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    Subject[PATCH 5.7 025/393] arm64: dts: exynos: Fix silent hang after boot on Espresso
    Date
    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 7af288fa9475f..a9412805c1d6a 100644
    --- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
    +++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
    @@ -157,6 +157,7 @@ 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


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