From mboxrd@z Thu Jan 1 00:00:00 1970 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 5DB29C2D0DA for ; Sun, 29 Dec 2019 18:00:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 388A521744 for ; Sun, 29 Dec 2019 18:00:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577642432; bh=h4A/W2FN6BEUrDzG+BkEQyMdloFer4V9IMLr+UZSZDI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=GB79+wf4SvGvqF/CZDapJ8rger6UY140VETgOPXGiJed5kE4j0jYLpZ+YdCbOX9Y4 tuSS8qdQRc0RpPzL6Tf9ZUIaeKcNM1BS9gpz599HCN00CbbqIV3d+X6rrPDCcwCFF9 LoIhZFMSWWPy+DnDMNGGrpZtvFkM+7SgReh7dd7k= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733234AbfL2SA1 (ORCPT ); Sun, 29 Dec 2019 13:00:27 -0500 Received: from mail.kernel.org ([198.145.29.99]:47790 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732788AbfL2R5U (ORCPT ); Sun, 29 Dec 2019 12:57:20 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5B2EE22B48; Sun, 29 Dec 2019 17:57:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577642239; bh=h4A/W2FN6BEUrDzG+BkEQyMdloFer4V9IMLr+UZSZDI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xqF7BdxvtxgZFZi6Dmm2vjPWZVBuz7juN7p2ayMtW14jKy38ILppR3bEfZEOfwI8w SSsyHuD/rIcpsYay3Nlevhae+ihQnlkyXHdvThhogl770MkAz3QmxKmgiHOdpPXnh7 3wPU7f+4w+bWfTn2AZQJR669yhIcPec+1zLnq8BY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sean Nyekjaer , Dan Murphy , Marc Kleine-Budde Subject: [PATCH 5.4 373/434] can: m_can: tcan4x5x: add required delay after reset Date: Sun, 29 Dec 2019 18:27:06 +0100 Message-Id: <20191229172726.808908094@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191229172702.393141737@linuxfoundation.org> References: <20191229172702.393141737@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Sean Nyekjaer commit 60552253e29c8860ee5bf1e6064591b0917c0394 upstream. According to section "8.3.8 RST Pin" in the datasheet we are required to wait >700us after the device is reset. Signed-off-by: Sean Nyekjaer Acked-by: Dan Murphy Cc: linux-stable # >= v5.4 Signed-off-by: Marc Kleine-Budde Signed-off-by: Greg Kroah-Hartman --- drivers/net/can/m_can/tcan4x5x.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/net/can/m_can/tcan4x5x.c +++ b/drivers/net/can/m_can/tcan4x5x.c @@ -354,6 +354,8 @@ static int tcan4x5x_parse_config(struct if (IS_ERR(tcan4x5x->reset_gpio)) tcan4x5x->reset_gpio = NULL; + usleep_range(700, 1000); + tcan4x5x->device_state_gpio = devm_gpiod_get_optional(cdev->dev, "device-state", GPIOD_IN);