From patchwork Mon Nov 22 01:32:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Linus Walleij X-Patchwork-Id: 517804 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 994FDC433F5 for ; Mon, 22 Nov 2021 01:35:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229920AbhKVBiH (ORCPT ); Sun, 21 Nov 2021 20:38:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42756 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229594AbhKVBiH (ORCPT ); Sun, 21 Nov 2021 20:38:07 -0500 Received: from mail-lf1-x133.google.com (mail-lf1-x133.google.com [IPv6:2a00:1450:4864:20::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 74327C061574 for ; Sun, 21 Nov 2021 17:35:01 -0800 (PST) Received: by mail-lf1-x133.google.com with SMTP id b1so72760123lfs.13 for ; Sun, 21 Nov 2021 17:35:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=dH9DwZsMEmHuADMJdo4bZJF+nskxTaX3+w96Fu8Zmrw=; b=SzHtP3jFeptXwLMSzeIqR/YmhLeC2HEaDV32ayeKCejNlHSAfE6L95xf5ng14MtPmD 6O1NFb0zB5bFhGN3d803jezwvTDylrxwdRrciuYZBqRsuOdFIVZ1v6Cj54DHOpKn5tM1 OsmOe2WQQeaRKIy9IdGcwoGiTyRWVsI/sH+oyLuciMV82yabbpsxugO1lqglEWNN9TIs N50NM2HSRcgZmdyeTbStsAIHcuU4WUmEqL2n4T/bxev0yZweD6Fh3IOxu5pAqj19VdpN xJlQj86My+cSnGk+vxozKMJSYZ5kwLUdf9U6vu4hGTJGWmZtSWS3CorPQFaQHc71WpUh VDgQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=dH9DwZsMEmHuADMJdo4bZJF+nskxTaX3+w96Fu8Zmrw=; b=X7HAai2bJoEdbsFBOayAa5KD9YDacK3k2rA8q2GkgKXFr5+L13l3odEI343mRorRaS RtCEQ8CroHyUMEwRlukAv6HTu328lVpfyolaw4mX+t6o8mU9x0v9hjvPBGBn13aV7NT1 WpFHo+4vHGY71FH5dxOwsKHdXNLT3a8k8wnXBDyK+032W64V3y8Qz/t+9bIloyNQgjY9 jVXIlNDmSBwzk15TohNOULT9X2VUgnOgIWowqZHX1zu0flNCxRpBt33a7GoUtoU3PlqY t4QKo3UUH9Dy2G8G2au1dUGe5f0ODZt/aZAnL8bG7m4npTSEZL22pHVK+lvahn1BhLhb fd6A== X-Gm-Message-State: AOAM53317Mu0nbuTMIJ6grbpvSjCbI+mhggWiamTB7VU6CJrBgzhaK+z am5P9cbnoM5yU79OrVkg8lz/jw== X-Google-Smtp-Source: ABdhPJxOJlYOHdA37LZHSXsmfEf67Q40BqXrNLWY6pbN/d1KL4gUSwng4voYr+hAVfAtULwc3r6WBw== X-Received: by 2002:a05:6512:31cf:: with SMTP id j15mr53703985lfe.229.1637544899830; Sun, 21 Nov 2021 17:34:59 -0800 (PST) Received: from localhost.localdomain (c-fdcc225c.014-348-6c756e10.bbcust.telenor.se. [92.34.204.253]) by smtp.gmail.com with ESMTPSA id bp15sm798579lfb.176.2021.11.21.17.34.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Nov 2021 17:34:58 -0800 (PST) From: Linus Walleij To: Wim Van Sebroeck , Guenter Roeck Cc: linux-watchdog@vger.kernel.org, Linus Walleij Subject: [PATCH] watchdog: ixp4xx: Implement restart Date: Mon, 22 Nov 2021 02:32:56 +0100 Message-Id: <20211122013256.3050966-1-linus.walleij@linaro.org> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Implement watchdog restart in the IXP4xx watchdog timer. Signed-off-by: Linus Walleij --- drivers/watchdog/ixp4xx_wdt.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/watchdog/ixp4xx_wdt.c b/drivers/watchdog/ixp4xx_wdt.c index 31b03fa71341..7b188591f6d4 100644 --- a/drivers/watchdog/ixp4xx_wdt.c +++ b/drivers/watchdog/ixp4xx_wdt.c @@ -18,6 +18,7 @@ #include #include #include +#include #include struct ixp4xx_wdt { @@ -84,10 +85,25 @@ static int ixp4xx_wdt_set_timeout(struct watchdog_device *wdd, return 0; } +static int ixp4xx_wdt_restart(struct watchdog_device *wdd, + unsigned long action, void *data) +{ + struct ixp4xx_wdt *iwdt = to_ixp4xx_wdt(wdd); + + __raw_writel(IXP4XX_WDT_KEY, iwdt->base + IXP4XX_OSWK_OFFSET); + __raw_writel(0, iwdt->base + IXP4XX_OSWT_OFFSET); + __raw_writel(IXP4XX_WDT_COUNT_ENABLE | IXP4XX_WDT_RESET_ENABLE, + iwdt->base + IXP4XX_OSWE_OFFSET); + msleep(1000); + + return 0; +} + static const struct watchdog_ops ixp4xx_wdt_ops = { .start = ixp4xx_wdt_start, .stop = ixp4xx_wdt_stop, .set_timeout = ixp4xx_wdt_set_timeout, + .restart = ixp4xx_wdt_restart, .owner = THIS_MODULE, };