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Diffstat (limited to 'Documentation/devicetree/bindings/gpio/wd,mbl-gpio.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/wd,mbl-gpio.txt | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/wd,mbl-gpio.txt b/Documentation/devicetree/bindings/gpio/wd,mbl-gpio.txt new file mode 100644 index 000000000..038c3a6a1 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/wd,mbl-gpio.txt @@ -0,0 +1,38 @@ +Bindings for the Western Digital's MyBook Live memory-mapped GPIO controllers. + +The Western Digital MyBook Live has two memory-mapped GPIO controllers. +Both GPIO controller only have a single 8-bit data register, where GPIO +state can be read and/or written. + +Required properties: + - compatible: should be "wd,mbl-gpio" + - reg-names: must contain + "dat" - data register + - reg: address + size pairs describing the GPIO register sets; + order must correspond with the order of entries in reg-names + - #gpio-cells: must be set to 2. The first cell is the pin number and + the second cell is used to specify the gpio polarity: + 0 = active high + 1 = active low + - gpio-controller: Marks the device node as a gpio controller. + +Optional properties: + - no-output: GPIOs are read-only. + +Examples: + gpio0: gpio0@e0000000 { + compatible = "wd,mbl-gpio"; + reg-names = "dat"; + reg = <0xe0000000 0x1>; + #gpio-cells = <2>; + gpio-controller; + }; + + gpio1: gpio1@e0100000 { + compatible = "wd,mbl-gpio"; + reg-names = "dat"; + reg = <0xe0100000 0x1>; + #gpio-cells = <2>; + gpio-controller; + no-output; + }; |