linux-kernel - Re: [PATCH 3/3] arm64: dts: qcom: x1e80100-qcp: Add WiFi/BT pwrseq

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Message-ID: <f125c7d5-5f85-4ff6-999b-2098ff3103f9@sirena.org.uk>
Date: Thu, 17 Oct 2024 14:22:01 +0100
From: Mark Brown <broonie@...nel.org>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Stephan Gerhold <stephan.gerhold@...aro.org>,
	Johan Hovold <johan@...nel.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Abel Vesa <abel.vesa@...aro.org>,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: Re: [PATCH 3/3] arm64: dts: qcom: x1e80100-qcp: Add WiFi/BT pwrseq

On Thu, Oct 17, 2024 at 02:21:08PM +0200, Bartosz Golaszewski wrote:

> A device is wired differently on different platforms. It requests a
> bunch of supplies using devm_regulator_bulk_get(). One of them is
> unconnected on one of the platforms resulting in the "using dummy
> regulator" warning.

> Concrete use-case is: make all but one regulator mandatory when
> calling regulator_bulk_get(). My proposal is extending struct
> regulator_bulk_data with a boolean flag called "optional" which would
> result in the underlying _regulator_get() receiving the OPTIONAL_GET
> flag only for the regulators that are marked as such.

Sure, but doesn't the device need to know that this supply isn't
connected - if we can just ignore the result then why bother powering
the supply on at all?

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