From patchwork Fri Apr 3 05:28:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Evan Benn X-Patchwork-Id: 11471819 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 DF18A159A for ; Fri, 3 Apr 2020 05:29:27 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BBF9E20787 for ; Fri, 3 Apr 2020 05:29:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="HkevyevZ"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="Xi5KMTsZ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BBF9E20787 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=ZHfuc1yH9Rb1JDoh84J/HAmxVqhl1DapZTCX0swTR/g=; b=HkevyevZ5OpJO3 sTgIqa2h7JEWKzODG5eeJsHTpOdoVUPvRW3v1j7/vJzmB/0DdHThbU/GpVy4upQeX1PFAj7MWaHzj 3rdS/mlEn+bHKWK2FRIYFcSMyf7rCxODpkmu+IdSuDrPXKt3uhsFDBqCI7Aon5z34SSS17chxfLcZ IKeb6fo3VXXiaU1QKZt9ti8AqPpDGVrAfpyc6HATgzDKVT+rdjaHfiVCydQiJ6KwkBIWlXpRTNWgy uCDusctyJcwqHZhzO9aR46YoRguBHa1Qk9cHd9AMe2RarQWRcYvwRj9zjvPES/DsedSWYaX7j+lT/ l+uGmhWnQ3h/7XnxVM5A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jKEtP-00042e-MH; Fri, 03 Apr 2020 05:29:23 +0000 Received: from mail-pf1-x442.google.com ([2607:f8b0:4864:20::442]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jKEtM-00040g-BT for linux-arm-kernel@lists.infradead.org; Fri, 03 Apr 2020 05:29:22 +0000 Received: by mail-pf1-x442.google.com with SMTP id a24so2938941pfc.8 for ; Thu, 02 Apr 2020 22:29:16 -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=TWUVEWHfILYD4mLoLxiKPBxfXnp3kNrR0NuQf2K0ahQ=; b=Xi5KMTsZkOO7QTHFIZYuRuEr2Z/+6lNWa58ajHP5SQHleic4V+fa3OVt47Iv2/Ytlo AXpJAyiP3yJ3dlaDdpHDhDZFU6cTeYM5BpcgJRXE6fBovCc7bjdG4NRusRfkdLgkky0y VuKqJHgsxIvuagj4lAOrlp9zMnQUOMncAdPIA= 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=TWUVEWHfILYD4mLoLxiKPBxfXnp3kNrR0NuQf2K0ahQ=; b=cIyNlHST2fyOf5J7/psz8mIaOERxeND+FZDW69Sa8IPiy29irsPqaOz09Wyp8Yv8Fp lzD/75Nv8DC1btT0pgkYvEf3WtMvrzkD6eX9BLrA/jQu4aWDZLWvr4ErTpQSR2OiI7cU SJB4OV8clNmLg4NnGmD7Jc2xI++UwOM0Y9FCCvkeGphWFGIzneFpclKFkM4yadjZCyVJ x5O+7x2jIqitG5VjU/PtEIV1KfM/qBrUXvg/iALeAV+UydBpCE9Gy7fRgNkFS0eS7Nq7 2FR3asKPAF9i2DL/AjlFVFUf/powsBC+0+a+ly9tSsydLNX05Cn66BRY04EaeVKmzNQo QmJg== X-Gm-Message-State: AGi0PuapwOtdpzw6wbFv8oRuCQX8Jg/F9wtu2JBLKSzJnqS2d2Ty2XXZ k4Dt1W66er3abjukBNtpFkYmSA== X-Google-Smtp-Source: APiQypJwFGVlMhKNjzHxxikpLJzTjv9S0yp8wd3gigfUtQE9RxnY+jxENnaohkQ5QkAddaxMxtczTg== X-Received: by 2002:aa7:961c:: with SMTP id q28mr7020119pfg.177.1585891755586; Thu, 02 Apr 2020 22:29:15 -0700 (PDT) Received: from localhost ([2401:fa00:9:14:1105:3e8a:838d:e326]) by smtp.gmail.com with ESMTPSA id c21sm4451578pgn.84.2020.04.02.22.29.07 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 02 Apr 2020 22:29:15 -0700 (PDT) From: Evan Benn To: LKML Subject: [PATCH v2 0/2] Add a watchdog driver that uses ARM Secure Monitor Calls. Date: Fri, 3 Apr 2020 16:28:58 +1100 Message-Id: <20200403052900.258855-1-evanbenn@chromium.org> X-Mailer: git-send-email 2.26.0.292.g33ef6b2f38-goog MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200402_222920_421501_3837E16D X-CRM114-Status: GOOD ( 14.10 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:442 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Catalin Marinas , Bjorn Andersson , Manivannan Sadhasivam , Leonard Crestez , Will Deacon , xingyu.chen@amlogic.com, Rob Herring , Wim Van Sebroeck , Anson Huang , Mauro Carvalho Chehab , Marcin Juszkiewicz , Evan Benn , Valentin Schneider , Guenter Roeck , devicetree@vger.kernel.org, linux-watchdog@vger.kernel.org, Rob Herring , linux-mediatek@lists.infradead.org, Jonathan Cameron , Matthias Brugger , Andy Shevchenko , linux-arm-kernel@lists.infradead.org, Greg Kroah-Hartman , Vinod Koul , Olof Johansson , jwerner@chromium.org, Shawn Guo , "David S. Miller" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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 v3: - Change name back to arm - Add optional get_timeleft op - change name to arm_smc_wdt 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 ARM smc wdt for mt8173 watchdog Julius Werner (1): watchdog: Add new arm_smd_wdt watchdog driver .../bindings/watchdog/arm-smc-wdt.yaml | 30 +++ MAINTAINERS | 7 + arch/arm64/configs/defconfig | 1 + drivers/watchdog/Kconfig | 13 ++ drivers/watchdog/Makefile | 1 + drivers/watchdog/arm_smc_wdt.c | 181 ++++++++++++++++++ 6 files changed, 233 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml create mode 100644 drivers/watchdog/arm_smc_wdt.c