Open Kernel Configuration Window and select "Device Drivers" item. Press "enter" to come in next layer window, then user can enable the wanted drivers. Figure 5 shows the Kernel Configuration Window with Device Drivers item.

Figure 5. Device Drivers item.

4.1 General purpose IO (GPIO)

• The Linux configuration option for GPIO can be found in the following path.

4.2 Input Capture Module (ICM)

• The Linux configuration option for ICM can be found in the following path.

4.3 SPI

• The Linux configuration option for SPI can be found in the following path.

4.4 SPI NOR FLASH

• The Linux configuration option for SPI NOR FLASH can be found in the following path.

4.5 SPI NAND FLASH

• The Linux configuration option for SPI NAND FLASH can be found in the following path.

UART

• The Linux configuration option for UART can be found in the following path.

Device Drivers 
<*> Character device 
<*> Serial drivers 
<*> Sunplus UART serial port support

I2C

• The Linux configuration option for I2C can be found in the following path.

Device Drivers 
<*> I2C support 
<*> I2C device interface
I2C Hardware Bus support 
<*> SP I2C support

SD CARD

• The Linux configuration option for SD CARD can be found in the following path.

Device Drivers 
<*> MMC/SD/SDIO card support 
<*> Sunplus Gemini SoC SD Host Controller support

USB

• The Linux configuration option for USB can be found in the following path.

Device Drivers 
<*> USB support 
<*> EHCI HCD (USB 2.0) support
<*> OHCI HCD (USB 1.1) support
<*> USB Gadget Support 
<*> USB Peripheral Controller 
<*> Sunplus Gemini USB Device Controller

ETHERNET SWITCH

• The Linux configuration option for ETHERNET SWITCH can be found in the following path.

Device Drivers 
<*> Network device support 
<*> Ethernet driver support 
<*> Sunplus devices

• Mode select at

Device Drivers 
<*> Network device support 
<*> Ethernet driver support 
<*> Sunplus devices
Selected Mode(Dual NIC Mode) 
( ) An NIC with Daisy-Chain Mode
Dual NIC Mode
( ) An NIC with Daisy-Chain Mode2

AUDIO

• The Linux configuration option for AUDIO can be found in the following path.

Device Drivers 
<*> Sound card support 
<*> Advanced Linux Sound Architecture 
<*> ALSA for SoC audio support 
<*> ASoc support for Sunplus

MIPICSI

• The Linux configuration option for MIPICSI can be found in the following path.

Device Drivers 
<*> Multimedia support 
<*> Sunplus MIPI/CSI-RX Driver

• If input device is communication by I2C interface (Example: OV9281), user must enable I2C driver also.

Device Drivers 
<*> I2C support 
<*> I2C device interface
I2C Hardware Bus support 
<*> SP I2C support

• To enable image sensor driver (Example: OV9281), please select driver as below.

Device Drivers 
<*> Multimedia support 
<*> Sunplus Video Sensor Support 
<*> Video Sensor (OV9281) Driver

HDMITX

• The Linux configuration option for HDMITX can be found in the following path.

Device Drivers 
<*> Multimedia support 
<*> V4L platform devices 
<*> SUNPLUS HDMITX driver

DISPLAY

• The Linux configuration option for DISPLAY can be found in the following path.

Device Drivers 
<*> Multimedia support 
<*> V4L platform devices 
<*> SUNPLUS DISPLAY driver

FRAMEBUFFER

• The Linux configuration option for FRAMEBUFFER can be found in the following path.

Device Drivers 
<*> Graphic support 
<*> Frame buffer Devices 
<*> SP7021Graphics Backend framebuffer support

MAILBOX

• The Linux configuration option for MAILBOX can be found in the following path.

Device Drivers 
<*> Misc devices 
<*> Sunplus Mailbox(IPC) driver

IOP (8051)

• The Linux configuration option for IOP (8051) can be found in the following path.

Device Drivers 
<*> Misc devices 
<*> IOP support 
<*> IOP support

CRYPTO ENGINE

• The Linux configuration option for CRYPTO ENGINE can be found in the following path.

Cryptographic API 
<*> Hardware crypto devices 
<*> Sunplus Crypto Engine