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=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,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 4A3C8ECDFB0 for ; Fri, 13 Jul 2018 12:50:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0DCDA20873 for ; Fri, 13 Jul 2018 12:50:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0DCDA20873 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729776AbeGMNEt (ORCPT ); Fri, 13 Jul 2018 09:04:49 -0400 Received: from metis.ext.pengutronix.de ([85.220.165.71]:34305 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729634AbeGMNEt (ORCPT ); Fri, 13 Jul 2018 09:04:49 -0400 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1fdxWW-0003eO-4X; Fri, 13 Jul 2018 14:50:12 +0200 Received: from mfe by dude.hi.pengutronix.de with local (Exim 4.91) (envelope-from ) id 1fdxWV-0007n2-NW; Fri, 13 Jul 2018 14:50:11 +0200 From: Marco Felsch To: lgirdwood@gmail.com, broonie@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com Cc: fabio.estevam@nxp.com, Anson.Huang@nxp.com, kernel@pengutronix.de, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/3] dt-bindings: pfuze100: add optional disable switch-regulators binding Date: Fri, 13 Jul 2018 14:50:01 +0200 Message-Id: <20180713125002.24331-2-m.felsch@pengutronix.de> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180713125002.24331-1-m.felsch@pengutronix.de> References: <20180713125002.24331-1-m.felsch@pengutronix.de> X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: mfe@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This binding is used to keep the backward compatibility with the current dtb's [1]. The binding informs the driver that the unused switch regulators can be disabled. If it is not specified, the driver doesn't disable the switch regulators. [1] https://patchwork.kernel.org/patch/10490381/ Signed-off-by: Marco Felsch --- Changes in V2: - add more information about the binding - rename binding and add vendor prefix .../devicetree/bindings/regulator/pfuze100.txt | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/devicetree/bindings/regulator/pfuze100.txt b/Documentation/devicetree/bindings/regulator/pfuze100.txt index 672c939045ff..2c46b8d368db 100644 --- a/Documentation/devicetree/bindings/regulator/pfuze100.txt +++ b/Documentation/devicetree/bindings/regulator/pfuze100.txt @@ -4,6 +4,17 @@ Required properties: - compatible: "fsl,pfuze100", "fsl,pfuze200", "fsl,pfuze3000", "fsl,pfuze3001" - reg: I2C slave address +Optional properties: +- fsl,pfuze-support-disable: Boolean, if present disable all unused switch + regulators to save power consumption. Attention, till 4.18 these regulators + were always on without specifying "regulator-always-on". So be sure to mark + import regulators as "regulator-always-on" (e.g. DDR ref, DDR supply). If + not present, the switched regualtors are always on and can't be disabled. + This binding is a workaround to keep backward compatibility with old dtb's + which rely on the fact that the switched regulators are always on and don't + mark them explicit as "regulator-always-on". On new dtbs this property should + always be present. + Required child node: - regulators: This is the list of child nodes that specify the regulator initialization data for defined regulators. Please refer to below doc -- 2.18.0