# SPDX-License-Identifier: GPL-2.0-only
|
menuconfig PWM
|
bool "Pulse-Width Modulation (PWM) Support"
|
help
|
Generic Pulse-Width Modulation (PWM) support.
|
|
In Pulse-Width Modulation, a variation of the width of pulses
|
in a rectangular pulse signal is used as a means to alter the
|
average power of the signal. Applications include efficient
|
power delivery and voltage regulation. In computer systems,
|
PWMs are commonly used to control fans or the brightness of
|
display backlights.
|
|
This framework provides a generic interface to PWM devices
|
within the Linux kernel. On the driver side it provides an API
|
to register and unregister a PWM chip, an abstraction of a PWM
|
controller, that supports one or more PWM devices. Client
|
drivers can request PWM devices and use the generic framework
|
to configure as well as enable and disable them.
|
|
This generic framework replaces the legacy PWM framework which
|
allows only a single driver implementing the required API. Not
|
all legacy implementations have been ported to the framework
|
yet. The framework provides an API that is backward compatible
|
with the legacy framework so that existing client drivers
|
continue to work as expected.
|
|
If unsure, say no.
|
|
if PWM
|
|
config PWM_SYSFS
|
bool
|
default y if SYSFS
|
|
config PWM_DEBUG
|
bool "PWM lowlevel drivers additional checks and debug messages"
|
depends on DEBUG_KERNEL
|
help
|
This option enables some additional checks to help lowlevel driver
|
authors to get their callbacks implemented correctly.
|
It is expected to introduce some runtime overhead and diagnostic
|
output to the kernel log, so only enable while working on a driver.
|
|
config PWM_AB8500
|
tristate "AB8500 PWM support"
|
depends on AB8500_CORE && ARCH_U8500
|
help
|
Generic PWM framework driver for Analog Baseband AB8500.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-ab8500.
|
|
config PWM_ATMEL
|
tristate "Atmel PWM support"
|
depends on OF
|
depends on ARCH_AT91 || COMPILE_TEST
|
help
|
Generic PWM framework driver for Atmel SoC.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-atmel.
|
|
config PWM_ATMEL_HLCDC_PWM
|
tristate "Atmel HLCDC PWM support"
|
depends on MFD_ATMEL_HLCDC
|
depends on HAVE_CLK
|
help
|
Generic PWM framework driver for the PWM output of the HLCDC
|
(Atmel High-end LCD Controller). This PWM output is mainly used
|
to control the LCD backlight.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-atmel-hlcdc.
|
|
config PWM_ATMEL_TCB
|
tristate "Atmel TC Block PWM support"
|
depends on ATMEL_TCLIB && OF
|
help
|
Generic PWM framework driver for Atmel Timer Counter Block.
|
|
A Timer Counter Block provides 6 PWM devices grouped by 2.
|
Devices in a given group must have the same period.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-atmel-tcb.
|
|
config PWM_BCM_IPROC
|
tristate "iProc PWM support"
|
depends on ARCH_BCM_IPROC || COMPILE_TEST
|
depends on COMMON_CLK
|
default ARCH_BCM_IPROC
|
help
|
Generic PWM framework driver for Broadcom iProc PWM block. This
|
block is used in Broadcom iProc SoC's.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-bcm-iproc.
|
|
config PWM_BCM_KONA
|
tristate "Kona PWM support"
|
depends on ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS || COMPILE_TEST
|
depends on HAVE_CLK && HAS_IOMEM
|
default ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS
|
help
|
Generic PWM framework driver for Broadcom Kona PWM block.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-bcm-kona.
|
|
config PWM_BCM2835
|
tristate "BCM2835 PWM support"
|
depends on ARCH_BCM2835 || ARCH_BRCMSTB || COMPILE_TEST
|
help
|
PWM framework driver for BCM2835 controller (Raspberry Pi)
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-bcm2835.
|
|
config PWM_BERLIN
|
tristate "Marvell Berlin PWM support"
|
depends on ARCH_BERLIN || COMPILE_TEST
|
help
|
PWM framework driver for Marvell Berlin SoCs.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-berlin.
|
|
config PWM_BRCMSTB
|
tristate "Broadcom STB PWM support"
|
depends on ARCH_BRCMSTB || BMIPS_GENERIC || COMPILE_TEST
|
help
|
Generic PWM framework driver for the Broadcom Set-top-Box
|
SoCs (BCM7xxx).
|
|
To compile this driver as a module, choose M Here: the module
|
will be called pwm-brcmstb.c.
|
|
config PWM_CLPS711X
|
tristate "CLPS711X PWM support"
|
depends on ARCH_CLPS711X || COMPILE_TEST
|
depends on HAS_IOMEM
|
help
|
Generic PWM framework driver for Cirrus Logic CLPS711X.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-clps711x.
|
|
config PWM_CRC
|
bool "Intel Crystalcove (CRC) PWM support"
|
depends on X86 && INTEL_SOC_PMIC
|
help
|
Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM
|
control.
|
|
config PWM_CROS_EC
|
tristate "ChromeOS EC PWM driver"
|
depends on CROS_EC
|
help
|
PWM driver for exposing a PWM attached to the ChromeOS Embedded
|
Controller.
|
|
config PWM_EP93XX
|
tristate "Cirrus Logic EP93xx PWM support"
|
depends on ARCH_EP93XX || COMPILE_TEST
|
help
|
Generic PWM framework driver for Cirrus Logic EP93xx.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-ep93xx.
|
|
config PWM_FSL_FTM
|
tristate "Freescale FlexTimer Module (FTM) PWM support"
|
depends on HAS_IOMEM
|
depends on OF
|
select REGMAP_MMIO
|
help
|
Generic FTM PWM framework driver for Freescale VF610 and
|
Layerscape LS-1 SoCs.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-fsl-ftm.
|
|
config PWM_GPIO
|
tristate "Generic GPIO bit-banged PWM driver"
|
depends on OF
|
depends on GPIOLIB
|
help
|
Some platforms do not offer any hardware PWM capabilities but do have
|
General Purpose Input Output (GPIO) pins available. Using the kernels
|
High-Resolution Timer API this driver tries to toggle GPIO using the
|
generic kernel PWM framework. The maximum frequency and/or accuracy
|
is dependent on several factors such as system load and the maximum
|
speed a pin can be toggled at the hardware.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-gpio.
|
|
config PWM_HIBVT
|
tristate "HiSilicon BVT PWM support"
|
depends on ARCH_HISI || COMPILE_TEST
|
help
|
Generic PWM framework driver for HiSilicon BVT SoCs.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-hibvt.
|
|
config PWM_IMG
|
tristate "Imagination Technologies PWM driver"
|
depends on HAS_IOMEM
|
depends on MFD_SYSCON
|
depends on COMMON_CLK
|
depends on MIPS || COMPILE_TEST
|
help
|
Generic PWM framework driver for Imagination Technologies
|
PWM block which supports 4 channels.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-img
|
|
config PWM_IMX1
|
tristate "i.MX1 PWM support"
|
depends on ARCH_MXC || COMPILE_TEST
|
help
|
Generic PWM framework driver for i.MX1 and i.MX21
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-imx1.
|
|
config PWM_IMX27
|
tristate "i.MX27 PWM support"
|
depends on ARCH_MXC || COMPILE_TEST
|
help
|
Generic PWM framework driver for i.MX27 and later i.MX SoCs.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-imx27.
|
|
config PWM_IMX_TPM
|
tristate "i.MX TPM PWM support"
|
depends on ARCH_MXC || COMPILE_TEST
|
depends on HAVE_CLK && HAS_IOMEM
|
help
|
Generic PWM framework driver for i.MX7ULP TPM module, TPM's full
|
name is Low Power Timer/Pulse Width Modulation Module.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-imx-tpm.
|
|
config PWM_IQS620A
|
tristate "Azoteq IQS620A PWM support"
|
depends on MFD_IQS62X || COMPILE_TEST
|
help
|
Generic PWM framework driver for the Azoteq IQS620A multi-function
|
sensor.
|
|
To compile this driver as a module, choose M here: the module will
|
be called pwm-iqs620a.
|
|
config PWM_JZ4740
|
tristate "Ingenic JZ47xx PWM support"
|
depends on MIPS
|
depends on COMMON_CLK
|
select MFD_SYSCON
|
help
|
Generic PWM framework driver for Ingenic JZ47xx based
|
machines.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-jz4740.
|
|
config PWM_LP3943
|
tristate "TI/National Semiconductor LP3943 PWM support"
|
depends on MFD_LP3943
|
help
|
Generic PWM framework driver for LP3943 which supports two PWM
|
channels.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-lp3943.
|
|
config PWM_LPC18XX_SCT
|
tristate "LPC18xx/43xx PWM/SCT support"
|
depends on ARCH_LPC18XX || COMPILE_TEST
|
help
|
Generic PWM framework driver for NXP LPC18xx PWM/SCT which
|
supports 16 channels.
|
A maximum of 15 channels can be requested simultaneously and
|
must have the same period.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-lpc18xx-sct.
|
|
config PWM_LPC32XX
|
tristate "LPC32XX PWM support"
|
depends on ARCH_LPC32XX || COMPILE_TEST
|
help
|
Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two
|
PWM controllers.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-lpc32xx.
|
|
config PWM_LPSS
|
tristate
|
|
config PWM_LPSS_PCI
|
tristate "Intel LPSS PWM PCI driver"
|
depends on X86 && PCI
|
select PWM_LPSS
|
help
|
The PCI driver for Intel Low Power Subsystem PWM controller.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-lpss-pci.
|
|
config PWM_LPSS_PLATFORM
|
tristate "Intel LPSS PWM platform driver"
|
depends on X86 && ACPI
|
select PWM_LPSS
|
help
|
The platform driver for Intel Low Power Subsystem PWM controller.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-lpss-platform.
|
|
config PWM_MESON
|
tristate "Amlogic Meson PWM driver"
|
depends on ARCH_MESON || COMPILE_TEST
|
depends on COMMON_CLK
|
help
|
The platform driver for Amlogic Meson PWM controller.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-meson.
|
|
config PWM_MTK_DISP
|
tristate "MediaTek display PWM driver"
|
depends on ARCH_MEDIATEK || COMPILE_TEST
|
depends on HAS_IOMEM
|
help
|
Generic PWM framework driver for MediaTek disp-pwm device.
|
The PWM is used to control the backlight brightness for display.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-mtk-disp.
|
|
config PWM_MEDIATEK
|
tristate "MediaTek PWM support"
|
depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST
|
help
|
Generic PWM framework driver for Mediatek ARM SoC.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-mediatek.
|
|
config PWM_MXS
|
tristate "Freescale MXS PWM support"
|
depends on OF
|
depends on ARCH_MXS || COMPILE_TEST
|
select STMP_DEVICE
|
help
|
Generic PWM framework driver for Freescale MXS.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-mxs.
|
|
config PWM_OMAP_DMTIMER
|
tristate "OMAP Dual-Mode Timer PWM support"
|
depends on OF
|
depends on OMAP_DM_TIMER || COMPILE_TEST
|
help
|
Generic PWM framework driver for OMAP Dual-Mode Timer PWM output
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-omap-dmtimer
|
|
config PWM_PCA9685
|
tristate "NXP PCA9685 PWM driver"
|
depends on I2C
|
select REGMAP_I2C
|
help
|
Generic PWM framework driver for NXP PCA9685 LED controller.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-pca9685.
|
|
config PWM_PXA
|
tristate "PXA PWM support"
|
depends on ARCH_PXA || COMPILE_TEST
|
help
|
Generic PWM framework driver for PXA.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-pxa.
|
|
config PWM_RCAR
|
tristate "Renesas R-Car PWM support"
|
depends on ARCH_RENESAS || COMPILE_TEST
|
depends on HAS_IOMEM
|
help
|
This driver exposes the PWM Timer controller found in Renesas
|
R-Car chips through the PWM API.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-rcar.
|
|
config PWM_RENESAS_TPU
|
tristate "Renesas TPU PWM support"
|
depends on ARCH_RENESAS || COMPILE_TEST
|
depends on HAS_IOMEM
|
help
|
This driver exposes the Timer Pulse Unit (TPU) PWM controller found
|
in Renesas chips through the PWM API.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-renesas-tpu.
|
|
config PWM_ROCKCHIP
|
tristate "Rockchip PWM support"
|
depends on ARCH_ROCKCHIP || COMPILE_TEST
|
help
|
Generic PWM framework driver for the PWM controller found on
|
Rockchip SoCs.
|
|
config PWM_ROCKCHIP_ONESHOT
|
bool "Rockchip PWM oneshot mode support"
|
depends on PWM_ROCKCHIP && NO_GKI
|
help
|
Support Rockchip pwm oneshot mode for specified number of cycles.
|
|
config PWM_SAMSUNG
|
tristate "Samsung PWM support"
|
depends on PLAT_SAMSUNG || ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST
|
help
|
Generic PWM framework driver for Samsung.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-samsung.
|
|
config PWM_SIFIVE
|
tristate "SiFive PWM support"
|
depends on OF
|
depends on COMMON_CLK
|
depends on RISCV || COMPILE_TEST
|
help
|
Generic PWM framework driver for SiFive SoCs.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-sifive.
|
|
config PWM_SL28CPLD
|
tristate "Kontron sl28cpld PWM support"
|
depends on MFD_SL28CPLD || COMPILE_TEST
|
help
|
Generic PWM framework driver for board management controller
|
found on the Kontron sl28 CPLD.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-sl28cpld.
|
|
config PWM_SPEAR
|
tristate "STMicroelectronics SPEAr PWM support"
|
depends on PLAT_SPEAR || COMPILE_TEST
|
depends on OF
|
help
|
Generic PWM framework driver for the PWM controller on ST
|
SPEAr SoCs.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-spear.
|
|
config PWM_SPRD
|
tristate "Spreadtrum PWM support"
|
depends on ARCH_SPRD || COMPILE_TEST
|
depends on HAS_IOMEM
|
help
|
Generic PWM framework driver for the PWM controller on
|
Spreadtrum SoCs.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-sprd.
|
|
config PWM_STI
|
tristate "STiH4xx PWM support"
|
depends on ARCH_STI || COMPILE_TEST
|
depends on OF
|
help
|
Generic PWM framework driver for STiH4xx SoCs.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-sti.
|
|
config PWM_STM32
|
tristate "STMicroelectronics STM32 PWM"
|
depends on MFD_STM32_TIMERS || COMPILE_TEST
|
help
|
Generic PWM framework driver for STM32 SoCs.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-stm32.
|
|
config PWM_STM32_LP
|
tristate "STMicroelectronics STM32 PWM LP"
|
depends on MFD_STM32_LPTIMER || COMPILE_TEST
|
help
|
Generic PWM framework driver for STMicroelectronics STM32 SoCs
|
with Low-Power Timer (LPTIM).
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-stm32-lp.
|
|
config PWM_STMPE
|
bool "STMPE expander PWM export"
|
depends on MFD_STMPE
|
help
|
This enables support for the PWMs found in the STMPE I/O
|
expanders.
|
|
config PWM_SUN4I
|
tristate "Allwinner PWM support"
|
depends on ARCH_SUNXI || COMPILE_TEST
|
depends on HAS_IOMEM && COMMON_CLK
|
help
|
Generic PWM framework driver for Allwinner SoCs.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-sun4i.
|
|
config PWM_TEGRA
|
tristate "NVIDIA Tegra PWM support"
|
depends on ARCH_TEGRA || COMPILE_TEST
|
help
|
Generic PWM framework driver for the PWFM controller found on NVIDIA
|
Tegra SoCs.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-tegra.
|
|
config PWM_TIECAP
|
tristate "ECAP PWM support"
|
depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST
|
help
|
PWM driver support for the ECAP APWM controller found on TI SOCs
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-tiecap.
|
|
config PWM_TIEHRPWM
|
tristate "EHRPWM PWM support"
|
depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3 || COMPILE_TEST
|
help
|
PWM driver support for the EHRPWM controller found on TI SOCs
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-tiehrpwm.
|
|
config PWM_TWL
|
tristate "TWL4030/6030 PWM support"
|
depends on TWL4030_CORE
|
help
|
Generic PWM framework driver for TWL4030/6030.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-twl.
|
|
config PWM_TWL_LED
|
tristate "TWL4030/6030 PWM support for LED drivers"
|
depends on TWL4030_CORE
|
help
|
Generic PWM framework driver for TWL4030/6030 LED terminals.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-twl-led.
|
|
config PWM_VT8500
|
tristate "vt8500 PWM support"
|
depends on ARCH_VT8500 || COMPILE_TEST
|
help
|
Generic PWM framework driver for vt8500.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-vt8500.
|
|
config PWM_ZX
|
tristate "ZTE ZX PWM support"
|
depends on ARCH_ZX || COMPILE_TEST
|
help
|
Generic PWM framework driver for ZTE ZX family SoCs.
|
|
To compile this driver as a module, choose M here: the module
|
will be called pwm-zx.
|
|
endif
|
