From: Vladimir Oltean <vladimir.oltean@nxp.com>
Date: Mon, 6 Jan 2020 03:34:12 +0200
Subject: net: dsa: Pass pcs_poll flag from driver to PHYLINK
Git-commit: 787cac3f5a650fd3184a41c5a27a2fe9ded833aa
Patch-mainline: v5.6-rc1
References: jsc#SLE-9263
The DSA drivers that implement .phylink_mac_link_state should normally
register an interrupt for the PCS, from which they should call
phylink_mac_change(). However not all switches implement this, and those
who don't should set this flag in dsa_switch in the .setup callback, so
that PHYLINK will poll for a few ms until the in-band AN link timer
expires and the PCS state settles.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
include/net/dsa.h | 5 +++++
net/dsa/port.c | 1 +
2 files changed, 6 insertions(+)
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -275,6 +275,11 @@ struct dsa_switch {
*/
bool vlan_filtering;
+ /* MAC PCS does not provide link state change interrupt, and requires
+ * polling. Flag passed on to PHYLINK.
+ */
+ bool pcs_poll;
+
unsigned long *bitmap;
unsigned long _bitmap;
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -612,6 +612,7 @@ static int dsa_port_phylink_register(str
dp->pl_config.dev = ds->dev;
dp->pl_config.type = PHYLINK_DEV;
+ dp->pl_config.pcs_poll = ds->pcs_poll;
dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn),
mode, &dsa_port_phylink_mac_ops);