From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752637AbcDEAhw (ORCPT ); Mon, 4 Apr 2016 20:37:52 -0400 Received: from mail-pf0-f172.google.com ([209.85.192.172]:35613 "EHLO mail-pf0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751039AbcDEAhu (ORCPT ); Mon, 4 Apr 2016 20:37:50 -0400 From: Guenter Roeck To: Wim Van Sebroeck Cc: Guenter Roeck , linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org, Guenter Roeck , Grant Grundler Subject: [PATCH] watchdog: qcom: Report reboot reason Date: Mon, 4 Apr 2016 17:37:46 -0700 Message-Id: <1459816666-87185-1-git-send-email-groeck@chromium.org> X-Mailer: git-send-email 2.8.0.rc3.226.g39d4020 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The Qualcom watchdog timer block reports if the system was reset by the watchdog. Pass the information to user space. Cc: Grant Grundler Signed-off-by: Guenter Roeck --- drivers/watchdog/qcom-wdt.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/watchdog/qcom-wdt.c b/drivers/watchdog/qcom-wdt.c index 20563cc..a043fa4 100644 --- a/drivers/watchdog/qcom-wdt.c +++ b/drivers/watchdog/qcom-wdt.c @@ -21,6 +21,7 @@ #define WDT_RST 0x38 #define WDT_EN 0x40 +#define WDT_STS 0x44 #define WDT_BITE_TIME 0x5C struct qcom_wdt { @@ -108,7 +109,8 @@ static const struct watchdog_ops qcom_wdt_ops = { static const struct watchdog_info qcom_wdt_info = { .options = WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE - | WDIOF_SETTIMEOUT, + | WDIOF_SETTIMEOUT + | WDIOF_CARDRESET, .identity = KBUILD_MODNAME, }; @@ -171,6 +173,9 @@ static int qcom_wdt_probe(struct platform_device *pdev) wdt->wdd.max_timeout = 0x10000000U / wdt->rate; wdt->wdd.parent = &pdev->dev; + if (readl(wdt->base + WDT_STS) & 1) + wdt->wdd.bootstatus = WDIOF_CARDRESET; + /* * If 'timeout-sec' unspecified in devicetree, assume a 30 second * default, unless the max timeout is less than 30 seconds, then use -- 2.8.0.rc3.226.g39d4020