From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935359AbdIYMO1 (ORCPT ); Mon, 25 Sep 2017 08:14:27 -0400 Received: from m50-138.163.com ([123.125.50.138]:38887 "EHLO m50-138.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935345AbdIYMOZ (ORCPT ); Mon, 25 Sep 2017 08:14:25 -0400 X-Greylist: delayed 914 seconds by postgrey-1.27 at vger.kernel.org; Mon, 25 Sep 2017 08:14:24 EDT From: "winton.liu" <18502523564@163.com> To: a.zummo@towertech.it, alexandre.belloni@free-electrons.com, linux-rtc@vger.kernel.org, linux-kernel@vger.kernel.org Cc: "winton.liu" <18502523564@163.com> Subject: [PATCH] rtc: ds1374: wdt:support suspend/resume for watchdog Date: Mon, 25 Sep 2017 19:58:44 +0800 Message-Id: <1506340724-18108-1-git-send-email-18502523564@163.com> X-Mailer: git-send-email 1.9.1 X-CM-TRANSID: C9GowACnafB378hZblaoAA--.121S2 X-Coremail-Antispam: 1Uf129KBjvdXoW7XryxKFW3GFWrJFy5Cr17KFg_yoWkZFbEkF 17X393Xr4DJ3ZYk3ZrA347ZrWkGrs5WF1DCFy0yas8ZayDX3yDAa9rXrsFka1UXFyUCa4F vws7ur48Zr17JjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7xREl1vPUUUUU== X-Originating-IP: [122.96.43.11] X-CM-SenderInfo: jprykiysvsjkiwu6il2tof0z/1tbipR5e9VUMG45viAAAs7 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When enable CONFIG_RTC_DRV_DS1374_WDT use as watchdog, in suspend mode, watchdog is still working but no daemon patting the watchdog. The system will reboot if timeout. So disable watchdog in suspend and recover it in resume. Signed-off-by: winton.liu <18502523564@163.com> --- drivers/rtc/rtc-ds1374.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/rtc/rtc-ds1374.c b/drivers/rtc/rtc-ds1374.c index 38a2e9e..e990773 100644 --- a/drivers/rtc/rtc-ds1374.c +++ b/drivers/rtc/rtc-ds1374.c @@ -690,6 +690,10 @@ static int ds1374_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); +#ifdef CONFIG_RTC_DRV_DS1374_WDT + ds1374_wdt_disable(); +#endif + if (client->irq > 0 && device_may_wakeup(&client->dev)) enable_irq_wake(client->irq); return 0; @@ -699,6 +703,10 @@ static int ds1374_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); +#ifdef CONFIG_RTC_DRV_DS1374_WDT + ds1374_wdt_settimeout(131072); +#endif + if (client->irq > 0 && device_may_wakeup(&client->dev)) disable_irq_wake(client->irq); return 0; -- 1.9.1