| Device-Tree bindings for input/keyboard/adc_keypad.c keyboard driver |
| |
| Required properties: |
| - compatible: Must be "amlogic, adc_keypad". |
| - key_name: Specify the name of different key. |
| - key_num: Specify the quantity of the keys. |
| - key_code: Set the function code corresponding to different key. |
| - key_chan: Set the channel to detect the key, can be set from 0 to 7. |
| - key_val: The adc sampling value of different key, can be set from 0 to 1023. |
| - key_tolerance: tolerance of the adc sampling value, recommend maximum value of 40. |
| |
| Optional properties: |
| - status: Shall be "ok" or "okay" if enabled or "disabled" if disabled. |
| Default is "ok". |
| |
| Example: |
| adc_keypad{ |
| compatible = "amlogic, adc_keypad"; |
| status = "okay"; |
| key_name = "left", "right","up", "down", "enter"; |
| key_num = <5>; |
| key_code = <106 105 103 108 28>; |
| key_chan = <2 2 3 3 3>; |
| key_val = <516 253 516 750 0>; //voltage=0/252/478/692/824mV, val=voltage/1800mV*1023 |
| key_tolerance = <40 40 40 40 40>; |
| }; |
