| # 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 || COMPILE_TEST |
| 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 || COMPILE_TEST |
| depends on COMMON_CLK && HAS_IOMEM |
| 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 S3C24xx, S3C64xx, S5Pv210 |
| and Exynos SoCs. |
| Choose Y here only if you build for such Samsung SoC. |
| |
| 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 |
