[PATCH 11/11] net: wwan: t9xx: Add maintainers and documentation
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STALE130d
From: Jack Wu via B4 Relay <devnull+jackbb_wu.compal.com@kernel.org>
Date: 2026-05-29 10:31:49
Also in:
b4-sent, linux-arm-kernel, linux-doc, linux-mediatek, lkml
Subsystem:
documentation, networking [general], the rest · Maintainers:
Jonathan Corbet, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Jack Wu <redacted> Adds maintainers and documentation for MediaTek T9XX 5G WWAN modem device driver. Signed-off-by: Jack Wu <redacted> --- .../networking/device_drivers/wwan/t9xx.rst | 48 ++++++++++++++++++++++ MAINTAINERS | 10 +++++ 2 files changed, 58 insertions(+)
diff --git a/Documentation/networking/device_drivers/wwan/t9xx.rst b/Documentation/networking/device_drivers/wwan/t9xx.rst
new file mode 100644
index 000000000000..eaba82f18c1b
--- /dev/null
+++ b/Documentation/networking/device_drivers/wwan/t9xx.rst@@ -0,0 +1,48 @@ +.. SPDX-License-Identifier: GPL-2.0-only + +.. Copyright (c) 2025, MediaTek Inc. + +.. _t9xx_driver_doc: + +==================================================== +T9XX driver for MTK PCIe based T-series 5G Modem +==================================================== +The T9XX driver is a WWAN PCIe host driver developed +for data exchange over PCIe interface between Host platform and MediaTek's +T-series 5G modem. The driver exposes control plane and data plane interfaces +to applications. The control plane provides device node interfaces for control +data transactions. The data plane provides network link interfaces for IP data +transactions. + +Control channel userspace ABI +============================= +/dev/wwan0at0 character device +------------------------------ +The driver exposes an AT port by implementing AT WWAN Port. +The userspace end of the control channel pipe is a /dev/wwan0at0 character +device. Application shall use this interface to issue AT commands. + +/dev/wwan0mbim0 character device +-------------------------------- +The driver exposes an MBIM interface to the MBIM function by implementing +MBIM WWAN Port. The userspace end of the control channel pipe is a +/dev/wwan0mbim0 character device. Applications shall use this interface +for MBIM protocol communication. + +Data channel userspace ABI +========================== +wwan0-X network device +---------------------- +The T9XX driver exposes IP link interfaces "wwan0-X" of type "wwan" for IP +traffic. Iproute network utility is used for creating "wwan0-X" network +interfaces and for associating it with the MBIM IP session. + +The userspace management application is responsible for creating a new IP link +prior to establishing an MBIM IP session where the SessionId is greater than 0. + +For example, creating a new IP link for an MBIM IP session with SessionId 1: + + ip link add dev wwan0-1 parentdev wwan0 type wwan linkid 1 + +The driver will automatically map the "wwan0-1" network device to MBIM IP +session 1.
diff --git a/MAINTAINERS b/MAINTAINERS
index 461a3eed6129..3fab2b47f531 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS@@ -16494,6 +16494,16 @@ L: netdev@vger.kernel.org S: Supported F: drivers/net/wwan/t7xx/ +MEDIATEK T9XX 5G WWAN MODEM DRIVER +M: Jack Wu <jackbb_wu@compal.com> +R: Wen-Zhi Huang <wen-zhi.huang@mediatek.com> +R: Shi-Wei Yeh <shi-wei.yeh@mediatek.com> +R: Minano Tseng <Minano.tseng@mediatek.com> +L: netdev@vger.kernel.org +S: Supported +F: Documentation/networking/device_drivers/wwan/t9xx.rst +F: drivers/net/wwan/t9xx/ + MEDIATEK USB3 DRD IP DRIVER M: Chunfeng Yun <chunfeng.yun@mediatek.com> L: linux-usb@vger.kernel.org
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