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([2401:e180:8832:3ee7:cbb8:f1fb:c6e2:ba18]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-396b1ac3cbbsm20142625a91.17.2026.08.31.01.44.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 31 Aug 2026 01:44:16 -0700 (PDT) From: Ian Lin To: Johan Hovold Cc: Greg Kroah-Hartman , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Ian Lin Subject: [PATCH v3] USB: serial: option: add Compal EXM-G1x support Date: Mon, 31 Aug 2026 16:44:05 +0800 Message-ID: <20260831084405.65506-1-jisayme@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- v3: - base on usb-next - add AI assistance attribution - post as a fresh thread v2: https://lore.kernel.org/20260828082645.13018-1-jisayme@gmail.com/ - split USB serial support into a separate patch - identify the Qualcomm SDX12 chipset and include usb-devices output - keep the device entries sorted and add the product name v1: https://lore.kernel.org/20260828075644.6228-1-jisayme@gmail.com/ drivers/usb/serial/option.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c index fd8f96294..8713f8b93 100644 --- a/drivers/usb/serial/option.c +++ b/drivers/usb/serial/option.c @@ -2541,6 +2541,9 @@ static const struct usb_device_id option_ids[] = { { USB_DEVICE_AND_INTERFACE_INFO(UNISOC_VENDOR_ID, TOZED_PRODUCT_LT70C, 0xff, 0, 0) }, { USB_DEVICE_AND_INTERFACE_INFO(UNISOC_VENDOR_ID, UNISOC_PRODUCT_UIS7720, 0xff, 0, 0) }, { USB_DEVICE_AND_INTERFACE_INFO(UNISOC_VENDOR_ID, LUAT_PRODUCT_AIR720U, 0xff, 0, 0) }, + { USB_DEVICE_AND_INTERFACE_INFO(0x04b7, 0x8217, 0xff, 0xff, 0x30) }, /* Compal EXM-G1x */ + { USB_DEVICE_AND_INTERFACE_INFO(0x04b7, 0x8217, 0xff, 0xff, 0x40) }, + { USB_DEVICE_AND_INTERFACE_INFO(0x04b7, 0x8217, 0xff, 0xff, 0x60) }, { USB_DEVICE_INTERFACE_CLASS(0x1bbb, 0x0530, 0xff), /* TCL IK512 MBIM */ .driver_info = NCTRL(1) }, { USB_DEVICE_INTERFACE_CLASS(0x1bbb, 0x0640, 0xff), /* TCL IK512 ECM */ base-commit: 15734de99517b0c81a1a5a3bccaff4593ef8d953 -- 2.43.0