Port of_mdio_find_bus() from Linux kernel. This function is used in
MDIO multiplexor infrastructure added in following commit.
Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
---
drivers/net/phy/mdio_bus.c | 27 +++++++++++++++++++++++++++
include/linux/phy.h | 2 ++
2 files changed, 29 insertions(+)
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 012b90e83..6ae85692d 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -206,6 +206,33 @@ struct mii_bus *mdiobus_get_bus(int busnum)
return NULL;
}
+/**
+ * of_mdio_find_bus - Given an mii_bus node, find the mii_bus.
+ * @mdio_bus_np: Pointer to the mii_bus.
+ *
+ * Returns a reference to the mii_bus, or NULL if none found.
+ *
+ * Because the association of a device_node and mii_bus is made via
+ * mdiobus_register(), the mii_bus cannot be found before it is
+ * registered with mdiobus_register().
+ *
+ */
+struct mii_bus *of_mdio_find_bus(struct device_node *mdio_bus_np)
+{
+ struct mii_bus *mii;
+
+ if (!mdio_bus_np)
+ return NULL;
+
+ for_each_mii_bus(mii)
+ if (mii->dev.device_node == mdio_bus_np)
+ return mii;
+
+ return NULL;
+}
+EXPORT_SYMBOL(of_mdio_find_bus);
+
+
/**
* mdio_bus_match - determine if given PHY driver supports the given PHY device
* @dev: target PHY device
diff --git a/include/linux/phy.h b/include/linux/phy.h
index d7b10afbc..809f06fb1 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -116,6 +116,8 @@ int mdiobus_detect(struct device_d *dev);
struct mii_bus *mdiobus_get_bus(int busnum);
+struct mii_bus *of_mdio_find_bus(struct device_node *mdio_bus_np);
+
/**
* mdiobus_read - Convenience function for reading a given MII mgmt register
* @bus: the mii_bus struct
--
2.14.3
_______________________________________________
barebox mailing list
barebox@xxxxxxxxxxxxxxxxxxx
http://lists.infradead.org/mailman/listinfo/barebox
