norns-buttons-encoders-overlay.dts

/dts-v1/;
/plugin/;

/ {
    compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";

    fragment@0 {
        target-path = "/soc/gpio";
        __overlay__ {
            knob_pins1: knob_pins1 {
                brcm,pins = <28 29>;
                brcm,function = <0>;
                brcm,pull = <2>;
            };
        };
    };

    fragment@1 {
        target-path = "/soc";
        __overlay__ {
            knob1: knob1 {
                compatible = "rotary-encoder";
                #address-cells = <1>;
                #size-cells = <0>;
                pinctrl-names = "default";
                pinctrl-0 = <&knob_pins1>;
                gpios = <&gpio 28 1>, <&gpio 29 1>;
                linux,axis = <0>; /* REL_X */
                rotary-encoder,relative-axis;
		            rotary-encoder,half-period;
            };
        };
    };

    fragment@2 {
        target-path = "/soc/gpio";
        __overlay__ {
            knob_pins2: knob_pins2 {
                brcm,pins = <32 33>;
                brcm,function = <0>;
                brcm,pull = <2>;
            };
        };
    };

    fragment@3 {
        target-path = "/soc";
        __overlay__ {
            knob2: knob2 {
                compatible = "rotary-encoder";
                #address-cells = <1>;
                #size-cells = <0>;
                pinctrl-names = "default";
                pinctrl-0 = <&knob_pins2>;
                gpios = <&gpio 32 1>, <&gpio 33 1>;
                linux,axis = <0>; /* REL_X */
                rotary-encoder,relative-axis;
		rotary-encoder,half-period;
            };
        };
    };

    fragment@4 {
        target-path = "/soc/gpio";
        __overlay__ {
            knob_pins3: knob_pins3 {
                brcm,pins = <36 37>;
                brcm,function = <0>;
                brcm,pull = <2>;
            };
        };
    };

    fragment@5 {
        target-path = "/soc";
        __overlay__ {
            knob3: knob3 {
                compatible = "rotary-encoder";
                #address-cells = <1>;
                #size-cells = <0>;
                pinctrl-names = "default";
                pinctrl-0 = <&knob_pins3>;
                gpios = <&gpio 36 1>, <&gpio 37 1>;
                linux,axis = <0>; /* REL_X */
                rotary-encoder,relative-axis;
		            rotary-encoder,half-period;
            };
        };
    };

    fragment@6 {
       target-path = "/";
       __overlay__ {
          keypad: keys {
             compatible = "gpio-keys";
             #address-cells = <1>;
             #size-cells = <0>;
             button1: button1 {
                linux,code = <1>;
                gpios = <&gpio 31 1>;
             };
             button2: button2 {
                linux,code = <2>;
                gpios = <&gpio 35 1>;
             };
             button3: button3 {
                linux,code = <3>;
                gpios = <&gpio 39 1>;
             };
          };
       };
    };

    __overrides__ {
        e1_pin_a = <&knob_pins1>,"brcm,pins:0",
                   <&knob1>,"gpios:4";
        e1_pin_b = <&knob_pins1>,"brcm,pins:4",
                   <&knob1>,"gpios:16";
        e2_pin_a = <&knob_pins2>,"brcm,pins:0",
                   <&knob2>,"gpios:4";
        e2_pin_b = <&knob_pins2>,"brcm,pins:4",
                   <&knob2>,"gpios:16";
        e3_pin_a = <&knob_pins3>,"brcm,pins:0",
                   <&knob3>,"gpios:4";
        e3_pin_b = <&knob_pins3>,"brcm,pins:4",
                   <&knob3>,"gpios:16";
        b1_pin = <&button1>,"gpios:4";
        b2_pin = <&button2>,"gpios:4";
        b3_pin = <&button3>,"gpios:4";
    };
};