linux-kernel - Re: [PATCH v3 2/3] arm64: dts: qcom: sm8750: Add PCIe PHY and controller node

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <qref5ooh6pl2sznf7iifrbric7hsap63ffbytkizdyrzt6mtqz@q5r27ho2sbq3>
Date: Wed, 8 Oct 2025 22:08:31 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Cc: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>,
        Bjorn Andersson <bjorn.andersson@....qualcomm.com>,
        Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kwilczynski@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        quic_vbadigan@...cinc.com, quic_mrana@...cinc.com
Subject: Re: [PATCH v3 2/3] arm64: dts: qcom: sm8750: Add PCIe PHY and
 controller node

On Wed, Oct 08, 2025 at 11:11:43AM +0200, Konrad Dybcio wrote:
> On 10/8/25 10:00 AM, Konrad Dybcio wrote:
> > On 10/8/25 6:41 AM, Krishna Chaitanya Chundru wrote:
> >>
> >>
> >> On 10/2/2025 5:07 AM, Bjorn Andersson wrote:
> >>> On Tue, Aug 26, 2025 at 04:32:54PM +0530, Krishna Chaitanya Chundru wrote:
> >>>> Add PCIe controller and PHY nodes which supports data rates of 8GT/s
> >>>> and x2 lane.
> >>>>
> >>>
> >>> I tried to boot the upstream kernel (next-20250925 defconfig) on my
> >>> Pakala MTP with latest LA1.0 META and unless I disable &pcie0 the device
> >>> is crashing during boot as PCIe is being probed.
> >>>
> >>> Is this a known problem? Is there any workaround/changes in flight that
> >>> I'm missing?
> >>>
> >> Hi Bjorn,
> >>
> >> we need this fix for the PCIe to work properly. Please try it once.
> >> https://lore.kernel.org/all/20251008-sm8750-v1-1-daeadfcae980@oss.qualcomm.com/
> > 
> > This surely shouldn't cause/fix any issues, no?
> 
> Apparently this is a real fix, because sm8750.dtsi defines the PCIe
> PHY under a port node, while the MTP DT assigns perst-gpios to the RC
> node, which the legacy binding ("everything under the RC node") parsing
> code can't cope with (please mention that in the commit message, Krishna)
> 
> And I couldn't come up with a way to describe "either both are required
> if any is present under the RC node or none are allowed" in yaml

What about:

oneOf:
  - required:
     - foo
     - bar
  - properties:
     foo: false
     bar: false

-- 
With best wishes
Dmitry