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linux/drivers/pwm/Kconfig
Linus Torvalds 7b9df264f0 pwm: Changes for v5.13-rc1 
This set of changes adds support for the PWM controller found on Toshiba
 Visconti SoCs and converts a couple of drivers to the atomic API.
 
 There's also a bunch of cleanups and minor fixes across the board.
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Merge tag 'pwm/for-5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm

Pull pwm updates from Thierry Reding:
 "This adds support for the PWM controller found on Toshiba Visconti
  SoCs and converts a couple of drivers to the atomic API.

  There's also a bunch of cleanups and minor fixes across the board"

* tag 'pwm/for-5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (35 commits)
  pwm: Reword docs about pwm_apply_state()
  pwm: atmel: Improve duty cycle calculation in .apply()
  pwm: atmel: Fix duty cycle calculation in .get_state()
  pwm: visconti: Add Toshiba Visconti SoC PWM support
  dt-bindings: pwm: Add bindings for Toshiba Visconti PWM Controller
  arm64: dts: rockchip: Remove clock-names from PWM nodes
  ARM: dts: rockchip: Remove clock-names from PWM nodes
  dt-bindings: pwm: rockchip: Add more compatible strings
  dt-bindings: pwm: Convert pwm-rockchip.txt to YAML
  pwm: mediatek: Remove unused function
  pwm: pca9685: Improve runtime PM behavior
  pwm: pca9685: Support hardware readout
  pwm: pca9685: Switch to atomic API
  pwm: lpss: Don't modify HW state in .remove callback
  pwm: sti: Free resources only after pwmchip_remove()
  pwm: sti: Don't modify HW state in .remove callback
  pwm: lpc3200: Don't modify HW state in .remove callback
  pwm: lpc18xx-sct: Free resources only after pwmchip_remove()
  pwm: bcm-kona: Don't modify HW state in .remove callback
  pwm: bcm2835: Free resources only after pwmchip_remove()
  ...
2021-05-05 12:53:16 -07:00

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# 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 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_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_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_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_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_DWC
tristate "DesignWare PWM Controller"
depends on PCI
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_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 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_KEEMBAY
tristate "Intel Keem Bay PWM driver"
depends on ARCH_KEEMBAY || (ARM64 && COMPILE_TEST)
help
The platform driver for Intel Keem Bay PWM controller.
To compile this driver as a module, choose M here: the module
will be called pwm-keembay.
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
depends on HAS_IOMEM
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
depends on HAS_IOMEM
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
depends on HAS_IOMEM
tristate
config PWM_LPSS_PCI
tristate "Intel LPSS PWM PCI driver"
depends on X86 || COMPILE_TEST
depends on HAS_IOMEM && 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) || COMPILE_TEST
depends on HAS_IOMEM
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 && HAS_IOMEM
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
depends on HAS_IOMEM
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 ARCH_MXS || COMPILE_TEST
depends on HAS_IOMEM && OF
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_NTXEC
tristate "Netronix embedded controller PWM support"
depends on MFD_NTXEC
help
Say yes here if you want to support the PWM output of the embedded
controller found in certain e-book readers designed by the original
design manufacturer Netronix.
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
depends on HAS_IOMEM
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_RASPBERRYPI_POE
tristate "Raspberry Pi Firwmware PoE Hat PWM support"
# Make sure not 'y' when RASPBERRYPI_FIRMWARE is 'm'. This can only
# happen when COMPILE_TEST=y, hence the added !RASPBERRYPI_FIRMWARE.
depends on RASPBERRYPI_FIRMWARE || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE)
help
Enable Raspberry Pi firmware controller PWM bus used to control the
official RPI PoE hat
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
depends on HAS_IOMEM
help
Generic PWM framework driver for the PWM controller found on
Rockchip SoCs.
config PWM_SAMSUNG
tristate "Samsung PWM support"
depends on PLAT_SAMSUNG || ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST
depends on HAS_IOMEM
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 && HAS_IOMEM
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 HAS_IOMEM && 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 HAS_IOMEM && 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
depends on HAS_IOMEM
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
depends on HAS_IOMEM
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
depends on HAS_IOMEM
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_VISCONTI
tristate "Toshiba Visconti PWM support"
depends on ARCH_VISCONTI || COMPILE_TEST
help
PWM Subsystem driver support for Toshiba Visconti SoCs.
To compile this driver as a module, choose M here: the module
will be called pwm-visconti.
config PWM_VT8500
tristate "vt8500 PWM support"
depends on ARCH_VT8500 || COMPILE_TEST
depends on HAS_IOMEM
help
Generic PWM framework driver for vt8500.
To compile this driver as a module, choose M here: the module
will be called pwm-vt8500.
endif
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