net: dsa: allow enabling and disable switch ports

Whenever a per-port network device is used/unused, invoke the switch
driver port_enable/port_disable callbacks to allow saving as much power
as possible by disabling unused parts of the switch (RX/TX logic, memory
arrays, PHYs...). We supply a PHY device argument to make sure the
switch driver can act on the PHY device if needed (like putting/taking
the PHY out of deep low power mode).

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/net/dsa.h b/include/net/dsa.h
index d8054fb4a4df..4f664fe0e42c 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -224,6 +224,14 @@ struct dsa_switch_driver {
          */
         int     (*suspend)(struct dsa_switch *ds);
         int     (*resume)(struct dsa_switch *ds);
+
+        /*
+         * Port enable/disable
+         */
+        int     (*port_enable)(struct dsa_switch *ds, int port,
+                               struct phy_device *phy);
+        void    (*port_disable)(struct dsa_switch *ds, int port,
+                                struct phy_device *phy);
 };
 
 void register_switch_driver(struct dsa_switch_driver *type);