From: Shawn Guo <shawnguo@kernel.org>
To: Adam Ford <aford173@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
devicetree <devicetree@vger.kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Rob Herring <robh+dt@kernel.org>,
NXP Linux Team <linux-imx@nxp.com>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
arm-soc <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 2/3] ARM: DTS: imx6q-logicpd: Reduce inrush current on start
Date: Wed, 20 Mar 2019 22:57:25 +0800 [thread overview]
Message-ID: <20190320145723.GE8337@dragon> (raw)
In-Reply-To: <CAHCN7x+DKh8bR17C90o-zKKnFqWe_Yz5EM68xEiSY0W6ufNARA@mail.gmail.com>
On Wed, Mar 20, 2019 at 08:41:27AM -0500, Adam Ford wrote:
> 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.
Yes, if you would like to get it in as a fix, please elaborate the real
world issue it fixes.
Shawn
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next prev parent reply other threads:[~2019-03-20 14:58 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-06 14:03 [PATCH 1/3] ARM: dts: imx6q-logicpd: Shutdown LCD regulator during suspend Adam Ford
2019-03-06 14:04 ` [PATCH 2/3] ARM: DTS: imx6q-logicpd: Reduce inrush current on start Adam Ford
2019-03-20 12:44 ` Shawn Guo
2019-03-20 13:41 ` Adam Ford
2019-03-20 14:57 ` Shawn Guo [this message]
2019-03-06 14:04 ` [PATCH 3/3] ARM: DTS: imx6q-logicpd: Fix Analog audio capture Adam Ford
2019-03-20 12:46 ` Shawn Guo
2019-03-20 12:42 ` [PATCH 1/3] ARM: dts: imx6q-logicpd: Shutdown LCD regulator during suspend Shawn Guo
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