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[23.128.96.18]) by mx.google.com with ESMTP id g13si12513764edu.140.2021.05.10.06.30.12; Mon, 10 May 2021 06:30:36 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=canonical.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240905AbhEJNXQ (ORCPT + 99 others); Mon, 10 May 2021 09:23:16 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:44919 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240565AbhEJNS0 (ORCPT ); Mon, 10 May 2021 09:18:26 -0400 Received: from mail-ej1-f72.google.com ([209.85.218.72]) by youngberry.canonical.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.93) (envelope-from ) id 1lg5mc-0008VB-9E for linux-kernel@vger.kernel.org; Mon, 10 May 2021 13:17:14 +0000 Received: by mail-ej1-f72.google.com with SMTP id k9-20020a17090646c9b029039d323bd239so4721136ejs.16 for ; Mon, 10 May 2021 06:17:14 -0700 (PDT) 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=vG3tTWsmMu3oqxb/plnA4yFpnSWfUCGEOED97VmRmp4=; b=NY/VxLxuaw2ehto2gWWGKqBrP6Zq+OJXt0t78pq0eIEDTzVmQepp3HqujaybDpvaJf R84VrTPEnuF83JQcHQu17EqCg0ptwH0zmNQAT9zdg1Ck0tTFRSDLgR00mJiSBVLW4UoR vaoxzraEEDZ5UP+auwH7YSIxdxGLM6dtKllp0pSpNYgpoRRzE+5p28Kpy/CKDB02fyQP C3Qhu7Mf2Zf4TwszjJsuJ+z+YrZ++cRPUcU3rn8Bv71nIRvDqYh3ddYdkhCh3Op/UNSz pUH5Ot/MTyAKIk0P0I4qv8B6KVcPiJzG35BxtZAFCi992K5CohhCIX7K6//rPmz5wE0J 6qEA== X-Gm-Message-State: AOAM531+R5wE2wDAhhJbV4WMwin4N+CG3iW971mCQfUR+wQ3mn2fHxoM siINXY6AdxLhjedJXGBTHYWqS/AQAKp6szIEYKXYshVg3JyoEbnE5VmZD3z1IqbS8z6NFjXsd9A MxJJYnYZ6MBXVz+G6h1EXnaDh/qBqGq57VycFuUjR1Q== X-Received: by 2002:aa7:c150:: with SMTP id r16mr28881483edp.82.1620652634046; Mon, 10 May 2021 06:17:14 -0700 (PDT) X-Received: by 2002:aa7:c150:: with SMTP id r16mr28881458edp.82.1620652633840; Mon, 10 May 2021 06:17:13 -0700 (PDT) Received: from gollum.fritz.box ([194.191.244.86]) by smtp.gmail.com with ESMTPSA id b21sm9116750ejg.80.2021.05.10.06.17.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 May 2021 06:17:13 -0700 (PDT) From: Juerg Haefliger X-Google-Original-From: Juerg Haefliger To: wim@linux-watchdog.org, linux@roeck-us.net, linux-watchdog@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Juerg Haefliger Subject: [PATCH] watchdog: Add {min,max}_timeout sysfs nodes Date: Mon, 10 May 2021 15:16:25 +0200 Message-Id: <20210510131625.21506-1-juergh@canonical.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The valid range for the 'timeout' value is useful information so expose the min and max timeout values via sysfs. Signed-off-by: Juerg Haefliger --- drivers/watchdog/watchdog_dev.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c index 2946f3a63110..b84d53a79618 100644 --- a/drivers/watchdog/watchdog_dev.c +++ b/drivers/watchdog/watchdog_dev.c @@ -525,6 +525,24 @@ static ssize_t timeout_show(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR_RO(timeout); +static ssize_t min_timeout_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct watchdog_device *wdd = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", wdd->min_timeout); +} +static DEVICE_ATTR_RO(min_timeout); + +static ssize_t max_timeout_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct watchdog_device *wdd = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", wdd->max_timeout); +} +static DEVICE_ATTR_RO(max_timeout); + static ssize_t pretimeout_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -609,6 +627,8 @@ static struct attribute *wdt_attrs[] = { &dev_attr_state.attr, &dev_attr_identity.attr, &dev_attr_timeout.attr, + &dev_attr_min_timeout.attr, + &dev_attr_max_timeout.attr, &dev_attr_pretimeout.attr, &dev_attr_timeleft.attr, &dev_attr_bootstatus.attr, -- 2.27.0