linux-kernel - Re: [PATCH v4 2/2] arm64: dts: qcom: ipq5424: Enable PCIe PHYs and controllers

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Message-ID: <57601672-2f97-4bf4-a258-4cb12ee45abc@quicinc.com>
Date: Fri, 14 Feb 2025 15:42:50 +0530
From: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
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_srichara@...cinc.com>,
        <quic_varada@...cinc.com>
Subject: Re: [PATCH v4 2/2] arm64: dts: qcom: ipq5424: Enable PCIe PHYs and
 controllers



On 2/13/2025 6:47 PM, Dmitry Baryshkov wrote:
> On Thu, Feb 13, 2025 at 12:49:12PM +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 V4:
>> 	- Added a new line before status in pcie2 and pcie3 nodes.
>> 	- Dropped 'output-low' property from pcie2-default-state and
>> 	  pcie3-default-state nodes.
>>
>>  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 b6e4bb3328b3..e73f61266012 100644
>> --- a/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
>> +++ b/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
>> @@ -53,6 +53,32 @@ &dwc_1 {
>>  	dr_mode = "host";
>>  };
>>  
>> +&pcie2 {
>> +	pinctrl-0 = <&pcie2_default_state>;
>> +	pinctrl-names = "default";
>> +
>> +	perst-gpios = <&tlmm 31 GPIO_ACTIVE_LOW>;
> 
> Don't you also need wake-gpios? Here and in pcie3.
> 

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.

Thanks & Regards,
Manikanta.