gadget.cfg mentioned in this document as Agilex5 kernel configuration?

In device tree, the "dr_mode" property in usb node have to be added as I know.

This property can be configured as "peripheral", "otg", or "host".

Which value shoud I use?

Regards,

Jung.

[Jeet14]

Hi,

You need to use the dr_mode as "host".

I believe you are using the board USB as Host through which you are connecting the USB devices.

Regards

Tiwari

[sunyeong]

Hi,

I think that there is some miss commnunication.

I said that I want to use the Developlment Kit as a gadget(device).

And I will use My PC as a HOST.

(FYI, In USB communication, there is a host/gadget concept.

It is concept like between master/slave.)

So, setting up a development board to act as a host seems a little different than what I'm asking for.

Regards,

Jung.

[Jeet14]

Hi,

Apologies for delayed response.

Then you need to use the "peripheral" mode, as the PC will be the host.

Regards

Tiwari