drivers/counter/Kconfig

Source file repositories/reference/linux-study-clean/drivers/counter/Kconfig

File Facts

System
Linux kernel
Corpus path
drivers/counter/Kconfig
Extension
[no extension]
Size
4738 bytes
Lines
151
Domain
Driver Families
Bucket
drivers/counter
Inferred role
Driver Families: build/configuration rule
Status
atlas-only

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

# SPDX-License-Identifier: GPL-2.0-only
#
# Counter devices
#

config I8254
	tristate
	select COUNTER
	select REGMAP
	help
	  Enables support for the i8254 interface library functions. The i8254
	  interface library provides functions to facilitate communication with
	  interfaces compatible with the venerable Intel 8254 Programmable
	  Interval Timer (PIT). The Intel 825x family of chips was first
	  released in the early 1980s but compatible interfaces are nowadays
	  typically found embedded in larger VLSI processing chips and FPGA
	  components.

	  If built as a module its name will be i8254.

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) || COMPILE_TEST
	depends on HAS_IOPORT_MAP
	select ISA_BUS_API
	select REGMAP_MMIO
	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. The 104-QUAD-8
	  counters 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 FTM_QUADDEC
	tristate "Flex Timer Module Quadrature decoder driver"
	depends on SOC_LS1021A || COMPILE_TEST
	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 INTEL_QEP
	tristate "Intel Quadrature Encoder Peripheral driver"
	depends on X86
	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.

Annotation

Implementation Notes