40 lines
1.2 KiB
Plaintext
40 lines
1.2 KiB
Plaintext
OMAP GPIO controller bindings
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Required properties:
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- compatible:
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- "ti,omap2-gpio" for OMAP2 controllers
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- "ti,omap3-gpio" for OMAP3 controllers
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- "ti,omap4-gpio" for OMAP4 controllers
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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-controller: Mark the device node as an interrupt controller.
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- #interrupt-cells : Should be 2.
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The first cell is the GPIO number.
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The second cell is used to specify flags:
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bits[3:0] trigger type and level flags:
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1 = low-to-high edge triggered.
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2 = high-to-low edge triggered.
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4 = active high level-sensitive.
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8 = active low level-sensitive.
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OMAP specific properties:
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- ti,hwmods: Name of the hwmod associated to the GPIO:
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"gpio<X>", <X> being the 1-based instance number
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from the HW spec.
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- ti,gpio-always-on: Indicates if a GPIO bank is always powered and
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so will never lose its logic state.
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Example:
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gpio4: gpio4 {
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compatible = "ti,omap4-gpio";
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ti,hwmods = "gpio4";
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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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