dt-bindings: phy-mtk-tphy: add a new reference clock

Usually the digital and analog phys use the same reference clock,
but on some platforms, they are separated, so add another optional
clock to support it.
In order to keep the clock names consistent with PHY IP's, use
the da_ref for analog phy and ref clock for digital phy.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

diff --git a/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt b/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
index 48bc1a2e9299e860aaf3b297af406239cefe231b..a859b0db4051420b325802f2eb69f7b9c1012592 100644 (file)
--- a/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
+++ b/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
@@ -41,9 +41,12 @@ Optional properties (PHY_TYPE_USB2 port (child) node):
 - clocks       : a list of phandle + clock-specifier pairs, one for each
                  entry in clock-names
 - clock-names  : may contain
-                 "ref": 48M reference clock for HighSpeed anolog phy; and 26M
-                       reference clock for SuperSpeed anolog phy, sometimes is
+                 "ref": 48M reference clock for HighSpeed (digital) phy; and 26M
+                       reference clock for SuperSpeed (digital) phy, sometimes is
                        24M, 25M or 27M, depended on platform.
+                 "da_ref": the reference clock of analog phy, used if the clocks
+                       of analog and digital phys are separated, otherwise uses
+                       "ref" clock only if needed.
 
 - mediatek,eye-src     : u32, the value of slew rate calibrate
 - mediatek,eye-vrt     : u32, the selection of VRT reference voltage