From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Lunn Subject: [PATCHv2 net-next 1/2] net: dsa: mv88e6xxx: Workaround missing PHY ID on mv88e6390 Date: Wed, 1 Feb 2017 03:40:05 +0100 Message-ID: <1485916806-27299-2-git-send-email-andrew@lunn.ch> References: <1485916806-27299-1-git-send-email-andrew@lunn.ch> Cc: Vivien Didelot , netdev , Andrew Lunn To: David Miller Return-path: Received: from vps0.lunn.ch ([178.209.37.122]:51907 "EHLO vps0.lunn.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750796AbdBACkc (ORCPT ); Tue, 31 Jan 2017 21:40:32 -0500 In-Reply-To: <1485916806-27299-1-git-send-email-andrew@lunn.ch> Sender: netdev-owner@vger.kernel.org List-ID: The internal PHYs of the mv88e6390 do not have a model ID. Trap any calls to the ID register, and if it is zero, return the ID for the mv88e6390. The Marvell PHY driver can then bind to this ID. Signed-off-by: Andrew Lunn --- drivers/net/dsa/mv88e6xxx/chip.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c index bf385377a461..29190303ace0 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.c +++ b/drivers/net/dsa/mv88e6xxx/chip.c @@ -2930,6 +2930,14 @@ static int mv88e6xxx_mdio_read(struct mii_bus *bus, int phy, int reg) err = chip->info->ops->phy_read(chip, bus, phy, reg, &val); mutex_unlock(&chip->reg_lock); + if (reg == MII_PHYSID2) { + /* Some internal PHYS don't have a model number. Use + * the mv88e6390 family model number instead. + */ + if (!(val & 0x3f0)) + val |= PORT_SWITCH_ID_PROD_NUM_6390; + } + return err ? err : val; } -- 2.11.0