|  | * Freescale i.MX/MXC GPIO controller | 
|  |  | 
|  | Required properties: | 
|  | - compatible : Should be "fsl,<soc>-gpio" | 
|  | - reg : Address and length of the register set for the device | 
|  | - interrupts : Should be the port interrupt shared by all 32 pins, if | 
|  | one number.  If two numbers, the first one is the interrupt shared | 
|  | by low 16 pins and the second one is for high 16 pins. | 
|  | - gpio-controller : Marks the device node as a gpio controller. | 
|  | - #gpio-cells : Should be two.  The first cell is the pin number and | 
|  | the second cell is used to specify optional parameters (currently | 
|  | unused). | 
|  |  | 
|  | Example: | 
|  |  | 
|  | gpio0: gpio@73f84000 { | 
|  | compatible = "fsl,imx51-gpio", "fsl,imx31-gpio"; | 
|  | reg = <0x73f84000 0x4000>; | 
|  | interrupts = <50 51>; | 
|  | gpio-controller; | 
|  | #gpio-cells = <2>; | 
|  | }; |