39 lines
1.1 KiB
Plaintext
39 lines
1.1 KiB
Plaintext
Bindings for the Western Digital's MyBook Live memory-mapped GPIO controllers.
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The Western Digital MyBook Live has two memory-mapped GPIO controllers.
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Both GPIO controller only have a single 8-bit data register, where GPIO
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state can be read and/or written.
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Required properties:
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- compatible: should be "wd,mbl-gpio"
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- reg-names: must contain
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"dat" - data register
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- reg: address + size pairs describing the GPIO register sets;
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order must correspond with the order of entries in reg-names
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- #gpio-cells: must be set to 2. The first cell is the pin number and
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the second cell is used to specify the gpio polarity:
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0 = active high
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1 = active low
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- gpio-controller: Marks the device node as a gpio controller.
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Optional properties:
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- no-output: GPIOs are read-only.
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Examples:
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gpio0: gpio0@e0000000 {
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compatible = "wd,mbl-gpio";
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reg-names = "dat";
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reg = <0xe0000000 0x1>;
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#gpio-cells = <2>;
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gpio-controller;
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};
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gpio1: gpio1@e0100000 {
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compatible = "wd,mbl-gpio";
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reg-names = "dat";
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reg = <0xe0100000 0x1>;
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#gpio-cells = <2>;
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gpio-controller;
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no-output;
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};
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