The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 84228d5e29dbc7a6be51e221000e1d122125826c # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable@xxxxxxxxxxxxxxx>' --in-reply-to '2024012605-dangling-sprout-0d8a@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: 84228d5e29db ("ARM: dts: samsung: exynos4210-i9100: Unconditionally enable LDO12") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 84228d5e29dbc7a6be51e221000e1d122125826c Mon Sep 17 00:00:00 2001 From: Paul Cercueil <paul@xxxxxxxxxxxxxxx> Date: Wed, 6 Dec 2023 23:15:54 +0100 Subject: [PATCH] ARM: dts: samsung: exynos4210-i9100: Unconditionally enable LDO12 The kernel hangs for a good 12 seconds without any info being printed to dmesg, very early in the boot process, if this regulator is not enabled. Force-enable it to work around this issue, until we know more about the underlying problem. Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx> Fixes: 8620cc2f99b7 ("ARM: dts: exynos: Add devicetree file for the Galaxy S2") Cc: stable@xxxxxxxxxxxxxxx # v5.8+ Link: https://lore.kernel.org/r/20231206221556.15348-2-paul@xxxxxxxxxxxxxxx Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> diff --git a/arch/arm/boot/dts/samsung/exynos4210-i9100.dts b/arch/arm/boot/dts/samsung/exynos4210-i9100.dts index a9ec1f6c1dea..a076a1dfe41f 100644 --- a/arch/arm/boot/dts/samsung/exynos4210-i9100.dts +++ b/arch/arm/boot/dts/samsung/exynos4210-i9100.dts @@ -527,6 +527,14 @@ vtcam_reg: LDO12 { regulator-name = "VT_CAM_1.8V"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; + + /* + * Force-enable this regulator; otherwise the + * kernel hangs very early in the boot process + * for about 12 seconds, without apparent + * reason. + */ + regulator-always-on; }; vcclcd_reg: LDO13 {
