linux-kernel - [PATCH v2 0/4] soc: qcom: aoss: Introduce debugfs interface and cleanup things

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Message-ID: <20230811205839.727373-1-quic_bjorande@quicinc.com>
Date:   Fri, 11 Aug 2023 13:58:35 -0700
From:   Bjorn Andersson <quic_bjorande@...cinc.com>
To:     Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Chris Lew <quic_clew@...cinc.com>
CC:     Alex Elder <elder@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>,
        <linux-remoteproc@...r.kernel.org>, Andrew Lunn <andrew@...n.ch>
Subject: [PATCH v2 0/4] soc: qcom: aoss: Introduce debugfs interface and cleanup things

The Always On Processor supports a number useful commands for affecting
system resources during in various debug scenarious. Introduce a debugfs
interface for allowing the debugger/tester to send these commands.

While at it, let's make some improvements to the qmp_send() API.

In v1, Andrew pointed out the fact that this interface could be used to
send proprietary commands from a userspace driver. As debugfs isn't
enabled in the vast majority of shipping devices, this wouldn't be very
useful. In the mantime having this interface present is very useful for
members of the upstream Qualcomm community.

It would be even more user (developer) friendly to expose each of these
knobs as individual debugfs files. But the list of commands and
resources looks to be varying from target to target, so this is still
being investigated. The hope is to perhaps capture a set of common
resources.

Changes since v1:
- Reverse xmas tree in qmp_send() in patch 1
- Correct length check of input data in patch 2

Bjorn Andersson (3):
  soc: qcom: aoss: Move length requirements from caller
  soc: qcom: aoss: Format string in qmp_send()
  soc: qcom: aoss: Tidy up qmp_send() callers

Chris Lew (1):
  soc: qcom: aoss: Add debugfs interface for sending messages

 drivers/net/ipa/ipa_power.c        |  5 +-
 drivers/remoteproc/qcom_q6v5.c     |  8 +--
 drivers/soc/qcom/qcom_aoss.c       | 82 +++++++++++++++++++++---------
 include/linux/soc/qcom/qcom_aoss.h |  4 +-
 4 files changed, 61 insertions(+), 38 deletions(-)

-- 
2.25.1