dt-bindings: phy-mtk-tphy: add the properties about address mapping

Add three required properties about the address mapping, including
'#address-cells', '#size-cells' and 'ranges'

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-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 a859b0d..dd75b67 100644 (file)
--- a/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
+++ b/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
@@ -14,6 +14,16 @@ Required properties (controller (parent) node):
                  make use of "mediatek,generic-tphy-v1" on mt2701 instead and
                  "mediatek,generic-tphy-v2" on mt2712 instead.
 
+- #address-cells:      the number of cells used to represent physical
+               base addresses.
+- #size-cells: the number of cells used to represent the size of an address.
+- ranges:      the address mapping relationship to the parent, defined with
+               - empty value: if optional 'reg' is used.
+               - non-empty value: if optional 'reg' is not used. should set
+                       the child's base address to 0, the physical address
+                       within parent's address space, and the length of
+                       the address map.
+
 Required nodes : a sub-node is required for each port the controller
                  provides. Address range information including the usual
                  'reg' property is used inside these nodes to describe