[PATCH 2/2] phy: bcm-ns-usb3: fix MDIO_BUS dependency

[Arnd Bergmann]

The driver attempts to 'select MDIO_DEVICE', but the code
is actually a loadable module when PHYLIB=m:

drivers/phy/broadcom/phy-bcm-ns-usb3.o: In function 
`bcm_ns_usb3_mdiodev_phy_write':
phy-bcm-ns-usb3.c:(.text.bcm_ns_usb3_mdiodev_phy_write+0x28): undefined 
reference to `mdiobus_write'
drivers/phy/broadcom/phy-bcm-ns-usb3.o: In function `bcm_ns_usb3_module_exit':
phy-bcm-ns-usb3.c:(.exit.text+0x18): undefined reference to 
`mdio_driver_unregister'
drivers/phy/broadcom/phy-bcm-ns-usb3.o: In function `bcm_ns_usb3_module_init':
phy-bcm-ns-usb3.c:(.init.text+0x18): undefined reference to 
`mdio_driver_register'
phy-bcm-ns-usb3.c:(.init.text+0x38): undefined reference to 
`mdio_driver_unregister'

Using 'depends on MDIO_BUS' instead will avoid the link error.

Fixes: af850e14a7ae ("phy: bcm-ns-usb3: add MDIO driver using proper bus layer")
Signed-off-by: Arnd Bergmann <a...@arndb.de>
Reviewed-by: Florian Fainelli <f.faine...@gmail.com>
---
 drivers/phy/broadcom/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/phy/broadcom/Kconfig b/drivers/phy/broadcom/Kconfig
index 37371b89b14f..64fc59c3ae6d 100644
--- a/drivers/phy/broadcom/Kconfig
+++ b/drivers/phy/broadcom/Kconfig
@@ -30,8 +30,8 @@ config PHY_BCM_NS_USB3
        tristate "Broadcom Northstar USB 3.0 PHY Driver"
        depends on ARCH_BCM_IPROC || COMPILE_TEST
        depends on HAS_IOMEM && OF
+       depends on MDIO_BUS
        select GENERIC_PHY
-       select MDIO_DEVICE
        help
          Enable this to support Broadcom USB 3.0 PHY connected to the USB
          controller on Northstar family.
-- 
2.9.0