Nvidia Tegra20 Serial flash Controller

modulename: spi-tegra20-sflash.ko

configname: CONFIG_SPI_TEGRA20_SFLASH

Linux Kernel Configuration
└─>Device Drivers
└─>SPI support
└─>Nvidia Tegra20 Serial flash Controller
In linux kernel since version 3.1 (release Date: 2011-10-24)  
SPI driver for Nvidia Tegra20 Serial flash Controller interface.
The main usecase of this controller is to use spi flash as boot
device.

source code:
drivers/spi/spi-tegra20-sflash.c