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24 lines
799 B
24 lines
799 B
* IBM/AMCC/APM GPIO Controller for PowerPC 4XX series and compatible SoCs |
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All GPIOs are pin-shared with other functions. DCRs control whether a |
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particular pin that has GPIO capabilities acts as a GPIO or is used for |
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another purpose. GPIO outputs are separately programmable to emulate |
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an open-drain driver. |
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Required properties: |
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- compatible: must be "ibm,ppc4xx-gpio" |
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- reg: address and length of the register set for the device |
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- #gpio-cells: must be set to 2. The first cell is the pin number |
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and 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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Example: |
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GPIO0: gpio@ef600b00 { |
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compatible = "ibm,ppc4xx-gpio"; |
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reg = <0xef600b00 0x00000048>; |
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#gpio-cells = <2>; |
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gpio-controller; |
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};
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