linux-kernel - Re: [PATCH v2 4/4] arm64: dts: qcom: Add base PURWA-IOT-EVK board

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Message-ID: <d5d1d6c0-87ab-42a8-9816-359a64b9112e@oss.qualcomm.com>
Date: Mon, 12 Jan 2026 13:51:14 +0800
From: Yijie Yang <yijie.yang@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Konrad Dybcio <konrad.dybcio@....qualcomm.com>, andersson@...nel.org,
        konradybcio@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
        conor+dt@...nel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        krzysztof.kozlowski@....qualcomm.com
Subject: Re: [PATCH v2 4/4] arm64: dts: qcom: Add base PURWA-IOT-EVK board



On 1/12/2026 1:00 PM, Dmitry Baryshkov wrote:
> On Mon, Jan 12, 2026 at 11:12:09AM +0800, Yijie Yang wrote:
>>
>>
>> On 1/9/2026 7:29 PM, Konrad Dybcio wrote:
>>> On 1/9/26 8:59 AM, YijieYang wrote:
>>>> From: Yijie Yang <yijie.yang@....qualcomm.com>
>>>>
>>>> The PURWA-IOT-EVK is an evaluation platform for IoT products, composed of
>>>> the Purwa IoT SoM and a carrier board. Together, they form a complete
>>>> embedded system capable of booting to UART.
>>>
>>> [...]
>>>
>>>> -	backlight: backlight {
>>>> -		compatible = "pwm-backlight";
>>>> -		pwms = <&pmk8550_pwm 0 5000000>;
>>>> -		enable-gpios = <&pmc8380_3_gpios 4 GPIO_ACTIVE_HIGH>;
>>>> -		power-supply = <&vreg_edp_bl>;
>>>> -
>>>> -		pinctrl-0 = <&edp_bl_en>, <&edp_bl_pwm>;
>>>> -		pinctrl-names = "default";
>>>> -	};
>>>
>>> Is the backlight infra different on the Purwa IoT EVK?
>>
>> As you can see, this Purwa file was copied from the latest
>> hamoa-iot-evk.dts. However, not all nodes have been verified on Purwa.
>> Therefore, I need to retain only the functions that work correctly and keep
>> them aligned with the nodes from my initial version. The deleted nodes will
>> be updated later by the respective authors from different technical areas.
> 
> Please, only delete nodes which are not present on the Purwa IoT EVK.

This isn’t a deletion—it’s just not ready yet. Why do we need to include 
all the nodes like a mature Hamoa platform in the initial push?

> 
>>
>>>
>>>> -
>>>>    	wcd938x: audio-codec {
>>>>    		compatible = "qcom,wcd9385-codec";
>>>> @@ -60,32 +50,6 @@ chosen {
>>>>    		stdout-path = "serial0:115200n8";
>>>>    	};
>>>> -	connector3 {
>>>> -		compatible = "usb-a-connector";
>>>> -		label = "USB-3-Type-A";
>>>> -		power-role = "source";
>>>> -
>>>> -		vbus-supply = <&regulator_usb3_vbus>;
>>>> -
>>>> -		port {
>>>> -			connector_3_in: endpoint {
>>>> -			};
>>>> -		};
>>>> -	};
>>>> -
>>>> -	connector6 {
>>>> -		compatible = "usb-a-connector";
>>>> -		label = "USB-6-Type-A";
>>>> -		power-role = "source";
>>>> -
>>>> -		vbus-supply = <&regulator_usb6_vbus>;
>>>> -
>>>> -		port {
>>>> -			connector_4_in: endpoint {
>>>> -			};
>>>> -		};
>>>> -	};
>>>
>>> Are there no Type-A ports?
>>
>> ditto
> 
> ?
> 
>>
>>>> @@ -920,23 +886,6 @@ &mdss_dp3_phy {
>>>>    	status = "okay";
>>>>    };
>>>> -&pcie4_port0 {
>>>> -	wifi@0 {
>>>> -		compatible = "pci17cb,1107";
>>>> -		reg = <0x10000 0x0 0x0 0x0 0x0>;
>>>> -
>>>> -		vddaon-supply = <&vreg_pmu_aon_0p59>;
>>>> -		vddwlcx-supply = <&vreg_pmu_wlcx_0p8>;
>>>> -		vddwlmx-supply = <&vreg_pmu_wlmx_0p85>;
>>>> -		vddrfacmn-supply = <&vreg_pmu_rfa_cmn>;
>>>> -		vddrfa0p8-supply = <&vreg_pmu_rfa_0p8>;
>>>> -		vddrfa1p2-supply = <&vreg_pmu_rfa_1p2>;
>>>> -		vddrfa1p8-supply = <&vreg_pmu_rfa_1p8>;
>>>> -		vddpcie0p9-supply = <&vreg_pmu_pcie_0p9>;
>>>> -		vddpcie1p8-supply = <&vreg_pmu_pcie_1p8>;
>>>> -	};
>>>> -};
>>>
>>> Is the Wi-Fi solution different?
>>
>> ditto
> 
> NAK
> 

-- 
Best Regards,
Yijie