net: dsa: Allow compiling out legacy support

Introduce a configuration option: CONFIG_NET_DSA_LEGACY allowing to compile out
support for the old platform device and Device Tree binding registration.
Support for these configurations is scheduled to be removed in 4.17.

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

1 files changed, 11 insertions, 0 deletions

diff --git a/include/net/dsa.h b/include/net/dsa.h
index d29feccaefab..6cb602dd970c 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -321,12 +321,14 @@ static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
                               bool is_static, void *data);
 struct dsa_switch_ops {
+#if IS_ENABLED(CONFIG_NET_DSA_LEGACY)
         /*
          * Legacy probing.
          */
         const char      *(*probe)(struct device *dsa_dev,
                                   struct device *host_dev, int sw_addr,
                                   void **priv);
+#endif
 
         enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
                                                   int port);
@@ -474,11 +476,20 @@ struct dsa_switch_driver {
         const struct dsa_switch_ops *ops;
 };
 
+#if IS_ENABLED(CONFIG_NET_DSA_LEGACY)
 /* Legacy driver registration */
 void register_switch_driver(struct dsa_switch_driver *type);
 void unregister_switch_driver(struct dsa_switch_driver *type);
 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev);
 
+#else
+static inline void register_switch_driver(struct dsa_switch_driver *type) { }
+static inline void unregister_switch_driver(struct dsa_switch_driver *type) { }
+static inline struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev)
+{
+        return NULL;
+}
+#endif
 struct net_device *dsa_dev_to_net_device(struct device *dev);
 
 /* Keep inline for faster access in hot path */