From patchwork Thu Sep 24 10:52:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= X-Patchwork-Id: 258952 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E1F53C4741F for ; Thu, 24 Sep 2020 10:53:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AD8E3239A1 for ; Thu, 24 Sep 2020 10:53:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726573AbgIXKxF (ORCPT ); Thu, 24 Sep 2020 06:53:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52562 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726701AbgIXKxF (ORCPT ); Thu, 24 Sep 2020 06:53:05 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0E31FC0613D3 for ; Thu, 24 Sep 2020 03:53:05 -0700 (PDT) Received: from pty.hi.pengutronix.de ([2001:67c:670:100:1d::c5]) by metis.ext.pengutronix.de with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kLOs0-00062S-SC; Thu, 24 Sep 2020 12:53:00 +0200 Received: from ukl by pty.hi.pengutronix.de with local (Exim 4.89) (envelope-from ) id 1kLOrz-0005Ch-6e; Thu, 24 Sep 2020 12:52:59 +0200 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: Alexandre Belloni , Qiang Zhao , Bruno Thomsen Cc: linux-rtc@vger.kernel.org, a.zummo@towertech.it, linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, robh+dt@kernel.org, kernel@pengutronix.de, Wim Van Sebroeck , Guenter Roeck Subject: [PATCH 2/2] [RFC] rtc: pcf2127: only use watchdog when explicitly available Date: Thu, 24 Sep 2020 12:52:56 +0200 Message-Id: <20200924105256.18162-3-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200924105256.18162-1-u.kleine-koenig@pengutronix.de> References: <20200924074715.GT9675@piout.net> <20200924105256.18162-1-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::c5 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-watchdog@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Most boards using the pcf2127 chip (in my bubble) don't make use of the watchdog functionality and the respective output is not connected. The effect on such a board is that there is a watchdog device provided that doesn't work. So only register the watchdog if the device tree has a "has-watchdog" property. Signed-off-by: Uwe Kleine-König --- drivers/rtc/rtc-pcf2127.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c index 5b1f1949b5e5..8bd89d641578 100644 --- a/drivers/rtc/rtc-pcf2127.c +++ b/drivers/rtc/rtc-pcf2127.c @@ -340,7 +340,8 @@ static int pcf2127_watchdog_init(struct device *dev, struct pcf2127 *pcf2127) u32 wdd_timeout; int ret; - if (!IS_ENABLED(CONFIG_WATCHDOG)) + if (!IS_ENABLED(CONFIG_WATCHDOG) || + !device_property_read_bool(dev, "has-watchdog")) return 0; pcf2127->wdd.parent = dev;