target/linux/ath79/patches-4.14/0038-at803x-disable-delays.patch

   1 Until upstream commit 6d4cd041f0af("net: phy: at803x: disable delay
   2 only for RGMII mode"), delays were not disabled on driver probe
   3 for the Atheros AR803x PHYs, although the RX delay is enabled on
   4 soft and hard reset.
   5
   6 In addition, the TX delay setting is retained on soft-reset.
   7
   8 This patch disables both delays on config init to align the behavior
   9 with kernel 5.1 and higher. It can be safely dropped with kernel 5.1.
  10
  11 --- a/drivers/net/phy/at803x.c
  12 +++ b/drivers/net/phy/at803x.c
  13 @@ -320,6 +320,14 @@ static int at803x_config_init(struct phy
  14         if (ret < 0)
  15                 return ret;
  16
  17 +       /* Disable RX delay */
  18 +       at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_0,
  19 +                               AT803X_DEBUG_RX_CLK_DLY_EN, 0);
  20 +
  21 +       /* Disable TX delay */
  22 +       at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_5,
  23 +                               AT803X_DEBUG_TX_CLK_DLY_EN, 0);
  24 +
  25         if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID ||
  26                         phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
  27                 ret = at803x_enable_rx_delay(phydev);