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

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Date:   Fri, 29 Oct 2021 18:39:47 +0300
From:   Adrian Ratiu <adrian.ratiu@...labora.com>
To:     Will Deacon <will@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        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: [PATCH v2] arm64: defconfig: enable regulator to fix mt8173 regression

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>
---

Changes in v2:
  * Added Fixes tag
  * Slight rewording of commit msg to improve clarity

---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 545197bc0501..fb82971ff654 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -615,6 +615,7 @@ CONFIG_REGULATOR_FIXED_VOLTAGE=y
 CONFIG_REGULATOR_AXP20X=y
 CONFIG_REGULATOR_BD718XX=y
 CONFIG_REGULATOR_BD9571MWV=y
+CONFIG_REGULATOR_DA9211=y
 CONFIG_REGULATOR_FAN53555=y
 CONFIG_REGULATOR_GPIO=y
 CONFIG_REGULATOR_HI6421V530=y
-- 
2.33.1