Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753759AbdFMUil (ORCPT ); Tue, 13 Jun 2017 16:38:41 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:49681 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751989AbdFMUii (ORCPT ); Tue, 13 Jun 2017 16:38:38 -0400 From: Christopher Bostic To: wim@iguana.be, linux@roeck-us.net Cc: Christopher Bostic , joel@jms.id.au, linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org, andrew@aj.id.au Subject: [PATCH 1/2] drivers/watchdog: Document new aspeed optional dev tree properties. Date: Tue, 13 Jun 2017 15:38:17 -0500 X-Mailer: git-send-email 2.10.1 (Apple Git-78) In-Reply-To: <20170613203818.17399-1-cbostic@linux.vnet.ibm.com> References: <20170613203818.17399-1-cbostic@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17061320-0016-0000-0000-000006F51947 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007226; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000212; SDB=6.00874329; UDB=6.00435204; IPR=6.00654417; BA=6.00005420; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00015811; XFM=3.00000015; UTC=2017-06-13 20:38:36 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17061320-0017-0000-0000-00003A1968D4 Message-Id: <20170613203818.17399-2-cbostic@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-06-13_09:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1706130351 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1535 Lines: 40 Describe new optional property 'external-signal'. When present in the system device tree an exernal signal is generated on watchdog timeout. Describe new optional property 'no-system-reset'. When present in the system device tree no system reset is to occur on watchdog timeout. System reset in this case is managed by one of the other watchogs available. Signed-off-by: Christopher Bostic --- Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt index c5e74d7..4099ea5 100644 --- a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt @@ -8,9 +8,20 @@ Required properties: - reg: physical base address of the controller and length of memory mapped region +Optional properties: + - external-signal: If the property is present then an external signal is to + be generated on watchdog timeout. If absent, external signal is not + generated. + + - no-system-reset: If the property is present then system will not be reset + on watchdog timeout. In this case one of the other watchdogs will handle + reset. If absent then the watchdog resets the system on timeout. + Example: wdt1: watchdog@1e785000 { compatible = "aspeed,ast2400-wdt"; reg = <0x1e785000 0x1c>; + external-signal; + no-system-reset; }; -- 1.8.2.2