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    SubjectRe: [PATCH 2/3] ARM: DTS: imx6q-logicpd: Reduce inrush current on start
    On Wed, Mar 20, 2019 at 7:45 AM Shawn Guo <shawnguo@kernel.org> wrote:
    >
    > On Wed, Mar 06, 2019 at 08:04:00AM -0600, Adam Ford wrote:
    > > The main 3.3V regulator sources a series of additional regulators.
    > > This patch adds a small delay, so when the 3.3V regulator comes
    > > on it delays a bit before the subsequent regulators can come on.
    > > This reduces the inrush current a bit on the external DC power
    > > supply.
    > >
    > > Fixes: 1c207f911fe9 ("ARM: dts: imx: Add support for Logic PD
    > > i.MX6QD EVM")
    >
    > Same comment as patch #1.

    The sourcing regulator occasionally cuts out because the inrush is so
    high. I would argue that preventing a hardware issue like that would
    be a 'fix' and if it helps, I could add that to the description.

    >
    > >
    > > Signed-off-by: Adam Ford <aford173@gmail.com>
    >
    > To match the convention, the 'DTS' in subject prefix should be
    > lowercase.

    I will fix in V2.

    >
    > Shawn

    adam
    >
    > >
    > > diff --git a/arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi b/arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi
    > > index fb01fa6e4224..e31b6923cb72 100644
    > > --- a/arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi
    > > +++ b/arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi
    > > @@ -99,6 +99,7 @@
    > > regulator-min-microvolt = <3300000>;
    > > regulator-max-microvolt = <3300000>;
    > > gpio = <&gpio1 26 GPIO_ACTIVE_HIGH>;
    > > + startup-delay-us = <70000>;
    > > enable-active-high;
    > > regulator-always-on;
    > > };
    > > --
    > > 2.17.1
    > >

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