0001 Bindings for the Western Digital's MyBook Live memory-mapped GPIO controllers.
0002
0003 The Western Digital MyBook Live has two memory-mapped GPIO controllers.
0004 Both GPIO controller only have a single 8-bit data register, where GPIO
0005 state can be read and/or written.
0006
0007 Required properties:
0008 - compatible: should be "wd,mbl-gpio"
0009 - reg-names: must contain
0010 "dat" - data register
0011 - reg: address + size pairs describing the GPIO register sets;
0012 order must correspond with the order of entries in reg-names
0013 - #gpio-cells: must be set to 2. The first cell is the pin number and
0014 the second cell is used to specify the gpio polarity:
0015 0 = active high
0016 1 = active low
0017 - gpio-controller: Marks the device node as a gpio controller.
0018
0019 Optional properties:
0020 - no-output: GPIOs are read-only.
0021
0022 Examples:
0023 gpio0: gpio0@e0000000 {
0024 compatible = "wd,mbl-gpio";
0025 reg-names = "dat";
0026 reg = <0xe0000000 0x1>;
0027 #gpio-cells = <2>;
0028 gpio-controller;
0029 };
0030
0031 gpio1: gpio1@e0100000 {
0032 compatible = "wd,mbl-gpio";
0033 reg-names = "dat";
0034 reg = <0xe0100000 0x1>;
0035 #gpio-cells = <2>;
0036 gpio-controller;
0037 no-output;
0038 };
