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38 lines
1.1 KiB
38 lines
1.1 KiB
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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