From patchwork Thu Apr 23 04:40:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Evan Benn X-Patchwork-Id: 201613 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 B2DBEC2BA19 for ; Thu, 23 Apr 2020 04:40:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 83F882071C for ; Thu, 23 Apr 2020 04:40:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="OBKz8WU3" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726166AbgDWEk7 (ORCPT ); Thu, 23 Apr 2020 00:40:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36750 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1725562AbgDWEk6 (ORCPT ); Thu, 23 Apr 2020 00:40:58 -0400 Received: from mail-pj1-x1041.google.com (mail-pj1-x1041.google.com [IPv6:2607:f8b0:4864:20::1041]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 428A0C03C1AB for ; Wed, 22 Apr 2020 21:40:58 -0700 (PDT) Received: by mail-pj1-x1041.google.com with SMTP id hi11so1893675pjb.3 for ; Wed, 22 Apr 2020 21:40:58 -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:in-reply-to:references :mime-version:content-transfer-encoding; bh=uN77YYlhJ5hf5xvmhs+g80JKk6JqfP0Ww5cfVFBntyA=; b=OBKz8WU3m2vuOji78QzwgsVP51H136YvPgEt8OdzYI5V0ySedVeDWeLmfPw9h92OY/ IUyMqjuDX1rZ/U885DafqHcLuVbO3hEipQ85nfmZ136gz6TaZJ5LD66MNvarzx/HhEGP HUCsZWn4OBRhCY6NPynsV9afwfjhe6mP7qrvU= 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=uN77YYlhJ5hf5xvmhs+g80JKk6JqfP0Ww5cfVFBntyA=; b=FjvMw3gFN+YmWL3Ee8y/pB/acX0coNU4j5zayiwta8LsADI7OWT8q8GKnblKkkJpF/ T8eOdcpjTDiC3UHuLP8ozAQqX6SRxHjt+WJvHtsmiezLX57A1SkPBcstLbre6vjo4TxF pZZ9WskM1icaPWOjeIPSDLYT8qafPOFrylKGuoaWWevBj6yJivhwqFgqOC7B0+IFaHhx DjWBnWKP3cbDbKqnGls7gf/Jbfb92VmvSf6jpKXy2rD0/wQ0KyLVcr4IddQu/GO2K3h2 +aHOY79sC99/4ArZ2jLoNx8fwKnrMJ+on2+jEhLXGVOwYPH8WPcIPhBO7huNCJ353shg QqnQ== X-Gm-Message-State: AGi0PuZc2Y27m11Ev9TU+hiz72QQzQSbJeM8LFgE0sjalSAog0bvcAl/ +FLdJZCISyZh/xO0+0FzMuFW1Q== X-Google-Smtp-Source: APiQypJzMoQkS2ozRE2GCKP0wjVVWrTqFAkBGUh8NTNQPCqzgFzatpMLual9HScnLyqtJPK8puazfg== X-Received: by 2002:a17:902:8213:: with SMTP id x19mr2102986pln.86.1587616857814; Wed, 22 Apr 2020 21:40:57 -0700 (PDT) Received: from localhost ([2401:fa00:9:14:1105:3e8a:838d:e326]) by smtp.gmail.com with ESMTPSA id b15sm1211210pfd.139.2020.04.22.21.40.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 22 Apr 2020 21:40:57 -0700 (PDT) From: Evan Benn To: LKML Cc: jwerner@chromium.org, xingyu.chen@amlogic.com, Evan Benn , "David S. Miller" , Greg Kroah-Hartman , Guenter Roeck , Mauro Carvalho Chehab , Rob Herring , Wim Van Sebroeck , devicetree@vger.kernel.org, linux-watchdog@vger.kernel.org Subject: [PATCH v5 1/2] dt-bindings: watchdog: Add ARM smc wdt for mt8173 watchdog Date: Thu, 23 Apr 2020 14:40:35 +1000 Message-Id: <20200423143945.v5.1.Id96574f1f52479d7a2f3b866b8a0552ab8c03d7f@changeid> X-Mailer: git-send-email 2.26.2.303.gf8c07b1a785-goog In-Reply-To: <20200423044036.234578-1-evanbenn@chromium.org> References: <20200423044036.234578-1-evanbenn@chromium.org> MIME-Version: 1.0 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This watchdog can be used on ARM systems with a Secure Monitor firmware to forward watchdog operations to firmware via a Secure Monitor Call. Signed-off-by: Evan Benn --- Changes in v5: - Change compatible to arm,smc-wdt Changes in v4: - Add arm,smc-id property Changes in v3: - Change name back to arm Changes in v2: - Change name arm > mt8173 .../bindings/watchdog/arm-smc-wdt.yaml | 36 +++++++++++++++++++ MAINTAINERS | 6 ++++ 2 files changed, 42 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml diff --git a/Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml b/Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml new file mode 100644 index 0000000000000..0ee39aa3be027 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml @@ -0,0 +1,36 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/arm-smc-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ARM Secure Monitor Call based watchdog + +allOf: + - $ref: "watchdog.yaml#" + +maintainers: + - Julius Werner + +properties: + compatible: + enum: + - arm,smc-wdt + arm,smc-id: + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + - default: 0x82003D06 + description: + The ATF smc function id used by the firmware. + +required: + - compatible + +examples: + - | + watchdog { + compatible = "arm,smc-wdt"; + timeout-sec = <15>; + }; + +... diff --git a/MAINTAINERS b/MAINTAINERS index b816a453b10eb..0f2b39767bfa9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1457,6 +1457,12 @@ S: Maintained F: Documentation/devicetree/bindings/interrupt-controller/arm,vic.txt F: drivers/irqchip/irq-vic.c +ARM SMC WATCHDOG DRIVER +M: Julius Werner +R: Evan Benn +S: Maintained +F: devicetree/bindings/watchdog/arm-smc-wdt.yaml + ARM SMMU DRIVERS M: Will Deacon R: Robin Murphy