[PATCH net-next v6 2/6] net: dsa: motorcomm: use max_ports in series for port bounds checking

[Kyle Switch <kyle.switch@motor-comm.com>]

Replace the hardcoded YT921X_PORT_NUM macro with the per-series
max_ports field in port validation. This removes family-specific
constants from the common code path and simplifies adding new
switch families with different port counts.

No functional change for existing YT921X devices.

Signed-off-by: Kyle Switch <kyle.switch@motor-comm.com>
---
 drivers/net/dsa/motorcomm/chip.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/dsa/motorcomm/chip.c b/drivers/net/dsa/motorcomm/chip.c
index ffed823f26a8..191a7aa3733e 100644
--- a/drivers/net/dsa/motorcomm/chip.c
+++ b/drivers/net/dsa/motorcomm/chip.c
@@ -357,7 +357,7 @@ static int yt921x_mbus_int_read(struct mii_bus *mbus, int port, int reg)
 	u16 val;
 	int res;
 
-	if (port >= YT921X_PORT_NUM)
+	if (port >= priv->series->max_ports)
 		return U16_MAX;
 
 	mutex_lock(&priv->reg_lock);
@@ -375,7 +375,7 @@ yt921x_mbus_int_write(struct mii_bus *mbus, int port, int reg, u16 data)
 	struct yt921x_priv *priv = mbus->priv;
 	int res;
 
-	if (port >= YT921X_PORT_NUM)
+	if (port >= priv->series->max_ports)
 		return -ENODEV;
 
 	mutex_lock(&priv->reg_lock);
@@ -390,6 +390,7 @@ yt921x_mbus_int_init(struct yt921x_priv *priv, struct device_node *mnp)
 {
 	struct device *dev = to_device(priv);
 	struct mii_bus *mbus;
+	u32 max_ports;
 	int res;
 
 	mbus = devm_mdiobus_alloc(dev);
@@ -402,7 +403,8 @@ yt921x_mbus_int_init(struct yt921x_priv *priv, struct device_node *mnp)
 	mbus->read = yt921x_mbus_int_read;
 	mbus->write = yt921x_mbus_int_write;
 	mbus->parent = dev;
-	mbus->phy_mask = (u32)~GENMASK(YT921X_PORT_NUM - 1, 0);
+	max_ports = priv->series->max_ports;
+	mbus->phy_mask = (u32)~GENMASK(max_ports - 1, 0);
 
 	res = devm_of_mdiobus_register(dev, mbus, mnp);
 	if (res)
-- 
2.25.1