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37 lines
1,000 B
Text
37 lines
1,000 B
Text
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* MAX7320 I/O expanders
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The original maxim 7320 i/o expander offers 8 bit push/pull outputs.
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There exists some clones which offers 16 bit.
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Required Properties:
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- compatible: should be one of the following.
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- "maxim,max7320"
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- reg: I2C slave address.
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- gpio-controller: Marks the device node as a gpio controller.
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- #gpio-cells: Should be 2. The first cell is the GPIO number and the second
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cell specifies GPIO flags, as defined in <dt-bindings/gpio/gpio.h>. Only the
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GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported.
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Optional Properties:
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- ngpios: tell the driver how many gpios the device offers.
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if the property is omitted, 8bit (original maxim) is assumed.
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Please refer to gpio.txt in this directory for details of the common GPIO
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bindings used by client devices.
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Example: MAX7320 I/O expander node
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ledgpio: max7320@5d {
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status = "okay";
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compatible = "maxim,max7320";
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reg = <0x5d>;
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#gpio-cells = <2>;
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gpio-controller;
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ngpios = <16>;
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};
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