How does GPIO support Interrupt on the Jetson Orin module?

[michael.wu2]

I really didn’t find much information across documents, regarding to how to use the Orin module’s GPIO as interrupts. I did see a similar topic but it is not about Jetson Orin, FYI, here is the link, GPIO With Interrupts

Any way my question is more focused on the hardware and GPIO capability: Can we use a GPIO as Interrupt to the Orin module processor? And how many ways to configure the Interrupt trigger source (see below list)?
1), Trigger an interrupt at GPIO logic-high state.
2), Trigger an interrupt at GPIO logic-low state.
3), Trigger an interrupt at GPIO falling edge (high-to-low state transition).
4), Trigger an interrupt at GPIO rising edge (low-to-high state transition).

Looking forward to hearing from you soon. Thanks

[JerryChang]

hello michael.wu2,

may I know what’s the actual use-case,
please check reference driver for using GPIO interrupt.
for example, $public_sources/kernel_src/hardware/nvidia/platform/t23x/concord/kernel-dts/cvb/tegra234-p3737-0000-a00.dtsi

	i2c@c240000 {
		ucsi_ccg: ucsi_ccg@8 {
			status = "okay";
			compatible = "nvidia,ccgx-ucsi";
			ccgx,firmware-build = "gn";
			reg = <0x08>;
			interrupt-parent = <&tegra_aon_gpio>;
			interrupts = <TEGRA234_AON_GPIO(BB, 2) IRQ_TYPE_LEVEL_LOW>;
			interrupt-names = "wakeup";
			wakeup-source;

[michael.wu2]

Thanks for the code sample.
Regarding to your “>> may I know what’s the actual use-case”, let me rephrase my questions as 4-different use cases:
1), A GPIO line enters logic-high state, can it be mapped to generate an interrupt?
2), A GPIO line enters logic-low state, can it be mapped to generate an interrupt?
3), A falling edge occurs on a GPIO line (high-to-low state transition), can it be mapped to generate an interrupt?
4), A rising edge occurs on a GPIO line (low-to-high state transition), can it be mapped to generate an interrupt?

From above code, the “IRQ_TYPE_LEVEL_LOW” appears to generate an interrupt upon logic-low state on a GPIO line which is my use case #2. Now the questions may turn to, how many IRQ TYPE are available?

[michael.wu2]

Ok, found the data I need from SOC reference manual DP-10508-002. All 4 trigger modes are supported. Let’s close this item. Thank you for the support