L4Re Operating System Framework
Interface and Usage Documentation
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RTC driver

The RTC driver can drive various real-time clocks and provides an interface for other components, e.g., uvmm, to read and write the time.

It needs access to the hardware, depending on the clock, either via a vbus or via an I2C device.

Command Line Options

There are no command line options.

Environment

Several capabilities can be used to interact with the environment:

  • 'rtc' (server)

    The capability that can be used from the outside to read and write the time.

  • 'vbus'

    The vbus used to access hardware for port-based clock on X86 and pl031 on arm.

    The vbus is also needed for receiving the inhibitor signal from IO.