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net: dsa: OF-ware slave_mii_bus 

If found, register the DSA internally allocated slave_mii_bus with an OF
"mdio" child object. It can save some drivers from creating their
custom internal MDIO bus.

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Luiz Angelo Daros de Luca 2022-05-22 22:32:34 -03:00 committed by David S. Miller
parent 32c53420d2
commit fe7324b932
1 changed files with 6 additions and 1 deletions
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7
net/dsa/dsa2.c
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@ -13,6 +13,7 @@
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/rtnetlink.h> #include <linux/rtnetlink.h>
#include <linux/of.h> #include <linux/of.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h> #include <linux/of_net.h>
#include <net/devlink.h> #include <net/devlink.h>
#include <net/sch_generic.h> #include <net/sch_generic.h>
@ -852,6 +853,7 @@ static int dsa_switch_setup_tag_protocol(struct dsa_switch *ds)
static int dsa_switch_setup(struct dsa_switch *ds) static int dsa_switch_setup(struct dsa_switch *ds)
{ {
struct dsa_devlink_priv *dl_priv; struct dsa_devlink_priv *dl_priv;
struct device_node *dn;
struct dsa_port *dp; struct dsa_port *dp;
int err; int err;
@ -907,7 +909,10 @@ static int dsa_switch_setup(struct dsa_switch *ds)
dsa_slave_mii_bus_init(ds); dsa_slave_mii_bus_init(ds);
err = mdiobus_register(ds->slave_mii_bus); dn = of_get_child_by_name(ds->dev->of_node, "mdio");
err = of_mdiobus_register(ds->slave_mii_bus, dn);
of_node_put(dn);
if (err < 0) if (err < 0)
goto free_slave_mii_bus; goto free_slave_mii_bus;
} }