i.MX6 Reset Button

Program the reset button

That is exposed to linux as a GPIO key. You can see it in the device-tree here:

arch/arm/boot/dts/imx6qdl-cubox-i.dtsi
pinctrl_gpio_key: gpio-key {
                       fsl,pins = <
                               MX6QDL_PAD_EIM_DA8__GPIO3_IO08  0x17059
                       >;
               };

If you want you can customize this to look like a custom button. https://github.com/SolidRun/linux-stable/blob/linux-4.9.y-imx6/Documentation/devicetree/bindings/input/gpio-keys.txt

Then you would need to write a userspace daemon to listen for the key event and then perform whatever action you wanted depending on the length it was held down for.

Developer Center

i.MX6 Reset Button

Program the reset button

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