target/linux/layerscape/patches-5.4/701-net-0379-net-phylink-make-QSGMII-a-valid-PHY-mode-for-in-band.patch

   1 From 5fdc065751ee25688f99da501123f7e7d4020751 Mon Sep 17 00:00:00 2001
   2 From: Vladimir Oltean <vladimir.oltean@nxp.com>
   3 Date: Fri, 22 Nov 2019 13:46:46 +0200
   4 Subject: [PATCH] net: phylink: make QSGMII a valid PHY mode for in-band AN
   5
   6 QSGMII is a SerDes protocol clocked at 5 Gbaud (4 times higher than
   7 SGMII which is clocked at 1.25 Gbaud), with the same 8b/10b encoding and
   8 some extra symbols for synchronization. Logically it offers 4 SGMII
   9 interfaces multiplexed onto the same physical lanes. Each MAC PCS has
  10 its own in-band AN process with the system side of the QSGMII PHY, which
  11 is identical to the regular SGMII AN process.
  12
  13 So allow QSGMII as a valid in-band AN mode, since it is no different
  14 from software perspective from regular SGMII.
  15
  16 Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
  17 ---
  18  drivers/net/phy/phylink.c | 1 +
  19  1 file changed, 1 insertion(+)
  20
  21 --- a/drivers/net/phy/phylink.c
  22 +++ b/drivers/net/phy/phylink.c
  23 @@ -283,6 +283,7 @@ static int phylink_parse_mode(struct phy
  24
  25                 switch (pl->link_config.interface) {
  26                 case PHY_INTERFACE_MODE_SGMII:
  27 +               case PHY_INTERFACE_MODE_QSGMII:
  28                         phylink_set(pl->supported, 10baseT_Half);
  29                         phylink_set(pl->supported, 10baseT_Full);
  30                         phylink_set(pl->supported, 100baseT_Half);