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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 204FBC43603 for ; Fri, 6 Dec 2019 15:29:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E7B7824659 for ; Fri, 6 Dec 2019 15:29:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=geanix.com header.i=@geanix.com header.b="IlR/k7d4" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726269AbfLFP3a (ORCPT ); Fri, 6 Dec 2019 10:29:30 -0500 Received: from first.geanix.com ([116.203.34.67]:39562 "EHLO first.geanix.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726250AbfLFP3a (ORCPT ); Fri, 6 Dec 2019 10:29:30 -0500 Received: from zen.localdomain (unknown [85.184.140.241]) by first.geanix.com (Postfix) with ESMTPSA id BB7C238C; Fri, 6 Dec 2019 15:29:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=geanix.com; s=first; t=1575646161; bh=ejGfGihfUphVPcy6zWEDcOLewkPn1AjQMYxSDLokwxo=; h=From:To:Cc:Subject:Date; b=IlR/k7d4nifkLbWZd2jcCFrdJgbCMyYI7/OIPqSyxIZ5Fbr6XXRhZQ7byoyV8Wdca 9mz6Krzu/YXYyIAGI0axQ4bjC1nAiiTQP6taYi86d7wtUuA9XAZo3rxg42ctfJZjws 3OyPDTk6yOB54IsOrkzAZPgj2CujGODiBAEcBZ3KATz96lCQY/p2DiApvmWGGYHPbo txEHLiM79VfUpvEm2KvfSrzaOixCLrOSxLFRU2nEbZatLhCdJlD8KwiPisaxdGuvhh CL277PyUTMFiDjZAuKrJ6yZ5JSY9hKOBC/Gx0N4r9D1q1IskB/lXxNsuSUF8D4rSen OWCpyh5U0Wt2w== From: Sean Nyekjaer To: mkl@pengutronix.de, dmurphy@ti.com, linux-can@vger.kernel.org, robh+dt@kernel.org Cc: Sean Nyekjaer , devicetree@vger.kernel.org, martin@geanix.com Subject: [PATCH 1/2] net: m_can: tcan4x5x: add required delay after reset Date: Fri, 6 Dec 2019 16:29:22 +0100 Message-Id: <20191206152923.470980-1-sean@geanix.com> X-Mailer: git-send-email 2.24.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org 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 --- drivers/net/can/m_can/tcan4x5x.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/can/m_can/tcan4x5x.c b/drivers/net/can/m_can/tcan4x5x.c index 6e37c3fd87af..cb5fdb695ec9 100644 --- a/drivers/net/can/m_can/tcan4x5x.c +++ b/drivers/net/can/m_can/tcan4x5x.c @@ -367,6 +367,8 @@ static int tcan4x5x_parse_config(struct m_can_classdev *cdev) 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); -- 2.24.0