Received: by 2002:a25:86ce:0:0:0:0:0 with SMTP id y14csp399137ybm; Wed, 22 May 2019 05:14:36 -0700 (PDT) X-Google-Smtp-Source: APXvYqzoa4Kt9Z+RdkzOE/w4B+lln3tR6UkPUpTewZKUYmvY4C+Zf6Bj71Ejq57DPRKKQOzgw5GR X-Received: by 2002:a63:495e:: with SMTP id y30mr46610187pgk.185.1558527276662; Wed, 22 May 2019 05:14:36 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1558527276; cv=none; d=google.com; s=arc-20160816; b=MPHG3udc+tQ08IfSKfjHp0bUNqF/vNteogo0WJRQPLfP2+XZFwzRvjjeRWbGhDdbqX f6p73i0CM+v3WXMtIvJqJ/7bCbxb43fDgLaC+rVPm9AT1ZQ7BjyLQDqZvMz7+FWs7/Dv 2u48HSXcigksqmDgvtNUkGaEgl5GyN0OHd2J7Rs6Eg3D3INYJVyQghBqNZrNRrKqfLgU okbMIJE0PJ+WPQuiyvGqktA0BGRly3TjHAVrGJSWDPwjXrHdxHMTFlU4TQn7zTrGrp+o 2pVsPGnzQxQxdL37zzcCyyYCiA17XSIt5dylR5LreYe3icjqbGsBrwo1kqf/efFlltRh 0nzw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from; bh=seNsrkikOyHV4cX9ENTtMdHQkCtnOBkXdceezNBoNr4=; b=kO8wbdJtSk8BOdFm6C5ZuzEJnMvdN7W3JV26PwUpPjLBlM4cwUyipK+YLTfVCFnFqH hCSNXtJ5zK5girzQjXNr/uPKR4COlBTP23FcJMZFiWvTD3HcVWPwCew+Sr0sLs/Gzrqx ZreKihrepYEfoWMbH0qRflfyPc0EQSTBjpqLEKuhj4/EFtt8xuL1UFkwOeR2fG9IjTjU w4mg3OIUSHjkMuYx+igrgdNtWDnvR4OfxxUZ0+QpuIT6bDFrRV0Fzh2VMzkKBybs5+/y km35X0kxxxBnjc2iWcmkMrgfV/A1cB5XnzGnOajO09XrS1AkS4S5d865Id6NxMC/1YwQ qB/w== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id p11si5763526pgf.547.2019.05.22.05.14.21; Wed, 22 May 2019 05:14:36 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729289AbfEVMLl (ORCPT + 99 others); Wed, 22 May 2019 08:11:41 -0400 Received: from mx2.mailbox.org ([80.241.60.215]:32428 "EHLO mx2.mailbox.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727975AbfEVMLk (ORCPT ); Wed, 22 May 2019 08:11:40 -0400 Received: from smtp2.mailbox.org (smtp2.mailbox.org [IPv6:2001:67c:2050:105:465:1:2:0]) (using TLSv1.2 with cipher ECDHE-RSA-CHACHA20-POLY1305 (256/256 bits)) (No client certificate requested) by mx2.mailbox.org (Postfix) with ESMTPS id EAA3DA26B7; Wed, 22 May 2019 14:11:38 +0200 (CEST) X-Virus-Scanned: amavisd-new at heinlein-support.de Received: from smtp2.mailbox.org ([80.241.60.241]) by spamfilter02.heinlein-hosting.de (spamfilter02.heinlein-hosting.de [80.241.56.116]) (amavisd-new, port 10030) with ESMTP id SthgKyBj_0Xd; Wed, 22 May 2019 14:11:19 +0200 (CEST) From: Stefan Roese To: linux-serial@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Mika Westerberg , Andy Shevchenko , Yegor Yefremov , Greg Kroah-Hartman , Giulio Benetti Subject: [PATCH 1/2] serial: mctrl_gpio: Check if GPIO property exisits before requesting it Date: Wed, 22 May 2019 14:11:16 +0200 Message-Id: <20190522121117.14347-1-sr@denx.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds a check for the GPIOs property existence, before the GPIO is requested. This fixes an issue seen when the 8250 mctrl_gpio support is added (2nd patch in this patch series) on x86 platforms using ACPI. Please find a details problem description here: https://lkml.org/lkml/2016/8/9/357 Signed-off-by: Stefan Roese Cc: Mika Westerberg Cc: Andy Shevchenko Cc: Yegor Yefremov Cc: Greg Kroah-Hartman Cc: Giulio Benetti --- drivers/tty/serial/serial_mctrl_gpio.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/tty/serial/serial_mctrl_gpio.c b/drivers/tty/serial/serial_mctrl_gpio.c index 39ed56214cd3..cac50b20a119 100644 --- a/drivers/tty/serial/serial_mctrl_gpio.c +++ b/drivers/tty/serial/serial_mctrl_gpio.c @@ -116,6 +116,13 @@ struct mctrl_gpios *mctrl_gpio_init_noauto(struct device *dev, unsigned int idx) for (i = 0; i < UART_GPIO_MAX; i++) { enum gpiod_flags flags; + char *gpio_str; + + /* Check if GPIO property exists and continue if not */ + gpio_str = kasprintf(GFP_KERNEL, "%s-gpios", + mctrl_gpios_desc[i].name); + if (!device_property_present(dev, gpio_str)) + continue; if (mctrl_gpios_desc[i].dir_out) flags = GPIOD_OUT_LOW; -- 2.21.0