Kconfig 2.3 KB

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  1. config DM_PWM
  2. bool "Enable support for pulse-width modulation devices (PWM)"
  3. depends on DM
  4. help
  5. A pulse-width modulator emits a pulse of varying width and provides
  6. control over the duty cycle (high and low time) of the signal. This
  7. is often used to control a voltage level. The more time the PWM
  8. spends in the 'high' state, the higher the voltage. The PWM's
  9. frequency/period can be controlled along with the proportion of that
  10. time that the signal is high.
  11. config PWM_EXYNOS
  12. bool "Enable support for the Exynos PWM"
  13. depends on DM_PWM
  14. help
  15. This PWM is found on Samsung Exynos 5250 and other Samsung SoCs. It
  16. supports a programmable period and duty cycle. A 32-bit counter is
  17. used. It provides 5 channels which can be independently
  18. programmed. Channel 4 (the last) is normally used as a timer.
  19. config PWM_IMX
  20. bool "Enable support for i.MX27 and later PWM"
  21. help
  22. This PWM is found i.MX27 and later i.MX SoCs.
  23. config PWM_MTK
  24. bool "Enable support for MediaTek PWM"
  25. depends on DM_PWM
  26. help
  27. This PWM is found on MT7622, MT7623, and MT7629. It supports a
  28. programmable period and duty cycle.
  29. config PWM_ROCKCHIP
  30. bool "Enable support for the Rockchip PWM"
  31. depends on DM_PWM
  32. help
  33. This PWM is found on RK3288 and other Rockchip SoCs. It supports a
  34. programmable period and duty cycle. A 32-bit counter is used.
  35. Various options provided in the hardware (such as capture mode and
  36. continuous/single-shot) are not supported by the driver.
  37. config PWM_SANDBOX
  38. bool "Enable support for the sandbox PWM"
  39. help
  40. This is a sandbox PWM used for testing. It provides 3 channels and
  41. records the settings passed into it, but otherwise does nothing
  42. useful. The PWM can be enabled but is not connected to any outputs
  43. so this is not very useful.
  44. config PWM_TEGRA
  45. bool "Enable support for the Tegra PWM"
  46. depends on DM_PWM
  47. help
  48. This PWM is found on Tegra 20 and other Nvidia SoCs. It supports
  49. four channels with a programmable period and duty cycle. Only a
  50. 32KHz clock is supported by the driver but the duty cycle is
  51. configurable.
  52. config PWM_SUNXI
  53. bool "Enable support for the Allwinner Sunxi PWM"
  54. depends on DM_PWM
  55. help
  56. This PWM is found on H3, A64 and other Allwinner SoCs. It supports a
  57. programmable period and duty cycle. A 16-bit counter is used.