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=-9.7 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 23CA4C7618F for ; Mon, 22 Jul 2019 19:54:24 +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 E983B2229C for ; Mon, 22 Jul 2019 19:54:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="iH0in3ja"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="cFBQsyJH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E983B2229C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.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:References:In-Reply-To: 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: List-Owner; bh=NMXO8f4ZIXU3jpmzgDf0+Hbt+8hp9t99E+6iaW5IpvY=; b=iH0in3jaeGwjGQ jFKVrNo8lxi7iM00n43gWhjfRbb5aiLD6Bqaj4TpUC7u3q+coR7fthDPlZdtzPt6aNDqrcIN/1tFF EDg3DqZqJaFp337BmVxl1rFZtsnZtJojzFXrQyh5dKgo0Kc5JQMk5Ww2Por9yawq9+cj7kEjFBctY o5rLACDKjwC3M8luOMoipfjLnmy7Yw3eBVoJYN5oydN4i3Z+v07KVcZcz/g9cbEBf6eDn7bzSDMZh I45VySnJekBhgF/ikLi+cVfopEXzmzxauPO0eXsHZQDd5g/L481TVrLyq+ts4vbebjEoNy9SBENlA T3k3c/i9WfhagxXzdy3A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hpeO7-0004cS-4w; Mon, 22 Jul 2019 19:54:23 +0000 Received: from mail-wm1-x344.google.com ([2a00:1450:4864:20::344]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hpeNA-000484-59 for linux-arm-kernel@lists.infradead.org; Mon, 22 Jul 2019 19:53:26 +0000 Received: by mail-wm1-x344.google.com with SMTP id s3so36341013wms.2 for ; Mon, 22 Jul 2019 12:53:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=LSlpALgO5S3R0TyDNNvgRiZnKC8+OxLqhsNNnaICjPw=; b=cFBQsyJHHatx3JSkJdhvrebXeVJ31a0VKFML6K3ScUwBUFuvBQ6L6CZbdJ2/GdtU2N vk4kUD4CMe45B+UAU5a7Gap5p2YnMl5BbFPB12440cHBuThu0mPoBlwJ2/ja+rayW6A5 Z6jrzHt29FOd/FTRMTJuRYUn/GJMl6wf3Vl4TCGeoVStK8Tx9pthnP3b+9bAF5lAKWrg NvBzRlqP6pg/z2eZiPaQ3a9mby89HjX/sqnaedi5+odKcKymV4JWEJ7qbpRK9Cb4+0sV yJwcZzj3F807D9V9DkKi4/MLXbUWXm/mWvk87Pg+L6ue0SPJC0XB97/xXdX5uOhwyAHM ShSw== 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=LSlpALgO5S3R0TyDNNvgRiZnKC8+OxLqhsNNnaICjPw=; b=DaF47j9lhY9Rt3bw+dd0QpV53hLfT+NFg9hPTbyi2AKjNTu7bvrXS2q3KsnzpNTFWY AM3OfmcYs9MNLebMPdI93qptAqtxg29C0OrObicwAT5SA63LIVrtSQ1PdywG+iST6W1J +mj4bwDcuK+xfnw0n6iQPmAHn81BguLw2SVzFwDHUkVHsJgS/JgFAUfHXWn3eDqLktlQ l6BuPBhWmkQULX4oYLwSET55CZZez21rY8TKFUArfH6VaT453c320jHfthXKepgQSGe8 AZGaD/hP/0tkgfWShzz30leR/tl6uQ6iqd9Zu/osPlpiA+SzlqlislZ9+LRZvVSKTgGm 5MVQ== X-Gm-Message-State: APjAAAX86HyNVQcOhyMXLVOiF7lG76EvjOTXd2sRwX+7YCC5LabHaJqm I/KPpAJplH6dKzQj/Vpzz9k= X-Google-Smtp-Source: APXvYqz85kfxUOA8R7vP4BPYFKPdWETr5bWy98ysJmybNus/vONpVvl7FJFmHS4slzONzL2fYE0sUg== X-Received: by 2002:a7b:c947:: with SMTP id i7mr67082094wml.77.1563825202676; Mon, 22 Jul 2019 12:53:22 -0700 (PDT) Received: from localhost.localdomain (nat-113.starnet.cz. [178.255.168.113]) by smtp.googlemail.com with ESMTPSA id c65sm37382975wma.44.2019.07.22.12.53.21 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 22 Jul 2019 12:53:22 -0700 (PDT) From: Evgeny Kolesnikov To: Subject: [PATCH 2/5] power: reset: Add UART-based MCU restart DT bindings Date: Mon, 22 Jul 2019 21:53:02 +0200 Message-Id: <98b32aebe39a7b6b3ace1c2ef6f51428e8284946.1563822216.git.evgenyz@gmail.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190722_125324_390917_FD8ABB38 X-CRM114-Status: GOOD ( 13.93 ) 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 , Andrew Lunn , Jason Cooper , linux-pm@vger.kernel.org, Gregory Clement , Sebastian Reichel , Evgeny Kolesnikov , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Rob Herring , linux-arm-kernel@lists.infradead.org, Sebastian Hesselbarth Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org This adds device tree bindings of the restart driver for power managing micro controller units that are connected to a board via the UART interface. Signed-off-by: Evgeny Kolesnikov --- .../bindings/power/reset/uart-restart.txt | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/reset/uart-restart.txt diff --git a/Documentation/devicetree/bindings/power/reset/uart-restart.txt b/Documentation/devicetree/bindings/power/reset/uart-restart.txt new file mode 100644 index 000000000000..bf831d9bdff8 --- /dev/null +++ b/Documentation/devicetree/bindings/power/reset/uart-restart.txt @@ -0,0 +1,39 @@ +* UART-based PM MCU restart driver + +Some devices have a microcontroller controlling the main power +supply. This microcontroller is connected to UART of the SoC. +Sending a sequence of characters tells the MCU to reset the SoC +and/or MCU itself. + +The length of the sequence, baud rate and the timeout to process +the command may vary from device to device. + +This driver could be used for WD My Cloud (Marvell SoCs), QNAP +(Kirkwood and Orion5x SoCs) and Synology NAS devices. + +Required properties: +- compatible: Should be "uart-restart" +- reg: Address and length of the register set for UART +- clocks: The tclk clock +- cmd: Array of bytes, the command to send to the MCU +- baud: Baud rate [75..460800] + +Optional properties: +- byte-delay: A delay after each byte of a command, could be useful + for sloppy MCUs [ms], default value is 5 +- timeout: A timeout to wait for the MCU to process the command [ms], + default value is 1000 +- override: Boolean flag that indicates if the driver should + prioritize itself over any existing restart driver, + default behaviour is not to interfere + +Example: + restart@12100 { + compatible = "uart-restart"; + reg = <0x12100 0x100>; + clocks = <&coreclk 0>; + baud = <19200>; + cmd = [fa 03 03 02 00 00 fb]; + override; + status = "okay"; + }; -- 2.21.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel