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=-9.9 required=3.0 tests=DKIMWL_WL_HIGH,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 1B89EC32771 for ; Wed, 22 Jan 2020 08:02:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E60F82465A for ; Wed, 22 Jan 2020 08:02:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="BjJ7Ofv0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729137AbgAVICM (ORCPT ); Wed, 22 Jan 2020 03:02:12 -0500 Received: from lelv0143.ext.ti.com ([198.47.23.248]:44008 "EHLO lelv0143.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726077AbgAVICK (ORCPT ); Wed, 22 Jan 2020 03:02:10 -0500 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id 00M81sgo059119; Wed, 22 Jan 2020 02:01:54 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1579680114; bh=7UOBwHxmUYxfqiqO99WZtNYVwWL8yFEFOypvW6QAPs4=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=BjJ7Ofv09fQIGGvSb3Z2YQmpzCzQSSXuAXMGB6Cft+lyKzTwTP3bD5V+Rn/6k3LXJ 8b1nUjbeWD8h2Of6LzRrI0rIf23K/32ImENz52Bu8vkFP/CNhTQiJfSWA1em9v4Ir1 pzn1Jq+yh+bigpWCs0xjPo1ZWB88z/YsEDb9MOEk= Received: from DLEE113.ent.ti.com (dlee113.ent.ti.com [157.170.170.24]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 00M81s8C079187 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 22 Jan 2020 02:01:54 -0600 Received: from DLEE102.ent.ti.com (157.170.170.32) by DLEE113.ent.ti.com (157.170.170.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Wed, 22 Jan 2020 02:01:53 -0600 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE102.ent.ti.com (157.170.170.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3 via Frontend Transport; Wed, 22 Jan 2020 02:01:53 -0600 Received: from a0230074-OptiPlex-7010.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 00M81cto007984; Wed, 22 Jan 2020 02:01:49 -0600 From: Faiz Abbas To: , , , , CC: , , , , , , , , , , Subject: [PATCH 2/3] can: m_can: m_can_platform: Add support for enabling transceiver through the STB line Date: Wed, 22 Jan 2020 13:33:09 +0530 Message-ID: <20200122080310.24653-3-faiz_abbas@ti.com> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20200122080310.24653-1-faiz_abbas@ti.com> References: <20200122080310.24653-1-faiz_abbas@ti.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org CAN transceivers on some boards have an STB (standby) line which can be toggled to enable/disable the transceiver. Add support for enabling the transceiver using a GPIO connected to the STB line. Signed-off-by: Faiz Abbas --- drivers/net/can/m_can/m_can_platform.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/net/can/m_can/m_can_platform.c b/drivers/net/can/m_can/m_can_platform.c index 38ea5e600fb8..b4e1423bd5d8 100644 --- a/drivers/net/can/m_can/m_can_platform.c +++ b/drivers/net/can/m_can/m_can_platform.c @@ -6,6 +6,7 @@ // Copyright (C) 2018-19 Texas Instruments Incorporated - http://www.ti.com/ #include +#include #include "m_can.h" @@ -57,6 +58,7 @@ static int m_can_plat_probe(struct platform_device *pdev) { struct m_can_classdev *mcan_class; struct m_can_plat_priv *priv; + struct gpio_desc *stb; struct resource *res; void __iomem *addr; void __iomem *mram_addr; @@ -111,6 +113,16 @@ static int m_can_plat_probe(struct platform_device *pdev) m_can_init_ram(mcan_class); + stb = devm_gpiod_get_optional(&pdev->dev, "stb", GPIOD_OUT_HIGH); + if (IS_ERR(stb)) { + ret = PTR_ERR(stb); + if (ret != -EPROBE_DEFER) + dev_err(&pdev->dev, + "gpio request failed, ret %d\n", ret); + + goto failed_ret; + } + ret = m_can_class_register(mcan_class); failed_ret: -- 2.19.2