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add fixed_phy_update_state() - update state of fixed_phy

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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avoid running with outdated state, but of_phy_connect() returns the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>
This commit is contained in:
Stas Sergeev 2015-04-01 20:30:31 +03:00 committed by David S. Miller
parent bcad571824
commit a3bebdce41
2 changed files with 38 additions and 0 deletions
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29
drivers/net/phy/fixed_phy.c
View file

@ -183,6 +183,35 @@ int fixed_phy_set_link_update(struct phy_device *phydev,
}
EXPORT_SYMBOL_GPL(fixed_phy_set_link_update);
int fixed_phy_update_state(struct phy_device *phydev,
const struct fixed_phy_status *status,
const struct fixed_phy_status *changed)
{
struct fixed_mdio_bus *fmb = &platform_fmb;
struct fixed_phy *fp;
if (!phydev || !phydev->bus)
return -EINVAL;
list_for_each_entry(fp, &fmb->phys, node) {
if (fp->addr == phydev->addr) {
#define _UPD(x) if (changed->x) \
fp->status.x = status->x
_UPD(link);
_UPD(speed);
_UPD(duplex);
_UPD(pause);
_UPD(asym_pause);
#undef _UPD
fixed_phy_update_regs(fp);
return 0;
}
}
return -ENOENT;
}
EXPORT_SYMBOL(fixed_phy_update_state);
int fixed_phy_add(unsigned int irq, int phy_addr,
struct fixed_phy_status *status)
{

9
include/linux/phy_fixed.h
View file

@ -21,6 +21,9 @@ 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)
@ -43,6 +46,12 @@ static inline int fixed_phy_set_link_update(struct phy_device *phydev,
{
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 */