The BAM Data Multiplexer provides access to the network data channels of modems integrated into many older Qualcomm SoCs, e.g. Qualcomm MSM8916 or MSM8974. This series adds a driver that allows using it. All the changes in this patch series are based on a quite complicated driver from Qualcomm [1]. The driver has been used in postmarketOS [2] on various smartphones/tablets based on Qualcomm MSM8916 and MSM8974 for more than a year now with no reported problems. It works out of the box with open-source WWAN userspace such as ModemManager. [1]: https://source.codeaurora.org/quic/la/kernel/msm-3.10/tree/drivers/soc/qcom/bam_dmux.c?h=LA.BR.1.2.9.1-02310-8x16.0 [2]: https://postmarketos.org/ --- Changes in v3: - Clarify DT schema based on discussion - Drop bam_dma/dmaengine patches since they already landed in 5.16 - Rebase on net-next - Simplify cover letter and commit messages Changes in v2: - Rename "qcom,remote-power-collapse" -> "qcom,powered-remotely" - Rebase on net-next and fix conflicts - Rename network interfaces from "rmnet%d" -> "wwan%d" - Fix wrong file name in MAINTAINERS entry Stephan Gerhold (2): dt-bindings: net: Add schema for Qualcomm BAM-DMUX net: wwan: Add Qualcomm BAM-DMUX WWAN network driver .../bindings/net/qcom,bam-dmux.yaml | 92 ++ MAINTAINERS | 8 + drivers/net/wwan/Kconfig | 13 + drivers/net/wwan/Makefile | 1 + drivers/net/wwan/qcom_bam_dmux.c | 907 ++++++++++++++++++ 5 files changed, 1021 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/qcom,bam-dmux.yaml create mode 100644 drivers/net/wwan/qcom_bam_dmux.c -- 2.34.1
