mt7628an_linkplay_a31.dts

#include "mt7628an.dtsi"

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>

/ {
	/*
	 * (C) 2024 Hajo Noerenberg
	 * 
	 * https://github.com/hn/linkplay-a31
	 * http://www.noerenberg.de/
	 *
	 */

	compatible = "linkplay,a31", "mediatek,mt7628an-soc";
	model = "Linkplay A31";

	chosen {
		bootargs = "console=ttyS1,57600";
	};

	aliases {
		serial0 = &uart1;
		serial1 = &uartlite;
	};

	/*
	 * This configures the A31 as an I2S slave using a generic S/PDIF transmitter.
	 * For I2S master configuration, you'll need to add a real codec and
	 * extend the settings below (see A31 manual section 2.3).
	 */

	sound {
		compatible = "simple-audio-card";
		simple-audio-card,name = "Audio-I2S";
		simple-audio-card,format = "i2s";
		simple-audio-card,bitclock-master = <&dailink0_master>;
		simple-audio-card,frame-master = <&dailink0_master>;

		simple-audio-card,cpu {
			sound-dai = <&i2s>;
			// dai-tdm-slot-num = <2>;
			// dai-tdm-slot-width = <32>;
		};

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

	codec_spdif_out: spdif-transmitter {
		#address-cells = <0>;
		#size-cells = <0>;
		#sound-dai-cells = <0>;
		compatible = "linux,spdif-dit";
		status = "okay";
	};

};

&state_default {

	/* PCB GPIOs 1-5 are wired to MCU pins 14-18 => Linux 494-498 */

	pwm0 {
		groups = "pwm0";
		function = "gpio";
	};

	spis {
		groups = "spis";
		function = "gpio";
	};

};

&spi0 {
	status = "okay";

	pinctrl-names = "default";
	pinctrl-0 = <&spi_pins>, <&spi_cs1_pins>;

	flash@0 {
		compatible = "jedec,spi-nor";
		reg = <0>;
		spi-max-frequency = <40000000>;

		partitions {
			compatible = "fixed-partitions";
			#address-cells = <1>;
			#size-cells = <1>;

			partition@0 {
				label = "u-boot";
				reg = <0x0 0x30000>;
				read-only;
			};

			partition@30000 {
				label = "u-boot-env";
				reg = <0x30000 0x10000>;
			};

			factory: partition@40000 {
				label = "factory";
				reg = <0x40000 0x10000>;
				read-only;
			};

			partition@50000 {
				label = "bkKernel";
				reg = <0x50000 0x200000>;
				read-only;
			};

			/*
			 * Original firmware has a 'firmware' partition with
			 * size 0x730000 at 0x250000, a jffs2 'user' partitition
			 * with size 0x80000 at 0x980000 and a jffs2 'user2'
			 * partition with size 0x600000 at 0xa00000.
			 * Dropping both user partitions in favour of a
			 * bigger 'firmware' partition.
			 */

			partition@250000 {
				compatible = "denx,uimage";
				label = "firmware";
				reg = <0x250000 0xdb0000>;
			};
		};
	};

	spidev@1 {
		#address-cells = <1>;
		#size-cells = <1>;
		compatible = "linux,spidev";
		reg = <1>;
		spi-max-frequency = <40000000>;
	};
};

&i2s {
	#sound-dai-cells = <0>;
	status = "okay";
	pinctrl-names = "default";
	pinctrl-0 = <&i2s_pins>, <&refclk_pins>;
};

&i2c {
	status = "okay";
};

&gdma {
	status = "okay";
};

&uart1 {
	status = "okay";
};

&pwm {
	status = "okay";
};

&ethernet {
	nvmem-cells = <&macaddr_factory_2e>;
	nvmem-cell-names = "mac-address";
};

&wmac {
	status = "okay";

	mediatek,mtd-eeprom = <&factory 0x0>;
};

&factory {
	compatible = "nvmem-cells";
	#address-cells = <1>;
	#size-cells = <1>;

	macaddr_factory_2e: macaddr@2e {
		reg = <0x2e 0x6>;
	};
};