* [PATCH 1/2] arm64: dts: exynos: Fix silent hang after boot [not found] <CGME20200705071805epcas5p37045f009655c40d573077babf17c51fa@epcas5p3.samsung.com> @ 2020-07-05 6:57 ` Alim Akhtar [not found] ` <CGME20200705071806epcas5p27abbd5b89689ab16328807bb5a213abf@epcas5p2.samsung.com> 0 siblings, 1 reply; 2+ messages in thread From: Alim Akhtar @ 2020-07-05 6:57 UTC (permalink / raw) To: rzk Cc: devicetree, linux-arm-kernel, linux-samsung-soc, linux-kernel, robh+dt, Alim Akhtar 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 ^ permalink raw reply related [flat|nested] 2+ messages in thread
[parent not found: <CGME20200705071806epcas5p27abbd5b89689ab16328807bb5a213abf@epcas5p2.samsung.com>]
* [PATCH 2/2] arm64: dts: exynos: keep LDO12 always-on [not found] ` <CGME20200705071806epcas5p27abbd5b89689ab16328807bb5a213abf@epcas5p2.samsung.com> @ 2020-07-05 6:57 ` Alim Akhtar 0 siblings, 0 replies; 2+ messages in thread From: Alim Akhtar @ 2020-07-05 6:57 UTC (permalink / raw) To: rzk Cc: devicetree, linux-arm-kernel, linux-samsung-soc, linux-kernel, robh+dt, Alim Akhtar LDO12 on exynos7 supply power to VDDQ_UFS20_RESET, in case this regulator is OFF, UFS host controller can not send command to UFS device. To keep this supply ON, set regulator-always-on property for this ldo. 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 bb86950032d3..92fecc539c6c 100644 --- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts +++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts @@ -194,6 +194,7 @@ regulator-min-microvolt = <1000000>; regulator-max-microvolt = <1300000>; regulator-enable-ramp-delay = <125>; + regulator-always-on; }; ldo13_reg: LDO13 { -- 2.17.1 ^ permalink raw reply related [flat|nested] 2+ messages in thread
end of thread, other threads:[~2020-07-05 7:18 UTC | newest] Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- [not found] <CGME20200705071805epcas5p37045f009655c40d573077babf17c51fa@epcas5p3.samsung.com> 2020-07-05 6:57 ` [PATCH 1/2] arm64: dts: exynos: Fix silent hang after boot Alim Akhtar [not found] ` <CGME20200705071806epcas5p27abbd5b89689ab16328807bb5a213abf@epcas5p2.samsung.com> 2020-07-05 6:57 ` [PATCH 2/2] arm64: dts: exynos: keep LDO12 always-on Alim Akhtar
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