net: phy: Allow splitting MDIO bus/device support from PHYs

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Introduce a new configuration symbol: MDIO_DEVICE which allows building
the MDIO devices and bus code, without pulling in the entire Ethernet
PHY library and devices code.

PHYLIB nows select MDIO_DEVICE and the relevant Makefile files are
updated to reflect that.

When MDIO_DEVICE (MDIO bus/device only) is selected, but not PHYLIB, we
have mdio-bus.ko as a loadable module, and it does not have a
module_exit() function because the safety of removing a bus class is
unclear.

When both MDIO_DEVICE and PHYLIB are enabled, we need to assemble
everything into a common loadable module: libphy.ko because of nasty
circular dependencies between phy.c, phy_device.c and mdio_bus.c which
are really tough to untangle.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Florian Fainelli 2017-03-23 10:01:19 -07:00 • committed by David S. Miller

parent 17487eebaf

commit 90eff9096c

6 changed files with 76 additions and 30 deletions

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2

drivers/net/Makefile

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60

drivers/net/phy/Kconfig

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13

drivers/net/phy/Makefile

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1

drivers/net/phy/mdio-boardinfo.c

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9

drivers/net/phy/mdio_bus.c

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include/linux/phy.h

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