[net-next PATCH v3 5/5] net: mdiobus: Introduce fwnode_mdiobus_register_phy()

Calvin Johnson
2020-05-05T13:30:08Z

Introduce fwnode_mdiobus_register_phy() to register PHYs on the
mdiobus. From the compatible string, identify whether the PHY is
c45 and based on this create a PHY device instance which is
registered on the mdiobus.

Signed-off-by: Calvin Johnson <calvin.johnson@oss.nxp.com>
---

Changes in v3:
Introduce two functions to register phy to mdiobus using fwnode

Changes in v2: None

drivers/net/phy/mdio_bus.c | 41 ++++++++++++++++++++++++++++++++++++++
include/linux/mdio.h | 2 ++
2 files changed, 43 insertions(+)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 3e79b96fa344..b51e597c0479 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -106,6 +106,47 @@ int mdiobus_unregister_device(struct mdio_device *mdiodev)
}
EXPORT_SYMBOL(mdiobus_unregister_device);

+int fwnode_mdiobus_register_phy(struct mii_bus *bus,
+ struct fwnode_handle *child, u32 addr)
+{
+ struct phy_device *phy;
+ bool is_c45 = false;
+ const char *cp;
+ u32 phy_id;
+ int rc;
+
+ fwnode_property_read_string(child, "compatible", &cp);
+ if (!strcmp(cp, "ethernet-phy-ieee802.3-c45"))
+ is_c45 = true;
+
+ if (!is_c45 && !fwnode_get_phy_id(child, &phy_id))
+ phy = phy_device_create(bus, addr, phy_id, 0, NULL);
+ else
+ phy = get_phy_device(bus, addr, is_c45);
+ if (IS_ERR(phy))
+ return PTR_ERR(phy);
+
+ phy->irq = bus->irq[addr];
+
+ /* Associate the fwnode with the device structure so it
+ * can be looked up later.
+ */
+ phy->mdio.dev.fwnode = child;
+
+ /* All data is now stored in the phy struct, so register it */
+ rc = phy_device_register(phy);
+ if (rc) {
+ phy_device_free(phy);
+ fwnode_handle_put(child);
+ return rc;
+ }
+
+ dev_dbg(&bus->dev, "registered phy at address %i\n", addr);
+
+ return 0;
+}
+EXPORT_SYMBOL(fwnode_mdiobus_register_phy);
+
struct phy_device *mdiobus_get_phy(struct mii_bus *bus, int addr)
{
struct mdio_device *mdiodev = bus->mdio_map[addr];
diff --git a/include/linux/mdio.h b/include/linux/mdio.h
index 917e4bb2ed71..e55609697b42 100644
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h
@@ -330,6 +330,8 @@ int mdiobus_register_device(struct mdio_device *mdiodev);
int mdiobus_unregister_device(struct mdio_device *mdiodev);
bool mdiobus_is_registered_device(struct mii_bus *bus, int addr);
struct phy_device *mdiobus_get_phy(struct mii_bus *bus, int addr);
+int fwnode_mdiobus_register_phy(struct mii_bus *bus,
+ struct fwnode_handle *child, u32 addr);

/**
* mdio_module_driver() - Helper macro for registering mdio drivers
--
2.17.1