From patchwork Fri Feb 2 07:58:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: claudiu beznea X-Patchwork-Id: 769474 Received: from mail-ej1-f54.google.com (mail-ej1-f54.google.com [209.85.218.54]) (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 9C63C19473 for ; Fri, 2 Feb 2024 07:59:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.54 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706860753; cv=none; b=ZaAE4fL21KCSSqedF8vtlCU1rz6Id5zdtBzULDk0ITQGQK5JzcDIziSGbroJDzqYrRsIjLpJm5quKA3bIsQwAeAb+3SE9N1JgIAY7l+Bl7Yf1atVJRZodSwtHCGDhdAUrm/S1WH5ArlnWkLYICPOnclHbaZgVSppDd8gmJkP9mk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706860753; c=relaxed/simple; bh=aIf+Pu3HweWyoN7lkEi0qmM7OKFln8UmJUtFm6v0tPY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Dm4aCfICiXNHudQT0K2DuFmz2hqKwSelXun/1y8wG29iJckGCflIsnvpFirwQ2elzn1bqlzjQLek/gNtvgd58TK2uCm0W7N1rpDV9me/ZLU+PvI+0yzuuQbCHUNy4yoYo+QpRuRX0ZfcKZ3wCoKH//8H0Op23iLnCl2R1N05PJE= 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=qoLWx8sz; arc=none smtp.client-ip=209.85.218.54 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="qoLWx8sz" Received: by mail-ej1-f54.google.com with SMTP id a640c23a62f3a-a2d7e2e7fe0so97530266b.1 for ; Thu, 01 Feb 2024 23:59:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuxon.dev; s=google; t=1706860750; x=1707465550; 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=MfVK6XRPMqlFzKP2qmkaBnCxYUhq6mpRwszPVemjL+4=; b=qoLWx8szTmDZp5TRODdR6Qx83EhCkW+N0soKhIHX0XAqzKfNH/Jc5N8CJ8iQjTSeUm Z2IilCA+rB8w96hDx0wigUmd8dpuzHXNEIOPyjYbf1x3ya6exASz1UcvPxxCBAwexQyv /gmP4CR0N6KTzOgboaTSehsLziQYw2aDlpmxJS0W4ZVj23KafyfID0KKaCa7zXbqsun3 u3DAydbbbH8PGeAVimVYfznHD3TPbRavsvG80w2qg1eY+cP2QSFxEuwfa3O5H4QM0Xd2 iVBS5zqH/tOc31//CHKAUBjj9Wk0W66/y35GwhNPVhRhaPF7Q4hd6z1ws5AAKyw+gQFy tIYA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1706860750; x=1707465550; 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=MfVK6XRPMqlFzKP2qmkaBnCxYUhq6mpRwszPVemjL+4=; b=fb8ncnBzAenJbpZfbPH+p0t5cRfrg7t3s9NlZXcid98X195rrae27H7OvVMfb7Lxk1 4EUXb10HcRhbK5A2tjZqD8KN8OQn5Mzf0VOEOYnqbFV4/+lHAeRW/C4Yma1+Zc5YN1A0 0+I8e/MjLzeW0aLYrOjg6bi3FNy0HmfXLqEdT9GwO/pJXcDJi2Ips2wusioXWniv9Hkg QyDxgd160C/1pYi4GVm9hAu25QWvMiE/gvC9mAHKeQoomsipZFwyHkIYU9zOCfPmgjAp v7GuzJH5a5RfEyfIBZz2EKfhAXSrUimuFFa8vR78G4KFOIoitsuBrIDyLctt++xB6XUX WsUQ== X-Gm-Message-State: AOJu0YzGl6M2vngywejWTKfws6WU114yESXw/3kRQC6Bsfbo9zK00uW5 2GW//HrFkbhR4k3csSwR0dDWDYxzq+tqUibzxjlUwJwhJ8iFXpbTqA9P6IPX+Hk= X-Google-Smtp-Source: AGHT+IE4olcKoazqFZk62MlgJKknx3xWnlOExmjvhxqFfby5JxnaP+LFDhARqT301OXiFGYyahONnw== X-Received: by 2002:a17:906:cb8b:b0:a35:a12f:e363 with SMTP id mf11-20020a170906cb8b00b00a35a12fe363mr1047795ejb.10.1706860749862; Thu, 01 Feb 2024 23:59:09 -0800 (PST) X-Forwarded-Encrypted: i=0; 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 Received: from claudiu-X670E-Pro-RS.. ([82.78.167.87]) by smtp.gmail.com with ESMTPSA id ty13-20020a170907c70d00b00a3715be38c4sm185544ejc.210.2024.02.01.23.59.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Feb 2024 23:59:09 -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 v3 7/8] watchdog: rzg2l_wdt: Add suspend/resume support Date: Fri, 2 Feb 2024 09:58:48 +0200 Message-Id: <20240202075849.3422380-8-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240202075849.3422380-1-claudiu.beznea.uj@bp.renesas.com> References: <20240202075849.3422380-1-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 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, };