Re: [RFC PATCH 5/6] arm64: dts: qcom: add base AIM500 dtsi

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On 20/02/2024 10:11, Jingyi Wang wrote:
> Hi Krzysztof,
> 
> On 2/5/2024 8:35 PM, Krzysztof Kozlowski wrote:
>> On 05/02/2024 12:57, Jingyi Wang wrote:
>>> Introduce aim500 board dtsi.
>>>
>>> AIM500 Series is a highly optimized family of modules designed to
>>> support AIoT and Generative AI applications based on sm8650p with
>>> PMIC and bluetooth functions etc.
>>>
>>> Co-developed-by: Tingwei Zhang <quic_tingweiz@xxxxxxxxxxx>
>>> Signed-off-by: Tingwei Zhang <quic_tingweiz@xxxxxxxxxxx>
>>> Signed-off-by: Jingyi Wang <quic_jingyw@xxxxxxxxxxx>
>>> ---
>>>  arch/arm64/boot/dts/qcom/sm8650p-aim500.dtsi | 409 +++++++++++++++++++
>>>  1 file changed, 409 insertions(+)
>>>  create mode 100644 arch/arm64/boot/dts/qcom/sm8650p-aim500.dtsi
>>>
>>> diff --git a/arch/arm64/boot/dts/qcom/sm8650p-aim500.dtsi b/arch/arm64/boot/dts/qcom/sm8650p-aim500.dtsi
>>> new file mode 100644
>>> index 000000000000..cb857da8653b
>>> --- /dev/null
>>> +++ b/arch/arm64/boot/dts/qcom/sm8650p-aim500.dtsi
>>> @@ -0,0 +1,409 @@
>>> +// SPDX-License-Identifier: BSD-3-Clause
>>> +/*
>>> + * Copyright (c) 2024, Qualcomm Innovation Center, Inc. All rights reserved.
>>> + */
>>> +
>>> +#include <dt-bindings/regulator/qcom,rpmh-regulator.h>
>>> +#include "sm8650p.dtsi"
>>> +#include "pm8550.dtsi"
>>> +#include "pm8550b.dtsi"
>>> +#define PMK8550VE_SID 8
>>> +#include "pm8550ve.dtsi"
>>> +#include "pm8550vs.dtsi"
>>> +#include "pmk8550.dtsi"
>>> +
>>> +/ {
>>> +	aliases {
>>> +		serial1 = &uart14;
>>> +	};
>>> +
>>> +	vph_pwr: vph-pwr-regulator { };
>>
>> What is this? Why is it needed?
>>
>>
>> Best regards,
>> Krzysztof
>>
> vph_pwr is the power supply which differs from board design, it is defined in sm8650p-aim500-aiot.dts,
> and it is used in the sm8650p-aim500.dts for regulator supply, so we leave the node here.

How an empty, unused node is a power supply?

Best regards,
Krzysztof





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