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net: phy: rework Kconfig settings for MDIO_BUS

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I still see build errors in randconfig builds and have had this
patch for a while to locally work around it:

drivers/built-in.o: In function `xgene_mdio_probe':
mux-core.c:(.text+0x352154): undefined reference to `of_mdiobus_register'
mux-core.c:(.text+0x352168): undefined reference to `mdiobus_free'
mux-core.c:(.text+0x3521c0): undefined reference to `mdiobus_alloc_size'

The idea is that CONFIG_MDIO_BUS now reflects whether the mdio_bus
code is built-in or a module, and other drivers that use the core
code can simply depend on that, instead of having a complex
dependency line.

Fixes: 90eff9096c ("net: phy: Allow splitting MDIO bus/device support from PHYs")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2017-07-26 17:13:59 +02:00 committed by David S. Miller
parent 6b84202c94
commit 4c3464a8c3
1 changed files with 10 additions and 3 deletions
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13
drivers/net/phy/Kconfig
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@ -7,7 +7,16 @@ menuconfig MDIO_DEVICE
help
MDIO devices and driver infrastructure code.
if MDIO_DEVICE
config MDIO_BUS
tristate
default m if PHYLIB=m
default MDIO_DEVICE
help
This internal symbol is used for link time dependencies and it
reflects whether the mdio_bus/mdio_device code is built as a
loadable module or built-in.
if MDIO_BUS
config MDIO_BCM_IPROC
tristate "Broadcom iProc MDIO bus controller"
@ -28,7 +37,6 @@ config MDIO_BCM_UNIMAC
config MDIO_BITBANG
tristate "Bitbanged MDIO buses"
depends on !(MDIO_DEVICE=y && PHYLIB=m)
help
This module implements the MDIO bus protocol in software,
for use by low level drivers that export the ability to
@ -127,7 +135,6 @@ config MDIO_THUNDER
tristate "ThunderX SOCs MDIO buses"
depends on 64BIT
depends on PCI
depends on !(MDIO_DEVICE=y && PHYLIB=m)
select MDIO_CAVIUM
help
This driver supports the MDIO interfaces found on Cavium