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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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25 lines
799 B
Plaintext
25 lines
799 B
Plaintext
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* 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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