63 lines
1.6 KiB
Plaintext
63 lines
1.6 KiB
Plaintext
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Davinci/Keystone GPIO controller bindings
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Required Properties:
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- compatible: should be "ti,dm6441-gpio", "ti,keystone-gpio"
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- reg: Physical base address of the controller and the size of memory mapped
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registers.
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- gpio-controller : Marks the device node as a gpio controller.
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- #gpio-cells : Should be two.
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- first cell is the pin number
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- second cell is used to specify optional parameters (unused)
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- interrupt-parent: phandle of the parent interrupt controller.
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- interrupts: Array of GPIO interrupt number. Only banked or unbanked IRQs are
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supported at a time.
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- ti,ngpio: The number of GPIO pins supported.
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- ti,davinci-gpio-unbanked: The number of GPIOs that have an individual interrupt
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line to processor.
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The GPIO controller also acts as an interrupt controller. It uses the default
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two cells specifier as described in Documentation/devicetree/bindings/
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interrupt-controller/interrupts.txt.
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Example:
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gpio: gpio@1e26000 {
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compatible = "ti,dm6441-gpio";
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gpio-controller;
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#gpio-cells = <2>;
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reg = <0x226000 0x1000>;
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interrupt-parent = <&intc>;
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interrupts = <42 IRQ_TYPE_EDGE_BOTH 43 IRQ_TYPE_EDGE_BOTH
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44 IRQ_TYPE_EDGE_BOTH 45 IRQ_TYPE_EDGE_BOTH
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46 IRQ_TYPE_EDGE_BOTH 47 IRQ_TYPE_EDGE_BOTH
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48 IRQ_TYPE_EDGE_BOTH 49 IRQ_TYPE_EDGE_BOTH
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50 IRQ_TYPE_EDGE_BOTH>;
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ti,ngpio = <144>;
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ti,davinci-gpio-unbanked = <0>;
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interrupt-controller;
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#interrupt-cells = <2>;
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};
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leds {
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compatible = "gpio-leds";
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led1 {
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label = "davinci:green:usr1";
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gpios = <&gpio 10 GPIO_ACTIVE_HIGH>;
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...
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};
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led2 {
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label = "davinci:red:debug1";
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gpios = <&gpio 11 GPIO_ACTIVE_HIGH>;
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...
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};
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};
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