Atmel WILC1000 SDIO (WiFi only)

modulename: wilc1000-sdio.ko

configname: CONFIG_WILC1000_SDIO

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>MMC/SD/SDIO card support
└─>Atmel WILC1000 SDIO (WiFi only)
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This module adds support for the SDIO interface of adapters using
WILC1000 chipset. The Atmel WILC1000 SDIO is a full speed interface.
It meets SDIO card specification version 2.0. The interface supports
the 1-bit/4-bit SD transfer mode at the clock range of 0-50 MHz.
The host can use this interface to read and write from any register
within the chip as well as configure the WILC1000 for data DMA.
To use this interface, pin9 (SDIO_SPI_CFG) must be grounded. Select
this if your platform is using the SDIO bus.

source code: