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diff --git a/Documentation/devicetree/bindings/gpio/gpio-tz1090.txt b/Documentation/devicetree/bindings/gpio/gpio-tz1090.txt
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+++ b/Documentation/devicetree/bindings/gpio/gpio-tz1090.txt
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+ImgTec TZ1090 GPIO Controller
+
+Required properties:
+- compatible: Compatible property value should be "img,tz1090-gpio".
+
+- reg: Physical base address of the controller and length of memory mapped
+  region.
+
+- #address-cells: Should be 1 (for bank subnodes)
+
+- #size-cells: Should be 0 (for bank subnodes)
+
+- Each bank of GPIOs should have a subnode to represent it.
+
+  Bank subnode required properties:
+  - reg: Index of bank in the range 0 to 2.
+
+  - gpio-controller: Specifies that the node is a gpio controller.
+
+  - #gpio-cells: Should be 2. The syntax of the gpio specifier used by client
+    nodes should have the following values.
+       <[phandle of the gpio controller node]
+        [gpio number within the gpio bank]
+        [gpio flags]>
+
+    Values for gpio specifier:
+    - GPIO number: a value in the range 0 to 29.
+    - GPIO flags: bit field of flags, as defined in <dt-bindings/gpio/gpio.h>.
+      Only the following flags are supported:
+        GPIO_ACTIVE_HIGH
+        GPIO_ACTIVE_LOW
+
+  Bank subnode optional properties:
+  - gpio-ranges: Mapping to pin controller pins (as described in
+    Documentation/devicetree/bindings/gpio/gpio.txt)
+
+  - interrupts: Interrupt for the entire bank
+
+  - interrupt-controller: Specifies that the node is an interrupt controller
+
+  - #interrupt-cells: Should be 2. The syntax of the interrupt specifier used by
+    client nodes should have the following values.
+       <[phandle of the interurupt controller]
+        [gpio number within the gpio bank]
+        [irq flags]>
+
+    Values for irq specifier:
+    - GPIO number: a value in the range 0 to 29
+    - IRQ flags: value to describe edge and level triggering, as defined in
+      <dt-bindings/interrupt-controller/irq.h>. Only the following flags are
+      supported:
+        IRQ_TYPE_EDGE_RISING
+        IRQ_TYPE_EDGE_FALLING
+        IRQ_TYPE_EDGE_BOTH
+        IRQ_TYPE_LEVEL_HIGH
+        IRQ_TYPE_LEVEL_LOW
+
+
+
+Example:
+
+        gpios: gpio-controller@02005800 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                compatible = "img,tz1090-gpio";
+                reg = <0x02005800 0x90>;
+
+                /* bank 0 with an interrupt */
+                gpios0: bank@0 {
+                        #gpio-cells = <2>;
+                        #interrupt-cells = <2>;
+                        reg = <0>;
+                        interrupts = <13 IRQ_TYPE_LEVEL_HIGH>;
+                        gpio-controller;
+                        gpio-ranges = <&pinctrl 0 0 30>;
+                        interrupt-controller;
+                };
+
+                /* bank 2 without interrupt */
+                gpios2: bank@2 {
+                        #gpio-cells = <2>;
+                        reg = <2>;
+                        gpio-controller;
+                        gpio-ranges = <&pinctrl 0 60 30>;
+                };
+        };
+
+