From: Johan Hovold <johan+linaro@kernel.org>
To: Stanimir Varbanov <svarbanov@mm-sol.com>,
Lorenzo Pieralisi <lpieralisi@kernel.org>
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>,
"Manivannan Sadhasivam" <mani@kernel.org>,
"Krishna chaitanya chundru" <quic_krichai@quicinc.com>,
quic_vbadigan@quicinc.com, 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 0/2] PCI: qcom: Add basic interconnect support
Date: Mon, 17 Oct 2022 13:24:47 +0200 [thread overview]
Message-ID: <20221017112449.2146-1-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
Johan Hovold (2):
dt-bindings: PCI: qcom: Add SC8280XP/SA8540P interconnects
PCI: qcom: Add basic interconnect support
.../devicetree/bindings/pci/qcom,pcie.yaml | 25 ++++++
drivers/pci/controller/dwc/pcie-qcom.c | 76 +++++++++++++++++++
2 files changed, 101 insertions(+)
--
2.37.3
next reply other threads:[~2022-10-17 11:27 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-17 11:24 Johan Hovold [this message]
2022-10-17 11:24 ` [PATCH 1/2] dt-bindings: PCI: qcom: Add SC8280XP/SA8540P interconnects Johan Hovold
2022-10-19 14:37 ` Krzysztof Kozlowski
2022-10-20 7:57 ` Johan Hovold
2022-10-20 12:29 ` Krzysztof Kozlowski
2022-10-21 6:40 ` Johan Hovold
2022-10-17 11:24 ` [PATCH 2/2] PCI: qcom: Add basic interconnect support Johan Hovold
2022-10-19 14:32 ` Brian Masney
2022-10-19 14:45 ` Johan Hovold
2022-10-20 16:49 ` Brian Masney
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