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_ASPEED
  13        bool "Enable support for the Aspeed PWM"
  14        depends on DM_PWM
  15        select SYSCON
  16        help
  17          This PWM is found on Ast2600 SoCs. It supports a programmable period
  18          and duty cycle. It provides 16 channels which can be independently
  19          programmed.
  20
  21config PWM_AT91
  22        bool "Enable support for PWM found on AT91 SoC's"
  23        depends on DM_PWM && ARCH_AT91
  24        help
  25          Support for PWM hardware on AT91 based SoC.
  26
  27config PWM_CADENCE_TTC
  28        bool "Enable support for the Cadence TTC PWM"
  29        depends on DM_PWM && !CADENCE_TTC_TIMER
  30        help
  31          Cadence TTC can be configured as timer which is done via
  32          CONFIG_CADENCE_TTC_TIMER or as PWM. This is covering only PWM now.
  33
  34config PWM_CROS_EC
  35        bool "Enable support for the Chrome OS EC PWM"
  36        depends on DM_PWM
  37        help
  38          This PWM is found on several Chrome OS devices and controlled by
  39          the Chrome OS embedded controller. It may be used to control the
  40          screen brightness and/or the keyboard backlight depending on the
  41          device.
  42
  43config PWM_EXYNOS
  44        bool "Enable support for the Exynos PWM"
  45        depends on DM_PWM
  46        help
  47          This PWM is found on Samsung Exynos 5250 and other Samsung SoCs. It
  48          supports a programmable period and duty cycle. A 32-bit counter is
  49          used. It provides 5 channels which can be independently
  50          programmed. Channel 4 (the last) is normally used as a timer.
  51
  52config PWM_IMX
  53        bool "Enable support for i.MX27 and later PWM"
  54        help
  55          This PWM is found i.MX27 and later i.MX SoCs.
  56
  57config PWM_MESON
  58        bool "Enable support for Amlogic Meson SoCs PWM"
  59        depends on DM_PWM
  60        help
  61          This PWM is found on Amlogic Meson SoCs. It supports a
  62          programmable period and duty cycle for 2 independant channels.
  63
  64config PWM_MTK
  65        bool "Enable support for MediaTek PWM"
  66        depends on DM_PWM
  67        help
  68          This PWM is found on MT7622, MT7623, and MT7629. It supports a
  69          programmable period and duty cycle.
  70
  71config PWM_ROCKCHIP
  72        bool "Enable support for the Rockchip PWM"
  73        depends on DM_PWM
  74        help
  75          This PWM is found on RK3288 and other Rockchip SoCs. It supports a
  76          programmable period and duty cycle. A 32-bit counter is used.
  77          Various options provided in the hardware (such as capture mode and
  78          continuous/single-shot) are not supported by the driver.
  79
  80config PWM_SANDBOX
  81        bool "Enable support for the sandbox PWM"
  82        help
  83          This is a sandbox PWM used for testing. It provides 3 channels and
  84          records the settings passed into it, but otherwise does nothing
  85          useful. The PWM can be enabled but is not connected to any outputs
  86          so this is not very useful.
  87
  88config PWM_S5P
  89        bool "Enable non-DM support for S5P PWM"
  90        depends on (S5P || ARCH_NEXELL)
  91        default y
  92
  93config PWM_SIFIVE
  94        bool "Enable support for SiFive PWM"
  95        depends on DM_PWM
  96        help
  97          This PWM is found SiFive's FU540 and other SoCs.
  98
  99config PWM_TEGRA
 100        bool "Enable support for the Tegra PWM"
 101        depends on DM_PWM
 102        help
 103          This PWM is found on Tegra 20 and other Nvidia SoCs. It supports
 104          four channels with a programmable period and duty cycle. Only a
 105          32KHz clock is supported by the driver but the duty cycle is
 106          configurable.
 107
 108config PWM_SUNXI
 109        bool "Enable support for the Allwinner Sunxi PWM"
 110        depends on DM_PWM
 111        help
 112          This PWM is found on H3, A64 and other Allwinner SoCs. It supports a
 113          programmable period and duty cycle. A 16-bit counter is used.
 114
 115config PWM_TI_EHRPWM
 116        bool "Enable support for EHRPWM PWM"
 117        depends on DM_PWM && ARCH_OMAP2PLUS
 118        default y
 119        help
 120          PWM driver support for the EHRPWM controller found on TI SOCs.
 121