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net: stmmac: Add DW XPCS specified via "pcs-handle" support

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Recently the DW XPCS DT-bindings have been introduced and the DW XPCS
driver has been altered to support the DW XPCS registered as a platform
device. In order to have the DW XPCS DT-device accessed from the STMMAC
driver let's alter the STMMAC PCS-setup procedure to support the
"pcs-handle" property containing the phandle reference to the DW XPCS
device DT-node. The respective fwnode will be then passed to the
xpcs_create_fwnode() function which in its turn will create the DW XPCS
descriptor utilized in the main driver for the PCS-related setups.

Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Serge Semin 2024-07-01 21:28:41 +03:00 committed by David S. Miller
parent 351066bad6
commit 357768c7e7
1 changed files with 9 additions and 4 deletions
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13
drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
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@ -497,15 +497,22 @@ int stmmac_mdio_reset(struct mii_bus *bus)
int stmmac_pcs_setup(struct net_device *ndev)
{
struct fwnode_handle *devnode, *pcsnode;
struct dw_xpcs *xpcs = NULL;
struct stmmac_priv *priv;
int addr, mode, ret;
priv = netdev_priv(ndev);
mode = priv->plat->phy_interface;
devnode = priv->plat->port_node;
if (priv->plat->pcs_init) {
ret = priv->plat->pcs_init(priv);
} else if (fwnode_property_present(devnode, "pcs-handle")) {
pcsnode = fwnode_find_reference(devnode, "pcs-handle", 0);
xpcs = xpcs_create_fwnode(pcsnode, mode);
fwnode_handle_put(pcsnode);
ret = PTR_ERR_OR_ZERO(xpcs);
} else if (priv->plat->mdio_bus_data &&
priv->plat->mdio_bus_data->pcs_mask) {
addr = ffs(priv->plat->mdio_bus_data->pcs_mask) - 1;
@ -515,10 +522,8 @@ int stmmac_pcs_setup(struct net_device *ndev)
return 0;
}
if (ret) {
dev_warn(priv->device, "No xPCS found\n");
return ret;
}
if (ret)
return dev_err_probe(priv->device, ret, "No xPCS found\n");
priv->hw->xpcs = xpcs;