Title: The Unseen Architect: Understanding the Role and Function of the SA9123L Driver

Conclusion

Windows 10/11: Generally "driveless" (plug-and-play) as it is automatically recognized by the system using native USB Audio Class 2.0 drivers.

• Use regmap_i2c for I2C: regmap = devm_regmap_init_i2c(client, ®map_config);
• Implement .hw_params to set sample rate/format by writing registers.
• Implement DAI ops: startup, shutdown, trigger, set_sysclk.

Windows 7: Requires manual driver installation to support high-speed audio streaming.