path: root/drivers/pwm/Kconfig

# 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_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_PROVIDE_GPIO
	bool "Provide a GPIO chip for each PWM chip"
	depends on GPIOLIB
	help
	  Most PWMs can emit both a constant active high and a constant active
	  low signal and so they can be used as GPIO. Say Y here to let each
	  PWM chip provide a GPIO chip and so be easily plugged into consumers
	  that know how to handle GPIOs but not PWMs.

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_ADP5585
	tristate "ADP5585 PWM support"
	depends on MFD_ADP5585
	help
	  This option enables support for the PWM function found in the Analog
	  Devices ADP5585.

config PWM_AIROHA
	tristate "Airoha PWM support"
	depends on ARCH_AIROHA || COMPILE_TEST
	select REGMAP_MMIO
	help
	  Generic PWM framework driver for Airoha SoC.

	  To compile this driver as a module, choose M here: the module
	  will be called pwm-airoha.

config PWM_APPLE
	tristate "Apple SoC PWM support"
	depends on ARCH_APPLE || COMPILE_TEST
	help
	  Generic PWM framework driver for PWM controller present on
	  Apple SoCs

	  Say Y here if you have an ARM Apple laptop, otherwise say N

	  To compile this driver as a module, choose M here: the module
	  will be called pwm-apple.

config PWM_ARGON_FAN_HAT
	tristate "Argon40 Fan HAT support"
	depends on I2C && OF
	help
	  Generic PWM framework driver for Argon40 Fan HAT.

	  To compile this driver as a module, choose M here: the module
	  will be called pwm-argon-fan-hat.

config PWM_ATMEL
	tristate "Atmel PWM support"
	depends on ARCH_AT91 || COMPILE_TEST
	depends on HAS_IOMEM && OF
	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 OF
	select REGMAP_MMIO
	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_AXI_PWMGEN
	tristate "Analog Devices AXI PWM generator"
	depends on MICROBLAZE || NIOS2 || ARCH_ZYNQ || ARCH_ZYNQMP || ARCH_INTEL_SOCFPGA || COMPILE_TEST
	select REGMAP_MMIO
	help
	  This enables support for the Analog Devices AXI PWM generator.

	  This is a configurable PWM generator with variable pulse width and
	  period.

	  To compile this driver as a module, choose M here: the module will be
	  called pwm-axi-pwmgen.

config PWM_BCM2835
	tristate "BCM2835 PWM support"
	depends on ARCH_BCM2835 || ARCH_BRCMSTB || COMPILE_TEST
	depends on HAS_IOMEM
	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_BCM_IPROC
	tristate "iProc PWM support"
	depends on ARCH_BCM_IPROC || COMPILE_TEST
	depends on COMMON_CLK && HAS_IOMEM
	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_BERLIN
	tristate "Marvell Berlin PWM support"
	depends on ARCH_BERLIN || COMPILE_TEST
	depends on HAS_IOMEM
	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
	depends on HAS_IOMEM
	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_CLK
	tristate "Clock based PWM support"
	depends on HAVE_CLK || COMPILE_TEST
	help
	  Generic PWM framework driver for outputs that can be
	  muxed to clocks.

	  To compile this driver as a module, choose M here: the module
	  will be called pwm-clk.

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
	tristate "Intel Crystalcove (CRC) PWM support"
	depends on 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_DWC_CORE
	tristate
	depends on HAS_IOMEM
	help
	  PWM driver for Synopsys DWC PWM Controller.

	  To compile this driver as a module, build the dependecies as
	  modules, this will be called pwm-dwc-core.

config PWM_DWC
	tristate "DesignWare PWM Controller (PCI bus)"
	depends on HAS_IOMEM && PCI
	select PWM_DWC_CORE
	help
	  PWM driver for Synopsys DWC PWM Controller attached to a PCI bus.

	  To compile this driver as a module, choose M here: the module
	  will be called pwm-dwc.

config PWM_EP93XX
	tristate "Cirrus Logic EP93xx PWM support"
	depends on ARCH_EP93XX || COMPILE_TEST
	depends on HAS_IOMEM
	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 "GPIO PWM support"
	depends on GPIOLIB
	depends on HIGH_RES_TIMERS
	help
	  Generic PWM framework driver for software PWM toggling a GPIO pin
	  from kernel high-resolution timers.

	  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
	depends on HAS_IOMEM
	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
	depends on HAS_IOMEM
	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
	depends on HAS_IOMEM
	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_INTEL_LGM
	tristate "Intel LGM PWM support"
	depends on HAS_IOMEM
	depends on (OF && X86) || COMPILE_TEST
	select REGMAP_MMIO
	help
	  Generic PWM fan controller driver for LGM SoC.

	  To compile this driver as a module, choose M here: the module
	  will be called pwm-intel-lgm.

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 MACH_INGENIC || COMPILE_TEST