linux-kernel - Re: [PATCH v3 2/2] arm64: dts: qcom: ipq6018: enable sdhci node

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Date: Sat,  3 Feb 2024 15:00:08 +0800
From: Chukun Pan <amadeus@....edu.cn>
To: andersson@...nel.org
Cc: amadeus@....edu.cn,
	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 v3 2/2] arm64: dts: qcom: ipq6018: enable sdhci node

Hi, Bjorn
> That sounds good, but do we have any one of those boards that should
> reference &ipq6018_l2? Could make plug it into the sdhci node on some
> board?

Actually I have an ipq6010 sdcard device with pmic, which needs to
reference ipq6018_l2. Also on the downstream qsdk kernel, the sdhc
node writes 'vqmmc-supply = <&ipq6018_l2>;' by default.

> Essentially, why is it needed upstream, when there are no user?

Most ipq60xx devices have pmic chips, including some ipq6000 devices,
while another ipq6000 devices do not have the pmic chips. So it does not
mean there are no users but the supply is board specific. Maybe we should
move the mp5496 node outside of ipq6018.dtsi.

Thanks,
Chukun

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