[POWERPC] Document phy-connection-type property

Since ucc_geth is being migrated to use the phylib, the existing
(undocumented) 'interface' property is being deprecated in favour
of 'phy-connection-type'.

phy-connection-type is now maintained one-to-one with definitions
in include/linux/phy.h, albeit in the form of a string.
If not specified, "mii" is assumed.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/Documentation/powerpc/booting-without-of.txt b/Documentation/powerpc/booting-without-of.txt
index 033a3f3b3ab77b65d146ec38ec63acba35982c88..d4bfae75c9465edf74328d2348ffa34773955b39 100644 (file)
--- a/Documentation/powerpc/booting-without-of.txt
+++ b/Documentation/powerpc/booting-without-of.txt
@@ -1560,6 +1560,9 @@ platforms are moved over to use the flattened-device-tree model.
      network device.  This is used by the bootwrapper to interpret
      MAC addresses passed by the firmware when no information other
      than indices is available to associate an address with a device.
+   - phy-connection-type : a string naming the controller/PHY interface type,
+     i.e., "mii" (default), "rmii", "gmii", "rgmii", "rgmii-id", "tbi",
+     or "rtbi".
 
    Example:
        ucc@2000 {
@@ -1574,6 +1577,7 @@ platforms are moved over to use the flattened-device-tree model.
                rx-clock = "none";
                tx-clock = "clk9";
                phy-handle = <212000>;
+               phy-connection-type = "gmii";
                pio-handle = <140001>;
        };