i.MX MU used as MSI controller

modulename: irq-imx-mu-msi.ko

configname: CONFIG_IMX_MU_MSI

Linux Kernel Configuration
└─>Device Drivers
└─>IRQ chip support
└─>Device Tree and Open Firmware support
└─>i.MX MU used as MSI controller
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
Provide a driver for the i.MX Messaging Unit block used as a
CPU-to-CPU MSI controller. This requires a specially crafted DT
to make use of this driver.

If unsure, say N

source code:
selects
CONFIG_IRQ_DOMAIN
CONFIG_IRQ_DOMAIN_HIERARCHY
CONFIG_GENERIC_MSI_IRQ
CONFIG_IRQ_MSI_LIB

depends
CONFIG_HAS_IOMEM
CONFIG_OF
CONFIG_ARCH_MXC or CONFIG_COMPILE_TEST