From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Schmitz Subject: [PATCH 08/10] net: ax88796: Make reset more robust on AX88796B Date: Tue, 17 Apr 2018 10:04:43 +1200 Message-ID: <1523916285-6057-9-git-send-email-schmitzmic@gmail.com> References: <1523916285-6057-1-git-send-email-schmitzmic@gmail.com> Return-path: In-Reply-To: <1523916285-6057-1-git-send-email-schmitzmic@gmail.com> Sender: netdev-owner@vger.kernel.org To: netdev@vger.kernel.org Cc: linux-m68k@vger.kernel.org, Michael.Karcher@fu-berlin.de, John Paul Adrian Glaubitz , Michael Karcher List-Id: linux-m68k@vger.kernel.org From: John Paul Adrian Glaubitz The AX88796B as installed on the X-Surf-100 does not recognize a MII reset request if the previous write to the MII control register also was a reset request. So a dummy write to the control register makes the soft reset in the PHY initialization code work. Signed-off-by: Michael Karcher --- drivers/net/ethernet/8390/ax88796.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/net/ethernet/8390/ax88796.c b/drivers/net/ethernet/8390/ax88796.c index 6af9aca..a2f9a09 100644 --- a/drivers/net/ethernet/8390/ax88796.c +++ b/drivers/net/ethernet/8390/ax88796.c @@ -374,6 +374,10 @@ static int ax_mii_probe(struct net_device *dev) return -ENODEV; } + /* write a non-reset pattern to the control register to + * re-arm the reset request detection logic (needed on AX88796B) + */ + phy_write(phy_dev, MII_BMCR, 0); ret = phy_connect_direct(dev, phy_dev, ax_handle_link_change, PHY_INTERFACE_MODE_MII); if (ret) { -- 1.7.0.4