mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-01 06:33:07 +00:00
Code Issues Releases Wiki Activity

net: mvpp2: add support for mii

Browse source 
Currently, mvpp2 only supports RGMII. This commit adds support for MII.
The description in Marvell's functional specification seems to be wrong.
To enable MII, we need to set GENCONF_CTRL0_PORT3_RGMII, while for RGMII
we need to clear it. This is also how U-Boot handles it.

Signed-off-by: Stefan Eichenberger <eichest@gmail.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Marcin Wojtas <mw@semihalf.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/20231212141200.62579-1-eichest@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Stefan Eichenberger 2023-12-12 15:12:00 +01:00 committed by Paolo Abeni
parent 00b1b2296b
commit 1b666016d0
1 changed files with 18 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
View file

@ -1513,10 +1513,21 @@ static void mvpp22_gop_init_rgmii(struct mvpp2_port *port)
regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val);
regmap_read(priv->sysctrl_base, GENCONF_CTRL0, &val);
if (port->gop_id == 2)
if (port->gop_id == 2) {
val |= GENCONF_CTRL0_PORT2_RGMII;
else if (port->gop_id == 3)
} else if (port->gop_id == 3) {
val |= GENCONF_CTRL0_PORT3_RGMII_MII;
/* According to the specification, GENCONF_CTRL0_PORT3_RGMII
* should be set to 1 for RGMII and 0 for MII. However, tests
* show that it is the other way around. This is also what
* U-Boot does for mvpp2, so it is assumed to be correct.
*/
if (port->phy_interface == PHY_INTERFACE_MODE_MII)
val |= GENCONF_CTRL0_PORT3_RGMII;
else
val &= ~GENCONF_CTRL0_PORT3_RGMII;
}
regmap_write(priv->sysctrl_base, GENCONF_CTRL0, val);
}
@ -1615,6 +1626,7 @@ static int mvpp22_gop_init(struct mvpp2_port *port, phy_interface_t interface)
return 0;
switch (interface) {
case PHY_INTERFACE_MODE_MII:
case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_RGMII_ID:
case PHY_INTERFACE_MODE_RGMII_RXID:
@ -6915,8 +6927,11 @@ static int mvpp2_port_probe(struct platform_device *pdev,
MAC_10000FD;
}
if (mvpp2_port_supports_rgmii(port))
if (mvpp2_port_supports_rgmii(port)) {
phy_interface_set_rgmii(port->phylink_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_MII,
port->phylink_config.supported_interfaces);
}
if (comphy) {
/* If a COMPHY is present, we can support any of the