From patchwork Thu Feb 25 18:31:38 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sylvain Lemieux X-Patchwork-Id: 8425831 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 66BE29F52D for ; Thu, 25 Feb 2016 18:35:39 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 67998202B8 for ; Thu, 25 Feb 2016 18:35:38 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A42E1201BC for ; Thu, 25 Feb 2016 18:35:37 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1aZ0jc-0001kP-8O; Thu, 25 Feb 2016 18:33:56 +0000 Received: from mail-io0-x242.google.com ([2607:f8b0:4001:c06::242]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1aZ0i3-0000VR-Pp for linux-arm-kernel@lists.infradead.org; Thu, 25 Feb 2016 18:32:23 +0000 Received: by mail-io0-x242.google.com with SMTP id b188so6393637iof.3 for ; Thu, 25 Feb 2016 10:31:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=lyYHpb+DtKCqjg0TDmRpdPAqS5dQbZ5efxDt+FA/kt8=; b=y7KlQlx2CQso9ETK1qV1DfMdTYpeQ8EZcNa2gz/ovGLaRoeCNadSC+IU1UfXRrFCUc gSMTgZmlqQUmjvbZp2WjXg1Bx0O3b72EKHvg9TEhcqhWnLlxlgQQqg/d0klD7TwrzjJi DPsAy3Q+lkd/B5zbq3YasguUdRZp00X+S5CamF1IH2FIvFAb3u0XKmxVXqavD923QBFg VIqSgwujcQJs7lxgbL7U2ZAZ1lyeERcvC6T62Tfo0Bc1kdy+cUSwUWcNTzUFMAPFeMLK R+LmLiV7auJlwdWQJyXTIYim6QxcnfzmggTXfCb+R8Zmf3jq8/xsc64N/Alhkowwjez1 1TUA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=lyYHpb+DtKCqjg0TDmRpdPAqS5dQbZ5efxDt+FA/kt8=; b=ekNTgtwSE17+HN4wmYnj31RRg9BqylVbBwajXq4OVjNS4pi98RBpEjCnj4bguzGsNy 97Nj6+HfVNY3sJY8/eAu8AFouscwWiplV95sg7fYYvogt1ElnQ4T5QKYSC+iCHg1Wd+k BaAgQWT0cDvYen6mq/Gtlj2VhR7XCqLNz5Ii+CyyiFpmwCrwqeW3wWq9nMQ1KrpCWnih Wng6MVHc+122bjhBTkF5CgqeifZ6AxsaN8/InnieDVrEXh43DGk1oBESTF1CgqMrJBaY JLDtIu3sDLGVdXAPzwf4ZDO0cMmTTIAVQiK+IHYgU94zyy+F8dmAcenHcpC67nzxxMrx 1CKg== X-Gm-Message-State: AG10YOTK9EU04ZBuJNb4NnD3iCZ0dSVcBYyE7l6QEBihJmfD/MGC9p39y3Alsi+3B5u6hA== X-Received: by 10.107.136.210 with SMTP id s79mr4516701ioi.50.1456425119015; Thu, 25 Feb 2016 10:31:59 -0800 (PST) Received: from CABRO3AP00510.americas.tsp.ad ([74.51.240.241]) by smtp.gmail.com with ESMTPSA id qa4sm1736299igb.14.2016.02.25.10.31.57 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 25 Feb 2016 10:31:57 -0800 (PST) From: Sylvain Lemieux To: linux-arm-kernel@lists.infradead.org, arnd@arndb.de, wim@iguana.be, manabian@gmail.com Subject: [PATCH v4 4/6] watchdog: pnx4008: restart: support "cmd" from userspace Date: Thu, 25 Feb 2016 13:31:38 -0500 Message-Id: <1456425100-28136-5-git-send-email-slemieux.tyco@gmail.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1456425100-28136-1-git-send-email-slemieux.tyco@gmail.com> References: <1456425100-28136-1-git-send-email-slemieux.tyco@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160225_103220_154424_E1E1DAB8 X-CRM114-Status: GOOD ( 13.78 ) X-Spam-Score: -1.2 (-) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: stigge@antcom.de, linux-watchdog@vger.kernel.org, linux@roeck-us.net, vz@mleia.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-1.0 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_SORBS_WEB, UNPARSEABLE_RELAY autolearn=no version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Sylvain Lemieux Added support to verify if a "cmd" is passed from the userspace program rebooting the system; - if a valid "cmd" is available, handle it; - If the received "cmd" is not supported, use the default reboot mode. Signed-off-by: Sylvain Lemieux --- Changes from v3 to v4: - none. Changes from v2 to v3: - no logical change; updated to work with new revision of patch #2. Changes from v1 to v2: - Rename patch title; was "arm: lpc32xx: restart: support "cmd" from userspace" - Add change to "pnx-4008" driver instead of "mach-lpc32xx". drivers/watchdog/pnx4008_wdt.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/watchdog/pnx4008_wdt.c b/drivers/watchdog/pnx4008_wdt.c index fbf027e..e97b611 100644 --- a/drivers/watchdog/pnx4008_wdt.c +++ b/drivers/watchdog/pnx4008_wdt.c @@ -130,6 +130,21 @@ static int pnx4008_wdt_set_timeout(struct watchdog_device *wdd, static int pnx4008_restart_handler(struct notifier_block *this, unsigned long mode, void *cmd) { + const char *boot_cmd = (const char *)cmd; + + /* + * Verify if a "cmd" passed from the userspace program rebooting + * the system; if available, handle it. + * - For details, see the 'reboot' syscall in kernel/reboot.c + * - If the received "cmd" is not supported, use the default mode. + */ + if (boot_cmd) { + if (boot_cmd[0] == 'h') + mode = (unsigned long)REBOOT_HARD; + else if (boot_cmd[0] == 's') + mode = (unsigned long)REBOOT_SOFT; + } + if (mode == (unsigned long)REBOOT_SOFT) { /* Force match output active */ writel(EXT_MATCH0, WDTIM_EMR(wdt_base));