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diff --git a/kernel/Documentation/devicetree/bindings/pinctrl/pinctrl-atlas7.txt b/kernel/Documentation/devicetree/bindings/pinctrl/pinctrl-atlas7.txt
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+CSR SiRFatlas7 pinmux controller
+
+Required properties:
+- compatible	: "sirf,atlas7-ioc"
+- reg		: Address range of the pinctrl registers
+
+For example, pinctrl might have properties like the following:
+	pinctrl: ioc@18880000 {
+			compatible = "sirf,atlas7-ioc";
+			reg = <0x18880000 0x1000>;
+
+			a_ac97_pmx: ac97@0 {
+				ac97 {
+					groups = "audio_ac97_grp";
+					function = "audio_ac97";
+				};
+			};
+
+			...
+
+			sd2_pmx: sd2@0 {
+				sd2 {
+					groups = "sd2_grp0";
+					function = "sd2";
+				};
+			};
+
+			...
+
+
+			sample0_cfg: sample0@0 {
+				sample0 {
+					pins = "ldd_0", "ldd_1";
+					bias-pull-up;
+				};
+			};
+
+			sample1_cfg: sample1@0 {
+				sample1 {
+					pins = "ldd_2", "ldd_3";
+					input-schmitt-enable;
+				};
+			};
+
+			sample2_cfg: sample2@0 {
+				sample2 {
+					groups = "uart4_nopause_grp";
+					bias-pull-down;
+				};
+			};
+
+			sample3_cfg: sample3@0 {
+				sample3 {
+					pins = "ldd_4", "ldd_5";
+					drive-strength = <2>;
+				};
+			};
+	};
+
+Please refer to pinctrl-bindings.txt in this directory for details of the common
+pinctrl bindings used by client devices.
+
+SiRFatlas7's pinmux nodes act as a container for an abitrary number of subnodes.
+Each of these subnodes represents some desired configuration for a group of pins.
+
+Required subnode-properties:
+- groups : An array of strings. Each string contains the name of a group.
+- function: A string containing the name of the function to mux to the
+  group.
+
+  Valid values for group and function names can be found from looking at the
+  group and function arrays in driver files:
+  drivers/pinctrl/pinctrl-sirf.c
+
+For example, pinctrl might have subnodes like the following:
+	sd0_pmx: sd0@0 {
+		sd0 {
+			groups = "sd0_grp";
+			function = "sd0";
+		};
+	};
+
+	sd1_pmx0: sd1@0 {
+		sd1 {
+			groups = "sd1_grp0";
+			function = "sd1_m0";
+		};
+	};
+
+	sd1_pmx1: sd1@1 {
+		sd1 {
+			groups = "sd1_grp1";
+			function = "sd1_m1";
+		};
+	};
+
+For a specific board, if it wants to use sd1,
+it can add the following to its board-specific .dts file.
+sd1: sd@0x12340000 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&sd1_pmx0>;
+}
+
+or
+
+sd1: sd@0x12340000 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&sd1_pmx1>;
+}