From patchwork Thu Feb 8 10:58:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: claudiu beznea X-Patchwork-Id: 771241 Received: from mail-wr1-f45.google.com (mail-wr1-f45.google.com [209.85.221.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 45F737994E for ; Thu, 8 Feb 2024 10:58:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.45 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707389920; cv=none; b=MplF1BmOkX69JDlpWZRqNN//YQX9668Z/kWEP2IiHDcPg5L/d6O7OiFPm711NGPGA9vIhwtQGBLjHifiolFO8dU5uRSu3yG7MbTOi+XcK5bFE0H0QDZRhCnBGJBn3EyLaSLBluT2iTC5L4D7DIs5RSlv8MHdGlztvj+34oBBY5g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707389920; c=relaxed/simple; bh=NMfidsTDRu7/K1P+Tey7nNNvdvyeStoBwAN7EosPpiQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=l7alxtUo5DwWIRhK3PaHsJBLhEy2Q7dnf9klk3EpfAKpc/vGYyrbAFtDiR9/AoYpo/CNeGbZkYbfxdKFIFnZwwbb/Ybi7TuWNB+3pIU8ZW8TJT8mNlBNsL9nIUXjUZqguj4ZjAyZklIwdZrnSOx0aOogNZ9brcwB8x4uWV9m/Z0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=tuxon.dev; spf=pass smtp.mailfrom=tuxon.dev; dkim=pass (2048-bit key) header.d=tuxon.dev header.i=@tuxon.dev header.b=IInih2Ud; arc=none smtp.client-ip=209.85.221.45 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=tuxon.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=tuxon.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=tuxon.dev header.i=@tuxon.dev header.b="IInih2Ud" Received: by mail-wr1-f45.google.com with SMTP id ffacd0b85a97d-339289fead2so1172909f8f.3 for ; Thu, 08 Feb 2024 02:58:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuxon.dev; s=google; t=1707389916; x=1707994716; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=fvNVoZZzcn9RrwiNStxFGzR2YpCFWEcMy9Nh5ySh+1Q=; b=IInih2UdXQp3ADCj3i82TyAe020WQzbSFmcLcYvZBqGjIY5hQonm1Nnw35hFd3ZNlS Rb745biPJqLEwEQ5OHrzESOgVMXLLfDAKagck4hmju8s4MoG0zbGoQAiXCKiQRq0PLvK iH8aj1B59pqBbBFdV/biXTIlkxvF4YMGchnhhS4swNRZ1PfeTkfjlrv/9CwsyZdpckX2 wG3lBvXymgchN8bVTUIY4Lq3f15cq2IzXyudiXpe1qYDQDu6wmwIaSwtKUrBYBSAHF0Y 7tZEJWRBLGqGLYK2dyXjVL4tMcsSSj2qsDKKh12p02dt3mOdmfEiYU2BawffpSiJRmZK QeBw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1707389916; x=1707994716; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=fvNVoZZzcn9RrwiNStxFGzR2YpCFWEcMy9Nh5ySh+1Q=; b=QHYf+YGN8+BezmHdNH7QFyQmGL4lQf+PnagEXl6YiSa+dMgfPgRSMDJrulizpe7oNd Mi6ZwGJkrvcw38MUpky+VFLD4gzZ4Qd7/7M1uebBj/NWUGnGpneqmbu1d3v561vJUJXK oYfFikLSXT719+5U68fLWtpdU6KudpV8TS0x+ojgcLJaBM/bwFMITZly5hv4TjLHQqLj KwuawJWqVXSBMjQW2lIEoweUJf9v08chrcjoTOktA/88cD5K0Fjn5lGedkQpywl0oW8G wDHIrSYgW/uL7VOmO5a0yfrlTYmu/BLliqrt7iSGrJd5y5I3kzQBuwJhqjnma9nSz4XT +p3g== X-Gm-Message-State: AOJu0Yz3WtdvFlU89yFNd3h88CmBBEaXr7+J4vNszg1w0Y3K9gOyeJcv LdGFnLYDtZusvPLZ6PjfvQ2FDsFeXpUzag6viTGfewUCpFuBu6/sU0MjR42hR0Y= X-Google-Smtp-Source: AGHT+IHtQRRx/dV7JxwY54Vnbi7Gg/5neO7mrpQ7teFzPW5TjAfuURmQkZLbkcOUZYVNZDW0tv4j6w== X-Received: by 2002:a5d:6049:0:b0:33b:58cb:4a55 with SMTP id j9-20020a5d6049000000b0033b58cb4a55mr1039039wrt.70.1707389916607; Thu, 08 Feb 2024 02:58:36 -0800 (PST) X-Forwarded-Encrypted: i=1; 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 Received: from claudiu-X670E-Pro-RS.. ([82.78.167.45]) by smtp.gmail.com with ESMTPSA id a6-20020adffac6000000b0033b4a52bfbfsm3344153wrs.57.2024.02.08.02.58.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Feb 2024 02:58:36 -0800 (PST) From: Claudiu X-Google-Original-From: Claudiu To: wim@linux-watchdog.org, linux@roeck-us.net, robh@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, p.zabel@pengutronix.de, geert+renesas@glider.be, magnus.damm@gmail.com, biju.das.jz@bp.renesas.com Cc: linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, claudiu.beznea@tuxon.dev, Claudiu Beznea Subject: [PATCH v6 8/9] watchdog: rzg2l_wdt: Add suspend/resume support Date: Thu, 8 Feb 2024 12:58:16 +0200 Message-Id: <20240208105817.2619703-9-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240208105817.2619703-1-claudiu.beznea.uj@bp.renesas.com> References: <20240208105817.2619703-1-claudiu.beznea.uj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-watchdog@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Claudiu Beznea The RZ/G3S supports deep sleep states where power to most of the IP blocks is cut off. To ensure proper working of the watchdog when resuming from such states, the suspend function is stopping the watchdog and the resume function is starting it. There is no need to configure the watchdog in case the watchdog was stopped prior to starting suspend. Signed-off-by: Claudiu Beznea --- Changes in v6: - none Changes in v5: - none Changes in v4: - none Changes in v3: - none Changes in v2: - remove the usage of pm_ptr() drivers/watchdog/rzg2l_wdt.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/watchdog/rzg2l_wdt.c b/drivers/watchdog/rzg2l_wdt.c index 42f1d5d6f07e..c8c20cfb97a3 100644 --- a/drivers/watchdog/rzg2l_wdt.c +++ b/drivers/watchdog/rzg2l_wdt.c @@ -284,6 +284,7 @@ static int rzg2l_wdt_probe(struct platform_device *pdev) priv->wdev.timeout = WDT_DEFAULT_TIMEOUT; watchdog_set_drvdata(&priv->wdev, priv); + dev_set_drvdata(dev, priv); ret = devm_add_action_or_reset(&pdev->dev, rzg2l_wdt_pm_disable, &priv->wdev); if (ret) return ret; @@ -305,10 +306,35 @@ static const struct of_device_id rzg2l_wdt_ids[] = { }; MODULE_DEVICE_TABLE(of, rzg2l_wdt_ids); +static int rzg2l_wdt_suspend_late(struct device *dev) +{ + struct rzg2l_wdt_priv *priv = dev_get_drvdata(dev); + + if (!watchdog_active(&priv->wdev)) + return 0; + + return rzg2l_wdt_stop(&priv->wdev); +} + +static int rzg2l_wdt_resume_early(struct device *dev) +{ + struct rzg2l_wdt_priv *priv = dev_get_drvdata(dev); + + if (!watchdog_active(&priv->wdev)) + return 0; + + return rzg2l_wdt_start(&priv->wdev); +} + +static const struct dev_pm_ops rzg2l_wdt_pm_ops = { + LATE_SYSTEM_SLEEP_PM_OPS(rzg2l_wdt_suspend_late, rzg2l_wdt_resume_early) +}; + static struct platform_driver rzg2l_wdt_driver = { .driver = { .name = "rzg2l_wdt", .of_match_table = rzg2l_wdt_ids, + .pm = &rzg2l_wdt_pm_ops, }, .probe = rzg2l_wdt_probe, };