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net: stmmac: introduce pcs_init/pcs_exit stmmac operations

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Introduce a mechanism whereby platforms can create their PCS instances
prior to the network device being published to userspace, but after
some of the core stmmac initialisation has been completed. This means
that the data structures that platforms need will be available.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Co-developed-by: Romain Gantois <romain.gantois@bootlin.com>
Signed-off-by: Romain Gantois <romain.gantois@bootlin.com>
Reviewed-by: Hariprasad Kelam <hkelam@marvell.com>
Link: https://lore.kernel.org/r/20240513-rzn1-gmac1-v7-4-6acf58b5440d@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Russell King (Oracle) 2024-05-13 09:25:15 +02:00 committed by Jakub Kicinski
parent f9cdff1bda
commit f0ef433fc2
2 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
View File

@ -505,7 +505,10 @@ int stmmac_pcs_setup(struct net_device *ndev)
priv = netdev_priv(ndev);
mode = priv->plat->phy_interface;
if (priv->plat->mdio_bus_data && priv->plat->mdio_bus_data->has_xpcs) {
if (priv->plat->pcs_init) {
ret = priv->plat->pcs_init(priv);
} else if (priv->plat->mdio_bus_data &&
priv->plat->mdio_bus_data->has_xpcs) {
/* Try to probe the XPCS by scanning all addresses */
for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
xpcs = xpcs_create_mdiodev(priv->mii, addr, mode);
@ -533,6 +536,9 @@ void stmmac_pcs_clean(struct net_device *ndev)
{
struct stmmac_priv *priv = netdev_priv(ndev);
if (priv->plat->pcs_exit)
priv->plat->pcs_exit(priv);
if (!priv->hw->xpcs)
return;

2
include/linux/stmmac.h
View File

@ -285,6 +285,8 @@ struct plat_stmmacenet_data {
int (*crosststamp)(ktime_t *device, struct system_counterval_t *system,
void *ctx);
void (*dump_debug_regs)(void *priv);
int (*pcs_init)(struct stmmac_priv *priv);
void (*pcs_exit)(struct stmmac_priv *priv);
void *bsp_priv;
struct clk *stmmac_clk;
struct clk *pclk;