44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
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Cadence GPIO controller bindings
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Required properties:
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- compatible: should be "cdns,gpio-r1p02".
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- reg: the register base address and size.
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- #gpio-cells: should be 2.
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* first cell is the GPIO number.
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* second cell specifies the GPIO flags, as defined in
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<dt-bindings/gpio/gpio.h>. Only the GPIO_ACTIVE_HIGH
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and GPIO_ACTIVE_LOW flags are supported.
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- gpio-controller: marks the device as a GPIO controller.
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- clocks: should contain one entry referencing the peripheral clock driving
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the GPIO controller.
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Optional properties:
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- ngpios: integer number of gpio lines supported by this controller, up to 32.
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- interrupts: interrupt specifier for the controllers interrupt.
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- interrupt-controller: marks the device as an interrupt controller. When
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defined, interrupts, interrupt-parent and #interrupt-cells
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are required.
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- interrupt-cells: should be 2.
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* first cell is the GPIO number you want to use as an IRQ source.
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* second cell specifies the IRQ type, as defined in
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<dt-bindings/interrupt-controller/irq.h>.
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Currently only level sensitive IRQs are supported.
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Example:
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gpio0: gpio-controller@fd060000 {
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compatible = "cdns,gpio-r1p02";
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reg =<0xfd060000 0x1000>;
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clocks = <&gpio_clk>;
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interrupt-parent = <&gic>;
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interrupts = <0 5 IRQ_TYPE_LEVEL_HIGH>;
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gpio-controller;
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#gpio-cells = <2>;
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interrupt-controller;
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#interrupt-cells = <2>;
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};
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