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arm64: dts: exynos: Fix silent hang after boot on Espresso
authorAlim Akhtar <alim.akhtar@samsung.com>
Sun, 5 Jul 2020 07:09:17 +0000 (12:39 +0530)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 21 Aug 2020 07:48:03 +0000 (09:48 +0200)
[ 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 patch | blob | blame | history

diff --git a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
index 4a8b1fb51243c4a628fd3a27dd7b82ec9ecb3e78..c8824b918693d081f14bbf1fc275485c1ca4ce5d 100644 (file)
--- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
+++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
@@ -155,6 +155,7 @@
                                regulator-min-microvolt = <700000>;
                                regulator-max-microvolt = <1150000>;
                                regulator-enable-ramp-delay = <125>;
+                               regulator-always-on;
                        };
 
                        ldo8_reg: LDO8 {