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=-8.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,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 11D9EC4360F for ; Tue, 2 Apr 2019 19:19:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D4CEB2082C for ; Tue, 2 Apr 2019 19:19:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="AHbabakp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730611AbfDBTT0 (ORCPT ); Tue, 2 Apr 2019 15:19:26 -0400 Received: from mail-io1-f68.google.com ([209.85.166.68]:34047 "EHLO mail-io1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726083AbfDBTT0 (ORCPT ); Tue, 2 Apr 2019 15:19:26 -0400 Received: by mail-io1-f68.google.com with SMTP id n11so11949364ioh.1; Tue, 02 Apr 2019 12:19:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=KAuT93FL/T7+bDPNkTO+kqBb77YV0Jq933v3CJxUkZw=; b=AHbabakp2VubV4yWs1vbHuWcxA5uj9EQDgxv44uikqQPKGD+EozaZik4y2E1RsyPHr 1c/cFYwjSTqNGza2ipL/DRjesdMEHk4p0a70YMQpko4F+sb/sbbGXzlu+3RzEl8CSITd wXs8d0rRNbAy8RibRBULZ0pJcutU1jLZfm6uJCnKzZphEd+0p+TrxyRo0u6PMTSV4eF2 Ni+LIQXrYfbDdE1LPeJOKbfzRXcIaJAMyt3ot6LfDdbZALx8M+iTwlSPb1SeFEUCsaPW NTNIkiOqEGuUPzOwcgxorAJuhPIbOpLVMsXPlcXaNINFO+KK9+g7S8R/j2YFfVlZf9Tb rzeQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=KAuT93FL/T7+bDPNkTO+kqBb77YV0Jq933v3CJxUkZw=; b=qRGqPJE9Mo0BUQ180Qj1fv88EoBWstCFyk6ZHYD93rT4AvLhBGAHd9mY6Yhad+vBMZ q6uz1ZvCfhohMRmWXYdtyLnU/Sv2+2AVhTOsqo4BMIBczHrcMWK/TsoKKBbZFg/P/AI6 p/d4TMH4Oq+g+VrcLbqfKZczCyuhe2zbBhZHKZNQWeqg69jEEj4Ou4fY/eDFxG7gC+Ri TU/SSa5HxBYvqjB9gKGI0evp5Jdlm/nXYjpJtWaNMQ9LzADBQEqwajXZ8Kdha9yuCc1i UURWwPQNK5bDWfNZv+eVnRp+KLXwYvFwAcubysHok+p+1p/Ylw+cxqmcng9G4vqwrXLa 23HA== X-Gm-Message-State: APjAAAX3z+yIkwtpToDb+K02M5FOuJeWFwM92OCIfAo/DjVF5NeG4Cnj TlFCE2ky63wy9BhF3g/soIQ= X-Google-Smtp-Source: APXvYqyOykSfVzJdj7sp/mJ0SO0aEslbKdXnQ/KMJk2kHJsX4SHBMT1t/urWpC6AJlO5l0SHIMa5mg== X-Received: by 2002:a5d:8910:: with SMTP id b16mr46782280ion.178.1554232765383; Tue, 02 Apr 2019 12:19:25 -0700 (PDT) Received: from localhost.localdomain (c-73-37-219-234.hsd1.mn.comcast.net. [73.37.219.234]) by smtp.gmail.com with ESMTPSA id m143sm7428370itm.32.2019.04.02.12.19.23 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 02 Apr 2019 12:19:24 -0700 (PDT) From: Adam Ford To: linux-arm-kernel@lists.infradead.org Cc: adam.ford@logicpd.com, Adam Ford , Rob Herring , Mark Rutland , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH V2] ARM: dts: imx6q-logicpd: Reduce inrush current on start Date: Tue, 2 Apr 2019 14:19:08 -0500 Message-Id: <20190402191908.4306-1-aford173@gmail.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 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