[PATCH RFC net-next 5/5] net: phylink: handle the new is_c45_over_c22 property

Michael Walle
2022-03-23T18:35:15Z

Phylink treats C45 PHYs in a special way and assumes they can switch
their SerDes lanes between modes. This check is done by looking at the
is_c45 property. But there are PHYs, namely the GPY215, which are C45
PHYs but behind a C22 bus. Thus while the PHY is a C45 one, the is_c45
property is not set because it uses indirect MMD access via the C22
registers. Therefore, add the is_c45_over_c22 property to the check,
which indicates this sort of PHY handling.

Signed-off-by: Michael Walle <michael@walle.cc>
---
drivers/net/phy/phylink.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 06943889d747..633cccfbd5f4 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -1369,7 +1369,7 @@ static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy,
* speeds. We really need to know which interface modes the PHY and
* MAC supports to properly work out which linkmodes can be supported.
*/
- if (phy->is_c45 &&
+ if ((phy->is_c45 || phy->is_c45_over_c22) &&
interface != PHY_INTERFACE_MODE_RXAUI &&
interface != PHY_INTERFACE_MODE_XAUI &&
interface != PHY_INTERFACE_MODE_USXGMII)
--
2.30.2