[net-next PATCH v2 09/14] net: phy: Export some functions

Sean Anderson
2025-04-07T23:18:22Z

Export a few functions so they can be used outside the phy subsystem:

get_phy_c22_id is useful when probing MDIO devices which present a
phy-like interface despite not using the Linux ethernet phy subsystem.

mdio_device_bus_match is useful when creating MDIO devices manually
(e.g. on non-devicetree platforms).

At the moment the only (future) user of these functions selects PHYLIB,
so we do not need fallbacks for when CONFIG_PHYLIB=n.

Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
---

(no changes since v1)

drivers/net/phy/mdio_device.c | 1 +
drivers/net/phy/phy_device.c | 3 ++-
include/linux/phy.h | 1 +
3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/mdio_device.c b/drivers/net/phy/mdio_device.c
index e747ee63c665..cce3f405d1a4 100644
--- a/drivers/net/phy/mdio_device.c
+++ b/drivers/net/phy/mdio_device.c
@@ -45,6 +45,7 @@ int mdio_device_bus_match(struct device *dev, const struct device_driver *drv)

return strcmp(mdiodev->modalias, drv->name) == 0;
}
+EXPORT_SYMBOL_GPL(mdio_device_bus_match);

struct mdio_device *mdio_device_create(struct mii_bus *bus, int addr)
{
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 675fbd225378..45d8bc13eb64 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -859,7 +859,7 @@ static int get_phy_c45_ids(struct mii_bus *bus, int addr,
* valid, %-EIO on bus access error, or %-ENODEV if no device responds
* or invalid ID.
*/
-static int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id)
+int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id)
{
int phy_reg;

@@ -887,6 +887,7 @@ static int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id)

return 0;
}
+EXPORT_SYMBOL_GPL(get_phy_c22_id);

/* Extract the phy ID from the compatible string of the form
* ethernet-phy-idAAAA.BBBB.
diff --git a/include/linux/phy.h b/include/linux/phy.h
index a2bfae80c449..c648f1699c5c 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1754,6 +1754,7 @@ struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
bool is_c45,
struct phy_c45_device_ids *c45_ids);
#if IS_ENABLED(CONFIG_PHYLIB)
+int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id);
int fwnode_get_phy_id(struct fwnode_handle *fwnode, u32 *phy_id);
struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode);
struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode);
--
2.35.1.1320.gc452695387.dirty