net: phy: micrel: Add ksz9131_resume()

[ Upstream commit f25a7eaa897f21396e99f90809af82ca553c9d14 ]

The Renesas RZ/G3E SMARC EVK uses KSZ9131RNXC phy. On deep power state,
PHY loses the power and on wakeup the rgmii delays are not reconfigured
causing it to fail.

Replace the callback kszphy_resume()->ksz9131_resume() for reconfiguring
the rgmii_delay when it exits from PM suspend state.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20250711054029.48536-1-biju.das.jz@bp.renesas.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index d4017c442201a018131187ccda7476819bd8d26f..6a114883ed8c5a71760648e61aa471dc1e9bba2c 100644 (file)
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -4722,6 +4722,14 @@ static int lan8841_suspend(struct phy_device *phydev)
        return genphy_suspend(phydev);
 }
 
+static int ksz9131_resume(struct phy_device *phydev)
+{
+       if (phydev->suspended && phy_interface_is_rgmii(phydev))
+               ksz9131_config_rgmii_delay(phydev);
+
+       return kszphy_resume(phydev);
+}
+
 static struct phy_driver ksphy_driver[] = {
 {
        .phy_id         = PHY_ID_KS8737,
@@ -4968,7 +4976,7 @@ static struct phy_driver ksphy_driver[] = {
        .get_strings    = kszphy_get_strings,
        .get_stats      = kszphy_get_stats,
        .suspend        = kszphy_suspend,
-       .resume         = kszphy_resume,
+       .resume         = ksz9131_resume,
        .cable_test_start       = ksz9x31_cable_test_start,
        .cable_test_get_status  = ksz9x31_cable_test_get_status,
        .get_features   = ksz9477_get_features,