From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Alim Akhtar <alim.akhtar@samsung.com>,
Krzysztof Kozlowski <krzk@kernel.org>,
Sasha Levin <sashal@kernel.org>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org
Subject: [PATCH AUTOSEL 4.14 07/14] arm64: dts: exynos: Fix silent hang after boot on Espresso
Date: Sat, 8 Aug 2020 19:40:06 -0400 [thread overview]
Message-ID: <20200808234013.3619541-7-sashal@kernel.org> (raw)
In-Reply-To: <20200808234013.3619541-1-sashal@kernel.org>
From: Alim Akhtar <alim.akhtar@samsung.com>
[ Upstream commit b072714bfc0e42c984b8fd6e069f3ca17de8137a ]
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>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 4a8b1fb51243c..c8824b918693d 100644
--- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
+++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
@@ -155,6 +155,7 @@ ldo7_reg: LDO7 {
regulator-min-microvolt = <700000>;
regulator-max-microvolt = <1150000>;
regulator-enable-ramp-delay = <125>;
+ regulator-always-on;
};
ldo8_reg: LDO8 {
--
2.25.1
parent reply other threads:[~2020-08-08 23:42 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20200808234013.3619541-1-sashal@kernel.org>]
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