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Subject[PATCH net-next v6 6/6] dsa: lan9303: Migrate to PHYLINK
Date
This patch replaces the adjust_link api with the phylink apis that provide
equivalent functionality.

The remaining functionality from the adjust_link is now covered in the
phylink_mac_link_up api.

Removes:
.adjust_link
Adds:
.phylink_get_caps
.phylink_mac_link_up

Signed-off-by: Jerry Ray <jerry.ray@microchip.com>
---
v5->v6:
- Moved to using port number to identify xMII port for the LAN9303.
v4->v5:
- Added various prep patches to better show the movement of the logic.
v3->v4:
- Reworked the implementation to preserve the adjust_link functionality
by including it in the phylink_mac_link_up api.
v2->v3:
Added back in disabling Turbo Mode on the CPU MII interface.
Removed the unnecessary clearing of the phy supported interfaces.
---
drivers/net/dsa/lan9303-core.c | 101 ++++++++++++++++++++++-----------
1 file changed, 69 insertions(+), 32 deletions(-)

diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c
index 7be4c491e5d9..e514fff81af6 100644
--- a/drivers/net/dsa/lan9303-core.c
+++ b/drivers/net/dsa/lan9303-core.c
@@ -1058,37 +1058,6 @@ static int lan9303_phy_write(struct dsa_switch *ds, int phy, int regnum,
return chip->ops->phy_write(chip, phy, regnum, val);
}

-static void lan9303_adjust_link(struct dsa_switch *ds, int port,
- struct phy_device *phydev)
-{
- int ctl;
-
- /* On this device, we are only interested in doing something here if
- * this is an xMII port. All other ports are 10/100 phys using MDIO
- * to control there link settings.
- */
- if (port != 0)
- return;
-
- ctl = lan9303_phy_read(ds, port, MII_BMCR);
-
- ctl &= ~BMCR_ANENABLE;
-
- if (phydev->speed == SPEED_100)
- ctl |= BMCR_SPEED100;
- else if (phydev->speed == SPEED_10)
- ctl &= ~BMCR_SPEED100;
- else
- dev_err(ds->dev, "unsupported speed: %d\n", phydev->speed);
-
- if (phydev->duplex == DUPLEX_FULL)
- ctl |= BMCR_FULLDPLX;
- else
- ctl &= ~BMCR_FULLDPLX;
-
- lan9303_phy_write(ds, port, MII_BMCR, ctl);
-}
-
static int lan9303_port_enable(struct dsa_switch *ds, int port,
struct phy_device *phy)
{
@@ -1285,13 +1254,81 @@ static int lan9303_port_mdb_del(struct dsa_switch *ds, int port,
return 0;
}

+static void lan9303_phylink_get_caps(struct dsa_switch *ds, int port,
+ struct phylink_config *config)
+{
+ struct lan9303 *chip = ds->priv;
+
+ dev_dbg(chip->dev, "%s(%d) entered.", __func__, port);
+
+ config->mac_capabilities = MAC_10 | MAC_100 | MAC_ASYM_PAUSE |
+ MAC_SYM_PAUSE;
+
+ if (port == 0) {
+ __set_bit(PHY_INTERFACE_MODE_RMII,
+ config->supported_interfaces);
+ __set_bit(PHY_INTERFACE_MODE_MII,
+ config->supported_interfaces);
+ } else {
+ __set_bit(PHY_INTERFACE_MODE_INTERNAL,
+ config->supported_interfaces);
+ /* Compatibility for phylib's default interface type when the
+ * phy-mode property is absent
+ */
+ __set_bit(PHY_INTERFACE_MODE_GMII,
+ config->supported_interfaces);
+ }
+
+ /* This driver does not make use of the speed, duplex, pause or the
+ * advertisement in its mac_config, so it is safe to mark this driver
+ * as non-legacy.
+ */
+ config->legacy_pre_march2020 = false;
+}
+
+static void lan9303_phylink_mac_link_up(struct dsa_switch *ds, int port,
+ unsigned int mode,
+ phy_interface_t interface,
+ struct phy_device *phydev, int speed,
+ int duplex, bool tx_pause,
+ bool rx_pause)
+{
+ u32 ctl;
+
+ /* On this device, we are only interested in doing something here if
+ * this is the xMII port. All other ports are 10/100 phys using MDIO
+ * to control there link settings.
+ */
+ if (port != 0)
+ return;
+
+ ctl = lan9303_phy_read(ds, port, MII_BMCR);
+
+ ctl &= ~BMCR_ANENABLE;
+
+ if (speed == SPEED_100)
+ ctl |= BMCR_SPEED100;
+ else if (speed == SPEED_10)
+ ctl &= ~BMCR_SPEED100;
+ else
+ dev_err(ds->dev, "unsupported speed: %d\n", speed);
+
+ if (duplex == DUPLEX_FULL)
+ ctl |= BMCR_FULLDPLX;
+ else
+ ctl &= ~BMCR_FULLDPLX;
+
+ lan9303_phy_write(ds, port, MII_BMCR, ctl);
+}
+
static const struct dsa_switch_ops lan9303_switch_ops = {
.get_tag_protocol = lan9303_get_tag_protocol,
.setup = lan9303_setup,
.get_strings = lan9303_get_strings,
.phy_read = lan9303_phy_read,
.phy_write = lan9303_phy_write,
- .adjust_link = lan9303_adjust_link,
+ .phylink_get_caps = lan9303_phylink_get_caps,
+ .phylink_mac_link_up = lan9303_phylink_mac_link_up,
.get_ethtool_stats = lan9303_get_ethtool_stats,
.get_sset_count = lan9303_get_sset_count,
.port_enable = lan9303_port_enable,
--
2.17.1
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