58 lines
1.6 KiB
Plaintext
58 lines
1.6 KiB
Plaintext
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STM32 External Interrupt Controller
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Required properties:
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- compatible: Should be:
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"st,stm32-exti"
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"st,stm32h7-exti"
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"st,stm32mp1-exti"
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- reg: Specifies base physical address and size of the registers
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- interrupt-controller: Indentifies the node as an interrupt controller
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- #interrupt-cells: Specifies the number of cells to encode an interrupt
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specifier, shall be 2
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- interrupts: interrupts references to primary interrupt controller
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(only needed for exti controller with multiple exti under
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same parent interrupt: st,stm32-exti and st,stm32h7-exti)
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Optional properties:
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- hwlocks: reference to a phandle of a hardware spinlock provider node.
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Exti could have several parent interrupt controllers. In this case child nodes
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are used to describe those "extra" parent controllers. Properties to use are:
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- interrupt-controller: Indentifies the node as an interrupt controller
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- #interrupt-cells: Specifies the number of cells to encode an interrupt
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specifier, shall be 2
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- interrupt-parent: Phandle to the interrupt parent node.
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- st,irq-number: Interrupt number mapped on the parent.
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See example 2.
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Example 1:
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exti: interrupt-controller@40013c00 {
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compatible = "st,stm32-exti";
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interrupt-controller;
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#interrupt-cells = <2>;
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reg = <0x40013C00 0x400>;
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interrupts = <1>, <2>, <3>, <6>, <7>, <8>, <9>, <10>, <23>, <40>, <41>, <42>, <62>, <76>;
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};
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Example 2:
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exti: interrupt-controller@5000d000 {
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compatible = "st,stm32mp1-exti", "syscon";
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interrupt-controller;
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#interrupt-cells = <2>;
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reg = <0x5000d000 0x400>;
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exti_pwr: exti-pwr {
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interrupt-controller;
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#interrupt-cells = <2>;
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interrupt-parent = <&pwr>;
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st,irq-number = <6>;
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};
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};
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