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+config DM_PWM
+ bool "Enable support for pulse-width modulation devices (PWM)"
+ depends on DM
+ help
+ A pulse-width modulator emits a pulse of varying width and provides
+ control over the duty cycle (high and low time) of the signal. This
+ is often used to control a voltage level. The more time the PWM
+ spends in the 'high' state, the higher the voltage. The PWM's
+ frequency/period can be controlled along with the proportion of that
+ time that the signal is high.
+
+config PWM_CROS_EC
+ bool "Enable support for the Chrome OS EC PWM"
+ depends on DM_PWM
+ help
+ This PWM is found on several Chrome OS devices and controlled by
+ the Chrome OS embedded controller. It may be used to control the
+ screen brightness and/or the keyboard backlight depending on the
+ device.
+
+config PWM_EXYNOS
+ bool "Enable support for the Exynos PWM"
+ depends on DM_PWM
+ help
+ This PWM is found on Samsung Exynos 5250 and other Samsung SoCs. It
+ supports a programmable period and duty cycle. A 32-bit counter is
+ used. It provides 5 channels which can be independently
+ programmed. Channel 4 (the last) is normally used as a timer.
+
+config PWM_IMX
+ bool "Enable support for i.MX27 and later PWM"
+ help
+ This PWM is found i.MX27 and later i.MX SoCs.
+
+config PWM_MESON
+ bool "Enable support for Amlogic Meson SoCs PWM"
+ depends on DM_PWM
+ help
+ This PWM is found on Amlogic Meson SoCs. It supports a
+ programmable period and duty cycle for 2 independant channels.
+
+config PWM_MTK
+ bool "Enable support for MediaTek PWM"
+ depends on DM_PWM
+ help
+ This PWM is found on MT7622, MT7623, and MT7629. It supports a
+ programmable period and duty cycle.
+
+config PWM_ROCKCHIP
+ bool "Enable support for the Rockchip PWM"
+ depends on DM_PWM
+ help
+ This PWM is found on RK3288 and other Rockchip SoCs. It supports a
+ programmable period and duty cycle. A 32-bit counter is used.
+ Various options provided in the hardware (such as capture mode and
+ continuous/single-shot) are not supported by the driver.
+
+config PWM_SANDBOX
+ bool "Enable support for the sandbox PWM"
+ help
+ This is a sandbox PWM used for testing. It provides 3 channels and
+ records the settings passed into it, but otherwise does nothing
+ useful. The PWM can be enabled but is not connected to any outputs
+ so this is not very useful.
+
+config PWM_SIFIVE
+ bool "Enable support for SiFive PWM"
+ depends on DM_PWM
+ help
+ This PWM is found SiFive's FU540 and other SoCs.
+
+config PWM_TEGRA
+ bool "Enable support for the Tegra PWM"
+ depends on DM_PWM
+ help
+ This PWM is found on Tegra 20 and other Nvidia SoCs. It supports
+ four channels with a programmable period and duty cycle. Only a
+ 32KHz clock is supported by the driver but the duty cycle is
+ configurable.
+
+config PWM_SUNXI
+ bool "Enable support for the Allwinner Sunxi PWM"
+ depends on DM_PWM
+ help
+ This PWM is found on H3, A64 and other Allwinner SoCs. It supports a
+ programmable period and duty cycle. A 16-bit counter is used.
+
+config PWM_TI_EHRPWM
+ bool "Enable support for EHRPWM PWM"
+ depends on DM_PWM && ARCH_OMAP2PLUS
+ default y
+ help
+ PWM driver support for the EHRPWM controller found on TI SOCs.