Cyclone V SoC ALSA MUX

If this project is constructive, welcome to donate a drink to PayPal.

or

paypal.me/briansune

Introduction

This project aim to support split capture and playback devices when utilizing this ALSA driver.

This work opens a better flexibilities on the Codec devcies, the default driver can only support unified Codec.

With this work the I2S can be shared by Codecs w/o wasting FPGA fabric resources and HPS DMA channels.

This driver can also applied to other FPSoC.

Developers and Assistants

1. BrianSune

2. ChatGPT 5

3. ChatGPT 4

Device Tree Example

	sound {
		compatible = "briansune,i2s-mic-amp";
		cpu-dai = <&i2s>;
		playback-codec = <&max98357a>;
		capture-codec  = <&ics43432>;
	};

	ics43432: ics43432 {
		compatible = "invensense,ics43432";
		#sound-dai-cells = <0>;
	};

	max98357a: max98357a {
		compatible = "maxim,max98357a";
		#sound-dai-cells = <0>;
		sdmode-gpios = <&led_pio 0 GPIO_ACTIVE_HIGH>;
	};