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=-3.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no 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 B28C2C3B196 for ; Fri, 14 Feb 2020 06:26:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 89D152187F for ; Fri, 14 Feb 2020 06:26:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="f3T6NdVH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728820AbgBNG0w (ORCPT ); Fri, 14 Feb 2020 01:26:52 -0500 Received: from mail-pj1-f68.google.com ([209.85.216.68]:35760 "EHLO mail-pj1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728807AbgBNG0u (ORCPT ); Fri, 14 Feb 2020 01:26:50 -0500 Received: by mail-pj1-f68.google.com with SMTP id q39so3507462pjc.0 for ; Thu, 13 Feb 2020 22:26:50 -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=eCrhZ74+BntL1ASmsZknwx81NOpQkF74lLsvD9sBub0=; b=f3T6NdVHZxNDFtYQX+iekyEp0Bj2gxg4PzjB4yrO524wQr2gUIHTtFAGcvT0x+wfxY xgHw8Oc7tgN48emrBRNtwlfgTheC5sPIifAvxhb1VHFp42qc5buBVrLVuqMTscO3BeVg gMN5M9wfjGBaooPpixSwRakGOYGWDa2gtcbaE= 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=eCrhZ74+BntL1ASmsZknwx81NOpQkF74lLsvD9sBub0=; b=bRZrMr7hbOm6B8mnWbXQZINiQjU9TPzNwAFy14mBs+SPdSBdDKG6iS+CA0xfErAMSA A9o2jWA8XISzX/rHX2WwHY9NZYSDCm+uhi59wtDsIr3D1NnM5ihg/CHMc9/DXHY4qjGq KbA9BXX1v1xvYMIsf90ApQWSD5fqUyMcGR2aRKbLHlhda+Xy3klrFVxl3yLkzWoOOe9R f3UV0XQQRBJQ5stNEKPjelOZdZjCzCfzG8MDvv3XjmYUuvlE3cFyxuiHuV36p2BMlHdX +ur2L9hs8tkniR+WARTB+zx+2t8K3C1kN0FszYjKuIoKI07xTlrxM/4f8WGOdapeq7WG TehQ== X-Gm-Message-State: APjAAAVlQfMESryDRMWjsUCfn9mhhJLuH3vLpQVW7ienxxSokLi8Jjdm VydmqpMqJG9/bfqVmFGCrGQDEPpsqEdGFw== X-Google-Smtp-Source: APXvYqyn5ehjzmo5Eos0aPWzc2ZSt6d7nE5vtqIbR/GyaAShL8VPgieCBvCjTwVgiNarWUm9OnDtxg== X-Received: by 2002:a17:90a:9dc3:: with SMTP id x3mr1620345pjv.45.1581661609563; Thu, 13 Feb 2020 22:26:49 -0800 (PST) Received: from localhost ([2401:fa00:9:14:1105:3e8a:838d:e326]) by smtp.gmail.com with ESMTPSA id o73sm4636778pje.7.2020.02.13.22.26.41 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 13 Feb 2020 22:26:48 -0800 (PST) From: Evan Benn To: LKML Cc: jwerner@chromium.org, Evan Benn , Bjorn Andersson , Guenter Roeck , Mauro Carvalho Chehab , Rob Herring , Marcin Juszkiewicz , Catalin Marinas , Olof Johansson , Leonard Crestez , Jonathan Cameron , Dinh Nguyen , Shawn Guo , Greg Kroah-Hartman , devicetree@vger.kernel.org, Will Deacon , linux-watchdog@vger.kernel.org, Rob Herring , Wim Van Sebroeck , =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= , linux-arm-kernel@lists.infradead.org, "David S. Miller" , Mark Rutland , Anson Huang Subject: [PATCH 0/2] Add a watchdog driver that uses ARM Secure Monitor Calls. Date: Fri, 14 Feb 2020 17:26:35 +1100 Message-Id: <20200214062637.216209-1-evanbenn@chromium.org> X-Mailer: git-send-email 2.25.0.265.gbab2e86ba0-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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. Evan Benn (1): dt-bindings: watchdog: Add arm,smc-wdt watchdog arm,smc-wdt compatible Julius Werner (1): watchdog: Add new arm_smc_wdt watchdog driver .../bindings/watchdog/arm,smc-wdt.yaml | 30 +++ MAINTAINERS | 7 + arch/arm64/configs/defconfig | 1 + drivers/watchdog/Kconfig | 12 ++ drivers/watchdog/Makefile | 1 + drivers/watchdog/arm_smc_wdt.c | 191 ++++++++++++++++++ 6 files changed, 242 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/arm,smc-wdt.yaml create mode 100644 drivers/watchdog/arm_smc_wdt.c -- 2.25.0.265.gbab2e86ba0-goog