RK3399 gpio 做系统按键

一.kernel\arch\arm64\boot\dts\rockchip\rk3399-android.dtsi

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rk_key: rockchip-key {     compatible = "rockchip,key";     status = "okay";       //io-channels = <&saradc 0>;       vol-up-key {         linux,code = <115>;         label = "volume up";         rockchip,adc_value = <1>;     };       vol-down-key {         linux,code = <114>;         label = "volume down";         rockchip,adc_value = <170>;     };       power-key {         gpios = <&gpio0 5 GPIO_ACTIVE_LOW>;         linux,code = <116>;         label = "power";         gpio-key,wakeup;     };           gpio1-key {         gpios = <&gpio2 4 GPIO_ACTIVE_LOW>;         linux,code = <131>;         label = "gpio1 key";         gpio-key,wakeup;     };              };

二.frameworks\native\include\android\keycodes.h

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/** F1 key. */ AKEYCODE_F1              = 131, /** F2 key. */ AKEYCODE_F2              = 132, /** F3 key. */ AKEYCODE_F3              = 133,

三.rk29-keypad.kl  加按键值

系统 优先加载  system\usr\keylayout\rk29-keypad.kl   

device\rockchip\common\rk29-keypad.kl

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key 59    MENU key 102   HOME key 114   VOLUME_DOWN key 115   VOLUME_UP key 116   POWER key 143   NOTIFICATION key 158   BACK key 212   CAMERA key 217   SEARCH key 131   F1 key 132   F2 key 133   F3

四.frameworks\base\services\core\java\com\android\server\policy\PhoneWindowManager.java 　

　　public long interceptKeyBeforeDispatching(WindowState win, KeyEvent event, int policyFlags) {

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else if(keyCode == 131){            if (!down) {           //Log.d("gatsby", "gpio1_key xh_flag-> " + xh_flag +" gpio1_key  num->"+gpio1_key);           if(xh_flag){              if(gpio1_key %2 !=0){                   RootCommand("settings put system screen_brightness 255");                   toastTest("Highlight mode!");                                  }else {                   RootCommand("settings put system screen_brightness 110");                   toastTest("Normal brightness!");              }           }             gpio1_key++;                                }           return -1; }