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net: dsa: add port parse functions 

Add symmetrical DSA port parsing functions for pdata and device tree,
used to parse and validate a given port node or platform data.

They don't do much for the moment but will be extended later on to
assign a port type and get device references.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot 2017-10-27 15:55:14 -04:00 committed by David S. Miller
parent 5b32fe070c
commit fd223e2e66
1 changed files with 34 additions and 3 deletions
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37
net/dsa/dsa2.c
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@ -590,9 +590,17 @@ static int dsa_dst_parse(struct dsa_switch_tree *dst)
return 0;
}
static int dsa_port_parse_of(struct dsa_port *dp, struct device_node *dn)
{
dp->dn = dn;
return 0;
}
static int dsa_parse_ports_of(struct device_node *dn, struct dsa_switch *ds)
{
struct device_node *ports, *port;
struct dsa_port *dp;
u32 reg;
int err;
@ -610,22 +618,45 @@ static int dsa_parse_ports_of(struct device_node *dn, struct dsa_switch *ds)
if (reg >= ds->num_ports)
return -EINVAL;
ds->ports[reg].dn = port;
dp = &ds->ports[reg];
err = dsa_port_parse_of(dp, port);
if (err)
return err;
}
return 0;
}
static int dsa_port_parse(struct dsa_port *dp, const char *name,
struct device *dev)
{
dp->name = name;
return 0;
}
static int dsa_parse_ports(struct dsa_chip_data *cd, struct dsa_switch *ds)
{
bool valid_name_found = false;
struct dsa_port *dp;
struct device *dev;
const char *name;
unsigned int i;
int err;
for (i = 0; i < DSA_MAX_PORTS; i++) {
if (!cd->port_names[i])
name = cd->port_names[i];
dev = cd->netdev[i];
dp = &ds->ports[i];
if (!name)
continue;
ds->ports[i].name = cd->port_names[i];
err = dsa_port_parse(dp, name, dev);
if (err)
return err;
valid_name_found = true;
}