forked from Minki/linux
e37e3bc7e2
Besides one new driver being added for the PWM controller found in various Spreadtrum SoCs, this series of changes brings a slew of, mostly minor, fixes and cleanups for existing drivers, as well as some enhancements to the core code. Lastly, Uwe is added to the PWM subsystem entry of the MAINTAINERS file, making official his role as a reviewer. -----BEGIN PGP SIGNATURE----- iQJNBAABCAA3FiEEiOrDCAFJzPfAjcif3SOs138+s6EFAl2ON5UZHHRoaWVycnku cmVkaW5nQGdtYWlsLmNvbQAKCRDdI6zXfz6zoVg2EAC2QP51EywsDVQd8ZFvXBZB SL2RN9EWY0nHFnjGL2VSEOvsWWoE2HgrzXbWuiKDSkpRMTGtz/R1VznmBegZpVz/ eKP1ebFU+1EQ2A1GB4VLGslGVs0R7uvQap7KMRf+nD6qzstwWlz5nPP8E/4dipAX fYZBU37sTvAXycVosqAOiGaJvwfbo0ExysCD0bWccp52O06osgbZwGDhShDRTQv0 wOLR/rPbYXbVMyETlO8gjHVGU/N6cAq0SDR2VGcXqIe3H86K3R7ec8TEhcLJy6R5 nLX9Wx+gMyiWJGrU+s5i682VUdzQeLE4sH9c47M8qqreM4ytXfdttMeg3hgmalra eVm4uWtJ2+ZDRSl+yqJ8GfuSVGV4S9uQNlJ0OkAizmz+mU2WGeM1v8aOFlGokSi0 mxt+EZFdS7M0rZpWU0Fv01urxdhhVgsFXkD72xldV2vnIP6afhzGgKN3S6zbwzAQ WOgTHgVmcenM4hRcEmV8n7nF6f8BIA5RSNx+jrrkRD4gwHwDAiEK7hWJTCDXisB9 J6HgChqztrNtnyZMOealHxEgTtJqRUVX69mo9NaUeYps2Qg4y1gStLC3b1YnJZcI sTCrKhVjhFn1bNOe1UBSvcehIorL3mFV203TBgJJaMMhoJYE28XqYTNkGVDZ2bLP DdyExtL1Dx7IxEwS7IGOwA== =C9sW -----END PGP SIGNATURE----- Merge tag 'pwm/for-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm Pull pwm updates from Thierry Reding: "Besides one new driver being added for the PWM controller found in various Spreadtrum SoCs, this series of changes brings a slew of, mostly minor, fixes and cleanups for existing drivers, as well as some enhancements to the core code. Lastly, Uwe is added to the PWM subsystem entry of the MAINTAINERS file, making official his role as a reviewer" * tag 'pwm/for-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (34 commits) MAINTAINERS: Add myself as reviewer for the PWM subsystem MAINTAINERS: Add patchwork link for PWM entry MAINTAINERS: Add a selection of PWM related keywords to the PWM entry pwm: mediatek: Add MT7629 compatible string dt-bindings: pwm: Update bindings for MT7629 SoC pwm: mediatek: Update license and switch to SPDX tag pwm: mediatek: Use pwm_mediatek as common prefix pwm: mediatek: Allocate the clks array dynamically pwm: mediatek: Remove the has_clks field pwm: mediatek: Drop the check for of_device_get_match_data() pwm: atmel: Consolidate driver data initialization pwm: atmel: Remove unneeded check for match data pwm: atmel: Remove platform_device_id and use only dt bindings pwm: stm32-lp: Add check in case requested period cannot be achieved pwm: Ensure pwm_apply_state() doesn't modify the state argument pwm: fsl-ftm: Don't update the state for the caller of pwm_apply_state() pwm: sun4i: Don't update the state for the caller of pwm_apply_state() pwm: rockchip: Don't update the state for the caller of pwm_apply_state() pwm: Let pwm_get_state() return the last implemented state pwm: Introduce local struct pwm_chip in pwm_apply_state() ...
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557 lines
15 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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menuconfig PWM
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bool "Pulse-Width Modulation (PWM) Support"
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help
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Generic Pulse-Width Modulation (PWM) support.
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In Pulse-Width Modulation, a variation of the width of pulses
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in a rectangular pulse signal is used as a means to alter the
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average power of the signal. Applications include efficient
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power delivery and voltage regulation. In computer systems,
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PWMs are commonly used to control fans or the brightness of
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display backlights.
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This framework provides a generic interface to PWM devices
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within the Linux kernel. On the driver side it provides an API
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to register and unregister a PWM chip, an abstraction of a PWM
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controller, that supports one or more PWM devices. Client
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drivers can request PWM devices and use the generic framework
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to configure as well as enable and disable them.
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This generic framework replaces the legacy PWM framework which
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allows only a single driver implementing the required API. Not
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all legacy implementations have been ported to the framework
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yet. The framework provides an API that is backward compatible
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with the legacy framework so that existing client drivers
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continue to work as expected.
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If unsure, say no.
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if PWM
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config PWM_SYSFS
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bool
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default y if SYSFS
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config PWM_AB8500
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tristate "AB8500 PWM support"
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depends on AB8500_CORE && ARCH_U8500
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help
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Generic PWM framework driver for Analog Baseband AB8500.
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To compile this driver as a module, choose M here: the module
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will be called pwm-ab8500.
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config PWM_ATMEL
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tristate "Atmel PWM support"
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depends on ARCH_AT91 && OF
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help
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Generic PWM framework driver for Atmel SoC.
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To compile this driver as a module, choose M here: the module
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will be called pwm-atmel.
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config PWM_ATMEL_HLCDC_PWM
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tristate "Atmel HLCDC PWM support"
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depends on MFD_ATMEL_HLCDC
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depends on HAVE_CLK
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help
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Generic PWM framework driver for the PWM output of the HLCDC
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(Atmel High-end LCD Controller). This PWM output is mainly used
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to control the LCD backlight.
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To compile this driver as a module, choose M here: the module
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will be called pwm-atmel-hlcdc.
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config PWM_ATMEL_TCB
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tristate "Atmel TC Block PWM support"
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depends on ATMEL_TCLIB && OF
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help
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Generic PWM framework driver for Atmel Timer Counter Block.
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A Timer Counter Block provides 6 PWM devices grouped by 2.
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Devices in a given group must have the same period.
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To compile this driver as a module, choose M here: the module
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will be called pwm-atmel-tcb.
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config PWM_BCM_IPROC
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tristate "iProc PWM support"
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depends on ARCH_BCM_IPROC || COMPILE_TEST
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depends on COMMON_CLK
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default ARCH_BCM_IPROC
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help
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Generic PWM framework driver for Broadcom iProc PWM block. This
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block is used in Broadcom iProc SoC's.
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To compile this driver as a module, choose M here: the module
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will be called pwm-bcm-iproc.
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config PWM_BCM_KONA
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tristate "Kona PWM support"
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depends on ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS || COMPILE_TEST
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depends on HAVE_CLK && HAS_IOMEM
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default ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS
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help
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Generic PWM framework driver for Broadcom Kona PWM block.
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To compile this driver as a module, choose M here: the module
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will be called pwm-bcm-kona.
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config PWM_BCM2835
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tristate "BCM2835 PWM support"
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depends on ARCH_BCM2835
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help
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PWM framework driver for BCM2835 controller (Raspberry Pi)
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To compile this driver as a module, choose M here: the module
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will be called pwm-bcm2835.
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config PWM_BERLIN
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tristate "Marvell Berlin PWM support"
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depends on ARCH_BERLIN
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help
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PWM framework driver for Marvell Berlin SoCs.
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To compile this driver as a module, choose M here: the module
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will be called pwm-berlin.
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config PWM_BRCMSTB
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tristate "Broadcom STB PWM support"
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depends on ARCH_BRCMSTB || BMIPS_GENERIC
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help
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Generic PWM framework driver for the Broadcom Set-top-Box
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SoCs (BCM7xxx).
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To compile this driver as a module, choose M Here: the module
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will be called pwm-brcmstb.c.
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config PWM_CLPS711X
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tristate "CLPS711X PWM support"
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depends on ARCH_CLPS711X || COMPILE_TEST
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depends on HAS_IOMEM
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help
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Generic PWM framework driver for Cirrus Logic CLPS711X.
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To compile this driver as a module, choose M here: the module
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will be called pwm-clps711x.
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config PWM_CRC
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bool "Intel Crystalcove (CRC) PWM support"
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depends on X86 && INTEL_SOC_PMIC
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help
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Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM
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control.
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config PWM_CROS_EC
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tristate "ChromeOS EC PWM driver"
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depends on CROS_EC
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help
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PWM driver for exposing a PWM attached to the ChromeOS Embedded
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Controller.
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config PWM_EP93XX
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tristate "Cirrus Logic EP93xx PWM support"
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depends on ARCH_EP93XX
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help
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Generic PWM framework driver for Cirrus Logic EP93xx.
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To compile this driver as a module, choose M here: the module
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will be called pwm-ep93xx.
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config PWM_FSL_FTM
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tristate "Freescale FlexTimer Module (FTM) PWM support"
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depends on HAS_IOMEM
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depends on OF
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select REGMAP_MMIO
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help
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Generic FTM PWM framework driver for Freescale VF610 and
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Layerscape LS-1 SoCs.
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To compile this driver as a module, choose M here: the module
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will be called pwm-fsl-ftm.
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config PWM_HIBVT
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tristate "HiSilicon BVT PWM support"
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depends on ARCH_HISI || COMPILE_TEST
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help
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Generic PWM framework driver for HiSilicon BVT SoCs.
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To compile this driver as a module, choose M here: the module
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will be called pwm-hibvt.
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config PWM_IMG
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tristate "Imagination Technologies PWM driver"
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depends on HAS_IOMEM
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depends on MFD_SYSCON
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depends on COMMON_CLK
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depends on MIPS || COMPILE_TEST
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help
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Generic PWM framework driver for Imagination Technologies
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PWM block which supports 4 channels.
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To compile this driver as a module, choose M here: the module
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will be called pwm-img
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config PWM_IMX1
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tristate "i.MX1 PWM support"
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depends on ARCH_MXC
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help
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Generic PWM framework driver for i.MX1 and i.MX21
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To compile this driver as a module, choose M here: the module
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will be called pwm-imx1.
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config PWM_IMX27
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tristate "i.MX27 PWM support"
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depends on ARCH_MXC
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help
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Generic PWM framework driver for i.MX27 and later i.MX SoCs.
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To compile this driver as a module, choose M here: the module
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will be called pwm-imx27.
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config PWM_IMX_TPM
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tristate "i.MX TPM PWM support"
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depends on ARCH_MXC || COMPILE_TEST
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depends on HAVE_CLK && HAS_IOMEM
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help
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Generic PWM framework driver for i.MX7ULP TPM module, TPM's full
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name is Low Power Timer/Pulse Width Modulation Module.
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To compile this driver as a module, choose M here: the module
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will be called pwm-imx-tpm.
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config PWM_JZ4740
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tristate "Ingenic JZ47xx PWM support"
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depends on MACH_INGENIC
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help
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Generic PWM framework driver for Ingenic JZ47xx based
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machines.
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To compile this driver as a module, choose M here: the module
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will be called pwm-jz4740.
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config PWM_LP3943
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tristate "TI/National Semiconductor LP3943 PWM support"
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depends on MFD_LP3943
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help
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Generic PWM framework driver for LP3943 which supports two PWM
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channels.
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To compile this driver as a module, choose M here: the module
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will be called pwm-lp3943.
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config PWM_LPC18XX_SCT
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tristate "LPC18xx/43xx PWM/SCT support"
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depends on ARCH_LPC18XX
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help
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Generic PWM framework driver for NXP LPC18xx PWM/SCT which
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supports 16 channels.
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A maximum of 15 channels can be requested simultaneously and
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must have the same period.
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To compile this driver as a module, choose M here: the module
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will be called pwm-lpc18xx-sct.
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config PWM_LPC32XX
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tristate "LPC32XX PWM support"
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depends on ARCH_LPC32XX
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help
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Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two
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PWM controllers.
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To compile this driver as a module, choose M here: the module
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will be called pwm-lpc32xx.
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config PWM_LPSS
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tristate
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config PWM_LPSS_PCI
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tristate "Intel LPSS PWM PCI driver"
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depends on X86 && PCI
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select PWM_LPSS
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help
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The PCI driver for Intel Low Power Subsystem PWM controller.
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To compile this driver as a module, choose M here: the module
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will be called pwm-lpss-pci.
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config PWM_LPSS_PLATFORM
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tristate "Intel LPSS PWM platform driver"
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depends on X86 && ACPI
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select PWM_LPSS
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help
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The platform driver for Intel Low Power Subsystem PWM controller.
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To compile this driver as a module, choose M here: the module
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will be called pwm-lpss-platform.
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config PWM_MESON
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tristate "Amlogic Meson PWM driver"
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depends on ARCH_MESON
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help
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The platform driver for Amlogic Meson PWM controller.
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To compile this driver as a module, choose M here: the module
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will be called pwm-meson.
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config PWM_MTK_DISP
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tristate "MediaTek display PWM driver"
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depends on ARCH_MEDIATEK || COMPILE_TEST
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depends on HAS_IOMEM
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help
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Generic PWM framework driver for MediaTek disp-pwm device.
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The PWM is used to control the backlight brightness for display.
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To compile this driver as a module, choose M here: the module
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will be called pwm-mtk-disp.
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config PWM_MEDIATEK
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tristate "MediaTek PWM support"
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depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST
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help
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Generic PWM framework driver for Mediatek ARM SoC.
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To compile this driver as a module, choose M here: the module
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will be called pwm-mediatek.
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config PWM_MXS
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tristate "Freescale MXS PWM support"
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depends on ARCH_MXS && OF
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select STMP_DEVICE
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help
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Generic PWM framework driver for Freescale MXS.
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To compile this driver as a module, choose M here: the module
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will be called pwm-mxs.
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config PWM_OMAP_DMTIMER
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tristate "OMAP Dual-Mode Timer PWM support"
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depends on OF && ARCH_OMAP && OMAP_DM_TIMER
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help
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Generic PWM framework driver for OMAP Dual-Mode Timer PWM output
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To compile this driver as a module, choose M here: the module
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will be called pwm-omap-dmtimer
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config PWM_PCA9685
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tristate "NXP PCA9685 PWM driver"
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depends on I2C
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select REGMAP_I2C
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help
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Generic PWM framework driver for NXP PCA9685 LED controller.
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To compile this driver as a module, choose M here: the module
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will be called pwm-pca9685.
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config PWM_PUV3
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tristate "PKUnity NetBook-0916 PWM support"
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depends on ARCH_PUV3
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help
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Generic PWM framework driver for PKUnity NetBook-0916.
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To compile this driver as a module, choose M here: the module
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will be called pwm-puv3.
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config PWM_PXA
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tristate "PXA PWM support"
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depends on ARCH_PXA
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help
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Generic PWM framework driver for PXA.
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To compile this driver as a module, choose M here: the module
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will be called pwm-pxa.
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config PWM_RCAR
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tristate "Renesas R-Car PWM support"
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depends on ARCH_RENESAS || COMPILE_TEST
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depends on HAS_IOMEM
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help
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This driver exposes the PWM Timer controller found in Renesas
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R-Car chips through the PWM API.
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To compile this driver as a module, choose M here: the module
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will be called pwm-rcar.
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config PWM_RENESAS_TPU
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tristate "Renesas TPU PWM support"
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depends on ARCH_RENESAS || COMPILE_TEST
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depends on HAS_IOMEM
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help
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This driver exposes the Timer Pulse Unit (TPU) PWM controller found
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in Renesas chips through the PWM API.
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To compile this driver as a module, choose M here: the module
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will be called pwm-renesas-tpu.
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config PWM_ROCKCHIP
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tristate "Rockchip PWM support"
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depends on ARCH_ROCKCHIP
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help
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Generic PWM framework driver for the PWM controller found on
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Rockchip SoCs.
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config PWM_SAMSUNG
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tristate "Samsung PWM support"
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depends on PLAT_SAMSUNG || ARCH_EXYNOS
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help
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Generic PWM framework driver for Samsung.
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To compile this driver as a module, choose M here: the module
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will be called pwm-samsung.
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config PWM_SIFIVE
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tristate "SiFive PWM support"
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depends on OF
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depends on COMMON_CLK
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depends on RISCV || COMPILE_TEST
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help
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Generic PWM framework driver for SiFive SoCs.
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To compile this driver as a module, choose M here: the module
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will be called pwm-sifive.
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config PWM_SPEAR
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tristate "STMicroelectronics SPEAr PWM support"
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depends on PLAT_SPEAR
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depends on OF
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help
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Generic PWM framework driver for the PWM controller on ST
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SPEAr SoCs.
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To compile this driver as a module, choose M here: the module
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will be called pwm-spear.
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config PWM_SPRD
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tristate "Spreadtrum PWM support"
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depends on ARCH_SPRD || COMPILE_TEST
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depends on HAS_IOMEM
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help
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Generic PWM framework driver for the PWM controller on
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Spreadtrum SoCs.
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To compile this driver as a module, choose M here: the module
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will be called pwm-sprd.
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config PWM_STI
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tristate "STiH4xx PWM support"
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depends on ARCH_STI
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depends on OF
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help
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Generic PWM framework driver for STiH4xx SoCs.
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To compile this driver as a module, choose M here: the module
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will be called pwm-sti.
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config PWM_STM32
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tristate "STMicroelectronics STM32 PWM"
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depends on MFD_STM32_TIMERS
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help
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Generic PWM framework driver for STM32 SoCs.
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To compile this driver as a module, choose M here: the module
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will be called pwm-stm32.
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config PWM_STM32_LP
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tristate "STMicroelectronics STM32 PWM LP"
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depends on MFD_STM32_LPTIMER || COMPILE_TEST
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help
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Generic PWM framework driver for STMicroelectronics STM32 SoCs
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with Low-Power Timer (LPTIM).
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To compile this driver as a module, choose M here: the module
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will be called pwm-stm32-lp.
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config PWM_STMPE
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bool "STMPE expander PWM export"
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depends on MFD_STMPE
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help
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This enables support for the PWMs found in the STMPE I/O
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expanders.
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config PWM_SUN4I
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tristate "Allwinner PWM support"
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depends on ARCH_SUNXI || COMPILE_TEST
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depends on HAS_IOMEM && COMMON_CLK
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help
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Generic PWM framework driver for Allwinner SoCs.
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To compile this driver as a module, choose M here: the module
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will be called pwm-sun4i.
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config PWM_TEGRA
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tristate "NVIDIA Tegra PWM support"
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depends on ARCH_TEGRA
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help
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Generic PWM framework driver for the PWFM controller found on NVIDIA
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Tegra SoCs.
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To compile this driver as a module, choose M here: the module
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will be called pwm-tegra.
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config PWM_TIECAP
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tristate "ECAP PWM support"
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depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3
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help
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PWM driver support for the ECAP APWM controller found on TI SOCs
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To compile this driver as a module, choose M here: the module
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will be called pwm-tiecap.
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config PWM_TIEHRPWM
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tristate "EHRPWM PWM support"
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depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3
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help
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PWM driver support for the EHRPWM controller found on TI SOCs
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To compile this driver as a module, choose M here: the module
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will be called pwm-tiehrpwm.
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config PWM_TIPWMSS
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bool
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default y if (ARCH_OMAP2PLUS) && (PWM_TIECAP || PWM_TIEHRPWM)
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help
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PWM Subsystem driver support for AM33xx SOC.
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PWM submodules require PWM config space access from submodule
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drivers and require common parent driver support.
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config PWM_TWL
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tristate "TWL4030/6030 PWM support"
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depends on TWL4030_CORE
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help
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Generic PWM framework driver for TWL4030/6030.
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To compile this driver as a module, choose M here: the module
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will be called pwm-twl.
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config PWM_TWL_LED
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tristate "TWL4030/6030 PWM support for LED drivers"
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depends on TWL4030_CORE
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help
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Generic PWM framework driver for TWL4030/6030 LED terminals.
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To compile this driver as a module, choose M here: the module
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will be called pwm-twl-led.
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config PWM_VT8500
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tristate "vt8500 PWM support"
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depends on ARCH_VT8500
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help
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Generic PWM framework driver for vt8500.
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To compile this driver as a module, choose M here: the module
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will be called pwm-vt8500.
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config PWM_ZX
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tristate "ZTE ZX PWM support"
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depends on ARCH_ZX
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help
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Generic PWM framework driver for ZTE ZX family SoCs.
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To compile this driver as a module, choose M here: the module
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will be called pwm-zx.
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endif
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