linux-kernel - Re: [PATCH v6 2/2] arm64: dts: qcom: ipq5424: Enable PCIe PHYs and controllers

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Message-ID: <CAO9ioeVTyWL0-vzzNs3isDodi8jXQ9pHknyyhnWKcb+0tyf1FQ@mail.gmail.com>
Date: Thu, 3 Apr 2025 12:32:23 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
Cc: andersson@...nel.org, konradybcio@...nel.org, robh@...nel.org,
        krzk+dt@...nel.org, conor+dt@...nel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        quic_varada@...cinc.com, quic_srichara@...cinc.com
Subject: Re: [PATCH v6 2/2] arm64: dts: qcom: ipq5424: Enable PCIe PHYs and controllers

On Thu, 3 Apr 2025 at 08:08, Manikanta Mylavarapu
<quic_mmanikan@...cinc.com> wrote:
>
>
>
> On 4/2/2025 7:50 PM, Dmitry Baryshkov wrote:
> > On Wed, Apr 02, 2025 at 03:57:23PM +0530, Manikanta Mylavarapu wrote:
> >> Enable the PCIe controller and PHY nodes corresponding to RDP466.
> >>
> >> Signed-off-by: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
> >> ---
> >> Changes in V6:
> >>      - No change.
> >>
> >>  arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts | 41 ++++++++++++++++++++-
> >>  1 file changed, 40 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts b/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
> >> index 0fd0ebe0251d..1f89530cb035 100644
> >> --- a/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
> >> +++ b/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
> >> @@ -82,6 +82,32 @@ &dwc_1 {
> >>      dr_mode = "host";
> >>  };
> >>
> >> +&pcie2 {
> >> +    pinctrl-0 = <&pcie2_default_state>;
> >> +    pinctrl-names = "default";
> >> +
> >> +    perst-gpios = <&tlmm 31 GPIO_ACTIVE_LOW>;
> >
> >
> > No wake-gpios? Please document it in the commit message.
> >
>
> Hi Dmitry,
>
> Thank you for reviewing the patch.
>
> The wake GPIO is dropped because the PCIe on the IPQ5424 doesn't support low power mode.
> I will document this information in the commit message and post the next version.

If the GPIO is routed on the PCB I think it should still be described in the DT.


-- 
With best wishes
Dmitry