-struct mii_bus *mdio_i2c_alloc(struct device *parent, struct i2c_adapter *i2c)
+/* RollBall SFPs do not access internal PHY via I2C address 0x56, but
+ * instead via address 0x51, when SFP page is set to 0x03 and password to
+ * 0xffffffff.
+ * Since current SFP code does not modify SFP_PAGE, we set it to 0x03 only at
+ * bus creation time, and expect it to remain set to 0x03 throughout the
+ * lifetime of the module plugged into the system. If the SFP code starts
+ * modifying SFP_PAGE in the future, this code will need to change.

Just an FYI: This is likely to change. NVIDIA are working on
generalizing the API ethtool -m uses. The new API should allow access
to pages and banks. I've already said i will implement the API in the
generic phylink SFP code. But no need to address this now.

	Andrew