Pillgram::Audio

TLV320AIC3110

Schematics

Device Tree

/dts-v1/;
/plugin/; 
 
/ { 
    compatible = "brcm,bcm2712", "brcm,bcm2711", "brcm,bcm2835";
 
    fragment@0 {
        target = <&i2s>;  // For RPi4
        __overlay__ {
            status = "okay";
            #sound-dai-cells = <0>;
            brcm,tx-channels = <2>;
            brcm,rx-channels = <2>;
        };
    };
 
    fragment@2 {
            target-path = "/";
            __overlay__ {
                    codec_1v8_reg: codec-1v8-reg {
                        compatible = "regulator-fixed";
                        regulator-name = "tlv320aic3104_1v8";
                        regulator-min-microvolt = <1800000>;
                        regulator-max-microvolt = <1800000>;
                        regulator-always-on;
                    };
            };
    };
  
    fragment@3 {
        target = <&i2c1>;
        __overlay__ {
            #address-cells = <1>; /* Single cell for I2C address */
            #size-cells = <0>;    /* No size cells for I2C devices */
            status = "okay";
 
            tlv320aic3110: tlv320aic3110@18 {
                compatible = "ti,tlv320aic3110", "ti,tlv320aic311x"; 
                reg = <0x18>;
                #sound-dai-cells = <0>;
                // system-clock-frequency = <12288000>;  // Codec clock config
                // system-clock-direction-out;           // Codec as master
                status = "okay";
 
                HPVDD-supply = <&vdd_3v3_reg>;
                SPRVDD-supply = <&vdd_5v0_reg>;
                SPLVDD-supply = <&vdd_5v0_reg>;
                AVDD-supply = <&vdd_3v3_reg>;
                IOVDD-supply = <&vdd_3v3_reg>;
                DVDD-supply = <&codec_1v8_reg>;
 
                clocks = <&mclk_external>;
                clock-names = "mclk";
                // system-clk-frequency = <12288000>;
                mclk-frequency = <12288000>;
                // gpio-controller;
 
                /* PLL configuration for 48kHz with 12.288MHz MCLK */
                pll-p = <1>;
                pll-r = <1>;
                pll-j = <7>;
                pll-d = <1680>;
 
                reset-gpios = <&gpio 13 0>; // GPIO 13 as active high 
                reset-delay-us = <10000>;     /* 10ms delay */
 
                // Debug properties
                debug;
                linux,debug;
            };
        };
    };
 
    fragment@5 {
        target = <&sound>;
        __overlay__ {
            compatible = "simple-audio-card";
            simple-audio-card,name = "TLV320AIC3110";
            simple-audio-card,format = "i2s";
            // simple-audio-card,bitclock-master = <&dailink0_master>;
            // simple-audio-card,frame-master = <&dailink0_master>;
 
            simple-audio-card,widgets =
                "Microphone", "Mic Jack",
                "Speaker", "Speaker Left",
                "Speaker", "Speaker Right";
            simple-audio-card,routing =
                "Speaker Left", "SPL",
                "Speaker Right", "SPR",
                "MIC1LP", "Mic Jack",
                "MIC1LM", "Mic Jack";
            status = "okay";
 
            simple-audio-card,cpu {
                sound-dai = <&i2s>;
            };
 
            dailink0_master: simple-audio-card,codec {
                sound-dai = <&tlv320aic3110>;
                clocks = <&mclk_external>;
                system-clock-frequency = <12288000>; //*** added LAX
                mclk-fs = <256>; //*** added LAX
            };
        };
    };
 
    fragment@6 {
        target-path = "/";
        __overlay__ {
            mclk_external: mclk_external {
                compatible = "fixed-clock";
                #clock-cells = <0>;
                clock-frequency = <12288000>; // 12.288 MHz
                clock-output-names = "mclk";
            };
        };
    };
};