From patchwork Wed Jan 8 09:57:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marco Felsch X-Patchwork-Id: 11323141 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7469017EF for ; Wed, 8 Jan 2020 09:57:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5C4AA2070E for ; Wed, 8 Jan 2020 09:57:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727490AbgAHJ52 (ORCPT ); Wed, 8 Jan 2020 04:57:28 -0500 Received: from metis.ext.pengutronix.de ([85.220.165.71]:43881 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727567AbgAHJ5Q (ORCPT ); Wed, 8 Jan 2020 04:57:16 -0500 Received: from dude02.hi.pengutronix.de ([2001:67c:670:100:1d::28] helo=dude02.lab.pengutronix.de) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1ip85L-0003Ir-1U; Wed, 08 Jan 2020 10:57:07 +0100 Received: from mfe by dude02.lab.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1ip85K-00067C-3i; Wed, 08 Jan 2020 10:57:06 +0100 From: Marco Felsch To: support.opensource@diasemi.com, linux@roeck-us.net, robh+dt@kernel.org, lee.jones@linaro.org, stwiss.opensource@diasemi.com, Adam.Thomson.Opensource@diasemi.com Cc: linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de Subject: [PATCH 3/3] watchdog: da9062: add power management ops Date: Wed, 8 Jan 2020 10:57:04 +0100 Message-Id: <20200108095704.23233-4-m.felsch@pengutronix.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200108095704.23233-1-m.felsch@pengutronix.de> References: <20200108095704.23233-1-m.felsch@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::28 X-SA-Exim-Mail-From: mfe@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-watchdog@vger.kernel.org Sender: linux-watchdog-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Disable the watchdog during suspend if it is enabled and re-enable it on resume. So we can sleep without the interruptions. Signed-off-by: Marco Felsch Reviewed-by: Adam Thomson Reviewed-by: Guenter Roeck --- v2: - add dlg,use-sw-pm check to differentiate between automatic and manual disabling/enabling. --- drivers/watchdog/da9062_wdt.c | 37 +++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/drivers/watchdog/da9062_wdt.c b/drivers/watchdog/da9062_wdt.c index e149e66a6ea9..c9b9d6394525 100644 --- a/drivers/watchdog/da9062_wdt.c +++ b/drivers/watchdog/da9062_wdt.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include @@ -30,6 +31,7 @@ static const unsigned int wdt_timeout[] = { 0, 2, 4, 8, 16, 32, 65, 131 }; struct da9062_watchdog { struct da9062 *hw; struct watchdog_device wdtdev; + bool use_sw_pm; }; static unsigned int da9062_wdt_timeout_to_sel(unsigned int secs) @@ -198,6 +200,8 @@ static int da9062_wdt_probe(struct platform_device *pdev) if (!wdt) return -ENOMEM; + wdt->use_sw_pm = device_property_present(dev, "dlg,use-sw-pm"); + wdt->hw = chip; wdt->wdtdev.info = &da9062_watchdog_info; @@ -212,6 +216,7 @@ static int da9062_wdt_probe(struct platform_device *pdev) watchdog_set_restart_priority(&wdt->wdtdev, 128); watchdog_set_drvdata(&wdt->wdtdev, wdt); + dev_set_drvdata(dev, &wdt->wdtdev); ret = devm_watchdog_register_device(dev, &wdt->wdtdev); if (ret < 0) @@ -220,10 +225,42 @@ static int da9062_wdt_probe(struct platform_device *pdev) return da9062_wdt_ping(&wdt->wdtdev); } +static int __maybe_unused da9062_wdt_suspend(struct device *dev) +{ + struct watchdog_device *wdd = dev_get_drvdata(dev); + struct da9062_watchdog *wdt = watchdog_get_drvdata(wdd); + + if (!wdt->use_sw_pm) + return 0; + + if (watchdog_active(wdd)) + return da9062_wdt_stop(wdd); + + return 0; +} + +static int __maybe_unused da9062_wdt_resume(struct device *dev) +{ + struct watchdog_device *wdd = dev_get_drvdata(dev); + struct da9062_watchdog *wdt = watchdog_get_drvdata(wdd); + + if (!wdt->use_sw_pm) + return 0; + + if (watchdog_active(wdd)) + return da9062_wdt_start(wdd); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(da9062_wdt_pm_ops, + da9062_wdt_suspend, da9062_wdt_resume); + static struct platform_driver da9062_wdt_driver = { .probe = da9062_wdt_probe, .driver = { .name = "da9062-watchdog", + .pm = &da9062_wdt_pm_ops, .of_match_table = da9062_compatible_id_table, }, };