User overlay on Armbian

Add new dts file to /boot/overlay-user

cd /boot/overlay-user more example https://github.com/armbian/sunxi-DT-overlays/tree/master/examples

e.g. power-button.dts

/dts-v1/; 
/plugin/; 
/ { 
        compatible = "allwinner,sun4i-a10", "allwinner,sun7i-a20", "allwinner,sun8i-h3", "allwinner,sun50i-a64", "allwinner,sun50i-h5"; 
        /* 
         * This fragment is needed only for the internal pull-up activation, 
         * external pull-up resistor is highly recommended if using long wires 
         */ 
        fragment@0 { 
                target = <&pio>; 
                __overlay__ { 
                        gpio_button_0: gpio_button_0 { 
                                pins = "PA17"; 
                                function = "gpio_in"; 
                                bias-pull-up; 
                        }; 
                }; 
        }; 
        fragment@1 { 
                target-path = "/"; 
                __overlay__ { 
                        gpio-keys-user { 
                                /* 
                                 * Use "gpio-keys" for EINT capable pins, "gpio-keys-polled" for other pins 
                                 * add "poll-interval" property if using "gpio-keys-polled" 
                                 */ 
                                compatible = "gpio-keys"; 
                                pinctrl-names = "default"; 
                                pinctrl-0 = <&gpio_button_0>; 
                                power_button { 
                                        label = "GPIO Key Power"; 
                                        linux,code = <116>; /* KEY_POWER, see include/uapi/linux/input-event-codes.h */ 
                                        gpios = <&pio 0 17 1>; /* PA17 GPIO_ACTIVE_LOW */ 
                                }; 
                        }; 
                }; 
        }; 
};

e.g. rtc.dts

/dts-v1/; 
/plugin/; 
/ { 
	compatible = "allwinner,sun4i-a10", "allwinner,sun7i-a20", "allwinner,sun8i-h3", "allwinner,sun50i-a64", "allwinner,sun50i-h5"; 
	/*  
	 * Aliases can be used to set the external RTC as rtc0 
	 * Needs supplying the correct path to the I2C controller RTC is connected to, 
	 * this example is for I2C0 on H3 
	 * NOTE: setting time at boot by the kernel 
	 * may not work in some cases if the external RTC module is loaded too late 
	 */ 
	fragment@0 { 
		target-path = "/aliases"; 
		__overlay__ { 
			rtc0 = "/soc/i2c@01c2b000/ds3231@68"; 
		}; 
	}; 
	fragment@1 { 
		target = <&i2c0>; 
		__overlay__ { 
			#address-cells = <1>; 
			#size-cells = <0>; 
			ds3231@68 { 
				compatible = "dallas,ds3231"; 
				reg = <0x68>; 
				status = "okay"; 
			}; 
		}; 
	}; 
};

Compile dts file

armbian-add-overlay power-button.dts

Example

root@nanopineo:/boot/overlay-user# armbian-add-overlay power-button.dts 
Compiling the overlay 
Copying the compiled overlay file to /boot/overlay-user/ 
Overlay power-button was already added to /boot/armbianEnv.txt, skipping 
Reboot is required to apply the changes 
root@nanopineo:/boot/overlay-user#