* Marvell PXA GPIO controller Required properties: - compatible : Should be "intel,pxa25x-gpio", "intel,pxa26x-gpio", "intel,pxa27x-gpio", "intel,pxa3xx-gpio", "marvell,pxa93x-gpio", "marvell,mmp-gpio", "marvell,mmp2-gpio" or marvell,pxa1928-gpio. - reg : Address and length of the register set for the device - interrupts : Should be the port interrupt shared by all gpio pins. There're three gpio interrupts in arch-pxa, and they're gpio0, gpio1 and gpio_mux. There're only one gpio interrupt in arch-mmp, gpio_mux. - interrupt-names : Should be the names of irq resources. Each interrupt uses its own interrupt name, so there should be as many interrupt names as referenced interrupts. - interrupt-controller : Identifies the node as an interrupt controller. - #interrupt-cells: Specifies the number of cells needed to encode an interrupt source. - gpio-controller : Marks the device node as a gpio controller. - #gpio-cells : Should be one. It is the pin number. Example for a MMP platform: gpio: gpio@d4019000 { compatible = "marvell,mmp-gpio"; reg = <0xd4019000 0x1000>; interrupts = <49>; interrupt-names = "gpio_mux"; gpio-controller; #gpio-cells = <1>; interrupt-controller; #interrupt-cells = <1>; }; Example for a PXA3xx platform: gpio: gpio@40e00000 { compatible = "intel,pxa3xx-gpio"; reg = <0x40e00000 0x10000>; interrupt-names = "gpio0", "gpio1", "gpio_mux"; interrupts = <8 9 10>; gpio-controller; #gpio-cells = <0x2>; interrupt-controller; #interrupt-cells = <0x2>; }; * Marvell Orion GPIO Controller Required properties: - compatible : Should be "marvell,orion-gpio" - reg : Address and length of the register set for controller. - gpio-controller : So we know this is a gpio controller. - ngpio : How many gpios this controller has. - interrupts : Up to 4 Interrupts for the controller. Optional properties: - mask-offset : For SMP Orions, offset for Nth CPU Example: gpio0: gpio@10100 { compatible = "marvell,orion-gpio"; #gpio-cells = <2>; gpio-controller; reg = <0x10100 0x40>; ngpio = <32>; interrupts = <35>, <36>, <37>, <38>; };