Use PHY framework APIs to initialize the SERDES PHY connected to CPSW MAC.
Define the functions am65_cpsw_disable_phy(), am65_cpsw_enable_phy(),
am65_cpsw_disable_serdes_phy() and am65_cpsw_init_serdes_phy().
Power on and initialize the SerDes PHY in am65_cpsw_nuss_init_slave_ports()
by invoking am65_cpsw_init_serdes_phy().
Power off the SerDes PHY in am65_cpsw_nuss_remove() by invoking
am65_cpsw_disable_serdes_phy().
Signed-off-by: Siddharth Vadapalli <[email protected]>
---
drivers/net/ethernet/ti/am65-cpsw-nuss.c | 65 ++++++++++++++++++++++++
1 file changed, 65 insertions(+)
diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index 91e294afc3ad..519ebd371dd8 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -1403,6 +1403,65 @@ static const struct net_device_ops am65_cpsw_nuss_netdev_ops = {
.ndo_get_devlink_port = am65_cpsw_ndo_get_devlink_port,
};
+static void am65_cpsw_disable_phy(struct phy *phy)
+{
+ phy_power_off(phy);
+ phy_exit(phy);
+}
+
+static int am65_cpsw_enable_phy(struct phy *phy)
+{
+ int ret;
+
+ ret = phy_init(phy);
+ if (ret < 0)
+ return ret;
+
+ ret = phy_power_on(phy);
+ if (ret < 0) {
+ phy_exit(phy);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void am65_cpsw_disable_serdes_phy(struct am65_cpsw_common *common)
+{
+ struct device_node *node, *port_np;
+ struct device *dev = common->dev;
+ const char *name = "serdes-phy";
+ struct phy *phy;
+
+ node = of_get_child_by_name(dev->of_node, "ethernet-ports");
+
+ for_each_child_of_node(node, port_np) {
+ phy = devm_of_phy_get(dev, port_np, name);
+ am65_cpsw_disable_phy(phy);
+ }
+}
+
+static int am65_cpsw_init_serdes_phy(struct device *dev, struct device_node *port_np)
+{
+ const char *name = "serdes-phy";
+ struct phy *phy;
+ int ret;
+
+ phy = devm_of_phy_get(dev, port_np, name);
+ if (PTR_ERR(phy) == -ENODEV)
+ return 0;
+
+ ret = am65_cpsw_enable_phy(phy);
+ if (ret < 0)
+ goto err_phy;
+
+ return 0;
+
+err_phy:
+ devm_phy_put(dev, phy);
+ return ret;
+}
+
static void am65_cpsw_nuss_mac_config(struct phylink_config *config, unsigned int mode,
const struct phylink_link_state *state)
{
@@ -1880,6 +1939,11 @@ static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common)
goto of_node_put;
}
+ /* Initialize the phy for the port */
+ ret = am65_cpsw_init_serdes_phy(dev, port_np);
+ if (ret)
+ return ret;
+
port->slave.mac_only =
of_property_read_bool(port_np, "ti,mac-only");
@@ -2833,6 +2897,7 @@ static int am65_cpsw_nuss_remove(struct platform_device *pdev)
am65_cpsw_nuss_phylink_cleanup(common);
am65_cpsw_unregister_devlink(common);
+ am65_cpsw_disable_serdes_phy(common);
am65_cpsw_unregister_notifiers(common);
/* must unregister ndevs here because DD release_driver routine calls
--
2.25.1