From: Adam Ford <aford173@gmail.com>
To: linux-arm-kernel@lists.infradead.org
Cc: Adam Ford <aford173@gmail.com>, Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Shawn Guo <shawnguo@kernel.org>,
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@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/3] ARM: DTS: imx6q-logicpd: Reduce inrush current on start
Date: Wed, 6 Mar 2019 08:04:00 -0600 [thread overview]
Message-ID: <20190306140402.17122-2-aford173@gmail.com> (raw)
In-Reply-To: <20190306140402.17122-1-aford173@gmail.com>
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")
Signed-off-by: Adam Ford <aford173@gmail.com>
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
next prev parent reply other threads:[~2019-03-06 14:04 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 ` Adam Ford [this message]
2019-03-20 12:44 ` [PATCH 2/3] ARM: DTS: imx6q-logicpd: Reduce inrush current on start Shawn Guo
2019-03-20 13:41 ` Adam Ford
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
2019-03-20 12:46 ` Shawn Guo
2019-03-20 12:42 ` [PATCH 1/3] ARM: dts: imx6q-logicpd: Shutdown LCD regulator during suspend 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=20190306140402.17122-2-aford173@gmail.com \
--to=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 \
--cc=shawnguo@kernel.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).