linux-kernel - Re: [PATCH v2] arm64: defconfig: enable regulator to fix mt8173 regression

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Date:   Fri, 29 Oct 2021 19:00:08 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Adrian Ratiu <adrian.ratiu@...labora.com>,
        Will Deacon <will@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, kernel@...labora.com,
        "kernelci . org bot" <bot@...nelci.org>,
        Guillaume Tucker <guillaume.tucker@...labora.com>,
        Enric Balletbo Serra <eballetbo@...il.com>
Subject: Re: [PATCH v2] arm64: defconfig: enable regulator to fix mt8173
 regression

Il 29/10/21 17:39, Adrian Ratiu ha scritto:
> A regression was introduced on some mediatek boards starting with
> v5.15-rc1 in commit 109fd20601e2 ("arm64: dts: mediatek: mt8173:
> Add domain supply for mfg_async") which effectively changed the
> regulator from the always-on dummy to DA9211 without explicitely
> enabling it, causing failures caught by KernelCI on Hana
> Chromebooks [1] for previously used dummies like:
> 
> mtk-power-controller 10006000.syscon:power-controller: supply domain not found, using dummy regulator
> mtu3 11271000.usb: supply vbus not found, using dummy regulator
> xhci-mtk 11270000.usb: supply vbus not found, using dummy regulator
> 
> There might be another bug linking these power domains in the
> mediatek PM driver, but that is a separate issue wich needs
> addressing, for now just fix the obvious regression due to the
> new regulator requirement.
> 
> [1] https://github.com/kernelci/kernelci-project/issues/66
> Fixes: 109fd20601e2 ("arm64: dts: mediatek: mt8173: Add domain supply for mfg_async")
> Reported-by: "kernelci.org bot" <bot@...nelci.org>
> Cc: Guillaume Tucker <guillaume.tucker@...labora.com>
> Suggested-by: Enric Balletbo Serra <eballetbo@...il.com>
> Signed-off-by: Adrian Ratiu <adrian.ratiu@...labora.com>

Tested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>