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## cs35l41_spi.md

      
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                lamperez
                / cs35l41_spi.md
            
            
              Last active
              July 15, 2024 23:41
            
              
                CS35L41 amplifiers in an ASUS Zenbook on linux
              
          
    Asus Zenbook UX3402 speakers on Linux

Important
THIS IS NOW OBSOLETE WITH KERNEL VERSIONS ≥ 6.7.0
A recent announcement in the kernel mail list by Cirrus developers will solve the problem described here. Therefore, the proposed solutions will be soon obsolete.
See this comment (thanks, @flukejones, for the tip).

I got the speakers working on my Asus Zenbook 14 OLED UX3402, the one with Intel CPU and the two CS35L41
audio amplifiers connected over SPI (not the UM3402YA, with AMD and I²C). The amplifiers are supported by the snd_hda_scodec_cs35l41 module in recent kernel versions, but they require some model-specific configuration paramaters, that should be provided by

  
## custom_acpi_tables.md

      
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                lamperez
                / custom_acpi_tables.md
            
            
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              July 11, 2024 22:35
            
              
                Load custom ACPI tables
              
          
    ACPI DSDT/SSDT patching

These instructions are meant for a system with EFI, systemd-boot and deb based packages. Adjust them to your needs.
Reference:
https://www.kernel.org/doc/Documentation/acpi/initrd_table_override.txt
See also
https://github.com/lbschenkel/acer-sf314_43-acpi-patch

  
## Bringup.md

      
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                mvaisakh
                / Bringup.md
            
            
              Last active
              July 9, 2024 08:03
            
              
                An Android Device Tree Bringup Guide
              
          
    A small Device Tree Bringup Guide

Introduction

So, you guys might be wondering, how do these "Developers" get your favourite Custom roms, such as LineageOS, Paranoid Android etc., to their own devices. Well I'm here to Guide you on how to do it, specifically on how to bringup or make your own device tree from scratch or adapting.
Gist of this Guide: This is for people with genuine interest in Android OS porting/development. After going through this guide, you should be able to do a total device tree bringup on your own.

Prerequisite: Certain requirements are to be met before you start with this amazing journey.