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f213729f67
This adds a new counter driver for the Texas Instruments Enhanced Quadrature Encoder Pulse (eQEP) module. Only very basic functionality is currently implemented - only enough to be able to read the position. The actual device has many more features which can be added to the driver on an as-needed basis. It is not possible to read the QEPA/B signal values in hardware, so that feature is omitted. The TI_PWMSS kernel option is selected in Kconfig to enable the parent bus, which is needed for power management. Signed-off-by: David Lechner <david@lechnology.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
74 lines
2.2 KiB
Plaintext
74 lines
2.2 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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#
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# Counter devices
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#
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menuconfig COUNTER
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tristate "Counter support"
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help
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This enables counter device support through the Generic Counter
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interface. You only need to enable this, if you also want to enable
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one or more of the counter device drivers below.
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if COUNTER
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config 104_QUAD_8
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tristate "ACCES 104-QUAD-8 driver"
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depends on PC104 && X86 && IIO
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select ISA_BUS_API
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help
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Say yes here to build support for the ACCES 104-QUAD-8 quadrature
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encoder counter/interface device family (104-QUAD-8, 104-QUAD-4).
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A counter's respective error flag may be cleared by performing a write
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operation on the respective count value attribute. Although the
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104-QUAD-8 counters have a 25-bit range, only the lower 24 bits may be
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set, either directly or via the counter's preset attribute. Interrupts
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are not supported by this driver.
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The base port addresses for the devices may be configured via the base
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array module parameter.
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config STM32_TIMER_CNT
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tristate "STM32 Timer encoder counter driver"
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depends on MFD_STM32_TIMERS || COMPILE_TEST
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help
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Select this option to enable STM32 Timer quadrature encoder
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and counter driver.
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To compile this driver as a module, choose M here: the
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module will be called stm32-timer-cnt.
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config STM32_LPTIMER_CNT
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tristate "STM32 LP Timer encoder counter driver"
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depends on (MFD_STM32_LPTIMER || COMPILE_TEST) && IIO
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help
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Select this option to enable STM32 Low-Power Timer quadrature encoder
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and counter driver.
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To compile this driver as a module, choose M here: the
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module will be called stm32-lptimer-cnt.
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config TI_EQEP
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tristate "TI eQEP counter driver"
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depends on (SOC_AM33XX || COMPILE_TEST)
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select REGMAP_MMIO
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help
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Select this option to enable the Texas Instruments Enhanced Quadrature
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Encoder Pulse (eQEP) counter driver.
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To compile this driver as a module, choose M here: the module will be
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called ti-eqep.
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config FTM_QUADDEC
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tristate "Flex Timer Module Quadrature decoder driver"
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depends on HAS_IOMEM && OF
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help
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Select this option to enable the Flex Timer Quadrature decoder
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driver.
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To compile this driver as a module, choose M here: the
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module will be called ftm-quaddec.
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endif # COUNTER
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