fates1.7-buttons-4encoders-overlay.dts

/*
Device Tree overlay for Fates Buttons and Encoders

Default pins (FATES v1.7):
Button 1 = 24
Button 2 = 25
Button 3 = 23

Knob 1 = 5, 6
Knob 2 = 13, 12
Knob 3 = 27, 22
Knob 4 = 26, 16
*/

/dts-v1/;
/plugin/;

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

    fragment@0 {
        target-path = "/soc/gpio";
        __overlay__ {
            knob_pins4: knob_pins4 {
                brcm,pins = <26 16>;
                brcm,function = <0>;
                brcm,pull = <2>;
            };
        };
    };

    fragment@1 {
        target-path = "/soc";
        __overlay__ {
            knob4: knob4 {
                compatible = "rotary-encoder";
                #address-cells = <1>;
                #size-cells = <0>;
                pinctrl-names = "default";
                pinctrl-0 = <&knob_pins4>;
                gpios = <&gpio 26 1>, <&gpio 16 1>;
                linux,axis = <0>; /* REL_X */
                rotary-encoder,relative-axis;
		            rotary-encoder,half-period;
            };
        };
    };
    //__overrides__ {
        //relative_axis =  <&knob>,"rotary-encoder,relative-axis";
        //linux_axis =  <&knob>,"linux,axis";
        //rollover =  <&knob>,"rotary-encoder,rollover";
        //half-period =  <&knob>,"rotary-encoder,half-period";
        //steps =  <&knob>,"rotary-encoder,steps";
    //};

    fragment@2 {
        target-path = "/soc/gpio";
        __overlay__ {
            knob_pins1: knob_pins1 {
                brcm,pins = <5 6>;
                brcm,function = <0>;
                brcm,pull = <2>;
            };
        };
    };

    fragment@3 {
        target-path = "/soc";
        __overlay__ {
            knob1: knob1 {
                compatible = "rotary-encoder";
                #address-cells = <1>;
                #size-cells = <0>;
                pinctrl-names = "default";
                pinctrl-0 = <&knob_pins1>;
                gpios = <&gpio 5 1>, <&gpio 6 1>;
                linux,axis = <0>; /* REL_X */
                rotary-encoder,relative-axis;
		            rotary-encoder,half-period;
            };
        };
    };
    //__overrides__ {
        //relative_axis =  <&knob>,"rotary-encoder,relative-axis";
        //linux_axis =  <&knob>,"linux,axis";
        //rollover =  <&knob>,"rotary-encoder,rollover";
        //half-period =  <&knob>,"rotary-encoder,half-period";
        //steps =  <&knob>,"rotary-encoder,steps";
    //};

    fragment@4 {
        target-path = "/soc/gpio";
        __overlay__ {
            knob_pins2: knob_pins2 {
                brcm,pins = <13 12>;
                brcm,function = <0>;
                brcm,pull = <2>;
            };
        };
    };

    fragment@5 {
        target-path = "/soc";
        __overlay__ {
            knob2: knob2 {
                compatible = "rotary-encoder";
                #address-cells = <1>;
                #size-cells = <0>;
                pinctrl-names = "default";
                pinctrl-0 = <&knob_pins2>;
                gpios = <&gpio 13 1>, <&gpio 12 1>;
                linux,axis = <0>; /* REL_X */
                rotary-encoder,relative-axis;
		rotary-encoder,half-period;
            };
        };
    };
    //__overrides__ {
        //relative_axis =  <&knob>,"rotary-encoder,relative-axis";
        //linux_axis =  <&knob>,"linux,axis";
        //rollover =  <&knob>,"rotary-encoder,rollover";
        //half-period =  <&knob>,"rotary-encoder,half-period";
        //steps =  <&knob>,"rotary-encoder,steps";
    //};

    fragment@6 {
        target-path = "/soc/gpio";
        __overlay__ {
            knob_pins3: knob_pins3 {
                brcm,pins = <27 22>;
                brcm,function = <0>;
                brcm,pull = <2>;
            };
        };
    };

    fragment@7 {
        target-path = "/soc";
        __overlay__ {
            knob0: knob3 {
                compatible = "rotary-encoder";
                #address-cells = <1>;
                #size-cells = <0>;
                pinctrl-names = "default";
                pinctrl-0 = <&knob_pins3>;
                gpios = <&gpio 27 1>, <&gpio 22 1>;
                linux,axis = <0>; /* REL_X */
                rotary-encoder,relative-axis;
		            rotary-encoder,half-period;
            };
        };
    };
    //__overrides__ {
        //relative_axis =  <&knob>,"rotary-encoder,relative-axis";
        //linux_axis =  <&knob>,"linux,axis";
        //rollover =  <&knob>,"rotary-encoder,rollover";
        //half-period =  <&knob>,"rotary-encoder,half-period";
        //steps =  <&knob>,"rotary-encoder,steps";
    //};

    fragment@8 {
       target-path = "/";
       __overlay__ {
          keypad: keys {
             compatible = "gpio-keys";
             #address-cells = <1>;
             #size-cells = <0>;
             button@24 {
                linux,code = <1>;
                gpios = <&gpio 24 1>;
             };
             button@25 {
                linux,code = <2>;
                gpios = <&gpio 25 1>;
             };
             button@23 {
                linux,code = <3>;
                gpios = <&gpio 23 1>;
             };
          };
       };
    };
};