* [PATCH] ARM: dts: exynos/i9100: Unconditionally enable LDO12
@ 2023-08-08 11:03 Paul Cercueil
2023-08-10 6:21 ` Krzysztof Kozlowski
0 siblings, 1 reply; 3+ messages in thread
From: Paul Cercueil @ 2023-08-08 11:03 UTC (permalink / raw)
To: Krzysztof Kozlowski, Rob Herring, Conor Dooley, Alim Akhtar
Cc: devicetree, linux-arm-kernel, linux-samsung-soc, linux-kernel,
Paul Cercueil, stable
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@crapouillou.net>
Fixes: 8620cc2f99b7 ("ARM: dts: exynos: Add devicetree file for the Galaxy S2")
Cc: <stable@vger.kernel.org> # v5.8+
---
arch/arm/boot/dts/exynos4210-i9100.dts | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/arm/boot/dts/exynos4210-i9100.dts b/arch/arm/boot/dts/exynos4210-i9100.dts
index a9ec1f6c1dea..a076a1dfe41f 100644
--- a/arch/arm/boot/dts/exynos4210-i9100.dts
+++ b/arch/arm/boot/dts/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 {
--
2.40.1
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] ARM: dts: exynos/i9100: Unconditionally enable LDO12
2023-08-08 11:03 [PATCH] ARM: dts: exynos/i9100: Unconditionally enable LDO12 Paul Cercueil
@ 2023-08-10 6:21 ` Krzysztof Kozlowski
2023-08-10 9:20 ` Paul Cercueil
0 siblings, 1 reply; 3+ messages in thread
From: Krzysztof Kozlowski @ 2023-08-10 6:21 UTC (permalink / raw)
To: Paul Cercueil, Krzysztof Kozlowski, Rob Herring, Conor Dooley,
Alim Akhtar
Cc: devicetree, linux-arm-kernel, linux-samsung-soc, linux-kernel,
stable
On 08/08/2023 13:03, Paul Cercueil wrote:
> 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@crapouillou.net>
> Fixes: 8620cc2f99b7 ("ARM: dts: exynos: Add devicetree file for the Galaxy S2")
> Cc: <stable@vger.kernel.org> # v5.8+
> ---
> arch/arm/boot/dts/exynos4210-i9100.dts | 8 ++++++++
The path changed long time ago. Really, please do not work on some
outdated pmOS or whatever downstream drivers.
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] ARM: dts: exynos/i9100: Unconditionally enable LDO12
2023-08-10 6:21 ` Krzysztof Kozlowski
@ 2023-08-10 9:20 ` Paul Cercueil
0 siblings, 0 replies; 3+ messages in thread
From: Paul Cercueil @ 2023-08-10 9:20 UTC (permalink / raw)
To: Krzysztof Kozlowski, Krzysztof Kozlowski, Rob Herring,
Conor Dooley, Alim Akhtar
Cc: devicetree, linux-arm-kernel, linux-samsung-soc, linux-kernel,
stable
Le jeudi 10 août 2023 à 08:21 +0200, Krzysztof Kozlowski a écrit :
> On 08/08/2023 13:03, Paul Cercueil wrote:
> > 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@crapouillou.net>
> > Fixes: 8620cc2f99b7 ("ARM: dts: exynos: Add devicetree file for the
> > Galaxy S2")
> > Cc: <stable@vger.kernel.org> # v5.8+
> > ---
> > arch/arm/boot/dts/exynos4210-i9100.dts | 8 ++++++++
>
> The path changed long time ago. Really, please do not work on some
> outdated pmOS or whatever downstream drivers.
That was on v6.4.2 yes. I simply forgot to rebase on the latest RC,
sorry about that.
I'll send a V2, and I now have some more patches touching that file
that I can bundle with.
-Paul
^ permalink raw reply [flat|nested] 3+ messages in thread
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2023-08-08 11:03 [PATCH] ARM: dts: exynos/i9100: Unconditionally enable LDO12 Paul Cercueil
2023-08-10 6:21 ` Krzysztof Kozlowski
2023-08-10 9:20 ` Paul Cercueil
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