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([82.78.167.154]) by smtp.gmail.com with ESMTPSA id j32-20020a05600c1c2000b0040fbad272f6sm1106843wms.46.2024.02.05.23.52.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Feb 2024 23:52:06 -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 1/9] watchdog: rzg2l_wdt: Restrict the driver to ARCH_RZG2L and ARCH_R9A09G011 Date: Tue, 6 Feb 2024 09:51:41 +0200 Message-Id: <20240206075149.864996-2-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-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Claudiu Beznea The rzg2l_wdt driver is used only by ARCH_RZG2L and ARCH_R9A09G011 micro-architectures of Renesas. Thus, limit it's usage only to these. Suggested-by: Biju Das Signed-off-by: Claudiu Beznea --- Changes in v4: - none; this patch is introduced in v4 drivers/watchdog/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 7d22051b15a2..f6cb63a0d889 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -910,7 +910,7 @@ config RENESAS_RZN1WDT =20 config RENESAS_RZG2LWDT tristate "Renesas RZ/G2L WDT Watchdog" - depends on ARCH_RENESAS || COMPILE_TEST + depends on ARCH_RZG2L || ARCH_R9A09G011 || COMPILE_TEST select WATCHDOG_CORE help This driver adds watchdog support for the integrated watchdogs in the --=20 2.39.2 From nobody Tue Feb 10 03:17:56 2026 Received: from mail-wm1-f50.google.com (mail-wm1-f50.google.com [209.85.128.50]) (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 9788D12AAE4 for ; Tue, 6 Feb 2024 07:52:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.50 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707205933; cv=none; b=sj2FK6XjZbqfIZ/tO9D2vt3u9WNzW+oHimkLCZakOoFMVtClxTvy2yLVyG0552+UbzyiWBnF4sbhZayngBEryqlGHZxxjJbXQFZ9bqi8PdqL2LWW+LAOWU0UrCwOZ4MUrs7TG4PHURWuN1Bnei7h+4JModbPTv0LzYuXTTypaOQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707205933; c=relaxed/simple; bh=B7ZI2SD8d3W5zxWFuLoPUdZsUPHlZgyVmcI9/1dywKA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=HkHO90h0jzmg5Or5G+fIHNYreoHVtx+6lz7d3+kLo5AYEwuwtfGPrbSYhqXEtD+C+Y4lRowzqXkDuh/sq3fPEiJIyA52PPajpPfDOJ1Y4Q3U9Vli/NlFL/wHRkCzXq9Vf/N+WT8dVNZsUHdgkZwieT5m6gB3QPE4IanJ8WXKTIw= 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=OvbyAupr; arc=none smtp.client-ip=209.85.128.50 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="OvbyAupr" Received: by mail-wm1-f50.google.com with SMTP id 5b1f17b1804b1-40fe2744e5cso1346755e9.1 for ; Mon, 05 Feb 2024 23:52:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuxon.dev; s=google; t=1707205929; x=1707810729; 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=ntdF34/qM/GrD9bNmK0Jsu4ivGsCm/w2NOnD9IO/AYo=; b=OvbyAuprpVJCXudBf5e1lFbgf93J/44o60/LYZtlY0loiAT0GWZeH5gVJw41MPAAJp D81Q2boYZeoGkVBuWSj9X3nqWHJaTubCPZQA4d5W9q7EL/Jdz3UHJhq47iS4fetl2cHW u+LrjxK/Hb/Q7pqltMa5Gzr3Rk2nmKqRM8afDew6rJDlee/PW2LGW+l25Q9UChFUVIP+ Hii5lIkRCvKPNUr6DrtmnUGgv7qoJVkiBYwtt7WrUxW8dmVhm1o0dmtORQCskV2Bz+ec Awag0lp083hqbk0JfgSA4mEsRdMo87wP8sdDO9LobOTY4MIo79FeoXqVBef4F6LVNGaN Wf2Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1707205929; x=1707810729; 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=ntdF34/qM/GrD9bNmK0Jsu4ivGsCm/w2NOnD9IO/AYo=; b=Ex/m5FgxtJtTEOCUxQt6x9hfZoQJhkt+9ukSrTTOWEwQlTTRnHwAaM1o3Su7aT0Wgx sdnitwRFDjyrOAnvycZdvzaVWvpGph6RDD/P4NwXPRCbReInzMwkPZj/n90YQR4+SqrQ PS2h3cne3rBjP8JYeuTfvM2nmbKZZ3Bz7BEuryygKGnUU0KgHeQ7Z1OqLwFFAwuSz4IG lmEioPlLe/RLgWNP1S141IPL5Q6UtxdZrzNkHN5SMNCdg5ZLYxlx16Ihpcr+4DmVFuSX Ji05mS3RgODw5+i5oy55lNbPG3aSEVpTP1+0wj4u1+Id1YAHWtobrG0Mx3kUgQi/YjPE fXdg== X-Gm-Message-State: AOJu0Yw+FXlHhz8XFVM+PqjKRwGu+VUa0jIhSbRYE0Z35QbH1CtcSyMl sGH/h4hJMUzTTChtlqLbxjnSKwSZSVYEX4h7OpGfiCHbdfx2ZnVbsbYBhiHFeJI= X-Google-Smtp-Source: AGHT+IFwz95g7UNrHEEzVRlmGAtfhFESJIN69PsnSGCtPPHYEKmRrs/SvIKSESYT496QzRpD8F2Lyg== X-Received: by 2002:a05:600c:5116:b0:40f:dd0f:e7a5 with SMTP id o22-20020a05600c511600b0040fdd0fe7a5mr1451761wms.11.1707205929336; Mon, 05 Feb 2024 23:52:09 -0800 (PST) X-Forwarded-Encrypted: i=1; AJvYcCU3r8ZXyDBDwRKn/0GcTalVwfTDivewtn3VP+NJWfVcPsHXTiHxjkG/cNLNZfYH0yReTKMCS6272CmBry6K/5Hpmq6EW+mcE79JymttnE21NbTIsU250BcsM18j4fPu/xBU8IF/B1mwZ4uB4ep0SRJuGXxGJ0FBBnZGRsR4bYegXcUJqpPx52jVPrq2iSQYv4J25WXfw7OfkdGMiHm+uBC58RCYZkCGwmsOpjIpkNvBHeE0fhEeCXag3fnZ8Fl0vPWu6UkrAv06PIuBg84fH3k+BNahKyeZcEavGJw3d9vblsvJWBMwfTefl4LbcgmBh0U2t/zaP4TBuRbjHdCm53wuxnIs4gYTAhnWGlJcbynB4oXJ+sO40UP/RW91TiFbpQo7O0pjnws/Kin1knNJORSOUeo7VqXgrIN//hBpzlNHuMu1n5VezFSLF3qQNhBecWPBPbsP/R2tiqcUW/ISz2XpZlgGeGGM7dPNnFVnokOHW0jDN9JDp5zaW+RdrmlvgyTVoI+pkvlGOQ== Received: from claudiu-X670E-Pro-RS.. ([82.78.167.154]) by smtp.gmail.com with ESMTPSA id j32-20020a05600c1c2000b0040fbad272f6sm1106843wms.46.2024.02.05.23.52.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Feb 2024 23:52:09 -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 v4 2/9] watchdog: rzg2l_wdt: Make the driver depend on PM Date: Tue, 6 Feb 2024 09:51:42 +0200 Message-Id: <20240206075149.864996-3-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-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Claudiu Beznea The rzg2l_wdt watchdog driver cannot work w/o CONFIG_PM=3Dy (e.g. the clocks are enabled though pm_runtime_* specific APIs). To avoid building a driver that don't work select CONFIG_PM. Suggested-by: Guenter Roeck Signed-off-by: Claudiu Beznea --- Changes in v4: - s/ARCH_RENESAS/ARCH_RZG2L || ARCH_R9A09G011 due to patch 1/9 Changes in v3: - make driver depend on PM; with that the "unmet direct dependency" Reported-by: kernel test robot was also fixed - adapt commit message Changes in v2: - this patch is new drivers/watchdog/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index f6cb63a0d889..27e11ea7eeeb 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -910,7 +910,7 @@ config RENESAS_RZN1WDT =20 config RENESAS_RZG2LWDT tristate "Renesas RZ/G2L WDT Watchdog" - depends on ARCH_RZG2L || ARCH_R9A09G011 || COMPILE_TEST + depends on ((ARCH_RZG2L || ARCH_R9A09G011) && PM) || COMPILE_TEST select WATCHDOG_CORE help This driver adds watchdog support for the integrated watchdogs in the --=20 2.39.2 From nobody Tue Feb 10 03:17:56 2026 Received: from mail-wm1-f51.google.com (mail-wm1-f51.google.com [209.85.128.51]) (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 053B612B147 for ; 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([82.78.167.154]) by smtp.gmail.com with ESMTPSA id j32-20020a05600c1c2000b0040fbad272f6sm1106843wms.46.2024.02.05.23.52.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Feb 2024 23:52:10 -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 3/9] watchdog: rzg2l_wdt: Use pm_runtime_resume_and_get() Date: Tue, 6 Feb 2024 09:51:43 +0200 Message-Id: <20240206075149.864996-4-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-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Claudiu Beznea pm_runtime_get_sync() may return with error. In case it returns with error dev->power.usage_count needs to be decremented. pm_runtime_resume_and_get() takes care of this. Thus use it. Along with it the rzg2l_wdt_set_timeout() function was updated to propagate the result of rzg2l_wdt_start() to its caller. Fixes: 2cbc5cd0b55f ("watchdog: Add Watchdog Timer driver for RZ/G2L") Signed-off-by: Claudiu Beznea --- Changes in v4: - none Changes in v3: - none Changes in v2: - propagate the return code of rzg2l_wdt_start() to it's callers drivers/watchdog/rzg2l_wdt.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/watchdog/rzg2l_wdt.c b/drivers/watchdog/rzg2l_wdt.c index 1741f98ca67c..d87d4f50180c 100644 --- a/drivers/watchdog/rzg2l_wdt.c +++ b/drivers/watchdog/rzg2l_wdt.c @@ -123,8 +123,11 @@ static void rzg2l_wdt_init_timeout(struct watchdog_dev= ice *wdev) static int rzg2l_wdt_start(struct watchdog_device *wdev) { struct rzg2l_wdt_priv *priv =3D watchdog_get_drvdata(wdev); + int ret; =20 - pm_runtime_get_sync(wdev->parent); + ret =3D pm_runtime_resume_and_get(wdev->parent); + if (ret) + return ret; =20 /* Initialize time out */ rzg2l_wdt_init_timeout(wdev); @@ -150,6 +153,8 @@ static int rzg2l_wdt_stop(struct watchdog_device *wdev) =20 static int rzg2l_wdt_set_timeout(struct watchdog_device *wdev, unsigned in= t timeout) { + int ret =3D 0; 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([82.78.167.154]) by smtp.gmail.com with ESMTPSA id j32-20020a05600c1c2000b0040fbad272f6sm1106843wms.46.2024.02.05.23.52.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Feb 2024 23:52:13 -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 4/9] watchdog: rzg2l_wdt: Check return status of pm_runtime_put() Date: Tue, 6 Feb 2024 09:51:44 +0200 Message-Id: <20240206075149.864996-5-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-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Claudiu Beznea pm_runtime_put() may return an error code. Check its return status. Along with it the rzg2l_wdt_set_timeout() function was updated to propagate the result of rzg2l_wdt_stop() to its caller. Fixes: 2cbc5cd0b55f ("watchdog: Add Watchdog Timer driver for RZ/G2L") Signed-off-by: Claudiu Beznea --- Changes in v4: - none Changes in v3: - none Changes in v2: - propagate the return code of rzg2l_wdt_stop() to it's callers drivers/watchdog/rzg2l_wdt.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/watchdog/rzg2l_wdt.c b/drivers/watchdog/rzg2l_wdt.c index d87d4f50180c..7bce093316c4 100644 --- a/drivers/watchdog/rzg2l_wdt.c +++ b/drivers/watchdog/rzg2l_wdt.c @@ -144,9 +144,13 @@ static int rzg2l_wdt_start(struct watchdog_device *wde= v) static int rzg2l_wdt_stop(struct watchdog_device *wdev) { struct rzg2l_wdt_priv *priv =3D watchdog_get_drvdata(wdev); + int ret; =20 rzg2l_wdt_reset(priv); - pm_runtime_put(wdev->parent); + + ret =3D pm_runtime_put(wdev->parent); + if (ret < 0) + return ret; =20 return 0; } @@ -163,7 +167,10 @@ static int rzg2l_wdt_set_timeout(struct watchdog_devic= e *wdev, unsigned int time * to reset the module) so that it is updated with new timeout values. */ if (watchdog_active(wdev)) { - rzg2l_wdt_stop(wdev); 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([82.78.167.154]) by smtp.gmail.com with ESMTPSA id j32-20020a05600c1c2000b0040fbad272f6sm1106843wms.46.2024.02.05.23.52.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Feb 2024 23:52:14 -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 5/9] watchdog: rzg2l_wdt: Remove reset de-assert on probe/stop Date: Tue, 6 Feb 2024 09:51:45 +0200 Message-Id: <20240206075149.864996-6-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-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Claudiu Beznea There is no need to de-assert the reset signal on probe as the watchdog is not used prior executing start. Also, the clocks are not enabled in probe (pm_runtime_enable() doesn't do that), thus this is another indicator that the watchdog wasn't used previously like this. Instead, keep the watchdog hardware in its previous state at probe (by default it is in reset state), enable it when it is started and move it to reset state when it is stopped. This saves some extra power when the watchdog is unused. Signed-off-by: Claudiu Beznea --- Changes in v4: - none Changes in v3: - none Changes in v2: - none drivers/watchdog/rzg2l_wdt.c | 26 +++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-) diff --git a/drivers/watchdog/rzg2l_wdt.c b/drivers/watchdog/rzg2l_wdt.c index 7bce093316c4..93a49fd0c7aa 100644 --- a/drivers/watchdog/rzg2l_wdt.c +++ b/drivers/watchdog/rzg2l_wdt.c @@ -129,6 +129,10 @@ static int rzg2l_wdt_start(struct watchdog_device *wde= v) if (ret) return ret; =20 + ret =3D reset_control_deassert(priv->rstc); + if (ret) + return ret; + /* Initialize time out */ rzg2l_wdt_init_timeout(wdev); =20 @@ -146,7 +150,9 @@ static int rzg2l_wdt_stop(struct watchdog_device *wdev) struct rzg2l_wdt_priv *priv =3D watchdog_get_drvdata(wdev); int ret; =20 - rzg2l_wdt_reset(priv); + ret =3D reset_control_assert(priv->rstc); + if (ret) + return ret; =20 ret =3D pm_runtime_put(wdev->parent); if (ret < 0) @@ -186,6 +192,12 @@ static int rzg2l_wdt_restart(struct watchdog_device *w= dev, clk_prepare_enable(priv->osc_clk); =20 if (priv->devtype =3D=3D WDT_RZG2L) { + int ret; + + ret =3D reset_control_deassert(priv->rstc); + if (ret) + return ret; + /* Generate Reset (WDTRSTB) Signal on parity error */ rzg2l_wdt_write(priv, 0, PECR); =20 @@ -236,13 +248,11 @@ static const struct watchdog_ops rzg2l_wdt_ops =3D { .restart =3D rzg2l_wdt_restart, }; =20 -static void rzg2l_wdt_reset_assert_pm_disable(void *data) +static void rzg2l_wdt_pm_disable(void *data) { struct watchdog_device *wdev =3D data; - struct rzg2l_wdt_priv *priv =3D watchdog_get_drvdata(wdev); =20 pm_runtime_disable(wdev->parent); - reset_control_assert(priv->rstc); } =20 static int rzg2l_wdt_probe(struct platform_device *pdev) @@ -285,10 +295,6 @@ static int rzg2l_wdt_probe(struct platform_device *pde= v) return dev_err_probe(&pdev->dev, PTR_ERR(priv->rstc), "failed to get cpg reset"); =20 - ret =3D reset_control_deassert(priv->rstc); - if (ret) - return dev_err_probe(dev, ret, "failed to deassert"); - priv->devtype =3D (uintptr_t)of_device_get_match_data(dev); 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([82.78.167.154]) by smtp.gmail.com with ESMTPSA id j32-20020a05600c1c2000b0040fbad272f6sm1106843wms.46.2024.02.05.23.52.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Feb 2024 23:52:16 -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 6/9] watchdog: rzg2l_wdt: Remove comparison with zero Date: Tue, 6 Feb 2024 09:51:46 +0200 Message-Id: <20240206075149.864996-7-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-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Claudiu Beznea devm_add_action_or_reset() could return -ENOMEM or zero. Thus, remove comparison with zero of the returning value to make code simpler. Signed-off-by: Claudiu Beznea --- Changes in v4: - none Changes in v3: - none Changes in v2: - none drivers/watchdog/rzg2l_wdt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/watchdog/rzg2l_wdt.c b/drivers/watchdog/rzg2l_wdt.c index 93a49fd0c7aa..29eb47bcf984 100644 --- a/drivers/watchdog/rzg2l_wdt.c +++ b/drivers/watchdog/rzg2l_wdt.c @@ -316,7 +316,7 @@ static int rzg2l_wdt_probe(struct platform_device *pdev) =20 watchdog_set_drvdata(&priv->wdev, priv); ret =3D devm_add_action_or_reset(&pdev->dev, rzg2l_wdt_pm_disable, &priv-= >wdev); - if (ret < 0) + if (ret) return ret; =20 watchdog_set_nowayout(&priv->wdev, nowayout); --=20 2.39.2 From nobody Tue Feb 10 03:17:56 2026 Received: from mail-wm1-f47.google.com (mail-wm1-f47.google.com [209.85.128.47]) (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 E1EF912C55E for ; Tue, 6 Feb 2024 07:52:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.47 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707205942; cv=none; b=Klk2r7VQhKy8a+wobPSgI4FZCTQgTzHmxbCrMNjJ3OyR7vpxeZ+EnZYTesHn0TQABATkj9iGxWO5/hM0RS1uPx92C8qVCdcvVs7pJNOFkDZf8mF8/sxBhf4vt0960PYqAPI1dVGVhvoWKKtl3JOs1JnOVca0+e9hNvHnWz37JLU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707205942; c=relaxed/simple; bh=jKTSHJTtTI4N0iJp7IFQIhA+NWord9Ob1XRiUrlNEHo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Rewk6rH1Qe6ZBbENyNFy2JKSVYB6asZhrGM5+iKRrHxJNX6GZ2SsNwdeN+2ZTTdqmuB1N3ekyY77OxpSOMEsNy974ZaXLS8KeJrEIX+t4Bbc9vApq2i2Vv1flPyg/jVHrcxm5q3VnUDOQh2jx2hT3SQtXpSGMx7Ea5HB2d75jsU= 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=FeEKYPsG; arc=none smtp.client-ip=209.85.128.47 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="FeEKYPsG" Received: by mail-wm1-f47.google.com with SMTP id 5b1f17b1804b1-40fc6343bd2so34880725e9.1 for ; Mon, 05 Feb 2024 23:52:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuxon.dev; s=google; t=1707205939; x=1707810739; 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=oWojBmpvYKWohEDFYHq6fZ2AU0LO/ivcX8nI4tPnMdo=; b=FeEKYPsGc3D+mxJwJXSTnWM2M/ge7sJu1B5sNA7G8aT/cEFJ9nb62CR2ykebQ1xwUB 9ev4eoNuCK6oc+HC0wSppRcKucALcha2CHcmMJcQJcwDOMm4HEhWqEj4/awsiE8xFuGM Iv3l5p/QyQv+lt5KvaWgSs3tyFFqhy0IkPTcWUpXsHe471CuEwUzVM4FfFFiQ+H7uLz2 P+pMyDnGXSEdj/6mMtL4agjiu4LPBRhxgVFgmGWHbc1EDxKPemI8AYpwnr7ryYZMhc7R NsqnZckCcquhHAijzwvRj+U9hHpBCwbMEKc1ib8DlW4hFC0y4ixsa3oSRDG9gjZQhNlh HTgw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1707205939; x=1707810739; 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=oWojBmpvYKWohEDFYHq6fZ2AU0LO/ivcX8nI4tPnMdo=; b=Y0czg8RfSlE8D8JHoLMP6nuvYZF9esUwnzPXOYCrEVAg5+rmiFRsaxKqlh9Kmyr847 eRPAkGessGWsTkrChw29khuteXFawnXHY45DzW5jssTh/oLjVt/7jQsQZBMJbjkTxgb/ AA4NdDLMgGhHTbvLLXAEOsq01U5Nxsph5knc3qz3pVW3ZZG718/5Os1SaLLQn1RActe1 sLQtqLq0cJmLY/PNdvOy0tq0rzvEIHdvdmwDGgGIyppX221gkdhs5XssqTkQ9AEl8Ba0 k0AzFRFKr3qMQ/ECNYG3oxENbFb8m4Se2b3BWCqWgRQgybTrVaHdSToRKGmDUrao7+el 0j9A== X-Gm-Message-State: AOJu0YxILpATZluMlUcma/6CDix8wtnv3mDh6DgUPvdLZ0xZdH2+iyj6 hhWyetDXLDNQqKq6dWDFIgA7lZBOlCqG34I32rRndq6INu5cAiJOMPAWseOIJCQ= X-Google-Smtp-Source: AGHT+IE1KCHfFqNJTUF491wTOEguszTxGu9U5rKdSCHIS/yH+UvTbSjcd2dnsTM2BBhAFR992ZN9cg== X-Received: by 2002:a05:600c:354b:b0:40e:befe:37f3 with SMTP id i11-20020a05600c354b00b0040ebefe37f3mr1095012wmq.4.1707205939244; Mon, 05 Feb 2024 23:52:19 -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.46.2024.02.05.23.52.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Feb 2024 23:52:18 -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 7/9] watchdog: rzg2l_wdt: Rely on the reset driver for doing proper reset Date: Tue, 6 Feb 2024 09:51:47 +0200 Message-Id: <20240206075149.864996-8-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-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 Reviewed-by: Philipp Zabel --- Changes in v4: - collected tag Changes in v3: - none 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; }; =20 -static int rzg2l_wdt_reset(struct rzg2l_wdt_priv *priv) -{ - int err, status; - - if (priv->devtype =3D=3D WDT_RZV2M) { - /* WDT needs TYPE-B reset control */ - err =3D reset_control_assert(priv->rstc); - if (err) - return err; - ndelay(priv->minimum_assertion_period); - err =3D reset_control_deassert(priv->rstc); - if (err) - return err; - err =3D read_poll_timeout(reset_control_status, status, - status !=3D 1, 0, 1000, false, - priv->rstc); - } else { - err =3D 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 =3D watchdog_get_drvdata(wdev); + int ret; =20 clk_prepare_enable(priv->pclk); clk_prepare_enable(priv->osc_clk); =20 if (priv->devtype =3D=3D WDT_RZG2L) { - int ret; - ret =3D reset_control_deassert(priv->rstc); if (ret) return ret; @@ -205,7 +179,9 @@ static int rzg2l_wdt_restart(struct watchdog_device *wd= ev, rzg2l_wdt_write(priv, PEEN_FORCE, PEEN); } else { /* RZ/V2M doesn't have parity error registers */ - rzg2l_wdt_reset(priv); + ret =3D reset_control_reset(priv->rstc); 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([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-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 =3D WDT_DEFAULT_TIMEOUT; =20 watchdog_set_drvdata(&priv->wdev, priv); + dev_set_drvdata(dev, priv); ret =3D 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[] =3D { }; MODULE_DEVICE_TABLE(of, rzg2l_wdt_ids); =20 +static int rzg2l_wdt_suspend_late(struct device *dev) +{ + struct rzg2l_wdt_priv *priv =3D 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 =3D 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 =3D { + LATE_SYSTEM_SLEEP_PM_OPS(rzg2l_wdt_suspend_late, rzg2l_wdt_resume_early) +}; + static struct platform_driver rzg2l_wdt_driver =3D { .driver =3D { .name =3D "rzg2l_wdt", .of_match_table =3D rzg2l_wdt_ids, + .pm =3D &rzg2l_wdt_pm_ops, }, .probe =3D rzg2l_wdt_probe, }; --=20 2.39.2 From nobody Tue Feb 10 03:17:56 2026 Received: from mail-wm1-f47.google.com (mail-wm1-f47.google.com [209.85.128.47]) (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 2FA7C12D15E for ; Tue, 6 Feb 2024 07:52:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.47 ARC-Seal: i=1; a=rsa-sha256; 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([82.78.167.154]) by smtp.gmail.com with ESMTPSA id j32-20020a05600c1c2000b0040fbad272f6sm1106843wms.46.2024.02.05.23.52.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Feb 2024 23:52:22 -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 , Conor Dooley Subject: [PATCH v4 9/9] dt-bindings: watchdog: renesas,wdt: Document RZ/G3S support Date: Tue, 6 Feb 2024 09:51:49 +0200 Message-Id: <20240206075149.864996-10-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-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Claudiu Beznea Document the support for the watchdog IP available on RZ/G3S SoC. The watchdog IP available on RZ/G3S SoC is identical to the one found on RZ/G2L SoC. Signed-off-by: Claudiu Beznea Acked-by: Conor Dooley Reviewed-by: Geert Uytterhoeven --- Changes in v4: - none Changes in v3: - re-arranged the tags as my b4 am/shazam placed previously the Ab, Rb tags before the author's Sob Changes in v2: - collected tags - s/G2UL/G2L in patch description Documentation/devicetree/bindings/watchdog/renesas,wdt.yaml | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/watchdog/renesas,wdt.yaml b/= Documentation/devicetree/bindings/watchdog/renesas,wdt.yaml index 951a7d54135a..220763838df0 100644 --- a/Documentation/devicetree/bindings/watchdog/renesas,wdt.yaml +++ b/Documentation/devicetree/bindings/watchdog/renesas,wdt.yaml @@ -29,6 +29,7 @@ properties: - renesas,r9a07g043-wdt # RZ/G2UL and RZ/Five - renesas,r9a07g044-wdt # RZ/G2{L,LC} - renesas,r9a07g054-wdt # RZ/V2L + - renesas,r9a08g045-wdt # RZ/G3S - const: renesas,rzg2l-wdt =20 - items: --=20 2.39.2