From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754182AbdFWDUR (ORCPT ); Thu, 22 Jun 2017 23:20:17 -0400 Received: from vps0.lunn.ch ([178.209.37.122]:60615 "EHLO vps0.lunn.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753925AbdFWDUP (ORCPT ); Thu, 22 Jun 2017 23:20:15 -0400 Date: Fri, 23 Jun 2017 05:20:11 +0200 From: Andrew Lunn To: Lin Yun Sheng Cc: davem@davemloft.net, f.fainelli@gmail.com, huangdaode@hisilicon.com, xuwei5@hisilicon.com, liguozhu@hisilicon.com, Yisen.Zhuang@huawei.com, gabriele.paoloni@huawei.com, john.garry@huawei.com, linuxarm@huawei.com, salil.mehta@huawei.com, lipeng321@huawei.com, tremyfr@gmail.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH NET 2/2] net: hns: Use phy_driver to setup Phy loopback Message-ID: <20170623032011.GB5432@lunn.ch> References: <1498121613-64572-1-git-send-email-linyunsheng@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1498121613-64572-1-git-send-email-linyunsheng@huawei.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 22, 2017 at 04:53:33PM +0800, Lin Yun Sheng wrote: > Use function set_loopback in phy_driver to setup phy loopback > when doing ethtool self test. > > Signed-off-by: Lin Yun Sheng > --- > drivers/net/ethernet/hisilicon/hns/hns_ethtool.c | 64 ++++-------------------- > 1 file changed, 10 insertions(+), 54 deletions(-) > > diff --git a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c > index e95795b..660b51e 100644 > --- a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c > +++ b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c > @@ -259,66 +259,22 @@ static int hns_nic_set_link_ksettings(struct net_device *net_dev, > > static int hns_nic_config_phy_loopback(struct phy_device *phy_dev, u8 en) > { > -#define COPPER_CONTROL_REG 0 > -#define PHY_POWER_DOWN BIT(11) > -#define PHY_LOOP_BACK BIT(14) > - u16 val = 0; > > - if (phy_dev->is_c45) /* c45 branch adding for XGE PHY */ > + if (phy_dev->is_c45 || !phy_dev->drv) > + return -ENOTSUPP; > + > + if (!phy_dev->drv->resume || !phy_dev->drv->suspend || > + !phy_dev->drv->set_loopback) > return -ENOTSUPP; No, i said to have a function is phy.c which does this check. The phy core needs to keep track of if loopback is already enabled, and return an error if it is attempted to turn it on twice, or disable it when it is not enabled. Andrew