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diff --git a/Documentation/devicetree/bindings/clock/st/st,clkgen.txt b/Documentation/devicetree/bindings/clock/st/st,clkgen.txt
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+Binding for a Clockgen hardware block found on
+certain STMicroelectronics consumer electronics SoC devices.
+
+A Clockgen node can contain pll, diviser or multiplexer nodes.
+
+We will find only the base address of the Clockgen, this base
+address is common of all subnode.
+
+	clockgen_node {
+		reg = <>;
+
+		pll_node {
+			...
+		};
+
+		prediv_node {
+			...
+		};
+
+		divmux_node {
+			...
+		};
+
+		quadfs_node {
+			...
+		};
+		...
+	};
+
+This binding uses the common clock binding[1].
+Each subnode should use the binding discribe in [2]..[4]
+
+[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+[2] Documentation/devicetree/bindings/clock/st,quadfs.txt
+[3] Documentation/devicetree/bindings/clock/st,quadfs.txt
+[4] Documentation/devicetree/bindings/clock/st,quadfs.txt
+
+Required properties:
+- reg : A Base address and length of the register set.
+
+Example:
+
+	clockgenA@fee62000 {
+
+		reg = <0xfee62000 0xb48>;
+
+		CLK_S_A0_PLL: CLK_S_A0_PLL {
+			#clock-cells = <1>;
+			compatible = "st,clkgena-plls-c65";
+
+			clocks = <&CLK_SYSIN>;
+
+			clock-output-names = "CLK_S_A0_PLL0_HS",
+					     "CLK_S_A0_PLL0_LS",
+					     "CLK_S_A0_PLL1";
+		};
+
+		CLK_S_A0_OSC_PREDIV: CLK_S_A0_OSC_PREDIV {
+			#clock-cells = <0>;
+			compatible = "st,clkgena-prediv-c65",
+				     "st,clkgena-prediv";
+
+			clocks = <&CLK_SYSIN>;
+
+			clock-output-names = "CLK_S_A0_OSC_PREDIV";
+		};
+
+		CLK_S_A0_HS: CLK_S_A0_HS {
+			#clock-cells = <1>;
+			compatible = "st,clkgena-divmux-c65-hs",
+				     "st,clkgena-divmux";
+
+			clocks = <&CLK_S_A0_OSC_PREDIV>,
+				 <&CLK_S_A0_PLL 0>, /* PLL0 HS */
+				 <&CLK_S_A0_PLL 2>; /* PLL1 */
+
+			clock-output-names = "CLK_S_FDMA_0",
+					     "CLK_S_FDMA_1",
+					     ""; /* CLK_S_JIT_SENSE */
+					     /* Fourth output unused */
+		};
+	};
+