1* Marvell PXA GPIO controller 2 3Required properties: 4- compatible : Should be "intel,pxa25x-gpio", "intel,pxa26x-gpio", 5 "intel,pxa27x-gpio", "intel,pxa3xx-gpio", 6 "marvell,pxa93x-gpio", "marvell,mmp-gpio", 7 "marvell,mmp2-gpio" or marvell,pxa1928-gpio. 8- reg : Address and length of the register set for the device 9- interrupts : Should be the port interrupt shared by all gpio pins. 10 There're three gpio interrupts in arch-pxa, and they're gpio0, 11 gpio1 and gpio_mux. There're only one gpio interrupt in arch-mmp, 12 gpio_mux. 13- interrupt-names : Should be the names of irq resources. Each interrupt 14 uses its own interrupt name, so there should be as many interrupt names 15 as referenced interrupts. 16- interrupt-controller : Identifies the node as an interrupt controller. 17- #interrupt-cells: Specifies the number of cells needed to encode an 18 interrupt source. 19- gpio-controller : Marks the device node as a gpio controller. 20- #gpio-cells : Should be one. It is the pin number. 21 22Example for a MMP platform: 23 24 gpio: gpio@d4019000 { 25 compatible = "marvell,mmp-gpio"; 26 reg = <0xd4019000 0x1000>; 27 interrupts = <49>; 28 interrupt-names = "gpio_mux"; 29 gpio-controller; 30 #gpio-cells = <1>; 31 interrupt-controller; 32 #interrupt-cells = <1>; 33 }; 34 35Example for a PXA3xx platform: 36 37 gpio: gpio@40e00000 { 38 compatible = "intel,pxa3xx-gpio"; 39 reg = <0x40e00000 0x10000>; 40 interrupt-names = "gpio0", "gpio1", "gpio_mux"; 41 interrupts = <8 9 10>; 42 gpio-controller; 43 #gpio-cells = <0x2>; 44 interrupt-controller; 45 #interrupt-cells = <0x2>; 46 }; 47