From patchwork Fri Oct 28 07:50:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcus Folkesson X-Patchwork-Id: 13023182 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 206FBECAAA1 for ; Fri, 28 Oct 2022 07:50:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229542AbiJ1HuG (ORCPT ); Fri, 28 Oct 2022 03:50:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40500 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229629AbiJ1HuF (ORCPT ); Fri, 28 Oct 2022 03:50:05 -0400 Received: from mail-lf1-x12a.google.com (mail-lf1-x12a.google.com [IPv6:2a00:1450:4864:20::12a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5A3DB558CD; Fri, 28 Oct 2022 00:50:04 -0700 (PDT) Received: by mail-lf1-x12a.google.com with SMTP id p8so6935727lfu.11; Fri, 28 Oct 2022 00:50:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=JzApucCH/+hZ0NSjSIByv4uO01lC/jRamcHK2nza1G4=; b=abGOI7RHWXO9MxRjGi1+vyUVAN3PF5JRkoV0aluuCTgUkPW4DD9fDuJFYdsknuT5Sq 1TjjHNEUO+EmXIlslhCcDq9mANft/gP1r+eHAeWM12eWjLKP1ZXRxWYMW2cOC5UYiDCy HXaJoKWsUzDhdHHSOtmLlgbj2bXxHfkaofkrtJDCzWGJu9pJAAIMcjh9AUmb0zJWHs7V 9NaCD4WSSqedgpxk/VtMHV3OEINwrfhm5vTczApMDVzpqkdYlofnVfqSOfzPHRvf+XN4 iiDAbEaokOXvMOEnLymgVu5N05A25sOLeKL9L7jDQynQ/NExEE4n1/zlL+9cJKj8k6e0 ROCw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=JzApucCH/+hZ0NSjSIByv4uO01lC/jRamcHK2nza1G4=; b=0zZ0t1Kpn4nCrDpPE7R3u/nMCyh72lEBMnm/RjIqvQoLFcWRH0p8fXpcRkKo0vMlQ4 aRx0Tmo7tjYFemspAXYXfqABVFVguXXPzxC0NE7yR6Aab4SOt280zTohFmQN9Yi1v5Zr cts78KJ7Q5IX7C4yxERVa0QIpJoXz23udNutAeNEQwraOVc9xiiaFWW5Twqa5EquBD6I TwjGiq0PNQ3lgyw5PB81OsX8YPnu7dLThTbbm+Iym/QxwaaEsksNqBvI0GseeMb8ps/N VrEfO6vCpkRT6gOxNsUUApX57cCjNpTJ2+o8fQRz4ZQMKXcp/fCH3tXqdWgHunwJYfYp 4Z6g== X-Gm-Message-State: ACrzQf0cBH7mJME3JmTxwtHKKdmSh0mFBxIp4hVI7Kx99vsHKMXVu0Ul E/BEgFX/l2y3LbH0kacaphY= X-Google-Smtp-Source: AMsMyM4541cTqT94evjudMNB20g+LXL/OK53ZeqSdt+A2bTJoIKgrIE9PLmZojJBM6GYNs4Tf/4W5g== X-Received: by 2002:a05:6512:3502:b0:496:8e:9307 with SMTP id h2-20020a056512350200b00496008e9307mr18721208lfs.504.1666943402586; Fri, 28 Oct 2022 00:50:02 -0700 (PDT) Received: from localhost.localdomain (82-209-154-112.cust.bredband2.com. [82.209.154.112]) by smtp.gmail.com with ESMTPSA id bk9-20020a05651c238900b0026befa96249sm539476ljb.8.2022.10.28.00.50.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Oct 2022 00:50:01 -0700 (PDT) From: Marcus Folkesson To: Wim Van Sebroeck , Guenter Roeck , Lee Jones Cc: linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org, Marcus Folkesson Subject: [PATCH] watchdog: rn5t618: add support for read out bootstatus Date: Fri, 28 Oct 2022 09:50:19 +0200 Message-Id: <20221028075019.2757812-1-marcus.folkesson@gmail.com> X-Mailer: git-send-email 2.37.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org The PMIC does store the power-off factor internally. Read it out and report it as bootstatus. Signed-off-by: Marcus Folkesson Reviewed-by: Guenter Roeck Acked-by: Lee Jones --- drivers/watchdog/rn5t618_wdt.c | 12 ++++++++++++ include/linux/mfd/rn5t618.h | 9 +++++++++ 2 files changed, 21 insertions(+) diff --git a/drivers/watchdog/rn5t618_wdt.c b/drivers/watchdog/rn5t618_wdt.c index 6e524c8e26a8..40d8ebd8c0ac 100644 --- a/drivers/watchdog/rn5t618_wdt.c +++ b/drivers/watchdog/rn5t618_wdt.c @@ -144,6 +144,8 @@ static int rn5t618_wdt_probe(struct platform_device *pdev) struct rn5t618 *rn5t618 = dev_get_drvdata(dev->parent); struct rn5t618_wdt *wdt; int min_timeout, max_timeout; + int ret; + unsigned int val; wdt = devm_kzalloc(dev, sizeof(struct rn5t618_wdt), GFP_KERNEL); if (!wdt) @@ -160,6 +162,16 @@ static int rn5t618_wdt_probe(struct platform_device *pdev) wdt->wdt_dev.timeout = max_timeout; wdt->wdt_dev.parent = dev; + /* Read out previous power-off factor */ + ret = regmap_read(wdt->rn5t618->regmap, RN5T618_POFFHIS, &val); + if (ret) + return ret; + + if (val & RN5T618_POFFHIS_VINDET) + wdt->wdt_dev.bootstatus = WDIOF_POWERUNDER; + else if (val & RN5T618_POFFHIS_WDG) + wdt->wdt_dev.bootstatus = WDIOF_CARDRESET; + watchdog_set_drvdata(&wdt->wdt_dev, wdt); watchdog_init_timeout(&wdt->wdt_dev, timeout, dev); watchdog_set_nowayout(&wdt->wdt_dev, nowayout); diff --git a/include/linux/mfd/rn5t618.h b/include/linux/mfd/rn5t618.h index 8aa0bda1af4f..aacb6d51e99c 100644 --- a/include/linux/mfd/rn5t618.h +++ b/include/linux/mfd/rn5t618.h @@ -227,6 +227,15 @@ #define RN5T618_WATCHDOG_WDOGTIM_S 0 #define RN5T618_PWRIRQ_IR_WDOG BIT(6) +#define RN5T618_POFFHIS_PWRON BIT(0) +#define RN5T618_POFFHIS_TSHUT BIT(1) +#define RN5T618_POFFHIS_VINDET BIT(2) +#define RN5T618_POFFHIS_IODET BIT(3) +#define RN5T618_POFFHIS_CPU BIT(4) +#define RN5T618_POFFHIS_WDG BIT(5) +#define RN5T618_POFFHIS_DCLIM BIT(6) +#define RN5T618_POFFHIS_N_OE BIT(7) + enum { RN5T618_DCDC1, RN5T618_DCDC2,