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=-5.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 F24BBC10F13 for ; Thu, 11 Apr 2019 05:45:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B45D420850 for ; Thu, 11 Apr 2019 05:45:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554961558; bh=xMFA9k2aAZ/2KWRIol4/Fr9unAldZHNiAgrbz+nckB4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=ygJfsGg5K1bEfGDnms548ivIcXvA0E+IzHgGmA1qAQxDE323acm2I53pxI96+QJQO wq3oY3++NrljK7CpoN8JwMr1+EhgOXDOg3Sby4Ae6VTjh7sBYh9eRNQxnovNnkvHRe V9Is8FhrRuykmGD9e+Tq/at6milbtpWFGSwa284c= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726812AbfDKFp5 (ORCPT ); Thu, 11 Apr 2019 01:45:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:52940 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725783AbfDKFp5 (ORCPT ); Thu, 11 Apr 2019 01:45:57 -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 D4E6A2083E; Thu, 11 Apr 2019 05:45:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554961556; bh=xMFA9k2aAZ/2KWRIol4/Fr9unAldZHNiAgrbz+nckB4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=OCQReaacZTVssH3K5Fq4VW9lBbkJGzdtZ8Zt9fEYVe+X5jWoF5gB2SndtOd4lNWry hum4FsWNDqrUCyPx+g7eAo/781jZJ/RpyPBPJkXXO9Z869BeGEzpl+JT68On+cRMD6 95GvX6o9ThcRjIt0PK83FaWkfkYyygjHJnuXEGaA= Date: Thu, 11 Apr 2019 13:45:42 +0800 From: Shawn Guo To: Adam Ford Cc: linux-arm-kernel@lists.infradead.org, adam.ford@logicpd.com, 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 V2] ARM: dts: imx6q-logicpd: Reduce inrush current on start Message-ID: <20190411054541.GS26817@dragon> References: <20190402191908.4306-1-aford173@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190402191908.4306-1-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 Tue, Apr 02, 2019 at 02:19:08PM -0500, 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 to help prevent a situation where the sourcing power supply > cannot source enough current and overloads and the kit fails to > start. > > Fixes: 1c207f911fe9 ("ARM: dts: imx: Add support for Logic PD > i.MX6QD EVM") > > Signed-off-by: Adam Ford Applied, thanks.