LXR uboot/drivers/pwm/Kconfig

   1config 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
  12config PWM_AT91
  13        bool "Enable support for PWM found on AT91 SoC's"
  14        depends on DM_PWM && ARCH_AT91
  15        help
  16          Support for PWM hardware on AT91 based SoC.
  17
  18config PWM_CROS_EC
  19        bool "Enable support for the Chrome OS EC PWM"
  20        depends on DM_PWM
  21        help
  22          This PWM is found on several Chrome OS devices and controlled by
  23          the Chrome OS embedded controller. It may be used to control the
  24          screen brightness and/or the keyboard backlight depending on the
  25          device.
  26
  27config PWM_EXYNOS
  28        bool "Enable support for the Exynos PWM"
  29        depends on DM_PWM
  30        help
  31          This PWM is found on Samsung Exynos 5250 and other Samsung SoCs. It
  32          supports a programmable period and duty cycle. A 32-bit counter is
  33          used. It provides 5 channels which can be independently
  34          programmed. Channel 4 (the last) is normally used as a timer.
  35
  36config PWM_IMX
  37        bool "Enable support for i.MX27 and later PWM"
  38        help
  39          This PWM is found i.MX27 and later i.MX SoCs.
  40
  41config PWM_MESON
  42        bool "Enable support for Amlogic Meson SoCs PWM"
  43        depends on DM_PWM
  44        help
  45          This PWM is found on Amlogic Meson SoCs. It supports a
  46          programmable period and duty cycle for 2 independant channels.
  47
  48config PWM_MTK
  49        bool "Enable support for MediaTek PWM"
  50        depends on DM_PWM
  51        help
  52          This PWM is found on MT7622, MT7623, and MT7629. It supports a
  53          programmable period and duty cycle.
  54
  55config PWM_ROCKCHIP
  56        bool "Enable support for the Rockchip PWM"
  57        depends on DM_PWM
  58        help
  59          This PWM is found on RK3288 and other Rockchip SoCs. It supports a
  60          programmable period and duty cycle. A 32-bit counter is used.
  61          Various options provided in the hardware (such as capture mode and
  62          continuous/single-shot) are not supported by the driver.
  63
  64config PWM_SANDBOX
  65        bool "Enable support for the sandbox PWM"
  66        help
  67          This is a sandbox PWM used for testing. It provides 3 channels and
  68          records the settings passed into it, but otherwise does nothing
  69          useful. The PWM can be enabled but is not connected to any outputs
  70          so this is not very useful.
  71
  72config PWM_SIFIVE
  73        bool "Enable support for SiFive PWM"
  74        depends on DM_PWM
  75        help
  76          This PWM is found SiFive's FU540 and other SoCs.
  77
  78config PWM_TEGRA
  79        bool "Enable support for the Tegra PWM"
  80        depends on DM_PWM
  81        help
  82          This PWM is found on Tegra 20 and other Nvidia SoCs. It supports
  83          four channels with a programmable period and duty cycle. Only a
  84          32KHz clock is supported by the driver but the duty cycle is
  85          configurable.
  86
  87config PWM_SUNXI
  88        bool "Enable support for the Allwinner Sunxi PWM"
  89        depends on DM_PWM
  90        help
  91          This PWM is found on H3, A64 and other Allwinner SoCs. It supports a
  92          programmable period and duty cycle. A 16-bit counter is used.
  93
  94config PWM_TI_EHRPWM
  95        bool "Enable support for EHRPWM PWM"
  96        depends on DM_PWM && ARCH_OMAP2PLUS
  97        default y
  98        help
  99          PWM driver support for the EHRPWM controller found on TI SOCs.
 100