[PATCH net-next v1 2/3] net: phy: dp83tg720: remove redundant 600ms post-reset delay

From: Oleksij Rempel
Date: Tue Jun 10 2025 - 04:30:30 EST


From: David Jander <david@xxxxxxxxxxx>

Now that dp83tg720_soft_reset() introduces role-specific delays to avoid
reset synchronization deadlocks, the fixed 600ms post-reset delay in
dp83tg720_read_status() is no longer needed.

The new logic provides both the required MDC timing and link stabilization,
making the old empirical delay redundant and unnecessarily long.

Co-developed-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
Signed-off-by: David Jander <david@xxxxxxxxxxx>
---
drivers/net/phy/dp83tg720.c | 10 ----------
1 file changed, 10 deletions(-)

diff --git a/drivers/net/phy/dp83tg720.c b/drivers/net/phy/dp83tg720.c
index 2c86d05bf857..00963ce0eb10 100644
--- a/drivers/net/phy/dp83tg720.c
+++ b/drivers/net/phy/dp83tg720.c
@@ -444,21 +444,11 @@ static int dp83tg720_read_status(struct phy_device *phydev)
/* According to the "DP83TC81x, DP83TG72x Software
* Implementation Guide", the PHY needs to be reset after a
* link loss or if no link is created after at least 100ms.
- *
- * Currently we are polling with the PHY_STATE_TIME (1000ms)
- * interval, which is still enough for not automotive use cases.
*/
ret = phy_init_hw(phydev);
if (ret)
return ret;

- /* Sleep 600ms for PHY stabilization post-reset.
- * Empirically chosen value (not documented).
- * Helps reduce reset bounces with link partners having similar
- * issues.
- */
- msleep(600);
-
/* After HW reset we need to restore master/slave configuration.
* genphy_c45_pma_baset1_read_master_slave() call will be done
* by the dp83tg720_config_aneg() function.
--
2.39.5