linux-kernel - Re: [PATCH v4 02/10] arm64: dts: qcom: qcs6490-rb3gen2: Add TC956x PCIe switch node

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Message-ID: <xkjozxbchqi6mhstqctejfk7vmwux4kdff2nyrcu5nxqzxv73z@agb7rbapsvx2>
Date: Wed, 19 Mar 2025 12:21:52 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Krishna Chaitanya Chundru <quic_krichai@...cinc.com>
Cc: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        cros-qcom-dts-watchers@...omium.org, Jingoo Han <jingoohan1@...il.com>,
        Bartosz Golaszewski <brgl@...ev.pl>, quic_vbadigan@...cnic.com,
        amitk@...nel.org, dmitry.baryshkov@...aro.org,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        jorge.ramirez@....qualcomm.com
Subject: Re: [PATCH v4 02/10] arm64: dts: qcom: qcs6490-rb3gen2: Add TC956x
 PCIe switch node

On Wed, Mar 19, 2025 at 03:46:00PM +0530, Krishna Chaitanya Chundru wrote:
> 
> 
> On 3/19/2025 3:43 PM, Dmitry Baryshkov wrote:
> > On Wed, Mar 19, 2025 at 09:14:22AM +0530, Krishna Chaitanya Chundru wrote:
> > > 
> > > 
> > > On 3/18/2025 10:30 PM, Dmitry Baryshkov wrote:
> > > > On Tue, 18 Mar 2025 at 18:11, Krishna Chaitanya Chundru
> > > > <krishna.chundru@....qualcomm.com> wrote:
> > > > > 
> > > > > 
> > > > > 
> > > > > On 3/17/2025 4:57 PM, Dmitry Baryshkov wrote:
> > > > > > On Tue, Feb 25, 2025 at 03:03:59PM +0530, Krishna Chaitanya Chundru wrote:
> > > > > > > Add a node for the TC956x PCIe switch, which has three downstream ports.
> > > > > > > Two embedded Ethernet devices are present on one of the downstream ports.
> > > > > > > 
> > > > > > > Power to the TC956x is supplied through two LDO regulators, controlled by
> > > > > > > two GPIOs, which are added as fixed regulators. Configure the TC956x
> > > > > > > through I2C.
> > > > > > > 
> > > > > > > Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
> > > > > > > Reviewed-by: Bjorn Andersson <andersson@...nel.org>
> > > > > > > Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> > > > > > > ---
> > > > > > >     arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 116 +++++++++++++++++++++++++++
> > > > > > >     arch/arm64/boot/dts/qcom/sc7280.dtsi         |   2 +-
> > > > > > >     2 files changed, 117 insertions(+), 1 deletion(-)
> > > > > > > 
> > > > > > > @@ -735,6 +760,75 @@ &pcie1_phy {
> > > > > > >        status = "okay";
> > > > > > >     };
> > > > > > > 
> > > > > > > +&pcie1_port {
> > > > > > > +    pcie@0,0 {
> > > > > > > +            compatible = "pci1179,0623", "pciclass,0604";
> > > > > > > +            reg = <0x10000 0x0 0x0 0x0 0x0>;
> > > > > > > +            #address-cells = <3>;
> > > > > > > +            #size-cells = <2>;
> > > > > > > +
> > > > > > > +            device_type = "pci";
> > > > > > > +            ranges;
> > > > > > > +            bus-range = <0x2 0xff>;
> > > > > > > +
> > > > > > > +            vddc-supply = <&vdd_ntn_0p9>;
> > > > > > > +            vdd18-supply = <&vdd_ntn_1p8>;
> > > > > > > +            vdd09-supply = <&vdd_ntn_0p9>;
> > > > > > > +            vddio1-supply = <&vdd_ntn_1p8>;
> > > > > > > +            vddio2-supply = <&vdd_ntn_1p8>;
> > > > > > > +            vddio18-supply = <&vdd_ntn_1p8>;
> > > > > > > +
> > > > > > > +            i2c-parent = <&i2c0 0x77>;
> > > > > > > +
> > > > > > > +            reset-gpios = <&pm8350c_gpios 1 GPIO_ACTIVE_LOW>;
> > > > > > > +
> > > > > > 
> > > > > > I think I've responded here, but I'm not sure where the message went:
> > > > > > please add pinctrl entry for this pin.
> > > > > > 
> > > > > Do we need to also add pinctrl property for this node and refer the
> > > > > pinctrl entry for this pin?
> > > > 
> > > > I think that is what I've asked for, was that not?
> > > Currently there is no pincntrl property defined for this.
> > 
> > Does it need to be defined separately / specially?
> > 
> yes we need to define this property now.

Could you please point out existing schema files defining those
properties?

-- 
With best wishes
Dmitry