target/linux/layerscape/patches-5.4/701-net-0381-net-dsa-Pass-pcs_poll-flag-from-driver-to-PHYLINK.patch

   1 From 3f911800613a3417101563b488c51a9b310ba7fa Mon Sep 17 00:00:00 2001
   2 From: Vladimir Oltean <vladimir.oltean@nxp.com>
   3 Date: Fri, 27 Dec 2019 20:14:57 +0200
   4 Subject: [PATCH] net: dsa: Pass pcs_poll flag from driver to PHYLINK
   5
   6 The DSA drivers that implement .phylink_mac_link_state should normally
   7 register an interrupt for the PCS, from which they should call
   8 phylink_mac_change(). However not all switches implement this, and those
   9 who don't should set this flag in dsa_switch in the .setup callback, so
  10 that PHYLINK will poll for a few ms until the in-band AN link timer
  11 expires and the PCS state settles.
  12
  13 Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
  14
  15 Conflicts:
  16         include/net/dsa.h
  17
  18 trivially with upstream commit 05f294a85235 ("net: dsa: allocate ports
  19 on touch") which was merged in v5.4-rc3.
  20 ---
  21  include/net/dsa.h | 5 +++++
  22  net/dsa/port.c    | 1 +
  23  2 files changed, 6 insertions(+)
  24
  25 --- a/include/net/dsa.h
  26 +++ b/include/net/dsa.h
  27 @@ -291,6 +291,11 @@ struct dsa_switch {
  28          */
  29         bool                    vlan_filtering;
  30
  31 +       /* MAC PCS does not provide link state change interrupt, and requires
  32 +        * polling. Flag passed on to PHYLINK.
  33 +        */
  34 +       bool                    pcs_poll;
  35 +
  36         /* Dynamically allocated ports, keep last */
  37         size_t num_ports;
  38         struct dsa_port ports[];
  39 --- a/net/dsa/port.c
  40 +++ b/net/dsa/port.c
  41 @@ -639,6 +639,7 @@ static int dsa_port_phylink_register(str
  42
  43         dp->pl_config.dev = ds->dev;
  44         dp->pl_config.type = PHYLINK_DEV;
  45 +       dp->pl_config.pcs_poll = ds->pcs_poll;
  46
  47         dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn),
  48                                 mode, &dsa_port_phylink_mac_ops);