ar71xx: add support for external mii_bus

[librecmc/librecmc.git] / target / linux / ar71xx / files / drivers / net / ag71xx / ag71xx_phy.c

diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c
index 176eddaaff754acb7400b66c384332b0302a7c45..0db0a4bf78506fc999e3c4d35ef103945938c9f3 100644 (file)
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c
@@ -262,10 +262,52 @@ static int ag71xx_phy_connect_multi(struct ag71xx *ag)
        return ret;
 }
 
+static int dev_is_class(struct device *dev, void *class)
+{
+       if (dev->class != NULL && !strcmp(dev->class->name, class))
+               return 1;
+
+       return 0;
+}
+
+static struct device *dev_find_class(struct device *parent, char *class)
+{
+       if (dev_is_class(parent, class)) {
+               get_device(parent);
+               return parent;
+       }
+
+       return device_find_child(parent, class, dev_is_class);
+}
+
+static struct mii_bus *dev_to_mii_bus(struct device *dev)
+{
+       struct device *d;
+
+       d = dev_find_class(dev, "mdio_bus");
+       if (d != NULL) {
+               struct mii_bus *bus;
+
+               bus = to_mii_bus(d);
+               put_device(d);
+
+               return bus;
+       }
+
+       return NULL;
+}
+
 int ag71xx_phy_connect(struct ag71xx *ag)
 {
        struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
 
+       ag->mii_bus = dev_to_mii_bus(pdata->mii_bus_dev);
+       if (ag->mii_bus == NULL) {
+               printk(KERN_ERR "%s: unable to find MII bus on device '%s'\n",
+                       ag->dev->name, dev_name(pdata->mii_bus_dev));
+               return -ENODEV;
+       }
+
        if (pdata->phy_mask)
                return ag71xx_phy_connect_multi(ag);