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 50c6a4e8cfa16eaf24d6ced801c93b94b63c20cf..52c6778116160ddfa001bcbe119e6b4adc2cc12d 100644 (file)
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -5405,6 +5405,14 @@ static int lan8841_suspend(struct phy_device *phydev)
        return kszphy_generic_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,
@@ -5651,7 +5659,7 @@ 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,