31 lines
1 KiB
Plaintext
31 lines
1 KiB
Plaintext
* 74XX MMIO GPIO driver
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Required properties:
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- compatible: Should contain one of the following:
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"ti,741g125": for 741G125 (1-bit Input),
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"ti,741g174": for 741G74 (1-bit Output),
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"ti,742g125": for 742G125 (2-bit Input),
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"ti,7474" : for 7474 (2-bit Output),
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"ti,74125" : for 74125 (4-bit Input),
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"ti,74175" : for 74175 (4-bit Output),
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"ti,74365" : for 74365 (6-bit Input),
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"ti,74174" : for 74174 (6-bit Output),
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"ti,74244" : for 74244 (8-bit Input),
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"ti,74273" : for 74273 (8-bit Output),
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"ti,741624" : for 741624 (16-bit Input),
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"ti,7416374": for 7416374 (16-bit Output).
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- reg: Physical base address and length where IC resides.
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- gpio-controller: Marks the device node as a gpio controller.
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- #gpio-cells: Should be two. 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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Example:
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ctrl: gpio@30008004 {
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compatible = "ti,74174";
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reg = <0x30008004 0x1>;
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gpio-controller;
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#gpio-cells = <2>;
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};
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