From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755402AbdC2Ncg (ORCPT ); Wed, 29 Mar 2017 09:32:36 -0400 Received: from mail-sn1nam02on0067.outbound.protection.outlook.com ([104.47.36.67]:43165 "EHLO NAM02-SN1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754875AbdC2Ncd (ORCPT ); Wed, 29 Mar 2017 09:32:33 -0400 Authentication-Results: spf=fail (sender IP is 192.88.168.50) smtp.mailfrom=nxp.com; lists.infradead.org; dkim=none (message not signed) header.d=none;lists.infradead.org; dmarc=fail action=none header.from=nxp.com; Message-ID: <1490794343.5481.33.camel@nxp.com> Subject: Re: [RFC 8/8] ARM: dts: imx6qdl-sabresd: Enable fsl,ldo-bypass From: Leonard Crestez To: Lucas Stach CC: Mark Brown , Liam Girdwood , Viresh Kumar , "Rafael J. Wysocki" , Shawn Guo , Sascha Hauer , Mark Rutland , , Anson Huang , Irina Tirdea , , , Rob Herring , "Octavian Purdila" , Fabio Estevam , Robin Gong , Date: Wed, 29 Mar 2017 16:32:23 +0300 In-Reply-To: <1490202830.29056.8.camel@pengutronix.de> References: <8f4dca5609781f0362009dfa7f6d5c0990b5ea6d.1490199005.git.leonard.crestez@nxp.com> <1490202830.29056.8.camel@pengutronix.de> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.18.5.2-0ubuntu3.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-EOPAttributedMessage: 0 X-Matching-Connectors: 131352679500323244;(91ab9b29-cfa4-454e-5278-08d120cd25b8);() X-Forefront-Antispam-Report: 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1;CY1PR0301MB1963;7:t5QYOOaJRS+4CyrvFf0KCBACGw/PrO+FTcXa5mTo77l4+LBGrFsnd+e2GhF55K9d8cYee/ht63y+JuimnZSr7iL4uD4kDPRJgHUnGS9MZ/GJ7rZGl7sIe0853jcJQL9IHdf7/E0nUfpIhHCuUECfTlmUpIYUqlhZFrYD7EOb6e2nhkzoq8sEUCJygJDfz/J/jO04zZx59dB6QfgdfRnWFIFJ6t5C1j/KjFZTNZ8G3YUnvKxhjbaFNGI6glwVEPqPJYlCLul2W+g/KQ3vP9IgBW7iiLxxEnLbaZjT8wBVpHPaCv4b7j0b3UMCAMKCEEjnvXEEgHppDHa1l14lGBK35A== X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Mar 2017 13:32:29.8295 (UTC) X-MS-Exchange-CrossTenant-Id: 5afe0b00-7697-4969-b663-5eab37d5f47e X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=5afe0b00-7697-4969-b663-5eab37d5f47e;Ip=[192.88.168.50];Helo=[tx30smr01.am.freescale.net] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY1PR0301MB1963 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2017-03-22 at 18:13 +0100, Lucas Stach wrote: > Am Mittwoch, den 22.03.2017, 18:53 +0200 schrieb Leonard Crestez: > > This enables LDO bypass by default on the imx6qdl-sabresd boards. New > > dts files with -ldo suffix are added for users who want to run with LDOs > > enabled on these boards anyway. > Given that using LDO bypass affects the device lifetime negatively (see > AN4724), I think the default should still be to use LDO enabled mode and > have new DTs for people that desire to shorten the lifetime of the SoC > for a minimal drop in power consumption. This was based on what the Freescale BSP does, I don't particularly object to upstream having a different default. It would be nice for testing if this ldo-bypass path was enabled by default for some boards but it's not a very good reason. I will switch the default. --  Regards, Leonard