From patchwork Mon Feb 24 15:36:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Saenz Julienne X-Patchwork-Id: 1243273 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=suse.de Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 48R5l42jZ8z9sRR for ; Tue, 25 Feb 2020 02:36:32 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727849AbgBXPg2 (ORCPT ); Mon, 24 Feb 2020 10:36:28 -0500 Received: from mx2.suse.de ([195.135.220.15]:53008 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727359AbgBXPg2 (ORCPT ); Mon, 24 Feb 2020 10:36:28 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id A7D12ADC2; Mon, 24 Feb 2020 15:36:26 +0000 (UTC) From: Nicolas Saenz Julienne To: Doug Berger , Florian Fainelli , "David S. Miller" , Stefan Wahren Cc: Nicolas Saenz Julienne , bcm-kernel-feedback-list@broadcom.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] net: bcmgenet: Clear ID_MODE_DIS in EXT_RGMII_OOB_CTRL when not needed Date: Mon, 24 Feb 2020 16:36:09 +0100 Message-Id: <20200224153609.24948-1-nsaenzjulienne@suse.de> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Outdated Raspberry Pi 4 firmware might configure the external PHY as rgmii although the kernel currently sets it as rgmii-rxid. This makes connections unreliable as ID_MODE_DIS is left enabled. To avoid this, explicitly clear that bit whenever we don't need it. Signed-off-by: Nicolas Saenz Julienne Fixes: da38802211cc ("net: bcmgenet: Add RGMII_RXID support") --- drivers/net/ethernet/broadcom/genet/bcmmii.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c index 6392a2530183..10244941a7a6 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmmii.c +++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c @@ -294,6 +294,7 @@ int bcmgenet_mii_config(struct net_device *dev, bool init) */ if (priv->ext_phy) { reg = bcmgenet_ext_readl(priv, EXT_RGMII_OOB_CTRL); + reg &= ~ID_MODE_DIS; reg |= id_mode_dis; if (GENET_IS_V1(priv) || GENET_IS_V2(priv) || GENET_IS_V3(priv)) reg |= RGMII_MODE_EN_V123;