From patchwork Tue Feb 6 07:51:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudiu X-Patchwork-Id: 770585 Received: from mail-wm1-f46.google.com (mail-wm1-f46.google.com [209.85.128.46]) (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 C3AAE12C814 for ; Tue, 6 Feb 2024 07:52:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.46 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707205944; cv=none; b=f9OQMkSItUfRbfYedP8xVyIc+jaPj9HTeS+bNdy1wpVs7BDe6DIY0ZgfkzCNmBr5ht5NrUIYaAAOU00zIfiaAMnW0S9elbOt8PRlipr5FS1roaOM5lSCL9F9Nzrxdxp0esdxil5YOtsBspBgJRU6m5fpTVC6s/95bDR4P7QFDuM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707205944; c=relaxed/simple; bh=J/XvStBpKipy73l5We0jwaSeE533ZzXJ5uwYDD0Q1C0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=WHMXeVt0BkZg8bDg4ZRCPaJ+yW+o9Jvl9kBPlF7sFAmRZfrzgV86/0nLuLFnFeZEhG1FmeycYrhRGjSPil/IDsnm7nOt4ZA9nBIw7r4CTGrTOrt4qHbE51USXal7FGy2nr9clRBvtbbxewl6jSJkryTcQSZ5rDP3BqJQ9ZqkoAU= 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=MgiQahuv; arc=none smtp.client-ip=209.85.128.46 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="MgiQahuv" Received: by mail-wm1-f46.google.com with SMTP id 5b1f17b1804b1-40fd2f7ef55so1312805e9.0 for ; Mon, 05 Feb 2024 23:52:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuxon.dev; s=google; t=1707205941; x=1707810741; 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=8RwoclSKr0jTPCLza6NnyZdnbSE3Er/n2jlH8URKPyo=; b=MgiQahuvDBK3YkvCjYwsAabnAXEtnGxhhRVLP4UisGUyauKfc+hj0h/WhvmK52uGgm pTCl8LkLk9ZQR5f7Ajkio2Xzz8fyr+F6p/WD33/jXOxQQWdwn/xT0/sOrc7rOHNsXovm ujKujXjsCIBDKPXr+SBCg0UDlQa78UR1okcPv7uasPXkge4uFGwpV7loQlSf8uNIYi5g DyvDkiBe9bLmZgyysIVIQO3JlxYh3tT5ZUF4hwL9pZTBjWvW9vTgBVC8kA+ozsTP9gbW Pt7/nw/QSMJ1DhDgvSgpLVSaNxBve0ULexBV5bzc8C8uAhAXJ5p+f0k9hp90OkvPy/h6 wW6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1707205941; x=1707810741; 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=8RwoclSKr0jTPCLza6NnyZdnbSE3Er/n2jlH8URKPyo=; b=jdBKkPLk2ilV4C+e4dt9bdXU/m60WFNkfgKiAtT2cuoi7M9JColm3jqO3Dtie6aa6i UWizqz9HsnyaiW91NBgLzd0rVv8ZIkfyZOa3VZQO0G1/wg5UBw7TOjZQOgoIdbZueCIE UhJSkHNq0D1yzhASI5C/qDje94ROYQlPr+mknMLVUFENSBZltzG54iusN2akeKurTLdQ 8xTaMmaHIw9loHrQuoVY4vnHWgnv6/bhRk+2kQfjTbssj/s5Db0E8dJ/GBnDjQwBChE5 k6C8vtt3zLsM4pUpTgmUN8fd/KkLEX4ItS/TOsuHoAXSgQ1nzJWFOmP4sl8/AFl7Ws6c c3KA== X-Gm-Message-State: AOJu0Yyc5BhFu6R/43dvl+9zK02Y99V/c3OjQUw2WO5cmiI3PEypMvEs flKkNEUFKw4rsBvqq9eLQSGmXL5uXxqF1ho5izF7AcKzP8ajRywGy0VF/dpRONc= X-Google-Smtp-Source: AGHT+IHTIHxy+NKS2mQrn/SyH9wuwDfTsMFo2cxO4LKyOcngCy5BnycZR64LOXpCks+S6Bt0zqfP4A== X-Received: by 2002:a05:600c:1c84:b0:40e:8655:d48f with SMTP id k4-20020a05600c1c8400b0040e8655d48fmr6042770wms.11.1707205941216; Mon, 05 Feb 2024 23:52:21 -0800 (PST) X-Forwarded-Encrypted: i=1; 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 Received: from claudiu-X670E-Pro-RS.. ([82.78.167.154]) by smtp.gmail.com with ESMTPSA id j32-20020a05600c1c2000b0040fbad272f6sm1106843wms.46.2024.02.05.23.52.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Feb 2024 23:52:20 -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 v4 8/9] watchdog: rzg2l_wdt: Add suspend/resume support Date: Tue, 6 Feb 2024 09:51:48 +0200 Message-Id: <20240206075149.864996-9-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240206075149.864996-1-claudiu.beznea.uj@bp.renesas.com> References: <20240206075149.864996-1-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 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, };