dt-bindings: phy-mtk-tphy: make the ref clock optional

Make the ref clock optional, then we no need refer to a fixed-clock
in DTS anymore when the clock of USB3 PHY comes from oscillator
directly

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 ce6abfb..1f4a36d 100644 (file)
--- a/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
+++ b/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
@@ -34,12 +34,6 @@ Optional properties (controller (parent) node):
 
 Required properties (port (child) node):
 - reg          : address and length of the register set for the port.
-- clocks       : a list of phandle + clock-specifier pairs, one for each
-                 entry in clock-names
-- clock-names  : must contain
-                 "ref": 48M reference clock for HighSpeed analog phy; and 26M
-                       reference clock for SuperSpeed analog phy, sometimes is
-                       24M, 25M or 27M, depended on platform.
 - #phy-cells   : should be 1 (See second example)
                  cell after port phandle is phy type from:
                        - PHY_TYPE_USB2
@@ -48,6 +42,13 @@ Required properties (port (child) node):
                        - PHY_TYPE_SATA
 
 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
+                       24M, 25M or 27M, depended on platform.
+
 - mediatek,eye-src     : u32, the value of slew rate calibrate
 - mediatek,eye-vrt     : u32, the selection of VRT reference voltage
 - mediatek,eye-term    : u32, the selection of HS_TX TERM reference voltage