How to enable power button in Beaglebone Black Rev C?
Here is my device tree from i2c and tps:

    i2c0_pins: pinmux_i2c0_pins {
       pinctrl-single,pins = <
           AM33XX_IOPAD(0x988, PIN_INPUT_PULLUP | MUX_MODE0)   /* 
i2c0_sda.i2c0_sda */
           AM33XX_IOPAD(0x98c, PIN_INPUT_PULLUP | MUX_MODE0)   /* 
i2c0_scl.i2c0_scl */
       >;
   };

&i2c0 {
   pinctrl-names = "default";
   pinctrl-0 = <&i2c0_pins>;

    status = "okay";
   clock-frequency = <400000>;

    tps: tps@24 {
       reg = <0x24>;
   };

    baseboard_eeprom: baseboard_eeprom@50 {
       compatible = "atmel,24c256";
       reg = <0x50>;

        #address-cells = <1>;
       #size-cells = <1>;
       baseboard_data: baseboard_data@0 {
           reg = <0 0x100>;
       };
   };
};

&tps {
   /*
    * Configure pmic to enter OFF-state instead of SLEEP-state ("RTC-only
    * mode") at poweroff.  Most BeagleBone versions do not support RTC-only
    * mode and risk hardware damage if this mode is entered.
    *
    * For details, see linux-omap mailing list May 2015 thread
    *  [PATCH] ARM: dts: am335x-bone* enable pmic-shutdown-controller
    * In particular, messages:
    *  http://www.spinics.net/lists/linux-omap/msg118585.html
    *  http://www.spinics.net/lists/linux-omap/msg118615.html
    *
    * You can override this later with
    *  &tps {  /delete-property/ ti,pmic-shutdown-controller;  }
    * if you want to use RTC-only mode and made sure you are not affected
    * by the hardware problems. (Tip: double-check by performing a current
    * measurement after shutdown: it should be less than 1 mA.)
    */

    interrupts = <7>; /* NMI */
   interrupt-parent = <&intc>;

    ti,pmic-shutdown-controller;

    charger {
       status = "okay";
   };

    pwrbutton {
       status = "okay";
   };

    regulators {
       dcdc1_reg: regulator@0 {
           regulator-name = "vdds_dpr";
           regulator-always-on;
       };

        dcdc2_reg: regulator@1 {
           /* VDD_MPU voltage limits 0.95V - 1.26V with +/-4% tolerance */
           regulator-name = "vdd_mpu";
           regulator-min-microvolt = <925000>;
           regulator-max-microvolt = <1351500>;
           regulator-boot-on;
           regulator-always-on;
       };

        dcdc3_reg: regulator@2 {
           /* VDD_CORE voltage limits 0.95V - 1.1V with +/-4% tolerance */
           regulator-name = "vdd_core";
           regulator-min-microvolt = <925000>;
           regulator-max-microvolt = <1150000>;
           regulator-boot-on;
           regulator-always-on;
       };

        ldo1_reg: regulator@3 {
           regulator-name = "vio,vrtc,vdds";
           regulator-always-on;
       };

        ldo2_reg: regulator@4 {
           regulator-name = "vdd_3v3aux";
           regulator-always-on;
       };

        ldo3_reg: regulator@5 {
           regulator-name = "vdd_1v8";
           regulator-always-on;
       };

        ldo4_reg: regulator@6 {
           regulator-name = "vdd_3v3a";
           regulator-always-on;
       };
   };
};

Im using kernel 4.19.79

On default Debian image:
- when i press power button then the system is power off and power LED is 
off
- when i run `poweroff` then system is going down and power led is OFF

On my buildroot image:
- when i press power button nothing happend
- when i run `poweroff` then system is going down and power led is still ON

How to enable full power support in buildroot image?

Regards,
Szymon
 

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