[RFC PATCH v4 net-next 07/23] net: dsa: ocelot: felix: add per-device-per-port quirks

[Colin Foster <colin.foster@in-advantage.com>]

Initial Felix-driver products (VSC9959 and VSC9953) both had quirks
where the PCS was in charge of rate adaptation. In the case of the
VSC7512 there is a differnce in that some ports (ports 0-3) don't have
a PCS and others might have different quirks based on how they are
configured.

This adds a generic method by which any port can have any quirks that
are handled by each device's driver.

Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
---
 drivers/net/dsa/ocelot/felix.c           | 20 +++++++++++++++++---
 drivers/net/dsa/ocelot/felix.h           |  4 ++++
 drivers/net/dsa/ocelot/felix_vsc9959.c   |  1 +
 drivers/net/dsa/ocelot/seville_vsc9953.c |  1 +
 4 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index 615f6b84c688..f53db233148d 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c
@@ -824,14 +824,25 @@ static void felix_phylink_mac_config(struct dsa_switch *ds, int port,
 		phylink_set_pcs(dp->pl, &felix->pcs[port]->pcs);
 }
 
+unsigned long felix_quirks_have_rate_adaptation(struct ocelot *ocelot,
+						int port)
+{
+	return FELIX_MAC_QUIRKS;
+}
+EXPORT_SYMBOL(felix_quirks_have_rate_adaptation);
+
 static void felix_phylink_mac_link_down(struct dsa_switch *ds, int port,
 					unsigned int link_an_mode,
 					phy_interface_t interface)
 {
 	struct ocelot *ocelot = ds->priv;
+	unsigned long quirks;
+	struct felix *felix;
 
+	felix = ocelot_to_felix(ocelot);
+	quirks = felix->info->get_quirk_for_port(ocelot, port);
 	ocelot_phylink_mac_link_down(ocelot, port, link_an_mode, interface,
-				     FELIX_MAC_QUIRKS);
+				     quirks);
 }
 
 static void felix_phylink_mac_link_up(struct dsa_switch *ds, int port,
@@ -842,11 +853,14 @@ static void felix_phylink_mac_link_up(struct dsa_switch *ds, int port,
 				      bool tx_pause, bool rx_pause)
 {
 	struct ocelot *ocelot = ds->priv;
-	struct felix *felix = ocelot_to_felix(ocelot);
+	unsigned long quirks;
+	struct felix *felix;
 
+	felix = ocelot_to_felix(ocelot);
+	quirks = felix->info->get_quirk_for_port(ocelot, port);
 	ocelot_phylink_mac_link_up(ocelot, port, phydev, link_an_mode,
 				   interface, speed, duplex, tx_pause, rx_pause,
-				   FELIX_MAC_QUIRKS);
+				   quirks);
 
 	if (felix->info->port_sched_speed_set)
 		felix->info->port_sched_speed_set(ocelot, port, speed);
diff --git a/drivers/net/dsa/ocelot/felix.h b/drivers/net/dsa/ocelot/felix.h
index 81a86bd60f03..b5fa5b7325b1 100644
--- a/drivers/net/dsa/ocelot/felix.h
+++ b/drivers/net/dsa/ocelot/felix.h
@@ -48,6 +48,7 @@ struct felix_info {
 					u32 speed);
 	struct regmap *(*init_regmap)(struct ocelot *ocelot,
 				      struct resource *res);
+	unsigned long (*get_quirk_for_port)(struct ocelot *ocelot, int port);
 };
 
 extern const struct dsa_switch_ops felix_switch_ops;
@@ -68,4 +69,7 @@ struct felix {
 struct net_device *felix_port_to_netdev(struct ocelot *ocelot, int port);
 int felix_netdev_to_port(struct net_device *dev);
 
+unsigned long felix_quirks_have_rate_adaptation(struct ocelot *ocelot,
+						int port);
+
 #endif
diff --git a/drivers/net/dsa/ocelot/felix_vsc9959.c b/drivers/net/dsa/ocelot/felix_vsc9959.c
index 789e1ff0d13b..5056f39dc47e 100644
--- a/drivers/net/dsa/ocelot/felix_vsc9959.c
+++ b/drivers/net/dsa/ocelot/felix_vsc9959.c
@@ -1368,6 +1368,7 @@ static const struct felix_info felix_info_vsc9959 = {
 	.port_setup_tc		= vsc9959_port_setup_tc,
 	.port_sched_speed_set	= vsc9959_sched_speed_set,
 	.init_regmap		= ocelot_regmap_init,
+	.get_quirk_for_port	= felix_quirks_have_rate_adaptation,
 };
 
 static irqreturn_t felix_irq_handler(int irq, void *data)
diff --git a/drivers/net/dsa/ocelot/seville_vsc9953.c b/drivers/net/dsa/ocelot/seville_vsc9953.c
index 47da279a8ff7..362ba66401d8 100644
--- a/drivers/net/dsa/ocelot/seville_vsc9953.c
+++ b/drivers/net/dsa/ocelot/seville_vsc9953.c
@@ -1088,6 +1088,7 @@ static const struct felix_info seville_info_vsc9953 = {
 	.phylink_validate	= vsc9953_phylink_validate,
 	.prevalidate_phy_mode	= vsc9953_prevalidate_phy_mode,
 	.init_regmap		= ocelot_regmap_init,
+	.get_quirk_for_port	= felix_quirks_have_rate_adaptation,
 };
 
 static int seville_probe(struct platform_device *pdev)
-- 
2.25.1