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From 3f911800613a3417101563b488c51a9b310ba7fa Mon Sep 17 00:00:00 2001
From: Vladimir Oltean <vladimir.oltean@nxp.com>
Date: Fri, 27 Dec 2019 20:14:57 +0200
Subject: [PATCH] net: dsa: Pass pcs_poll flag from driver to PHYLINK
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>
Conflicts:
include/net/dsa.h
trivially with upstream commit 05f294a85235 ("net: dsa: allocate ports
on touch") which was merged in v5.4-rc3.
---
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
@@ -284,6 +284,11 @@ 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;
+
/* Dynamically allocated ports, keep last */
size_t num_ports;
struct dsa_port ports[];
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -639,6 +639,7 @@ 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);
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