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277bb6a29e
The Pistachio SOC from Imagination Technologies includes a Pulse Width Modulation DAC which produces 1 to 4 digital bit-outputs which represent digital waveforms. These PWM outputs are primarily in charge of controlling backlight LED devices. Reviewed-by: Andrew Bresticker <abrestic@chromium.org> Signed-off-by: Naidu Tellapati <Naidu.Tellapati@imgtec.com> Signed-off-by: Sai Masarapu <Sai.Masarapu@imgtec.com> Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com> Reviewed-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> [thierry.reding: fixup license header as discussed on list] Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
376 lines
10 KiB
Text
376 lines
10 KiB
Text
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 || AVR32
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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_KONA
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tristate "Kona PWM support"
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depends on ARCH_BCM_MOBILE
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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_BFIN
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tristate "Blackfin PWM support"
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depends on BFIN_GPTIMERS
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help
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Generic PWM framework driver for Blackfin.
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To compile this driver as a module, choose M here: the module
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will be called pwm-bfin.
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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_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 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_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_IMX
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tristate "i.MX 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.MX.
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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.
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config PWM_JZ4740
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tristate "Ingenic JZ4740 PWM support"
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depends on MACH_JZ4740
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help
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Generic PWM framework driver for Ingenic JZ4740 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_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 "Intel LPSS PWM support"
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depends on X86
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help
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Generic PWM framework driver for Intel Low Power Subsystem PWM
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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.
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config PWM_LPSS_PCI
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tristate "Intel LPSS PWM PCI driver"
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depends on PWM_LPSS && PCI
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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 PWM_LPSS && ACPI
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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_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_PCA9685
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tristate "NXP PCA9685 PWM driver"
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depends on OF && 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_RENESAS_TPU
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tristate "Renesas TPU PWM support"
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depends on ARCH_SHMOBILE || 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_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_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_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 SOC_AM33XX || ARCH_DAVINCI_DA8XX
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help
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PWM driver support for the ECAP APWM controller found on AM33XX
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TI 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-tiecap.
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config PWM_TIEHRPWM
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tristate "EHRPWM PWM support"
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depends on SOC_AM33XX || ARCH_DAVINCI_DA8XX
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help
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PWM driver support for the EHRPWM controller found on AM33XX
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TI 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-tiehrpwm.
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config PWM_TIPWMSS
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bool
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default y if SOC_AM33XX && (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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endif
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