Commit 90eff909 authored by Florian Fainelli's avatar Florian Fainelli Committed by David S. Miller
Browse files

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



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: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 17487eeb
......@@ -18,7 +18,7 @@ obj-$(CONFIG_MII) += mii.o
obj-$(CONFIG_MDIO) += mdio.o
obj-$(CONFIG_NET) += Space.o loopback.o
obj-$(CONFIG_NETCONSOLE) += netconsole.o
obj-$(CONFIG_PHYLIB) += phy/
obj-$(CONFIG_MDIO_DEVICE) += phy/
obj-$(CONFIG_RIONET) += rionet.o
obj-$(CONFIG_NET_TEAM) += team/
obj-$(CONFIG_TUN) += tun.o
......
......@@ -2,33 +2,12 @@
# PHY Layer Configuration
#
menuconfig PHYLIB
tristate "PHY Device support and infrastructure"
depends on NETDEVICES
menuconfig MDIO_DEVICE
tristate "MDIO bus device drivers"
help
Ethernet controllers are usually attached to PHY
devices. This option provides infrastructure for
managing PHY devices.
if PHYLIB
config SWPHY
bool
config LED_TRIGGER_PHY
bool "Support LED triggers for tracking link state"
depends on LEDS_TRIGGERS
---help---
Adds support for a set of LED trigger events per-PHY. Link
state change will trigger the events, for consumption by an
LED class driver. There are triggers for each link speed currently
supported by the phy, and are of the form:
<mii bus id>:<phy>:<speed>
Where speed is in the form:
<Speed in megabits>Mbps or <Speed in gigabits>Gbps
MDIO devices and driver infrastructure code.
comment "MDIO bus device drivers"
if MDIO_DEVICE
config MDIO_BCM_IPROC
tristate "Broadcom iProc MDIO bus controller"
......@@ -49,6 +28,7 @@ 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
......@@ -160,6 +140,36 @@ config MDIO_XGENE
This module provides a driver for the MDIO busses found in the
APM X-Gene SoC's.
endif
menuconfig PHYLIB
tristate "PHY Device support and infrastructure"
depends on NETDEVICES
select MDIO_DEVICE
help
Ethernet controllers are usually attached to PHY
devices. This option provides infrastructure for
managing PHY devices.
if PHYLIB
config SWPHY
bool
config LED_TRIGGER_PHY
bool "Support LED triggers for tracking link state"
depends on LEDS_TRIGGERS
---help---
Adds support for a set of LED trigger events per-PHY. Link
state change will trigger the events, for consumption by an
LED class driver. There are triggers for each link speed currently
supported by the phy, and are of the form:
<mii bus id>:<phy>:<speed>
Where speed is in the form:
<Speed in megabits>Mbps or <Speed in gigabits>Gbps
comment "MII PHY device drivers"
config AMD_PHY
......
# Makefile for Linux PHY drivers and MDIO bus drivers
libphy-y := phy.o phy_device.o mdio_bus.o mdio_device.o \
mdio-boardinfo.o phy-core.o
libphy-y := phy.o phy-core.o phy_device.o
mdio-bus-y += mdio_bus.o mdio_device.o mdio-boardinfo.o
# PHYLIB implies MDIO_DEVICE, in that case, we have a bunch of circular
# dependencies that does not make it possible to split mdio-bus objects into a
# dedicated loadable module, so we bundle them all together into libphy.ko
ifdef CONFIG_PHYLIB
libphy-y += $(mdio-bus-y)
else
obj-$(CONFIG_MDIO_DEVICE) += mdio-bus.o
endif
libphy-$(CONFIG_SWPHY) += swphy.o
libphy-$(CONFIG_LED_TRIGGER_PHY) += phy_led_triggers.o
......
......@@ -84,3 +84,4 @@ int mdiobus_register_board_info(const struct mdio_board_info *info,
return 0;
}
EXPORT_SYMBOL(mdiobus_register_board_info);
......@@ -648,9 +648,18 @@ int __init mdio_bus_init(void)
return ret;
}
EXPORT_SYMBOL_GPL(mdio_bus_init);
#if IS_ENABLED(CONFIG_PHYLIB)
void mdio_bus_exit(void)
{
class_unregister(&mdio_bus_class);
bus_unregister(&mdio_bus_type);
}
EXPORT_SYMBOL_GPL(mdio_bus_exit);
#else
module_init(mdio_bus_init);
/* no module_exit, intentional */
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("MDIO bus/device layer");
#endif
......@@ -745,8 +745,24 @@ int phy_write_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val);
struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
bool is_c45,
struct phy_c45_device_ids *c45_ids);
#if IS_ENABLED(CONFIG_PHYLIB)
struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45);
int phy_device_register(struct phy_device *phy);
void phy_device_free(struct phy_device *phydev);
#else
static inline
struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
{
return NULL;
}
static inline int phy_device_register(struct phy_device *phy)
{
return 0;
}
static inline void phy_device_free(struct phy_device *phydev) { }
#endif /* CONFIG_PHYLIB */
void phy_device_remove(struct phy_device *phydev);
int phy_init_hw(struct phy_device *phydev);
int phy_suspend(struct phy_device *phydev);
......@@ -827,7 +843,6 @@ int phy_ethtool_ksettings_set(struct phy_device *phydev,
int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd);
int phy_start_interrupts(struct phy_device *phydev);
void phy_print_status(struct phy_device *phydev);
void phy_device_free(struct phy_device *phydev);
int phy_set_max_speed(struct phy_device *phydev, u32 max_speed);
int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
......@@ -854,8 +869,10 @@ int phy_ethtool_set_link_ksettings(struct net_device *ndev,
const struct ethtool_link_ksettings *cmd);
int phy_ethtool_nway_reset(struct net_device *ndev);
#if IS_ENABLED(CONFIG_PHYLIB)
int __init mdio_bus_init(void);
void mdio_bus_exit(void);
#endif
extern struct bus_type mdio_bus_type;
......@@ -866,7 +883,7 @@ struct mdio_board_info {
const void *platform_data;
};
#if IS_ENABLED(CONFIG_PHYLIB)
#if IS_ENABLED(CONFIG_MDIO_DEVICE)
int mdiobus_register_board_info(const struct mdio_board_info *info,
unsigned int n);
#else
......
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