ugreen-dab-board-overlay.dts

/*
* Definitions for uGreen DAB Board
*/
/dts-v1/;
/plugin/;

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

	fragment@0 {
		target = <&spidev0>;
		__overlay__ {
			status = "disabled";
		};
	};

	fragment@1 {
		target = <&i2s>;
		__overlay__ {
			status = "okay"; /* device is enabled */
		};
	};

	fragment@2 {
		target = <&gpio>;
		__overlay__ {
			status = "okay"; /* device is enabled */
			si468x_pins: si468x_pins {
				brcm,pins = <23>; /* gpio no. */
				brcm,function = <1>; /* 0:in, 1:out */
				brcm,pull = <0>; /* 2:up 1:down 0:none */
			};
		};
	};

	fragment@3 {
		target = <&spi0>;
		__overlay__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay"; /* device is enabled */
			si4684: si4684@0 {
				#sound-dai-cells = <0>;
				compatible = "si,si4684";
				reg = <0>;
				spi-max-frequency = <2000000>;
				pinctrl-names = "default";
				pinctrl-0 = <&si468x_pins>;
				reset-gpios = <&gpio 23 1>; /* GPIO_ACTIVE_LOW for si468x*/
				interrupt-parent = <&gpio>;
				interrupts = <25 2>; /* falling edge */
				vcore-supply = <&vdd_3v3_reg>;
				vmem-supply = <&vdd_3v3_reg>;
				va-supply = <&vdd_3v3_reg>;
				vio-supply = <&vdd_3v3_reg>;
				clock-mode = <1>; /* SI468X_XMODE_CRYSTAL */
				clocks = <&si4688_osc>;
				clock-ibias = <70>; /* for 5*70Ohm -> 700uA */
				clock-ctun = <31>;
				fm_tune_fe_varm = /bits/ 16 <0x8600>;
				fm_tune_fe_varb = /bits/ 16 <0x00c9>;
				fm_tune_fe_cfg = /bits/ 16 <1>;
				dab_tune_fe_varm = /bits/ 16 <0xfe3e>;
				dab_tune_fe_varb = /bits/ 16 <0x005e>;
				dab_tune_fe_cfg = /bits/ 16 <0>;
				firmware-am = "si468x/amhd_radio_3_0_6.bif";
				firmware-fm = "si468x/fmhd_radio_5_1_0.bin";
				firmware-dab = "si468x/dab_radio_5_0_8.bin";
				firmware-mini = "si468x/rom00_patch_mini.bin";
				firmware-patch = "si468x/rom00_patch.016.bin";
				flash-am = <0x0011E000>;
				flash-fm = <0x00006000>;
				flash-dab = <0x00092000>;
				flash-mini = <0x00002000>;
				flash-patch = <0x00004000>;
				status = "okay"; /* device is enabled */
			};
		};
	};

	fragment@4 {
		target = <&sound>;
		__overlay__ {
			compatible = "simple-audio-card";
			simple-audio-card,name = "DAB-Board";
			simple-audio-card,widgets = "Line", "In Tuner";
			simple-audio-card,routing = "In Tuner", "ROUT",
						    "In Tuner", "LOUT";
			status = "okay"; /* device is enabled */
			simple-audio-card,dai-link@0 { /* I2S -> si4684 */
				format = "i2s";
				cpu {
					sound-dai = <&i2s 0>;
				};
				codec {
					sound-dai = <&si4684 0>;
				};
			};
		};
	};

	fragment@5 {
		target-path = "/";
		__overlay__ {
			si4688_osc: si4688_osc {
				compatible = "fixed-clock";
				#clock-cells = <0>;
				clock-frequency  = <19200000>;
			};
		};
	};
};