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net: phy: dp83869: support mii mode when rgmii strap cfg is used 

The DP83869 PHY on TI's k3-am642-evm supports both MII and RGMII
interfaces and is configured by default to use RGMII interface (strap).
However, the board design allows switching dynamically to MII interface
for testing purposes by applying different set of pinmuxes.

To support switching to MII interface, update the DP83869 PHY driver to
configure OP_MODE_DECODE.RGMII_MII_SEL(bit 5) properly when MII PHY
interface mode is requested.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20230508070359.357474-1-s-vadapalli@ti.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Grygorii Strashko 2023-05-08 12:33:59 +05:30 committed by Paolo Abeni
parent ed23734c23
commit 94e86ef1b8
1 changed files with 12 additions and 1 deletions
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13
drivers/net/phy/dp83869.c
View File

@ -692,8 +692,19 @@ static int dp83869_configure_mode(struct phy_device *phydev,
/* Below init sequence for each operational mode is defined in
* section 9.4.8 of the datasheet.
*/
phy_ctrl_val = dp83869->mode;
if (phydev->interface == PHY_INTERFACE_MODE_MII) {
if (dp83869->mode == DP83869_100M_MEDIA_CONVERT ||
dp83869->mode == DP83869_RGMII_100_BASE) {
phy_ctrl_val |= DP83869_OP_MODE_MII;
} else {
phydev_err(phydev, "selected op-mode is not valid with MII mode\n");
return -EINVAL;
}
}
ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE,
dp83869->mode);
phy_ctrl_val);
if (ret)
return ret;