The article describes how to integrate 88W8997 PCIE to Linux 5.4.24_2.1.0 based on i.MX8MM-EVK platform, and how to solve issues encountered during the integration. [Contents] Chapter 1 Connections & environments Connections Environments Hardware devices Software M.2 NGFF KEY E interface on i.MX8MM-EVK Chapter 2 Preparation For Software        2.1 Cross Compile Toolchain        2.2 Demo Image for iMX8MM-EVK        2.3 L5.4.21_2.1.0 kernel source code        2.4 88W8997 PCIe Driver source code        2.5 uuu manufacturing Tool Chapter 3 Steps For Integration        2.1 Cross compiling L5.4.21_2.1.0 kernel source code Copying Image to Demo Image directory On windows 2.2 Cross compiling 88W8997 PCIe driver Copying mlan.ko & pcie8xxx.ko to windows directory Copying Firmware to windows to windows directory 2.3 Burning Linux Images to iMX8MM-EVK board        2.4 Copying .ko and firmware files to iMX8MM-EVK board via MobaXterm        2.5 Loading 88W8997 driver Chapter 4 Troubleshooting        4.1 PCIe card can’t be found via lspci command        4.2 Errors on MSI interrupt when using PCIe Switch AW-CM276MA (88W8997 Inside)