USB: serial: option: add Compal EXM-G1x support

Browse source

The Compal EXM-G1x is a Qualcomm SDX12-based LTE modem. Add support for
its vendor-specific serial interfaces with protocols 0x30, 0x40, and
0x60.

Relevant output from usb-devices:

T:  Bus=04 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  4 Spd=5000 MxCh= 0
D:  Ver= 3.20 Cls=ef(misc ) Sub=02 Prot=01 MxPS= 9 #Cfgs=  1
P:  Vendor=04b7 ProdID=8217 Rev=05.04
S:  Manufacturer=COMPAL
S:  Product=EXM-G1x
C:  #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=896mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=30 Driver=option
I:  If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=42 Prot=01 Driver=(none)
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=60 Driver=option
I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=40 Driver=option
I:  If#= 4 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
I:  If#= 8 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=50 Driver=qmi_wwan

Tested on a Compal EXM-G1x modem.

Assisted-by: Codex:GPT-5
Signed-off-by: Ian Lin <jisayme@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <johan@kernel.org>

...

This commit is contained in:

Ian Lin 2026-08-31 16:44:05 +08:00 • committed by Johan Hovold

parent 35c950c9ec

commit 7f11480cda

1 changed files with 3 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

3

drivers/usb/serial/option.c

View file