From nobody Sat Sep 21 20:01:01 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A15D2C19F29 for ; Wed, 27 Jul 2022 09:40:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231190AbiG0Jkq (ORCPT ); Wed, 27 Jul 2022 05:40:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52932 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229600AbiG0Jkn (ORCPT ); Wed, 27 Jul 2022 05:40:43 -0400 Received: from mail-pg1-x52f.google.com (mail-pg1-x52f.google.com [IPv6:2607:f8b0:4864:20::52f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9AF9C1EADD for ; Wed, 27 Jul 2022 02:40:41 -0700 (PDT) Received: by mail-pg1-x52f.google.com with SMTP id q16so15467011pgq.6 for ; Wed, 27 Jul 2022 02:40:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=p3g9EzZvah+Gtbwyip2cq8Rx7bbD/kksWxXGuqDH5TY=; b=OLy9K64vZZHKw0I+myiumXXJ327EZ4fO3D1r2oechF169QBzjqFtMoDj48XCEzguWr Jf+Vw4UDazDGZvOY6ulcOQMnzjr3gM7TZ65azJMCxSOLoX0azoax7Mq01l2x97ykNL6a yCfBTrocZQzWSIkV5wODMg/0o8THtuU51HUO4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=p3g9EzZvah+Gtbwyip2cq8Rx7bbD/kksWxXGuqDH5TY=; b=1H1U0ANekrymrFm5EwHhSFB3DDqpL16QsO1kfnQgGSzDmyMuoim0AJXU15WowxO99/ 81Gr3pQ6pEWIiLY3pQfVlpulFXg4XGKbNTYhPUwY4G9catN79V4E4dM1ZFinVoI0EzD+ NnuSVDRpusTyUA7k4UML61Sdb7ac6Mjaf2IaUP4Itbz7SVJE+tXbjFZp0t+veRZYwkEX mELNxjKACX9CWqem9ScWdB478eXIyAPa7/3RXzsw2V3XSjGT0cj9WSiUGSoFoJN7NgEZ UbJI48dAzDIEBGg+AJ52uEL2vXF058J/LhPWNaUIIp80ysQviNdT/kmaYdT5lpc35vph VuIA== X-Gm-Message-State: AJIora/ygZkEZZ//dSLAodT6ZrYdS2hGmn18+9hvttt6/DCGga0k8upd xFU09/+S/z6e/SJRiL+WOLmajWiw9lb/Hw== X-Google-Smtp-Source: AGRyM1vGMx/eXGTZ84c6OPRVIy6bKdnF7BHfGiWW4X9zD6FGDwvusPvwvbJ1cKMBXJc6IoBM5UTbWw== X-Received: by 2002:a63:6b83:0:b0:41a:8419:c20b with SMTP id g125-20020a636b83000000b0041a8419c20bmr17730751pgc.522.1658914841179; Wed, 27 Jul 2022 02:40:41 -0700 (PDT) Received: from treapking.tpe.corp.google.com ([2401:fa00:1:10:8dc7:aefe:3b5a:da1e]) by smtp.gmail.com with ESMTPSA id e9-20020a170902784900b001678dcb4c5asm11775613pln.100.2022.07.27.02.40.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Jul 2022 02:40:40 -0700 (PDT) From: Pin-yen Lin To: Matthias Brugger , linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Eizan Miyamoto , Hsin-Yi Wang , Evan Benn , Pin-yen Lin , Krzysztof Kozlowski , Rob Herring , devicetree@vger.kernel.org Subject: [PATCH v2] arm64: dts: mt8173-oak: Switch to SMC watchdog Date: Wed, 27 Jul 2022 17:40:34 +0800 Message-Id: <20220727094034.1372745-1-treapking@chromium.org> X-Mailer: git-send-email 2.37.1.359.gd136c6c3e2-goog MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Switch to SMC watchdog because we need direct control of HW watchdog registers from kernel. The corresponding firmware was uploaded in https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/3405. Signed-off-by: Pin-yen Lin --- Changes in v2: - Move the modifications to mt8173-elm.dtsi and add some comments. arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi b/arch/arm64/boot= /dts/mediatek/mt8173-elm.dtsi index e21feb85d822..b2269770abc3 100644 --- a/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi @@ -161,6 +161,18 @@ hdmi_connector_in: endpoint { }; }; }; + + soc { + /* + * Disable the original MMIO watch dog and switch to the SMC watchdog, + * which operates on the same MMIO. + */ + /delete-node/ watchdog@10007000; + + watchdog { + compatible =3D "arm,smc-wdt"; + }; + }; }; =20 &mfg_async { --=20 2.37.1.359.gd136c6c3e2-goog