net: phy: ti: add PHY_RST_AFTER_CLK_EN flag

[ Upstream commit 256748d5480bb3c4b731236c6d6fc86a8e2815d8 ]

DP83848	datasheet (section 4.7.2) indicates that the reset pin should be
toggled after the clocks are running. Add the PHY_RST_AFTER_CLK_EN to
make sure that this indication is respected.

In my experience not having this flag enabled would lead to, on some
boots, the wrong MII mode being selected if the PHY was initialized on
the bootloader and was receiving data during Linux boot.

Signed-off-by: Diogo Silva <diogompaissilva@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Fixes: 34e45ad9378c ("net: phy: dp83848: Add TI DP83848 Ethernet PHY")
Link: https://patch.msgid.link/20241102151504.811306-1-paissilva@ld-100007.ds1.internal
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/phy/dp83848.c b/drivers/net/phy/dp83848.c
index b707a9b27847107d71da2f81cf6db0188212e0ac..406538ba50445d09cbe85990f0d83549b6762065 100644 (file)
--- a/drivers/net/phy/dp83848.c
+++ b/drivers/net/phy/dp83848.c
@@ -137,6 +137,8 @@ MODULE_DEVICE_TABLE(mdio, dp83848_tbl);
                .ack_interrupt  = dp83848_ack_interrupt,        \
                .config_intr    = dp83848_config_intr,          \
                .handle_interrupt = dp83848_handle_interrupt,   \
+                                                               \
+               .flags          = PHY_RST_AFTER_CLK_EN,         \
        }
 
 static struct phy_driver dp83848_driver[] = {