miscellaneous.rst 1.3 KB

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  1. Parallel Port Devices
  2. =====================
  3. .. kernel-doc:: include/linux/parport.h
  4. :internal:
  5. .. kernel-doc:: drivers/parport/ieee1284.c
  6. :export:
  7. .. kernel-doc:: drivers/parport/share.c
  8. :export:
  9. .. kernel-doc:: drivers/parport/daisy.c
  10. :internal:
  11. 16x50 UART Driver
  12. =================
  13. .. kernel-doc:: drivers/tty/serial/8250/8250_core.c
  14. :export:
  15. See serial/driver.rst for related APIs.
  16. Pulse-Width Modulation (PWM)
  17. ============================
  18. Pulse-width modulation is a modulation technique primarily used to
  19. control power supplied to electrical devices.
  20. The PWM framework provides an abstraction for providers and consumers of
  21. PWM signals. A controller that provides one or more PWM signals is
  22. registered as :c:type:`struct pwm_chip <pwm_chip>`. Providers
  23. are expected to embed this structure in a driver-specific structure.
  24. This structure contains fields that describe a particular chip.
  25. A chip exposes one or more PWM signal sources, each of which exposed as
  26. a :c:type:`struct pwm_device <pwm_device>`. Operations can be
  27. performed on PWM devices to control the period, duty cycle, polarity and
  28. active state of the signal.
  29. Note that PWM devices are exclusive resources: they can always only be
  30. used by one consumer at a time.
  31. .. kernel-doc:: include/linux/pwm.h
  32. :internal:
  33. .. kernel-doc:: drivers/pwm/core.c
  34. :export: