[PATCH net-next 2/4] net: phy: motorcomm: Support YT8531S PHY in YT6801 Ethernet controller

Yao Zi
2025-10-14T16:49:48Z

YT6801's internal PHY is confirmed as a GMII-capable variant of YT8531S
by a previous series[1] and reading PHY ID. Add support for
PHY_INTERFACE_MODE_INTERNAL for YT8531S to allow the Ethernet driver to
reuse the PHY code for its internal PHY.

Link: https://lore.kernel.org/all/a48d76ac-db08-46d5-9528-f046a7b541dc@motor-comm.com/ # [1]
Co-developed-by: Frank Sae <Frank.Sae@motor-comm.com>
Signed-off-by: Frank Sae <Frank.Sae@motor-comm.com>
Signed-off-by: Yao Zi <ziyao@disroot.org>
---
drivers/net/phy/motorcomm.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/net/phy/motorcomm.c b/drivers/net/phy/motorcomm.c
index a3593e663059..e478e4f51755 100644
--- a/drivers/net/phy/motorcomm.c
+++ b/drivers/net/phy/motorcomm.c
@@ -910,6 +910,10 @@ static int ytphy_rgmii_clk_delay_config(struct phy_device *phydev)
val |= FIELD_PREP(YT8521_RC1R_RX_DELAY_MASK, rx_reg) |
FIELD_PREP(YT8521_RC1R_GE_TX_DELAY_MASK, tx_reg);
break;
+ case PHY_INTERFACE_MODE_INTERNAL:
+ if (phydev->drv->phy_id != PHY_ID_YT8531S)
+ return -EOPNOTSUPP;
+ break;
default: /* do not support other modes */
return -EOPNOTSUPP;
}
--
2.50.1