From patchwork Mon Mar 15 08:35:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Kepplinger X-Patchwork-Id: 401997 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=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS 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 F0EF9C433E0 for ; Mon, 15 Mar 2021 08:37:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C008964E89 for ; Mon, 15 Mar 2021 08:37:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229729AbhCOIgp (ORCPT ); Mon, 15 Mar 2021 04:36:45 -0400 Received: from comms.puri.sm ([159.203.221.185]:45130 "EHLO comms.puri.sm" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229728AbhCOIgO (ORCPT ); Mon, 15 Mar 2021 04:36:14 -0400 Received: from localhost (localhost [127.0.0.1]) by comms.puri.sm (Postfix) with ESMTP id A4899DF900; Mon, 15 Mar 2021 01:36:14 -0700 (PDT) Received: from comms.puri.sm ([127.0.0.1]) by localhost (comms.puri.sm [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id jw28Q6WTXG6X; Mon, 15 Mar 2021 01:36:14 -0700 (PDT) From: Martin Kepplinger To: martin.kepplinger@puri.sm Cc: devicetree@vger.kernel.org, festevam@gmail.com, kernel@pengutronix.de, kernel@puri.sm, krzk@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, phone-devel@vger.kernel.org, robh@kernel.org, shawnguo@kernel.org, Sebastian Krzyszkowiak Subject: [PATCH v2 2/3] arm64: dts: imx8mq-librem5-r3: Mark buck3 as always on Date: Mon, 15 Mar 2021 09:35:30 +0100 Message-Id: <20210315083531.3743183-3-martin.kepplinger@puri.sm> In-Reply-To: <20210315083531.3743183-1-martin.kepplinger@puri.sm> References: <20210311120259.3310499-1-martin.kepplinger@puri.sm> <20210315083531.3743183-1-martin.kepplinger@puri.sm> Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Sebastian Krzyszkowiak Commit 99e71c029213 ("arm64: dts: imx8mq-librem5: Don't mark buck3 as always on") removed always-on marking from GPU regulator, which is great for power saving - however it introduces additional i2c0 traffic which can be deadly for devices from the Dogwood batch. To workaround the i2c0 shutdown issue on Dogwood, this commit marks buck3 as always-on again - but only for Dogwood (r3). Signed-off-by: Sebastian Krzyszkowiak Signed-off-by: Martin Kepplinger --- arch/arm64/boot/dts/freescale/imx8mq-librem5-r3.dts | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mq-librem5-r3.dts b/arch/arm64/boot/dts/freescale/imx8mq-librem5-r3.dts index 0d38327043f8..cd3c3edd48fa 100644 --- a/arch/arm64/boot/dts/freescale/imx8mq-librem5-r3.dts +++ b/arch/arm64/boot/dts/freescale/imx8mq-librem5-r3.dts @@ -28,6 +28,10 @@ &bq25895 { ti,termination-current = <144000>; /* uA */ }; +&buck3_reg { + regulator-always-on; +}; + &proximity { proximity-near-level = <25>; };