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Mon, 8 Aug 2022 17:13:02 +0200 Received: from md1za8fc.ad001.siemens.net (139.25.0.80) by DEMCHDC89XA.ad011.siemens.net (139.25.226.103) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.9; Mon, 8 Aug 2022 17:13:02 +0200 From: Henning Schild To: Wim Van Sebroeck , Guenter Roeck , , CC: Henning Schild Subject: [PATCH] watchdog: w83627hf_wdt: add boostatus support Date: Mon, 8 Aug 2022 17:12:47 +0200 Message-ID: <20220808151247.14893-1-henning.schild@siemens.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 X-Originating-IP: [139.25.0.80] X-ClientProxiedBy: DEMCHDC8A0A.ad011.siemens.net (139.25.226.106) To DEMCHDC89XA.ad011.siemens.net (139.25.226.103) X-TM-AS-Product-Ver: SMEX-14.0.0.3080-8.6.1018-26680.007 X-TM-AS-Result: No-10--9.932400-8.000000 X-TMASE-MatchedRID: ThXY+5ucIBwqFSncf8X1z8TdRbTaatC1LGmmJTL2jhwD2WXLXdz+AUcA 1Ouvduu8SMg2Oe/b8EyfUDMAh2QVUQE2DjEevfnaKH2Br16x0Mq0Tit9+Kk6btWxbZgaqhS0a5K GiIX2maqbKItl61J/yfJvocwUrWp7XWPmaFoiyJsgBwKKRHe+rz0KLOdseNrKf0VfpLZx4hR80j R4aHVLSnNnCd3Hrhuwsuv6xiRRKlw= X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--9.932400-8.000000 X-TMASE-Version: SMEX-14.0.0.3080-8.6.1018-26680.007 X-TM-SNTS-SMTP: 96E14921677BF4E3118BFA88D896A8377F521B2EE24455B78E1F4B0C4AF3201B2000:8 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: f9da6581-b56f-42c9-0d78-08da79507e98 X-MS-TrafficTypeDiagnostic: DU0PR10MB5776:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: siemens.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Aug 2022 15:13:05.4116 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f9da6581-b56f-42c9-0d78-08da79507e98 X-MS-Exchange-CrossTenant-Id: 38ae3bcd-9579-4fd4-adda-b42e1495d55a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=38ae3bcd-9579-4fd4-adda-b42e1495d55a;Ip=[194.138.21.76];Helo=[hybrid.siemens.com] X-MS-Exchange-CrossTenant-AuthSource: VE1EUR01FT026.eop-EUR01.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU0PR10MB5776 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org The status bit in the status and control register can tell us whether the last reboot was caused by the watchdog. Make sure to take that into the bootstatus before clearing it. Signed-off-by: Henning Schild Reviewed-by: Guenter Roeck --- drivers/watchdog/w83627hf_wdt.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/watchdog/w83627hf_wdt.c b/drivers/watchdog/w83627hf_wdt.c index 56a4a4030ca9..bc33b63c5a5d 100644 --- a/drivers/watchdog/w83627hf_wdt.c +++ b/drivers/watchdog/w83627hf_wdt.c @@ -113,6 +113,10 @@ MODULE_PARM_DESC(early_disable, "Disable watchdog at boot time (default=0)"); #define W836X7HF_WDT_CSR 0xf7 #define NCT6102D_WDT_CSR 0xf2 +#define WDT_CSR_STATUS 0x10 +#define WDT_CSR_KBD 0x40 +#define WDT_CSR_MOUSE 0x80 + static void superio_outb(int reg, int val) { outb(reg, WDT_EFER); @@ -244,8 +248,12 @@ static int w83627hf_init(struct watchdog_device *wdog, enum chips chip) t = superio_inb(cr_wdt_control) & ~0x0C; superio_outb(cr_wdt_control, t); - /* reset trigger, disable keyboard & mouse turning off watchdog */ - t = superio_inb(cr_wdt_csr) & ~0xD0; + t = superio_inb(cr_wdt_csr); + if (t & WDT_CSR_STATUS) + wdog->bootstatus |= WDIOF_CARDRESET; + + /* reset status, disable keyboard & mouse turning off watchdog */ + t &= ~(WDT_CSR_STATUS | WDT_CSR_KBD | WDT_CSR_MOUSE); superio_outb(cr_wdt_csr, t); superio_exit();