From: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
[ Upstream commit e3fb8e8ba72b053d05ca2602acdd6b869f9f296f ]
This driver has two separate reset sequence in different places:
- gpio/HW reset on start of ksz_switch_register()
- SW reset on start of ksz_setup()
The second one will overwrite drive strength configuration made in the
ksz_switch_register().
To fix it, move ksz_parse_drive_strength() from ksz_switch_register() to
ksz_setup().
Fixes: d67d7247f641 ("net: dsa: microchip: Add drive strength configuration")
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240304135612.814404-1-o.rempel@xxxxxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/dsa/microchip/ksz_common.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index ff4b39601c937..d5d7e48b7b928 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -2176,6 +2176,8 @@ static int ksz_pirq_setup(struct ksz_device *dev, u8 p)
return ksz_irq_common_setup(dev, pirq);
}
+static int ksz_parse_drive_strength(struct ksz_device *dev);
+
static int ksz_setup(struct dsa_switch *ds)
{
struct ksz_device *dev = ds->priv;
@@ -2197,6 +2199,10 @@ static int ksz_setup(struct dsa_switch *ds)
return ret;
}
+ ret = ksz_parse_drive_strength(dev);
+ if (ret)
+ return ret;
+
/* set broadcast storm protection 10% rate */
regmap_update_bits(ksz_regmap_16(dev), regs[S_BROADCAST_CTRL],
BROADCAST_STORM_RATE,
@@ -4236,10 +4242,6 @@ int ksz_switch_register(struct ksz_device *dev)
for (port_num = 0; port_num < dev->info->port_cnt; ++port_num)
dev->ports[port_num].interface = PHY_INTERFACE_MODE_NA;
if (dev->dev->of_node) {
- ret = ksz_parse_drive_strength(dev);
- if (ret)
- return ret;
-
ret = of_get_phy_mode(dev->dev->of_node, &interface);
if (ret == 0)
dev->compat_interface = interface;
--
2.43.0
