From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6F94FC43381 for ; Wed, 20 Mar 2019 12:45:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 22C032184E for ; Wed, 20 Mar 2019 12:45:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553085913; bh=8BTQVR7Tz8x3i0wDw3ag6xnAdHY300MYXCdWvjQ+5uc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=rk2prsME2tiV6uK6JDAf2aMqoJzYz+ds1AmQOtMPcxCtCuz++mQEfrFwACOK4JXkF +QuKEEarWokLGngdQnKBeO19xZRxck3lkVUytmKDezWfW1BLqn1hsOG08Zr2EJYoei w0r7VLQMIGWsujDe/ewuwajNQV2KMvaB/Lu7lDX8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728104AbfCTMpL (ORCPT ); Wed, 20 Mar 2019 08:45:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:42212 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726239AbfCTMpL (ORCPT ); Wed, 20 Mar 2019 08:45:11 -0400 Received: from dragon (98.142.130.235.16clouds.com [98.142.130.235]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3414D213F2; Wed, 20 Mar 2019 12:45:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553085911; bh=8BTQVR7Tz8x3i0wDw3ag6xnAdHY300MYXCdWvjQ+5uc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=azlQSspJF3wYSMGUEfsmi9XhUVjkRLE8JPoRJzdkaZx0QRbc3mD+Fl+TDfXjv5VJW Es3NuQdmLXE71tuz69KohHEOqLRSWTGShmtpXwp3O5xI5JxVrx71ofSCSueAPva9ot 8ET70UwfuhEau5wwtpMwZt/ufjdA1JMckzJVGEo4= Date: Wed, 20 Mar 2019 20:44:48 +0800 From: Shawn Guo To: Adam Ford Cc: linux-arm-kernel@lists.infradead.org, Rob Herring , Mark Rutland , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/3] ARM: DTS: imx6q-logicpd: Reduce inrush current on start Message-ID: <20190320124446.GO4980@dragon> References: <20190306140402.17122-1-aford173@gmail.com> <20190306140402.17122-2-aford173@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190306140402.17122-2-aford173@gmail.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. > > Signed-off-by: Adam Ford To match the convention, the 'DTS' in subject prefix should be lowercase. Shawn > > 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 >