[PATCH v2] net: mv88e6xxx: fix missing SMI address initialization

Marek Mojík
2023-12-06T14:36:05Z

The mv88e6xxx driver does not currently initialize the smi_addr field, but
instead keeps the default zero value. This leads to driver being unusable
on devices where the switch is not on address zero of the mdio bus. Fix
this problem by reading the SMI address from device tree.

Signed-off-by: Marek Mojík <marek.mojik@nic.cz>
---
drivers/net/mv88e6xxx.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/drivers/net/mv88e6xxx.c b/drivers/net/mv88e6xxx.c
index c073f81e72..8fbbc1cacc 100644
--- a/drivers/net/mv88e6xxx.c
+++ b/drivers/net/mv88e6xxx.c
@@ -745,6 +745,7 @@ static int mv88e6xxx_probe(struct udevice *dev)
{
struct dsa_pdata *dsa_pdata = dev_get_uclass_plat(dev);
struct mv88e6xxx_priv *priv = dev_get_priv(dev);
+ fdt_addr_t smi_addr;
int val, ret;

if (ofnode_valid(dev_ofnode(dev)) &&
@@ -753,6 +754,13 @@ static int mv88e6xxx_probe(struct udevice *dev)
return -ENODEV;
}

+ smi_addr = dev_read_addr(dev);
+ if (smi_addr == FDT_ADDR_T_NONE) {
+ dev_err(dev, "Missing SMI address\n");
+ return -EINVAL;
+ }
+ priv->smi_addr = smi_addr;
+
/* probe internal mdio bus */
ret = mv88e6xxx_probe_mdio(dev);
if (ret)
--
2.42.1