| menu "Pulse-width modulation (PWM)" | |
| 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_IMX | |
| bool "Enable support for i.MX27 and later PWM" | |
| depends on MACH_IMX | |
| help | |
| This PWM is found i.MX27 and later i.MX SoCs. | |
| config PWM_S5P | |
| bool "Enable non-DM support for S5P PWM" | |
| depends on (S5P || ARCH_NEXELL) | |
| default y | |
| if DM_PWM | |
| config PWM_ASPEED | |
| bool "Enable support for the Aspeed PWM" | |
| select SYSCON | |
| help | |
| This PWM is found on Ast2600 SoCs. It supports a programmable period | |
| and duty cycle. It provides 16 channels which can be independently | |
| programmed. | |
| config PWM_AT91 | |
| bool "Enable support for PWM found on AT91 SoC's" | |
| depends on ARCH_AT91 | |
| help | |
| Support for PWM hardware on AT91 based SoC. | |
| config PWM_CADENCE_TTC | |
| bool "Enable support for the Cadence TTC PWM" | |
| depends on !CADENCE_TTC_TIMER | |
| help | |
| Cadence TTC can be configured as timer which is done via | |
| CONFIG_CADENCE_TTC_TIMER or as PWM. This is covering only PWM now. | |
| config PWM_CROS_EC | |
| bool "Enable support for the Chrome OS EC 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 ARCH_EXYNOS | |
| 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_MESON | |
| bool "Enable support for Amlogic Meson SoCs PWM" | |
| help | |
| This PWM is found on Amlogic Meson SoCs. It supports a | |
| programmable period and duty cycle for 2 independent channels. | |
| config PWM_MTK | |
| bool "Enable support for MediaTek 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 ARCH_ROCKCHIP | |
| 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" | |
| help | |
| This PWM is found SiFive's FU540 and other SoCs. | |
| config PWM_TEGRA | |
| bool "Enable support for the Tegra PWM" | |
| depends on ARCH_TEGRA | |
| 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_STM32 | |
| bool "Enable support for STM32 PWM" | |
| depends on MFD_STM32_TIMERS | |
| help | |
| This enables PWM driver for STMicroelectronics STM32 pulse width | |
| modulation. It uses STM32 timer devices that can have up to 4 output | |
| channels, with complementary outputs and configurable polarity. | |
| config PWM_SUNXI | |
| bool "Enable support for the Allwinner Sunxi PWM" | |
| depends on ARCH_SUNXI | |
| 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 ARCH_OMAP2PLUS | |
| default y | |
| help | |
| PWM driver support for the EHRPWM controller found on TI SOCs. | |
| config PWM_TI_ECAP | |
| bool "Enable support for ECAP PWM" | |
| depends on ARCH_OMAP2PLUS | |
| help | |
| PWM driver support for the ECAP controller found on TI SOCs. | |
| endif | |
| endmenu |