Apple Mailbox driver

modulename: apple-mailbox.ko

configname: CONFIG_APPLE_MAILBOX

Linux Kernel Configuration
└─>Device Drivers
└─>Mailbox Hardware Support
└─>Apple Mailbox driver
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
Apple SoCs have various co-processors required for certain
peripherals to work (NVMe, display controller, etc.). This
driver adds support for the mailbox controller used to
communicate with those.

Say Y here if you have a Apple SoC.

source code: