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
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Shawn Guo <shawnguo@kernel.org>
To: Adam Ford <aford173@gmail.com>
Cc: arm-soc <linux-arm-kernel@lists.infradead.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
NXP Linux Team <linux-imx@nxp.com>,
devicetree <devicetree@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.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
next prev parent reply other threads:[~2019-03-20 14:58 UTC|newest]
Thread overview: 17+ 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 14:03 ` Adam Ford
2019-03-06 14:04 ` [PATCH 2/3] ARM: DTS: imx6q-logicpd: Reduce inrush current on start Adam Ford
2019-03-06 14:04 ` Adam Ford
2019-03-20 12:44 ` Shawn Guo
2019-03-20 12:44 ` Shawn Guo
2019-03-20 13:41 ` Adam Ford
2019-03-20 13:41 ` Adam Ford
2019-03-20 14:57 ` Shawn Guo [this message]
2019-03-20 14:57 ` Shawn Guo
2019-03-06 14:04 ` [PATCH 3/3] ARM: DTS: imx6q-logicpd: Fix Analog audio capture Adam Ford
2019-03-06 14:04 ` Adam Ford
2019-03-20 12:46 ` Shawn Guo
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
2019-03-20 12:42 ` Shawn Guo
2019-03-20 12:42 ` Shawn Guo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190320145723.GE8337@dragon \
--to=shawnguo@kernel.org \
--cc=aford173@gmail.com \
--cc=devicetree@vger.kernel.org \
--cc=festevam@gmail.com \
--cc=kernel@pengutronix.de \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-imx@nxp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=robh+dt@kernel.org \
--cc=s.hauer@pengutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.