Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) ADC attached resistor ladder buttons
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) ------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) Required properties:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  - compatible: "adc-keys"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  - io-channels: Phandle to an ADC channel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  - io-channel-names = "buttons";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  - keyup-threshold-microvolt: Voltage at which all the keys are considered up.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) Optional properties:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 	- poll-interval: Poll interval time in milliseconds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	- autorepeat: Boolean, Enable auto repeat feature of Linux input
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	  subsystem.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) Each button (key) is represented as a sub-node of "adc-keys":
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) Required subnode-properties:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	- label: Descriptive name of the key.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	- linux,code: Keycode to emit.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	- press-threshold-microvolt: Voltage ADC input when this key is pressed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) Example:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <dt-bindings/input/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	adc-keys {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		compatible = "adc-keys";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		io-channels = <&lradc 0>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		io-channel-names = "buttons";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		keyup-threshold-microvolt = <2000000>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		button-up {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 			label = "Volume Up";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 			linux,code = <KEY_VOLUMEUP>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 			press-threshold-microvolt = <1500000>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 		button-down {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 			label = "Volume Down";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 			linux,code = <KEY_VOLUMEDOWN>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 			press-threshold-microvolt = <1000000>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		button-enter {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 			label = "Enter";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 			linux,code = <KEY_ENTER>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 			press-threshold-microvolt = <500000>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	};