linux-kernel - [PATCH net-next 0/3] net: wwan: Add RPMSG WWAN CTRL driver

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Date:   Tue, 15 Jun 2021 15:32:26 +0200
From:   Stephan Gerhold <stephan@...hold.net>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Loic Poulain <loic.poulain@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Aleksander Morgado <aleksander@...ksander.es>,
        Sergey Ryazanov <ryazanov.s.a@...il.com>,
        Johannes Berg <johannes.berg@...el.com>,
        M Chetan Kumar <m.chetan.kumar@...el.com>,
        Ohad Ben-Cohen <ohad@...ery.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        netdev@...r.kernel.org, linux-remoteproc@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, phone-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht,
        Stephan Gerhold <stephan@...hold.net>
Subject: [PATCH net-next 0/3] net: wwan: Add RPMSG WWAN CTRL driver

This patch series adds a WWAN "control" driver for the remote processor
messaging (rpmsg) subsystem. This subsystem allows communicating with
an integrated modem DSP on many Qualcomm SoCs, e.g. MSM8916 or MSM8974.

The driver is a fairly simple glue layer between WWAN and RPMSG
and is mostly based on the existing mhi_wwan_ctrl.c and rpmsg_char.c.

For more information, see commit message in PATCH 2/3.

I already posted a RFC for this a while ago:
https://lore.kernel.org/linux-arm-msm/YLfL9Q+4860uqS8f@gerhold.net/
and now I'm looking for some feedback for the actual changes. :)

Especially patch 3/3 is still up for discussion, perhaps there is a cleaner
way to implement the blocking/non-blocking writes for rpmsg_wwan_ctrl?

Stephan Gerhold (3):
  rpmsg: core: Add driver_data for rpmsg_device_id
  net: wwan: Add RPMSG WWAN CTRL driver
  net: wwan: Allow WWAN drivers to provide blocking tx and poll function

 MAINTAINERS                           |   7 ++
 drivers/net/wwan/Kconfig              |  18 +++
 drivers/net/wwan/Makefile             |   1 +
 drivers/net/wwan/iosm/iosm_ipc_port.c |   3 +-
 drivers/net/wwan/mhi_wwan_ctrl.c      |   3 +-
 drivers/net/wwan/rpmsg_wwan_ctrl.c    | 156 ++++++++++++++++++++++++++
 drivers/net/wwan/wwan_core.c          |   9 +-
 drivers/net/wwan/wwan_hwsim.c         |   3 +-
 drivers/rpmsg/rpmsg_core.c            |   4 +-
 include/linux/mod_devicetable.h       |   1 +
 include/linux/wwan.h                  |  13 ++-
 11 files changed, 207 insertions(+), 11 deletions(-)
 create mode 100644 drivers/net/wwan/rpmsg_wwan_ctrl.c

-- 
2.32.0