netdev - [PATCH v2 net] net: phy: micrel: set soft_reset callback to genphy_soft

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Message-ID: <c1adb83f-57dc-9a97-f10a-c0853cdd8f09@t2data.com>
Date:   Tue, 23 Feb 2021 09:30:30 +0100
From:   Christian Melki <christian.melki@...ata.com>
To:     netdev@...r.kernel.org
Cc:     andrew@...n.ch, hkallweit1@...il.com, f.fainelli@...il.com,
        kuba@...nel.org
Subject: [PATCH v2 net] net: phy: micrel: set soft_reset callback to
 genphy_soft_reset for KSZ8081

Following a similar reinstate for the KSZ9031.

Older kernels would use the genphy_soft_reset if the PHY did not 
implement a .soft_reset.

Bluntly removing that default may expose a lot of situations where 
various PHYs/board implementations won't recover on various changes.
Like with tgus implementation during a 4.9.x to 5.4.x LTS transition.
I think it's a good thing to remove unwanted soft resets but wonder if 
it did open a can of worms?

Atleast this fixes one iMX6 FEC/RMII/8081 combo.

Fixes: 6e2d85ec0559 ("net: phy: Stop with excessive soft reset")
Signed-off-by: Christian Melki <christian.melki@...ata.com>
---
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 7ec6f70d6a82..a14a00328fa3 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -1303,6 +1303,7 @@ static struct phy_driver ksphy_driver[] = {
  	.driver_data	= &ksz8081_type,
  	.probe		= kszphy_probe,
  	.config_init	= ksz8081_config_init,
+	.soft_reset	= genphy_soft_reset,
  	.config_intr	= kszphy_config_intr,
  	.handle_interrupt = kszphy_handle_interrupt,
  	.get_sset_count = kszphy_get_sset_count,
--