Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751482AbdFEPXr (ORCPT ); Mon, 5 Jun 2017 11:23:47 -0400 Received: from shards.monkeyblade.net ([184.105.139.130]:38252 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751112AbdFEPXp (ORCPT ); Mon, 5 Jun 2017 11:23:45 -0400 Date: Mon, 05 Jun 2017 11:23:37 -0400 (EDT) Message-Id: <20170605.112337.1925463603967545555.davem@davemloft.net> To: icenowy@aosc.io Cc: clabbe.montjoie@gmail.com, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com Subject: Re: [PATCH] net-next: stmmac: dwmac-sun8i: ensure the EPHY is properly reseted From: David Miller In-Reply-To: <20170604175323.62124-1-icenowy@aosc.io> References: <20170604175323.62124-1-icenowy@aosc.io> X-Mailer: Mew version 6.7 on Emacs 24.5 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Mon, 05 Jun 2017 07:42:01 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 826 Lines: 19 From: Icenowy Zheng Date: Mon, 5 Jun 2017 01:53:23 +0800 > The EPHY may be already enabled by bootloaders which have Ethernet > capability (e.g. current U-Boot). Thus it should be reseted properly > before doing the enabling sequence in the dwmac-sun8i driver, otherwise > the EMAC reset process may fail if no cable is plugged, and then fail > the dwmac-sun8i probing. > > Tested on Orange Pi PC, One and Zero. All the boards fail to have > dwmac-sun8i probed with "EMAC reset timeout" without cable plugged > before, and with this fix they're now all able to successfully probe the > EMAC without cable plugged and then use the connection after a cable is > hot-plugged in. > > Fixes: 9f93ac8d408 ("net-next: stmmac: Add dwmac-sun8i") > Signed-off-by: Icenowy Zheng Applied, thanks.