From: Johan Hovold <johan+linaro@kernel.org>
To: Lorenzo Pieralisi <lpieralisi@kernel.org>, stanimir.k.varbanov@gmail.com
Cc: "Andy Gross" <agross@kernel.org>,
"Bjorn Andersson" <andersson@kernel.org>,
"Konrad Dybcio" <konrad.dybcio@somainline.org>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Rob Herring" <robh+dt@kernel.org>,
"Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Brian Masney" <bmasney@redhat.com>,
"Manivannan Sadhasivam" <mani@kernel.org>,
linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
"Johan Hovold" <johan+linaro@kernel.org>
Subject: [PATCH v3 0/2] PCI: qcom: Add basic interconnect support
Date: Wed, 2 Nov 2022 10:07:03 +0100 [thread overview]
Message-ID: <20221102090705.23634-1-johan+linaro@kernel.org> (raw)
On Qualcomm platforms like SC8280XP and SA8540P interconnect bandwidth
must be requested before enabling interconnect clocks.
Add basic support for managing an optional "pcie-mem" interconnect path
by setting a low constraint before enabling clocks and updating it after
the link is up.
This is specifically needed to prevent a crash on SC8280XP/SA8540P when
the interconnect constraints are enforced during boot.
As support for these platforms was added in 6.1-rc1 it would be nice to
have this merged as a fix for 6.1, but deferring for 6.2 works as well.
Johan
Changes in v3
- remove intermediate assignment in error path (Mani)
- add WARN_ON_ONCE() as a reminder to anyone ever extending the
driver with support for higher speeds to update the bandwidth table
Changes in v2
- update the bindings so that the interconnect-names constraints apply
to all platforms (Krzysztof)
Johan Hovold (2):
dt-bindings: PCI: qcom: Add SC8280XP/SA8540P interconnects
PCI: qcom: Add basic interconnect support
.../devicetree/bindings/pci/qcom,pcie.yaml | 20 +++++
drivers/pci/controller/dwc/pcie-qcom.c | 76 +++++++++++++++++++
2 files changed, 96 insertions(+)
--
2.37.3
next reply other threads:[~2022-11-02 9:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-02 9:07 Johan Hovold [this message]
2022-11-02 9:07 ` [PATCH v3 1/2] dt-bindings: PCI: qcom: Add SC8280XP/SA8540P interconnects Johan Hovold
2022-11-02 9:07 ` [PATCH v3 2/2] PCI: qcom: Add basic interconnect support Johan Hovold
2022-11-03 12:34 ` Manivannan Sadhasivam
2022-11-11 11:05 ` [PATCH v3 0/2] " Lorenzo Pieralisi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20221102090705.23634-1-johan+linaro@kernel.org \
--to=johan+linaro@kernel.org \
--cc=agross@kernel.org \
--cc=andersson@kernel.org \
--cc=bhelgaas@google.com \
--cc=bmasney@redhat.com \
--cc=devicetree@vger.kernel.org \
--cc=konrad.dybcio@somainline.org \
--cc=krzysztof.kozlowski+dt@linaro.org \
--cc=kw@linux.com \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=lpieralisi@kernel.org \
--cc=mani@kernel.org \
--cc=robh+dt@kernel.org \
--cc=stanimir.k.varbanov@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).