From patchwork Fri Feb 21 05:38:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Evan Benn X-Patchwork-Id: 11395571 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9DA1892A for ; Fri, 21 Feb 2020 05:38:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7D3DE207FD for ; Fri, 21 Feb 2020 05:38:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="QVp/FC2N" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726244AbgBUFiU (ORCPT ); Fri, 21 Feb 2020 00:38:20 -0500 Received: from mail-pf1-f196.google.com ([209.85.210.196]:38633 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725973AbgBUFiU (ORCPT ); Fri, 21 Feb 2020 00:38:20 -0500 Received: by mail-pf1-f196.google.com with SMTP id x185so613507pfc.5 for ; Thu, 20 Feb 2020 21:38:19 -0800 (PST) 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=xR1GRxFdUV2TwDvxuNR/pK3VYzRWJYZmKivDEUcKc5w=; b=QVp/FC2NiAc3rBycqqqlyoa0rlWBGhP8nW8nvvVd1pRXp9Io6ugF1YFhOrlCramk4m maGakRF1l77Fn3JdI/QLF3uqnkV56NYnLn0ct7McCl8jjFS/RuIzCVK4rKwS0eMsanTp JJZ6xUxzRnD685IHKwcVyvWnx6ogkbaou6bhU= 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:mime-version :content-transfer-encoding; bh=xR1GRxFdUV2TwDvxuNR/pK3VYzRWJYZmKivDEUcKc5w=; b=MQyOFy+LHasLJDVkezyoqx0Hf/t0egGxXRArSWAo/aQbqLMK4GNqHp8kN96+pEtNqK kQRqwKj7I4lykiZgu2g4itPQ05hu9bye0gtVXwsHfnrtzlB+tdBhBaWuQlniujU9ZLK6 jCB2pH6lPM7LPJRq2YflPTwQqXTr+tjBhYNQ9sWqTYrRQfo9jsduiDaiJSKjuMLOwFPK Emv3CQeU0XjZmLz29BbVFnBG+FIlnHTLy6ZtVcIGI1Fa/jkYa15ycUxo6nn8Zxg8bIBH ZXc9U6s7PZeAkrGx1SDhT2dw0Met2hT326E1q+3eazwKIxjKfaGJbLFEeaPTP9L2Pp/5 s92g== X-Gm-Message-State: APjAAAWFCwEpQfQwnRXgh6qQ29wvuA7PoriqPa4396PydETWgt/Dvux7 ybx3yrXYzga7mbo2NcQEeGD7ZA== X-Google-Smtp-Source: APXvYqwNbEeASGO4ArQ+KQ49tlopvldlo5/I0QneTu45MVpD2X1Vvxvy9falEjB7Hs8GL48/Mzv+xA== X-Received: by 2002:a62:486:: with SMTP id 128mr36207829pfe.236.1582263499298; Thu, 20 Feb 2020 21:38:19 -0800 (PST) Received: from localhost ([2401:fa00:9:14:1105:3e8a:838d:e326]) by smtp.gmail.com with ESMTPSA id b25sm1329060pfo.38.2020.02.20.21.38.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 20 Feb 2020 21:38:18 -0800 (PST) From: Evan Benn To: LKML Cc: jwerner@chromium.org, Evan Benn , Anson Huang , Catalin Marinas , =?utf-8?b?Q2zDqW1lbnQgUMOpcm9u?= , "David S. Miller" , Dinh Nguyen , Greg Kroah-Hartman , Guenter Roeck , Jonathan Cameron , Leonard Crestez , Marcin Juszkiewicz , Mark Rutland , Matthias Brugger , Mauro Carvalho Chehab , Olof Johansson , Rob Herring , Rob Herring , Shawn Guo , Will Deacon , Wim Van Sebroeck , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-watchdog@vger.kernel.org Subject: [PATCH v2 0/2] Add a watchdog driver that uses ARM Secure Monitor Calls. Date: Fri, 21 Feb 2020 16:38:00 +1100 Message-Id: <20200221053802.70716-1-evanbenn@chromium.org> X-Mailer: git-send-email 2.25.0.265.gbab2e86ba0-goog MIME-Version: 1.0 Sender: linux-watchdog-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org This is currently supported in firmware deployed on oak, hana and elm mt8173 chromebook devices. The kernel driver is written to be a generic SMC watchdog driver. Arm Trusted Firmware upstreaming review: https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/3405 Patch to add oak, hana, elm device tree: https://lore.kernel.org/linux-arm-kernel/20200110073730.213789-1-hsinyi@chromium.org/ I would like to add the device tree support after the above patch is accepted. Changes in v2: - Change name arm > mt8173 - use watchdog_stop_on_reboot - use watchdog_stop_on_unregister - use devm_watchdog_register_device - remove smcwd_shutdown, smcwd_remove - change error codes Evan Benn (1): dt-bindings: watchdog: Add mt8173,smc-wdt watchdog Julius Werner (1): watchdog: Add new mt8173_smc_wdt watchdog driver .../bindings/watchdog/mt8173,smc-wdt.yaml | 30 ++++ MAINTAINERS | 7 + arch/arm64/configs/defconfig | 1 + drivers/watchdog/Kconfig | 13 ++ drivers/watchdog/Makefile | 1 + drivers/watchdog/mt8173_smc_wdt.c | 160 ++++++++++++++++++ 6 files changed, 212 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/mt8173,smc-wdt.yaml create mode 100644 drivers/watchdog/mt8173_smc_wdt.c