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net: ethernet: ti: am65-cpsw: Add support for SERDES configuration

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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_enable_serdes_phy().

Add new member "serdes_phy" to struct "am65_cpsw_slave_data" to store the
SERDES PHY for each port, if it exists. Use it later while disabling the
SERDES PHY for each port.

Power on and initialize the SerDes PHY in am65_cpsw_nuss_init_slave_ports()
by invoking am65_cpsw_enable_serdes_phy().

Power off the SerDes PHY in am65_cpsw_nuss_remove() by invoking
am65_cpsw_disable_serdes_phy().

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Siddharth Vadapalli 2023-01-04 16:04:32 +05:30 committed by Paolo Abeni
parent 944131fa65
commit dab2b265dd
2 changed files with 69 additions and 0 deletions
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68
drivers/net/ethernet/ti/am65-cpsw-nuss.c
View File

@ -1416,6 +1416,68 @@ static const struct net_device_ops am65_cpsw_nuss_netdev_ops = {
.ndo_setup_tc = am65_cpsw_qos_ndo_setup_tc,
};
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 am65_cpsw_port *port;
struct phy *phy;
int i;
for (i = 0; i < common->port_num; i++) {
port = &common->ports[i];
phy = port->slave.serdes_phy;
if (phy)
am65_cpsw_disable_phy(phy);
}
}
static int am65_cpsw_init_serdes_phy(struct device *dev, struct device_node *port_np,
struct am65_cpsw_port *port)
{
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;
/* Serdes PHY exists. Store it. */
port->slave.serdes_phy = phy;
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)
{
@ -1959,6 +2021,11 @@ static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common)
goto of_node_put;
}
/* Initialize the Serdes PHY for the port */
ret = am65_cpsw_init_serdes_phy(dev, port_np, port);
if (ret)
return ret;
port->slave.mac_only =
of_property_read_bool(port_np, "ti,mac-only");
@ -2878,6 +2945,7 @@ static int am65_cpsw_nuss_remove(struct platform_device *pdev)
*/
am65_cpsw_nuss_cleanup_ndev(common);
am65_cpsw_nuss_phylink_cleanup(common);
am65_cpsw_disable_serdes_phy(common);
of_platform_device_destroy(common->mdio_dev, NULL);

1
drivers/net/ethernet/ti/am65-cpsw-nuss.h
View File

@ -32,6 +32,7 @@ struct am65_cpsw_slave_data {
struct device_node *phy_node;
phy_interface_t phy_if;
struct phy *ifphy;
struct phy *serdes_phy;
bool rx_pause;
bool tx_pause;
u8 mac_addr[ETH_ALEN];