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=-6.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,T_DKIMWL_WL_HIGH,URIBL_BLOCKED,USER_AGENT_GIT 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 64A4CC282DD for ; Thu, 23 May 2019 19:31:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3B4BA217D7 for ; Thu, 23 May 2019 19:31:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558639895; bh=45/JiBrYveEN+Rj7Z+64oGLJm0MNpL+7SLALyvLUOq4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=KFFQhbaPc0h+3IlI8jmVd+6yh7QCELtJcpWTlRDGUJ6f2U9rlhapBERbSBF3Fz/bQ jiSzYUDUuLgKXxPiviQ+uVGka1TxL6qOdMeXSjtlUOp9Arbzvpk7UTUQl8y6/mDeAX P1642yFbYI1w/zhEalc0JpRBc9WEnbKDdFDaOZdM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392248AbfEWTbe (ORCPT ); Thu, 23 May 2019 15:31:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:45374 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403863AbfEWTbb (ORCPT ); Thu, 23 May 2019 15:31:31 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 404DC20879; Thu, 23 May 2019 19:31:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558639890; bh=45/JiBrYveEN+Rj7Z+64oGLJm0MNpL+7SLALyvLUOq4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S02OvLU6jCQ/QC3lDM1tuBuwxaJTjP+AKLZauUPemWE28yYYnjfxd8TSq0hrub2LP a8kqpPPshKdAYhUSF03NTbmi3ttXE/5c7PHKdcl45TCODcz0PMTJodtgV5Uoyj8odz xbMGugWUNXO0H7sr0J7fVjPv+5rrJINmhsAcsGjQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Adam Ford , Shawn Guo Subject: [PATCH 5.1 122/122] ARM: dts: imx6q-logicpd: Reduce inrush current on start Date: Thu, 23 May 2019 21:07:24 +0200 Message-Id: <20190523181721.785614665@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190523181705.091418060@linuxfoundation.org> References: <20190523181705.091418060@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Adam Ford commit dbb58e291cd47e594b64293bd91a4ce40626513c upstream. 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 Signed-off-by: Shawn Guo Signed-off-by: Greg Kroah-Hartman --- arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi | 1 + 1 file changed, 1 insertion(+) --- a/arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi +++ b/arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi @@ -100,6 +100,7 @@ regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; gpio = <&gpio1 26 GPIO_ACTIVE_HIGH>; + startup-delay-us = <70000>; enable-active-high; regulator-always-on; };