Brooklyn/arch/arm/boot/dts/overlays/draws-overlay.dts

#include <dt-bindings/clock/bcm2835.h>
/*
 * Device tree overlay for the DRAWS Hardware
 */

/dts-v1/;
/plugin/;

/ {
    compatible = "brcm,bcm2835";
    fragment@0 {
        target = <&i2s>;
        __overlay__ {
            status = "okay";
        };
    };

    fragment@1 {
        target-path = "/";
        __overlay__ {
            regulators {
                compatible = "simple-bus";
                #address-cells = <1>;
                #size-cells = <0>;

                udrc0_ldoin: udrc0_ldoin {
                    compatible = "regulator-fixed";
                    regulator-name = "ldoin";
                    regulator-min-microvolt = <3300000>;
                    regulator-max-microvolt = <3300000>;
                    regulator-always-on;
                };

                sc16is752_clk: sc16is752_draws_clk {
                    compatible = "fixed-clock";
                    #clock-cells = <0>;
                    clock-frequency = <1843200>;
                };
            };

            pps: pps {
                compatible = "pps-gpio";
                pinctrl-names = "default";
                pinctrl-0 = <&pps_pins>;
                gpios = <&gpio 7 0>;
                status = "okay";
            };

            iio-hwmon {
                compatible = "iio-hwmon";
                status = "okay";
                io-channels = <&tla2024 4>, <&tla2024 5>, <&tla2024 6>,
                              <&tla2024 7>;
            };
        };
    };

    fragment@2 {
        target = <&i2c_arm>;
        __overlay__ {
            #address-cells = <1>;
            #size-cells = <0>;
            status = "okay";

            tlv320aic32x4: tlv320aic32x4@18 {
                compatible = "ti,tlv320aic32x4";
                reg = <0x18>;
                #sound-dai-cells = <0>;
                status = "okay";

                clocks = <&clocks BCM2835_CLOCK_GP0>;
                clock-names = "mclk";
                assigned-clocks = <&clocks BCM2835_CLOCK_GP0>;
                assigned-clock-rates = <25000000>;

                pinctrl-names = "default";
                pinctrl-0 = <&gpclk0_pin &aic3204_reset>;

                reset-gpios = <&gpio 13 0>;

                iov-supply = <&udrc0_ldoin>;
                ldoin-supply = <&udrc0_ldoin>;
            };

            sc16is752: sc16is752@50 {
                compatible = "nxp,sc16is752";
                reg = <0x50>;
                clocks = <&sc16is752_clk>;
                interrupt-parent = <&gpio>;
                interrupts = <17 2>; /* IRQ_TYPE_EDGE_FALLING */

                pinctrl-names = "default";
                pinctrl-0 = <&sc16is752_irq>;
            };

            tla2024: tla2024@48 {
                compatible = "ti,ads1015";
                reg = <0x48>;
                #address-cells = <1>;
                #size-cells = <0>;
                #io-channel-cells = <1>;

                adc_ch4: channel@4 {
                    reg = <4>;
                    ti,gain = <1>;
                    ti,datarate = <4>;
                };

                adc_ch5: channel@5 {
                    reg = <5>;
                    ti,gain = <1>;
                    ti,datarate = <4>;
                };

                adc_ch6: channel@6 {
                    reg = <6>;
                    ti,gain = <2>;
                    ti,datarate = <4>;
                };

                adc_ch7: channel@7 {
                    reg = <7>;
                    ti,gain = <2>;
                    ti,datarate = <4>;
                };
            };
        };
    };

    fragment@3 {
        target = <&sound>;
        snd: __overlay__ {
            compatible = "simple-audio-card";
            i2s-controller = <&i2s>;
            status = "okay";

            simple-audio-card,name = "draws";
            simple-audio-card,format = "i2s";

            simple-audio-card,bitclock-master = <&dailink0_master>;
            simple-audio-card,frame-master = <&dailink0_master>;

            simple-audio-card,widgets =
                "Line", "Line In",
                "Line", "Line Out";

            simple-audio-card,routing =
                "IN1_R", "Line In",
                "IN1_L", "Line In",
                "CM_L", "Line In",
                "CM_R", "Line In",
                "Line Out", "LOR",
                "Line Out", "LOL";

            dailink0_master: simple-audio-card,cpu {
                sound-dai = <&i2s>;
            };

            simple-audio-card,codec {
                sound-dai = <&tlv320aic32x4>;
            };
        };
    };

    fragment@4 {
        target = <&gpio>;
        __overlay__ {
            gpclk0_pin: gpclk0_pin {
                brcm,pins = <4>;
                brcm,function = <4>;
            };

            aic3204_reset: aic3204_reset {
                brcm,pins = <13>;
                brcm,function = <1>;
                brcm,pull = <1>;
            };

            aic3204_gpio: aic3204_gpio {
                brcm,pins = <26>;
            };

            sc16is752_irq: sc16is752_irq {
                brcm,pins = <17>;
                brcm,function = <0>;
                brcm,pull = <2>;
            };

            pps_pins: pps_pins {
                brcm,pins = <7>;
                brcm,function = <0>;
                brcm,pull = <0>;
            };
        };
    };

    __overrides__ {
        draws_adc_ch4_gain = <&adc_ch4>,"ti,gain:0";
        draws_adc_ch4_datarate = <&adc_ch4>,"ti,datarate:0";
        draws_adc_ch5_gain = <&adc_ch5>,"ti,gain:0";
        draws_adc_ch5_datarate = <&adc_ch5>,"ti,datarate:0";
        draws_adc_ch6_gain = <&adc_ch6>,"ti,gain:0";
        draws_adc_ch6_datarate = <&adc_ch6>,"ti,datarate:0";
        draws_adc_ch7_gain = <&adc_ch7>,"ti,gain:0";
        draws_adc_ch7_datarate = <&adc_ch7>,"ti,datarate:0";
        alsaname = <&snd>, "simple-audio-card,name";
    };
};