From: Alim Akhtar <alim.akhtar@samsung.com>
To: krzk@kernel.org
Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
robh+dt@kernel.org, Alim Akhtar <alim.akhtar@samsung.com>
Subject: [PATCH v1 1/2] arm64: dts: exynos: Fix silent hang after boot
Date: Sun, 5 Jul 2020 12:39:17 +0530 [thread overview]
Message-ID: <20200705070918.63531-1-alim.akhtar@samsung.com> (raw)
In-Reply-To: CGME20200705072937epcas5p1b6c9a25770451bcb9d8bc5b14b8a8b53@epcas5p1.samsung.com
Once regulators are disabled after kernel boot, on espresso
board silent hang observed because of LDO7 being disabled.
LDO7 actually provide power to CPU cores and non-cpu blocks
circuitries.
Keep this regulator always-on to fix this hang.
Fixes: 9589f7721e16 ("arm64: dts: Add S2MPS15 PMIC node on exynos7-espresso")
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
---
-
arch/arm64/boot/dts/exynos/exynos7-espresso.dts | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
index 790f12ca8981..bb86950032d3 100644
--- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
+++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
@@ -157,6 +157,7 @@
regulator-min-microvolt = <700000>;
regulator-max-microvolt = <1150000>;
regulator-enable-ramp-delay = <125>;
+ regulator-always-on;
};
ldo8_reg: LDO8 {
base-commit: 9e50b94b3eb0d859a2586b5a40d7fd6e5afd9210
--
2.17.1
next parent reply other threads:[~2020-07-05 7:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20200705072937epcas5p1b6c9a25770451bcb9d8bc5b14b8a8b53@epcas5p1.samsung.com>
2020-07-05 7:09 ` Alim Akhtar [this message]
[not found] ` <CGME20200705072938epcas5p479f0d040ca34fd44b2ba893a199efb79@epcas5p4.samsung.com>
2020-07-05 7:09 ` [PATCH v1 2/2] arm64: dts: exynos: keep LDO12 always-on Alim Akhtar
2020-07-05 18:23 ` Krzysztof Kozlowski
2020-07-06 15:53 ` Alim Akhtar
2020-07-07 6:40 ` 'Krzysztof Kozlowski'
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