linux-kernel - Re: [PATCH 1/1] arm64: dts: qcom: ipq6018: enable sdhci node

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Message-ID: <CAOX2RU4d5FbtTuNW6OWXaoB7M-YH7xtTbkot9_mLy29qrG=QKg@mail.gmail.com>
Date: Wed, 10 Jan 2024 09:29:24 +0100
From: Robert Marko <robimarko@...il.com>
To: Chukun Pan <amadeus@....edu.cn>
Cc: andersson@...nel.org, conor+dt@...nel.org, devicetree@...r.kernel.org, 
	konrad.dybcio@...aro.org, krzysztof.kozlowski+dt@...aro.org, 
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	robh+dt@...nel.org
Subject: Re: [PATCH 1/1] arm64: dts: qcom: ipq6018: enable sdhci node

On Wed, 10 Jan 2024 at 03:31, Chukun Pan <amadeus@....edu.cn> wrote:
>
> Hi, Robert
> > L2 LDO should be used as VQMMC supply, otherwise you cannot change
> > between 3 and 1.8V.
>
> Some ipq6000 devices do not have pmic chips, resulting in l2 being
> unavailable. So vqmmc-supply should be configured in the dts of the
> device.

Yes, but you need to at least register it in the RPM regulator node so
that they can easily reference it in the device DTS.

Regards,
Robert
>
> Thanks,
> Chukun
>
> --
> 2.25.1
>