Specialized Device Drivers

All device drivers that are accessible to application logic are either: (1) Character device drivers that can be accessed via the standard driver operations (open(), close(), read(), write(), etc.), or (2) block drivers that can be accessing only as part of mounting a file system or other special use cases as described in the preceding paragraph.

In addition to this, there are also specialized “drivers” that can be used only within the OS logic itself and are not accessible to application logic. These specialized drivers are discussed in the following section.

Note

While special drivers are internal, in some cases there are also character/block drivers that sit on top of these special drivers and thus expose them to applications.

Supported Drivers

• SYSLOG
  • SYSLOG Interfaces
    • Standard SYSLOG Interfaces
    • Debug Interfaces
  • SYSLOG Channels
    • SYSLOG Channel Interfaces
    • SYSLOG Channel Initialization
    • Interrupt Level SYSLOG Output
  • SYSLOG Channel Options
    • SYSLOG Console Device
    • SYSLOG Character Device
    • SYSLOG File Device
    • SYSLOG RAMLOG Device
  • RAM Logging Device
    • dmesg command
    • RAMLOG Configuration options
• SPI Device Drivers
• I2C Device Drivers
• Ethernet Device Drivers
• SocketCAN Device Drivers
• Frame Buffer Drivers
• LCD Drivers
• Memory Technology Device Drivers
• SDIO Device Drivers
• USB Host-Side Drivers
• USB Device-Side Drivers