netdev - [PATCH v5 net-next 4/9] net: dsa: Pass pcs

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Date:   Mon,  6 Jan 2020 03:34:12 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     davem@...emloft.net, jakub.kicinski@...ronome.com,
        linux@...linux.org.uk, andrew@...n.ch, f.fainelli@...il.com,
        vivien.didelot@...il.com
Cc:     alexandru.marginean@....com, claudiu.manoil@....com,
        xiaoliang.yang_1@....com, yangbo.lu@....com,
        netdev@...r.kernel.org, alexandre.belloni@...tlin.com,
        horatiu.vultur@...rochip.com, UNGLinuxDriver@...rochip.com,
        Vladimir Oltean <vladimir.oltean@....com>
Subject: [PATCH v5 net-next 4/9] net: dsa: Pass pcs_poll flag from driver to PHYLINK

From: Vladimir Oltean <vladimir.oltean@....com>

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@....com>
---
Changes in v5:
- None.

Changes in v4:
- None.

Changes in v3:
- Patch is new.

 include/net/dsa.h | 5 +++++
 net/dsa/port.c    | 1 +
 2 files changed, 6 insertions(+)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 23b1c58656d4..0c39fed8cd99 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -279,6 +279,11 @@ 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;
+
 	size_t num_ports;
 };
 
diff --git a/net/dsa/port.c b/net/dsa/port.c
index ffb5601f7ed6..774facb8d547 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -599,6 +599,7 @@ static int dsa_port_phylink_register(struct dsa_port *dp)
 
 	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);
-- 
2.17.1