Cadence XSPI controller

modulename: spi-cadence-xspi.ko

configname: CONFIG_SPI_CADENCE_XSPI

Linux Kernel Configuration
└─>Device Drivers
└─>SPI support
└─>Device Tree and Open Firmware support
└─>Cadence XSPI controller
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
Enable support for the Cadence XSPI Flash controller.

Cadence XSPI is a specialized controller for connecting an SPI
Flash over upto 8bit wide bus. Enable this option if you have a
device with a Cadence XSPI controller and want to access the
Flash as an MTD device.

source code:
drivers/spi/spi-cadence-xspi.c