From mboxrd@z Thu Jan 1 00:00:00 1970 From: Weidong Wang Subject: [RESEND PATCH net-next] phy: keep the BCMR_LOOPBACK bit while setup forced mode Date: Wed, 13 Apr 2016 19:59:04 +0800 Message-ID: <570E3488.9060403@huawei.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Cc: , To: David Miller , Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org When tested the PHY SGMII Loopback,: 1.set the LOOPBACK bit, 2.set the autoneg to AUTONEG_DISABLE, it calls the genphy_setup_forced which will clear the bit. So just keep the LOOPBACK bit while setup forced mode. Signed-off-by: Weidong Wang --- drivers/net/phy/phy_device.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index e551f3a..8da4b80 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -1124,7 +1124,9 @@ static int genphy_config_advert(struct phy_device *phydev) int genphy_setup_forced(struct phy_device *phydev) { int ctl = 0; + int val = phy_read(phydev, MII_BMCR); + ctl |= val & BMCR_LOOPBACK; phydev->pause = 0; phydev->asym_pause = 0; -- 2.7.0