linux/drivers/counter/Kconfig
William Breathitt Gray 7aa2ba0df6 counter: 104-quad-8: Add IRQ support for the ACCES 104-QUAD-8
The LSI/CSI LS7266R1 chip provides programmable output via the FLG pins.
When interrupts are enabled on the ACCES 104-QUAD-8, they occur whenever
FLG1 is active. Four functions are available for the FLG1 signal: Carry,
Compare, Carry-Borrow, and Index.

	Carry:
		Interrupt generated on active low Carry signal. Carry
		signal toggles every time the respective channel's
		counter overflows.

	Compare:
		Interrupt generated on active low Compare signal.
		Compare signal toggles every time respective channel's
		preset register is equal to the respective channel's
		counter.

	Carry-Borrow:
		Interrupt generated on active low Carry signal and
		active low Borrow signal. Carry signal toggles every
		time the respective channel's counter overflows. Borrow
		signal toggles every time the respective channel's
		counter underflows.

	Index:
		Interrupt generated on active high Index signal.

These four functions correspond respectivefly to the following four
Counter event types: COUNTER_EVENT_OVERFLOW, COUNTER_EVENT_THRESHOLD,
COUNTER_EVENT_OVERFLOW_UNDERFLOW, and COUNTER_EVENT_INDEX. Interrupts
push Counter events to event channel X, where 'X' is the respective
channel whose FLG1 activated.

This patch adds IRQ support for the ACCES 104-QUAD-8. The interrupt line
numbers for the devices may be configured via the irq array module
parameter.

Acked-by: Syed Nayyar Waris <syednwaris@gmail.com>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Link: https://lore.kernel.org/r/e3a28e100840e3a336fa93fce77445f0e9d9a674.1632884256.git.vilhelm.gray@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-10-17 10:55:55 +01:00

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# SPDX-License-Identifier: GPL-2.0-only
#
# Counter devices
#
menuconfig COUNTER
tristate "Counter support"
help
This enables counter device support through the Generic Counter
interface. You only need to enable this, if you also want to enable
one or more of the counter device drivers below.
if COUNTER
config 104_QUAD_8
tristate "ACCES 104-QUAD-8 driver"
depends on PC104 && X86
select ISA_BUS_API
help
Say yes here to build support for the ACCES 104-QUAD-8 quadrature
encoder counter/interface device family (104-QUAD-8, 104-QUAD-4).
A counter's respective error flag may be cleared by performing a write
operation on the respective count value attribute. Although the
104-QUAD-8 counters have a 25-bit range, only the lower 24 bits may be
set, either directly or via the counter's preset attribute.
The base port addresses for the devices may be configured via the base
array module parameter. The interrupt line numbers for the devices may
be configured via the irq array module parameter.
config INTERRUPT_CNT
tristate "Interrupt counter driver"
depends on GPIOLIB
help
Select this option to enable interrupt counter driver. Any interrupt
source can be used by this driver as the event source.
To compile this driver as a module, choose M here: the
module will be called interrupt-cnt.
config STM32_TIMER_CNT
tristate "STM32 Timer encoder counter driver"
depends on MFD_STM32_TIMERS || COMPILE_TEST
help
Select this option to enable STM32 Timer quadrature encoder
and counter driver.
To compile this driver as a module, choose M here: the
module will be called stm32-timer-cnt.
config STM32_LPTIMER_CNT
tristate "STM32 LP Timer encoder counter driver"
depends on MFD_STM32_LPTIMER || COMPILE_TEST
help
Select this option to enable STM32 Low-Power Timer quadrature encoder
and counter driver.
To compile this driver as a module, choose M here: the
module will be called stm32-lptimer-cnt.
config TI_EQEP
tristate "TI eQEP counter driver"
depends on (SOC_AM33XX || COMPILE_TEST)
select REGMAP_MMIO
help
Select this option to enable the Texas Instruments Enhanced Quadrature
Encoder Pulse (eQEP) counter driver.
To compile this driver as a module, choose M here: the module will be
called ti-eqep.
config FTM_QUADDEC
tristate "Flex Timer Module Quadrature decoder driver"
depends on HAS_IOMEM && OF
help
Select this option to enable the Flex Timer Quadrature decoder
driver.
To compile this driver as a module, choose M here: the
module will be called ftm-quaddec.
config MICROCHIP_TCB_CAPTURE
tristate "Microchip Timer Counter Capture driver"
depends on HAS_IOMEM && OF
select REGMAP_MMIO
help
Select this option to enable the Microchip Timer Counter Block
capture driver.
To compile this driver as a module, choose M here: the
module will be called microchip-tcb-capture.
config INTEL_QEP
tristate "Intel Quadrature Encoder Peripheral driver"
depends on PCI
help
Select this option to enable the Intel Quadrature Encoder Peripheral
driver.
To compile this driver as a module, choose M here: the module
will be called intel-qep.
endif # COUNTER