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linux-next/include/linux/phy_fixed.h
Stas Sergeev a3bebdce41 add fixed_phy_update_state() - update state of fixed_phy
Currently fixed_phy uses a callback to periodically poll the link state.
This patch adds the fixed_phy_update_state() API.
It solves the following problems:
- On link state interrupt, MAC driver can't update status.
Instead it needs to provide the callback to periodically query
the HW about the link state. It is more efficient to update status
after interrupt.
- The callback needs to be unregistered before phy_disconnect(),
or otherwise it will be called with net_dev==NULL. phy_disconnect()
does not have enough info to unregister the callback automatically.
- The callback needs to be registered before of_phy_connect() to
avoid running with outdated state, but of_phy_connect() returns the
phy_device pointer, which is needed to register the callback. Registering
it before of_phy_connect() will therefore require a hack to get the
pointer earlier.

Overall, this addition makes the subsequent patch that implements
SGMII link status for mvneta, much cleaner.

CC: Florian Fainelli <f.fainelli@gmail.com>
CC: netdev@vger.kernel.org
CC: linux-kernel@vger.kernel.org

Signed-off-by: Stas Sergeev <stsp@users.sourceforge.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-04-03 15:08:20 -04:00

58 lines
1.5 KiB
C

#ifndef __PHY_FIXED_H
#define __PHY_FIXED_H
struct fixed_phy_status {
int link;
int speed;
int duplex;
int pause;
int asym_pause;
};
struct device_node;
#if IS_ENABLED(CONFIG_FIXED_PHY)
extern int fixed_phy_add(unsigned int irq, int phy_id,
struct fixed_phy_status *status);
extern struct phy_device *fixed_phy_register(unsigned int irq,
struct fixed_phy_status *status,
struct device_node *np);
extern void fixed_phy_del(int phy_addr);
extern int fixed_phy_set_link_update(struct phy_device *phydev,
int (*link_update)(struct net_device *,
struct fixed_phy_status *));
extern int fixed_phy_update_state(struct phy_device *phydev,
const struct fixed_phy_status *status,
const struct fixed_phy_status *changed);
#else
static inline int fixed_phy_add(unsigned int irq, int phy_id,
struct fixed_phy_status *status)
{
return -ENODEV;
}
static inline struct phy_device *fixed_phy_register(unsigned int irq,
struct fixed_phy_status *status,
struct device_node *np)
{
return ERR_PTR(-ENODEV);
}
static inline int fixed_phy_del(int phy_addr)
{
return -ENODEV;
}
static inline int fixed_phy_set_link_update(struct phy_device *phydev,
int (*link_update)(struct net_device *,
struct fixed_phy_status *))
{
return -ENODEV;
}
static inline int fixed_phy_update_state(struct phy_device *phydev,
const struct fixed_phy_status *status,
const struct fixed_phy_status *changed)
{
return -ENODEV;
}
#endif /* CONFIG_FIXED_PHY */
#endif /* __PHY_FIXED_H */