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Subject[PATCH v2 3/5] net: phy: provide phy_resume/phy_suspend helpers
Date
This adds helper functions to resume and suspend a given phy_device
by calling the corresponding driver callbacks if available.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
---
Cc: David Miller <davem@davemloft.net>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Mugunthan V N <mugunthanvnm@ti.com>
Cc: netdev@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
drivers/net/phy/phy_device.c | 24 ++++++++++++++++++++++++
include/linux/phy.h | 2 ++
2 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index d6447b3..6f0e9e4 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -625,6 +625,30 @@ void phy_detach(struct phy_device *phydev)
}
EXPORT_SYMBOL(phy_detach);

+int phy_suspend(struct phy_device *phydev)
+{
+ struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver);
+ struct ethtool_wolinfo wol;
+
+ /* If the device has WOL enabled, we cannot suspend the PHY */
+ wol.cmd = ETHTOOL_GWOL;
+ phy_ethtool_get_wol(phydev, &wol);
+ if (wol.wolopts)
+ return -EBUSY;
+
+ if (phydrv->suspend)
+ return phydrv->suspend(phydev);
+ return 0;
+}
+
+int phy_resume(struct phy_device *phydev)
+{
+ struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver);
+
+ if (phydrv->resume)
+ return phydrv->resume(phydev);
+ return 0;
+}

/* Generic PHY support and helper functions */

diff --git a/include/linux/phy.h b/include/linux/phy.h
index 48a4dc3..1070ee3 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -538,6 +538,8 @@ struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45);
int phy_device_register(struct phy_device *phy);
int phy_init_hw(struct phy_device *phydev);
+int phy_suspend(struct phy_device *phydev);
+int phy_resume(struct phy_device *phydev);
struct phy_device * phy_attach(struct net_device *dev,
const char *bus_id, phy_interface_t interface);
struct phy_device *phy_find_first(struct mii_bus *bus);
--
1.7.2.5


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