target/linux/mediatek/patches-4.4/0080-net-next-mediatek-properly-handle-RGMII-modes.patch

   1 From 25eaa5d6483a5899e6bf48b47f762f05c186b4b6 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <john@phrozen.org>
   3 Date: Fri, 22 Apr 2016 11:08:43 +0200
   4 Subject: [PATCH 080/102] net-next: mediatek: properly handle RGMII modes
   5
   6 If an external Gigabit PHY is connected to either of the MACs we need to
   7 be able to tell the PHY to use a delay. Not doing so will result in heavy
   8 packet loss and/or data corruption when using PHYs such as the IC+ IP1001.
   9 We tell the PHY which MII delay mode to use via the devictree.
  10
  11 The ethernet driver needs to be adapted to handle all 3 rgmii-*id modes
  12 in the same way as normal rgmii when setting up the MAC.
  13
  14 Reviewed-by: Andrew Lunn <andrew@lunn.ch>
  15 Signed-off-by: John Crispin <john@phrozen.org>
  16 ---
  17  drivers/net/ethernet/mediatek/mtk_eth_soc.c |    3 +++
  18  1 file changed, 3 insertions(+)
  19
  20 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  21 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  22 @@ -236,6 +236,9 @@ static int mtk_phy_connect(struct mtk_ma
  23                 return -ENODEV;
  24
  25         switch (of_get_phy_mode(np)) {
  26 +       case PHY_INTERFACE_MODE_RGMII_TXID:
  27 +       case PHY_INTERFACE_MODE_RGMII_RXID:
  28 +       case PHY_INTERFACE_MODE_RGMII_ID:
  29         case PHY_INTERFACE_MODE_RGMII:
  30                 ge_mode = 0;
  31                 break;