net: phy: Allow building mdio-boardinfo into the kernel

mdio-boardinfo contains code that is helpful for platforms to register
specific MDIO bus devices independent of how CONFIG_MDIO_DEVICE or
CONFIG_PHYLIB will be selected (modular or built-in). In order to make
that possible, let's do the following:

- descend into drivers/net/phy/ unconditionally

- make mdiobus_setup_mdiodev_from_board_info() take a callback argument
  which allows us not to expose the internal MDIO board info list and
  mutex, yet maintain the logic within the same file

- relocate the code that creates a MDIO device into
  drivers/net/phy/mdio_bus.c

- build mdio-boardinfo.o into the kernel as soon as MDIO_DEVICE is
  defined (y or m)

Fixes: 90eff9096c01 ("net: phy: Allow splitting MDIO bus/device support from PHYs")
Fixes: 648ea0134069 ("net: phy: Allow pre-declaration of MDIO devices")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 14 deletions

diff --git a/drivers/net/phy/mdio-boardinfo.c b/drivers/net/phy/mdio-boardinfo.c
index 61941e29daae..1861f387820d 100644
--- a/drivers/net/phy/mdio-boardinfo.c
+++ b/drivers/net/phy/mdio-boardinfo.c
@@ -24,10 +24,12 @@ static DEFINE_MUTEX(mdio_board_lock);
  * @mdiodev: MDIO device pointer
  * Context: can sleep
  */
-void mdiobus_setup_mdiodev_from_board_info(struct mii_bus *bus)
+void mdiobus_setup_mdiodev_from_board_info(struct mii_bus *bus,
+					   int (*cb)
+					   (struct mii_bus *bus,
+					    struct mdio_board_info *bi))
 {
 	struct mdio_board_entry *be;
-	struct mdio_device *mdiodev;
 	struct mdio_board_info *bi;
 	int ret;
 
@@ -38,23 +40,14 @@ void mdiobus_setup_mdiodev_from_board_info(struct mii_bus *bus)
 		if (strcmp(bus->id, bi->bus_id))
 			continue;
 
-		mdiodev = mdio_device_create(bus, bi->mdio_addr);
-		if (IS_ERR(mdiodev))
+		ret = cb(bus, bi);
+		if (ret)
 			continue;
 
-		strncpy(mdiodev->modalias, bi->modalias,
-			sizeof(mdiodev->modalias));
-		mdiodev->bus_match = mdio_device_bus_match;
-		mdiodev->dev.platform_data = (void *)bi->platform_data;
-
-		ret = mdio_device_register(mdiodev);
-		if (ret) {
-			mdio_device_free(mdiodev);
-			continue;
-		}
 	}
 	mutex_unlock(&mdio_board_lock);
 }
+EXPORT_SYMBOL(mdiobus_setup_mdiodev_from_board_info);
 
 /**
  * mdio_register_board_info - register MDIO devices for a given board