59 lines
1.7 KiB
Plaintext
59 lines
1.7 KiB
Plaintext
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* NXP LPC32xx MIC, SIC1 and SIC2 Interrupt Controllers
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Required properties:
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- compatible: "nxp,lpc3220-mic" or "nxp,lpc3220-sic".
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- reg: should contain IC registers location and length.
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- interrupt-controller: identifies the node as an interrupt controller.
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- #interrupt-cells: the number of cells to define an interrupt, should be 2.
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The first cell is the IRQ number, the second cell is used to specify
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one of the supported IRQ types:
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IRQ_TYPE_EDGE_RISING = low-to-high edge triggered,
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IRQ_TYPE_EDGE_FALLING = high-to-low edge triggered,
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IRQ_TYPE_LEVEL_HIGH = active high level-sensitive,
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IRQ_TYPE_LEVEL_LOW = active low level-sensitive.
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Reset value is IRQ_TYPE_LEVEL_LOW.
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Optional properties:
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- interrupts: empty for MIC interrupt controller, cascaded MIC
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hardware interrupts for SIC1 and SIC2
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Examples:
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/* LPC32xx MIC, SIC1 and SIC2 interrupt controllers */
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mic: interrupt-controller@40008000 {
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compatible = "nxp,lpc3220-mic";
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reg = <0x40008000 0x4000>;
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interrupt-controller;
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#interrupt-cells = <2>;
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};
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sic1: interrupt-controller@4000c000 {
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compatible = "nxp,lpc3220-sic";
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reg = <0x4000c000 0x4000>;
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interrupt-controller;
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#interrupt-cells = <2>;
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interrupt-parent = <&mic>;
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interrupts = <0 IRQ_TYPE_LEVEL_LOW>,
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<30 IRQ_TYPE_LEVEL_LOW>;
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};
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sic2: interrupt-controller@40010000 {
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compatible = "nxp,lpc3220-sic";
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reg = <0x40010000 0x4000>;
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interrupt-controller;
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#interrupt-cells = <2>;
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interrupt-parent = <&mic>;
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interrupts = <1 IRQ_TYPE_LEVEL_LOW>,
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<31 IRQ_TYPE_LEVEL_LOW>;
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};
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/* ADC */
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adc@40048000 {
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compatible = "nxp,lpc3220-adc";
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reg = <0x40048000 0x1000>;
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interrupt-parent = <&sic1>;
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interrupts = <7 IRQ_TYPE_LEVEL_HIGH>;
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};
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