+/**
+ * oa_tc6_read_register_mms - function for reading a MAC-PHY register in a
+ * memory map other than 0.

Is MMS 0 somehow special? Does it not work if passed to this function?

I'm not suggesting all the current calls are replaced with this, just
that the documentation might be inaccurate?

+ * @tc6: oa_tc6 struct.
+ * @mms: Memory map selector for the register.
+ * @address: register address of the MAC-PHY to be read.
+ * @value: value read from the @address register address of the MAC-PHY.
+ *
+ * Return: 0 on success otherwise failed.

Isn't the "otherwise" actually an error code?

	Andrew