Lines Matching refs:clock

2 * PTP hardware clock infrastructure for Linux
10   A new class driver exports a kernel interface for specific clock
12   complete set of PTP hardware clock functionality.
14   + Basic clock operations
17     - Shift the clock by a given offset atomically
18     - Adjust clock frequency
20   + Ancillary clock features
26 ** PTP hardware clock kernel API
28    A PTP clock driver registers itself with the class driver. The
30    author of a clock driver need only implement the details of
31    programming the clock hardware. The clock driver notifies the class
35    The class driver supports multiple PTP clock drivers. In normal use
36    cases, only one PTP clock is needed. However, for testing and
37    development, it can be useful to have more than one clock in a
40 ** PTP hardware clock user space API
43    registered clock. User space can use an open file descriptor from
44    the character device as a POSIX clock id and may call
46    implement the basic clock operations.
48    User space programs may control the clock using standardized
50    ancillary clock features. User space can receive time stamped
55 ** Writing clock drivers
60    functions in the interface. If a clock does not offer a particular
69    class driver, since the lock may also be needed by the clock
81      - 6 GPIOs with dedicated functions (LED/JTAG/clock) can also be