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authorStas Sergeev <stsp@list.ru>2015-04-01 20:30:31 +0300
committerDavid S. Miller <davem@davemloft.net>2015-04-03 22:08:20 +0300
commita3bebdce4135a44d09e96ba66c40797c8f9fa902 (patch)
tree8627743774e7dbf217f0d46c770a7baa6002b067 /drivers/net/phy/fixed_phy.c
parentbcad57182425426dd4aa14deb27f97acb329f3cd (diff)
downloadlinux-a3bebdce4135a44d09e96ba66c40797c8f9fa902.tar.xz
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 - The callback needs to be registered before of_phy_connect() to avoid running with outdated state, but of_phy_connect() returns the phy_device pointer, which is needed to register the callback.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>
Diffstat (limited to 'drivers/net/phy/fixed_phy.c')
-rw-r--r--drivers/net/phy/fixed_phy.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c
index a08a3c78ba97..1960b46add65 100644
--- a/drivers/net/phy/fixed_phy.c
+++ b/drivers/net/phy/fixed_phy.c
@@ -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)
{