From patchwork Thu Nov 21 08:28:12 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Roullier X-Patchwork-Id: 11255895 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 9F1FE14DB for ; Thu, 21 Nov 2019 08:28:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7F1CA2089D for ; Thu, 21 Nov 2019 08:28:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="clWIItNx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726230AbfKUI2y (ORCPT ); Thu, 21 Nov 2019 03:28:54 -0500 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:4366 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726265AbfKUI2y (ORCPT ); Thu, 21 Nov 2019 03:28:54 -0500 Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx08-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xAL8RF1c015814; Thu, 21 Nov 2019 09:28:24 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : mime-version : content-type; s=STMicroelectronics; bh=wjsLtY6RF/TmfFrW+HyWDf5AOePlorIoRKUEr506fms=; b=clWIItNxXIRk0L3RQG7fN5uXpQNEZSo+eUh9Y88ARISs68bC9vxe1dNDYSxZKcvswvxv N5o43R0W5TyWB7Trw6eI62f4GSv5Oo/zJusRRIcBGRZlTYb4E9St9RYZ9NC4p1JwajQg vHdNrSlEQjQvUpyM5RL5tetO1bBL0jhVMwz4C7w/4CCySJfWEo8/qLIm6ORbhV8z6Ba9 0F3HWVUzSZC7KCugYZZazd6rg14lhadFlHq5DNfGR9YI/QnkbamXAEUzS0g+KXc5FwSt ECnPIvWQcAvtKcm0EFkh4H8tLn0L6Xlu1EUUWMlu1dw2O8ffjgWw9Vsn3fCCaOiO5IR9 Rg== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx08-00178001.pphosted.com with ESMTP id 2wa9upafmg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 21 Nov 2019 09:28:24 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 035CC10003A; Thu, 21 Nov 2019 09:28:24 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag5node3.st.com [10.75.127.15]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id E56302AEF15; Thu, 21 Nov 2019 09:28:23 +0100 (CET) Received: from localhost (10.75.127.44) by SFHDAG5NODE3.st.com (10.75.127.15) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 21 Nov 2019 09:28:23 +0100 From: Christophe Roullier To: , , , CC: , , , , Subject: [PATCH 0/1] stm32_iwdg: set WDOG_HW_RUNNING at probe Date: Thu, 21 Nov 2019 09:28:12 +0100 Message-ID: <20191121082813.29267-1-christophe.roullier@st.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.75.127.44] X-ClientProxiedBy: SFHDAG4NODE2.st.com (10.75.127.11) To SFHDAG5NODE3.st.com (10.75.127.15) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-11-20_08:2019-11-20,2019-11-20 signatures=0 Sender: linux-watchdog-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org If the watchdog hardware is already enabled during the boot process, when the Linux watchdog driver loads, it should reset the watchdog and tell the watchdog framework. As a result, ping can be generated from the watchdog framework (if CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED is set), until the userspace watchdog daemon takes over control Verified : Watchdog enable in Uboot + HANDLE_BOOT_ENABLE is not set + daemon watchdog in userland ON ==> No reset IWDG2 Watchdog enable in Uboot + HANDLE_BOOT_ENABLE is not set ==> Reset IWDG2 Watchdog enable in Uboot + HANDLE_BOOT_ENABLE=y ==> No reset IWDG2 Watchdog enable in Uboot + HANDLE_BOOT_ENABLE=y + daemon watchdog in userland ON puis OFF ==> Reset IWDG2 Watchdog disable in Uboot + HANDLE_BOOT_ENABLE is not set ==> No reset IWDG2 Watchdog disable in Uboot + HANDLE_BOOT_ENABLE=y ==> No reset IWDG2 Watchdog disable in Uboot + HANDLE_BOOT_ENABLE=y + daemon watchdog in userland ON ==> No reset IWDG2 Watchdog disable in Uboot + HANDLE_BOOT_ENABLE=y + daemon watchdog in userland ON puis OFF ==> Reset IWDG2 Christophe Roullier (1): drivers: watchdog: stm32_iwdg: set WDOG_HW_RUNNING at probe drivers/watchdog/stm32_iwdg.c | 57 ++++++++++++++++++++++++----------- 1 file changed, 40 insertions(+), 17 deletions(-)