Paper Details

Linux Operating System (OS) has a kernel source which provides resources to hardware andsoftware. In order to access hardware resources, drivers for the particular hardware must be developed and getregistered with kernel of the particular OS. Device driver take on a special role in Linux kernel. They are distinct “blackboxes” that make a particular piece of hardware respond to a well-defined internal programming interface; they hidecompletely the details of how the device works. User activities are performed by means of a set of standardized calls thatare independent of the specific driver; mapping those calls to device-specific operations that act on real hardware is thenthe role of the device driver. Each driver gets registered with the kernel using major and minor number.Linux Device Drivers are developed particularly for LCD, Touch screen, Camera, and NFC (PN512). All thefour drivers are using different interface in order to communicate with the processor. LCD is interfaced with MIPI,Touch screen uses I2C, Camera driver communicate with the processor using CSI interface and NFC (PN512) isinterfaced with UART to the processor.

Kapil Kumar, Shoukath Cherukat, “LINUX DEVICE DRIVER DEVELOPMENT ON ARM CORTEX A9 BASED EMBEDDED SYSTEM”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 3, Issue 10, pp. 97-104, October 2016.