EC21 Drivers for Raspberry Pi CM4, Linux version 5.15.76-v8

Technical Subjects Driver
1

Hi, I have Quectel_LTE5G_Linux_USB_Driver_V1.0.zip, which comes from https://www.quectel.com/download-zone, but this driver seems not fit to kernel 5.15.*-v8

And I also read following links,

So, If there is a driver that fits 5.15.*, can I have it? Thanks.

2

EC21 is supported by the native Linux 5.15 driver(s).

3

Thanks for your quick reply.

EC21 is supported by the native Linux 5.15 driver(s).

Is that mean both of following native supports EC21?,

  • usb/serial/usb_wwan
  • usb/serial/option

And don’t we need qmi_wwan_q.c any more?

4

That’s correct, until you need some specific function available in the Quectel driver.
You may have other options available besides QMI, like ECM and MBIM.

5

So it looks like I have a Linux-specific problem with my raspberry pi cm4 built with buildroot.

I guess I need to investigate further.

I really appreciate your quick response. Thank you very much.

1 Like
6

Finally, I was able to use the EC-21 with a non Raspberry Pi OS, Buildroot Linux.
It was because the value of linux kernel config was different from that of Raspberry Pi OS.

Thanks!