linux-kernel - [PATCH 0/3] arm64: dts: qcom: sc8280xp: disallow regulator mode switches

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Message-Id: <20220803121942.30236-1-johan+linaro@kernel.org>
Date:   Wed,  3 Aug 2022 14:19:39 +0200
From:   Johan Hovold <johan+linaro@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Johan Hovold <johan+linaro@...nel.org>
Subject: [PATCH 0/3] arm64: dts: qcom: sc8280xp: disallow regulator mode switches

A recent change in a USB/DP PHY driver that started specifying regulator
loads caused the regulators that were also shared with the PCIe and USB
PHYs to be put in low-power mode, something which broke PCIe and USB on
sa8295p-adp.

As was discussed in the following thread:

	https://lore.kernel.org/all/YtkrDcjTGhpaU1e0@hovoldconsulting.com

regulators should generally not be allowed to switch to low-power mode
unless some of the consumers can actually support an idle mode.

This series disables mode-switching for all regulators on sc8280xp-crd,
sc8280xp-lenovo-thinkpad-x13s and sa8295p-adp except for the ones used
by the UFS controllers which do support an idle mode.

Johan

Johan Hovold (3):
  arm64: dts: qcom: sc8280xp-crd: disallow regulator mode switches
  arm64: dts: qcom: sc8280xp-lenovo-thinkpad-x13s: disallow regulator
    mode switches
  arm64: dts: qcom: sa8295p-adp: disallow regulator mode switches

 arch/arm64/boot/dts/qcom/sa8295p-adp.dts              | 11 -----------
 arch/arm64/boot/dts/qcom/sc8280xp-crd.dts             |  9 ---------
 .../boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts   | 10 ----------
 3 files changed, 30 deletions(-)

-- 
2.35.1