1Bindings for the Broadcom's brcm,bcm6345-gpio memory-mapped GPIO controllers. 2 3These bindings can be used on any BCM63xx SoC. However, BCM6338 and BCM6345 4are the only ones which don't need a pinctrl driver. 5BCM6338 have 8-bit data and dirout registers, where GPIO state can be read 6and/or written, and the direction changed from input to output. 7BCM6345 have 16-bit data and dirout registers, where GPIO state can be read 8and/or written, and the direction changed from input to output. 9 10Required properties: 11 - compatible: should be "brcm,bcm6345-gpio" 12 - reg-names: must contain 13 "dat" - data register 14 "dirout" - direction (output) register 15 - reg: address + size pairs describing the GPIO register sets; 16 order must correspond with the order of entries in reg-names 17 - #gpio-cells: must be set to 2. The first cell is the pin number and 18 the second cell is used to specify the gpio polarity: 19 0 = active high 20 1 = active low 21 - gpio-controller: Marks the device node as a gpio controller. 22 23Optional properties: 24 - native-endian: use native endian memory. 25 26Examples: 27 - BCM6338: 28 gpio: gpio-controller@fffe0407 { 29 compatible = "brcm,bcm6345-gpio"; 30 reg-names = "dirout", "dat"; 31 reg = <0xfffe0407 1>, <0xfffe040f 1>; 32 33 #gpio-cells = <2>; 34 gpio-controller; 35 }; 36 37 - BCM6345: 38 gpio: gpio-controller@fffe0406 { 39 compatible = "brcm,bcm6345-gpio"; 40 reg-names = "dirout", "dat"; 41 reg = <0xfffe0406 2>, <0xfffe040a 2>; 42 native-endian; 43 44 #gpio-cells = <2>; 45 gpio-controller; 46 }; 47