From patchwork Wed Jan 31 10:20:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudiu X-Patchwork-Id: 13539095 Received: from mail-ej1-f53.google.com (mail-ej1-f53.google.com [209.85.218.53]) (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 E62F9768F1 for ; Wed, 31 Jan 2024 10:20:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.53 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706696442; cv=none; b=Fhshdr/2tqmbVHQanDKwdpdMJ4w755tmIJF119Ky2QDqDn0LxnlA9QY6lnJ9kTWezTKQin1LvIPaFkCBc/CqmyjLqBIeruvUq1Y2U6DUzxArfuAHKxuh2lxpsoyzaIS44YvMnOPIn87SU7qmw1W2bE7yv/U8RIqtSmqPax+3qz0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706696442; c=relaxed/simple; bh=AZzVusD5nkVLXNJ6AXM1LOfhGZ6jvjtVIAV7p2+5XX4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=q1/1T/RiPjqKBgV/JP+TlEHu3a2XSUyabCHEbwoU3eRQCKGUaqpQpdWnqqS+Py9KOAKAMmGHJ399JmCpF1ORnk50peZg58E2kssXWl5X7b+gT7Gsgp+uQ1okeb0zE9w4pSBmNI345vMYH/2rCzHzi0+mSiHx0OUxG6tYhixO3mg= 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=KoCg8CDe; arc=none smtp.client-ip=209.85.218.53 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="KoCg8CDe" Received: by mail-ej1-f53.google.com with SMTP id a640c23a62f3a-a271a28aeb4so634343466b.2 for ; Wed, 31 Jan 2024 02:20:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuxon.dev; s=google; t=1706696439; x=1707301239; 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=ylOo2w4JpdKbsiv3eDKS5wBqJdTApoM6QjMPUaO7jbM=; b=KoCg8CDeY6M0vq6Ak+MusTWawpG2HgLjNIjD8TBF96P8/PhKgs4+mOlabbghnHZIXR iKthIaQSNmBO8aBTwiLXflcso8UznBmIeFNrgJ+2RQ9c9kz6wP91iwZMkMh8I5LX1jPO HmJKen9M3coBPlAxGWCSPSTQShpQrxJMdSGk7gE1zBzn/ax4IbOTX//7dmHMIrK1Tu4T 72DcmywcKYy8a58jSinalCwfJlRSpUDcHOnGg92KKp9CN6E9Fq/IKyqS4T2tyDF3cKJ7 hUJhQgxTOnmKW/tSytspRoCRM0WDk6qOgBw5wuUwDn0P3MZ/hivLsIJS3mo9Nvs0VKoH tcMg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1706696439; x=1707301239; 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=ylOo2w4JpdKbsiv3eDKS5wBqJdTApoM6QjMPUaO7jbM=; b=lomd9UiHmOna/Q9Rt5T7oGV6PouWiT89hX3i7C+oEq15mMS10XSd+PlSqi18bjQVn8 uLZmpPejz5LUPLAhK/dJ3l5vucPkA0aWfrJvSDWJ6KCoMmJatGQ0I9Iw72n6t5lVEe5A ca7ciyO+AIDxXF2/kLn89Ilro4f4pZf7uqc+etMGmognVB0nHqieNJCYbG5YaQUSeRsk i5lST7cWFH5btsZsAk7okbLz2VXFF+nJCoo6kR/LGL4hAsh2fuwKJWF+baL4GOjpLxoN D3HAanikcjCsneE1Y8bOHh4cOVQ3leHbWnamDhYoJOxEyx7zRw/sRXdrxJcnhf2Xl02E XVrA== X-Gm-Message-State: AOJu0YyApfE8FHDy4x75yId8DaLIZY1Kwyo5yN/0sMFcgWudeXTRbpBY gsiepj7UoCzOuolw+02Ml3TsvrDP4fjty0CXUTXfb6H6VEhZmEav7IMGqkZESD4= X-Google-Smtp-Source: AGHT+IH2u/BJ8PiBkXfGsaTbe4MZau6HbAbTIcgK4OYU/qpTUaMC3DmClgoGbos43t5ckGZct6CLfg== X-Received: by 2002:a17:906:e2cd:b0:a26:90a0:696e with SMTP id gr13-20020a170906e2cd00b00a2690a0696emr882233ejb.41.1706696439265; Wed, 31 Jan 2024 02:20:39 -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 vk6-20020a170907cbc600b00a3524be5a86sm5212966ejc.103.2024.01.31.02.20.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 31 Jan 2024 02:20:38 -0800 (PST) From: Claudiu X-Google-Original-From: Claudiu To: wim@linux-watchdog.org, linux@roeck-us.net, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, geert+renesas@glider.be, magnus.damm@gmail.com, mturquette@baylibre.com, sboyd@kernel.org, p.zabel@pengutronix.de, 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, linux-clk@vger.kernel.org, claudiu.beznea@tuxon.dev, Claudiu Beznea Subject: [PATCH v2 07/11] watchdog: rzg2l_wdt: Rely on the reset driver for doing proper reset Date: Wed, 31 Jan 2024 12:20:13 +0200 Message-Id: <20240131102017.1841495-8-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240131102017.1841495-1-claudiu.beznea.uj@bp.renesas.com> References: <20240131102017.1841495-1-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 reset driver has been adapted in commit da235d2fac21 ("clk: renesas: rzg2l: Check reset monitor registers") to check the reset monitor bits before declaring reset asserts/de-asserts as successful/failure operations. With that, there is no need to keep the reset workaround for RZ/V2M in place in the watchdog driver. Signed-off-by: Claudiu Beznea --- Changes in v2: - none drivers/watchdog/rzg2l_wdt.c | 39 ++++-------------------------------- 1 file changed, 4 insertions(+), 35 deletions(-) diff --git a/drivers/watchdog/rzg2l_wdt.c b/drivers/watchdog/rzg2l_wdt.c index 29eb47bcf984..42f1d5d6f07e 100644 --- a/drivers/watchdog/rzg2l_wdt.c +++ b/drivers/watchdog/rzg2l_wdt.c @@ -8,7 +8,6 @@ #include #include #include -#include #include #include #include @@ -54,35 +53,11 @@ struct rzg2l_wdt_priv { struct reset_control *rstc; unsigned long osc_clk_rate; unsigned long delay; - unsigned long minimum_assertion_period; struct clk *pclk; struct clk *osc_clk; enum rz_wdt_type devtype; }; -static int rzg2l_wdt_reset(struct rzg2l_wdt_priv *priv) -{ - int err, status; - - if (priv->devtype == WDT_RZV2M) { - /* WDT needs TYPE-B reset control */ - err = reset_control_assert(priv->rstc); - if (err) - return err; - ndelay(priv->minimum_assertion_period); - err = reset_control_deassert(priv->rstc); - if (err) - return err; - err = read_poll_timeout(reset_control_status, status, - status != 1, 0, 1000, false, - priv->rstc); - } else { - err = reset_control_reset(priv->rstc); - } - - return err; -} - static void rzg2l_wdt_wait_delay(struct rzg2l_wdt_priv *priv) { /* delay timer when change the setting register */ @@ -187,13 +162,12 @@ static int rzg2l_wdt_restart(struct watchdog_device *wdev, unsigned long action, void *data) { struct rzg2l_wdt_priv *priv = watchdog_get_drvdata(wdev); + int ret; clk_prepare_enable(priv->pclk); clk_prepare_enable(priv->osc_clk); if (priv->devtype == WDT_RZG2L) { - int ret; - ret = reset_control_deassert(priv->rstc); if (ret) return ret; @@ -205,7 +179,9 @@ static int rzg2l_wdt_restart(struct watchdog_device *wdev, rzg2l_wdt_write(priv, PEEN_FORCE, PEEN); } else { /* RZ/V2M doesn't have parity error registers */ - rzg2l_wdt_reset(priv); + ret = reset_control_reset(priv->rstc); + if (ret) + return ret; wdev->timeout = 0; @@ -297,13 +273,6 @@ static int rzg2l_wdt_probe(struct platform_device *pdev) priv->devtype = (uintptr_t)of_device_get_match_data(dev); - if (priv->devtype == WDT_RZV2M) { - priv->minimum_assertion_period = RZV2M_A_NSEC + - 3 * F2CYCLE_NSEC(pclk_rate) + 5 * - max(F2CYCLE_NSEC(priv->osc_clk_rate), - F2CYCLE_NSEC(pclk_rate)); - } - pm_runtime_enable(&pdev->dev); priv->wdev.info = &rzg2l_wdt_ident;