path: root/drivers/gpio/Kconfig

#
# GPIO infrastructure and drivers
#

config ARCH_HAVE_CUSTOM_GPIO_H
	bool
	help
	  Selecting this config option from the architecture Kconfig allows
	  the architecture to provide a custom asm/gpio.h implementation
	  overriding the default implementations.  New uses of this are
	  strongly discouraged.

menuconfig GPIOLIB
	bool "GPIO Support"
	select ANON_INODES
	help
	  This enables GPIO support through the generic GPIO library.
	  You only need to enable this, if you also want to enable
	  one or more of the GPIO drivers below.

	  If unsure, say N.

if GPIOLIB

config GPIOLIB_FASTPATH_LIMIT
	int "Maximum number of GPIOs for fast path"
	range 32 512
	default 512
	help
	   This adjusts the point at which certain APIs will switch from
	   using a stack allocated buffer to a dynamically allocated buffer.

	   You shouldn't need to change this unless you really need to
	   optimize either stack space or performance. Change this carefully
	   since setting an incorrect value could cause stack corruption.

config OF_GPIO
	def_bool y
	depends on OF
	depends on HAS_IOMEM

config GPIO_ACPI
	def_bool y
	depends on ACPI

config GPIOLIB_IRQCHIP
	select IRQ_DOMAIN
	bool

config DEBUG_GPIO
	bool "Debug GPIO calls"
	depends on DEBUG_KERNEL
	help
	  Say Y here to add some extra checks and diagnostics to GPIO calls.
	  These checks help ensure that GPIOs have been properly initialized
	  before they are used, and that sleeping calls are not made from
	  non-sleeping contexts.  They can make bitbanged serial protocols
	  slower.  The diagnostics help catch the type of setup errors
	  that are most common when setting up new platforms or boards.

config GPIO_SYSFS
	bool "/sys/class/gpio/... (sysfs interface)"
	depends on SYSFS
	help
	  Say Y here to add a sysfs interface for GPIOs.

	  This is mostly useful to work around omissions in a system's
	  kernel support.  Those are common in custom and semicustom
	  hardware assembled using standard kernels with a minimum of
	  custom patches.  In those cases, userspace code may import
	  a given GPIO from the kernel, if no kernel driver requested it.

	  Kernel drivers may also request that a particular GPIO be
	  exported to userspace; this can be useful when debugging.

config GPIO_GENERIC
	depends on HAS_IOMEM # Only for IOMEM drivers
	tristate

# put drivers in the right section, in alphabetical order

# This symbol is selected by both I2C and SPI expanders
config GPIO_MAX730X
	tristate

menu "Memory mapped GPIO drivers"
	depends on HAS_IOMEM

config GPIO_74XX_MMIO
	tristate "GPIO driver for 74xx-ICs with MMIO access"
	depends on OF_GPIO
	select GPIO_GENERIC
	help
	  Say yes here to support GPIO functionality for 74xx-compatible ICs
	  with MMIO access. Compatible models include:
	    1 bit:	741G125 (Input), 741G74 (Output)
	    2 bits:	742G125 (Input), 7474 (Output)
	    4 bits:	74125 (Input), 74175 (Output)
	    6 bits:	74365 (Input), 74174 (Output)
	    8 bits:	74244 (Input), 74273 (Output)
	    16 bits:	741624 (Input), 7416374 (Output)

config GPIO_ALTERA
	tristate "Altera GPIO"
	depends on OF_GPIO
	select GPIOLIB_IRQCHIP
	help
	  Say Y or M here to build support for the Altera PIO device.

	  If driver is built as a module it will be called gpio-altera.

config GPIO_AMDPT
	tristate "AMD Promontory GPIO support"
	depends on ACPI
	select GPIO_GENERIC
	help
	  driver for GPIO functionality on Promontory IOHub
	  Require ACPI ASL code to enumerate as a platform device.

config GPIO_ASPEED
	tristate "Aspeed GPIO support"
	depends on (ARCH_ASPEED || COMPILE_TEST) && OF_GPIO
	select GPIOLIB_IRQCHIP
	help
	  Say Y here to support Aspeed AST2400 and AST2500 GPIO controllers.

config GPIO_ATH79
	tristate "Atheros AR71XX/AR724X/AR913X GPIO support"
	default y if ATH79
	depends on ATH79 || COMPILE_TEST
	select GPIO_GENERIC
	select GPIOLIB_IRQCHIP
	help
	  Select this option to enable GPIO driver for
	  Atheros AR71XX/AR724X/AR913X SoC devices.

config GPIO_RASPBERRYPI_EXP
	tristate "Raspberry Pi 3 GPIO Expander"
	default RASPBERRYPI_FIRMWARE
	depends on OF_GPIO
	# Make sure not 'y' when RASPBERRYPI_FIRMWARE is 'm'. This can only
	# happen when COMPILE_TEST=y, hence the added !RASPBERRYPI_FIRMWARE.
	depends on (ARCH_BCM2835 && RASPBERRYPI_FIRMWARE) || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE)
	help
	  Turn on GPIO support for the expander on Raspberry Pi 3 boards, using
	  the firmware mailbox to communicate with VideoCore on BCM283x chips.

config GPIO_BCM_KONA
	bool "Broadcom Kona GPIO"
	depends on OF_GPIO && (ARCH_BCM_MOBILE || COMPILE_TEST)
	help
	  Turn on GPIO support for Broadcom "Kona" chips.

config GPIO_BRCMSTB
	tristate "BRCMSTB GPIO support"
	default y if (ARCH_BRCMSTB || BMIPS_GENERIC)
	depends on OF_GPIO && (ARCH_BRCMSTB || BMIPS_GENERIC || COMPILE_TEST)
	select GPIO_GENERIC
	select IRQ_DOMAIN
	help
	  Say yes here to enable GPIO support for Broadcom STB (BCM7XXX) SoCs.

config GPIO_CLPS711X
	tristate "CLPS711X GPIO support"
	depends on ARCH_CLPS711X || COMPILE_TEST
	select GPIO_GENERIC
	help
	  Say yes here to support GPIO on CLPS711X SoCs.

config GPIO_DAVINCI
	bool "TI Davinci/Keystone GPIO support"
	default y if ARCH_DAVINCI
	depends on ARM && (ARCH_DAVINCI || ARCH_KEYSTONE)
	help
	  Say yes here to enable GPIO support for TI Davinci/Keystone SoCs.

config GPIO_DWAPB
	tristate "Synopsys DesignWare APB GPIO driver"
	select GPIO_GENERIC
	select GENERIC_IRQ_CHIP
	help
	  Say Y or M here to build support for the Synopsys DesignWare APB
	  GPIO block.

config GPIO_EIC_SPRD
	tristate "Spreadtrum EIC support"
	depends on ARCH_SPRD || COMPILE_TEST
	depends on OF_GPIO
	select GPIOLIB_IRQCHIP
	help
	  Say yes here to support Spreadtrum EIC device.

config GPIO_EM
	tristate "Emma Mobile GPIO"
	depends on (ARCH_EMEV2 || COMPILE_TEST) && OF_GPIO
	help
	  Say yes here to support GPIO on Renesas Emma Mobile SoCs.

config GPIO_EP93XX
	def_bool y
	depends on ARCH_EP93XX
	select GPIO_GENERIC
	select GPIOLIB_IRQCHIP

config GPIO_EXAR
	tristate "Support for GPIO pins on XR17V352/354/358"
	depends on SERIAL_8250_EXAR
	help
	  Selecting this option will enable handling of GPIO pins present
	  on Exar XR17V352/354/358 chips.

config GPIO_GE_FPGA
	bool "GE FPGA based GPIO"
	depends on GE_FPGA
	select GPIO_GENERIC
	help
	  Support for common GPIO functionality provided on some GE Single Board
	  Computers.

	  This driver provides basic support (configure as input or output, read
	  and write pin state) for GPIO implemented in a number of GE single
	  board computers.

config GPIO_FTGPIO010
	bool "Faraday FTGPIO010 GPIO"
	depends on OF_GPIO
	select GPIO_GENERIC
	select GPIOLIB_IRQCHIP
	default (ARCH_GEMINI || ARCH_MOXART)
	help
	  Support for common GPIOs from the Faraday FTGPIO010 IP core, found in
	  Cortina systems Gemini platforms, Moxa ART and others.

config GPIO_GENERIC_PLATFORM
	tristate "Generic memory-mapped GPIO controller support (MMIO platform device)"
	select GPIO_GENERIC
	help
	  Say yes here to support basic platform_device memory-mapped GPIO controllers.

config GPIO_GRGPIO
	tristate "Aeroflex Gaisler GRGPIO support"
	depends on OF_GPIO
	select GPIO_GENERIC
	select IRQ_DOMAIN
	help
	  Select this to support Aeroflex Gaisler GRGPIO cores from the GRLIB
	  VHDL IP core library.

config GPIO_HLWD
	tristate "Nintendo Wii (Hollywood) GPIO"
	depends on OF_GPIO
	select GPIO_GENERIC
	help
	  Select this to support the GPIO controller of the Nintendo Wii.

	  If unsure, say N.

config GPIO_ICH
	tristate "Intel ICH GPIO"
	depends on PCI && X86
	select MFD_CORE
	select LPC_ICH
	help
	  Say yes here to support the GPIO functionality of a number of Intel
	  ICH-based chipsets.  Currently supported devices: ICH6, ICH7, ICH8
	  ICH9, ICH10, Series 5/3400 (eg Ibex Peak), Series 6/C200 (eg
	  Cougar Point), NM10 (Tiger Point), and 3100 (Whitmore Lake).

	  If unsure, say N.

config GPIO_IOP
	tristate "Intel IOP GPIO"
	depends on ARCH_IOP32X || ARCH_IOP33X || COMPILE_TEST
	select GPIO_GENERIC
	help
	  Say yes here to support the GPIO functionality of a number of Intel
	  IOP32X or IOP33X.

	  If unsure, say N.

config GPIO_LOONGSON
	bool "Loongson-2/3 GPIO support"
	depends on CPU_LOONGSON2 || CPU_LOONGSON3
	help
	  driver for GPIO functionality on Loongson-2F/3A/3B processors.

config GPIO_LPC18XX
	tristate "NXP LPC18XX/43XX GPIO support"
	default y if ARCH_LPC18XX
	depends on OF_GPIO && (ARCH_LPC18XX || COMPILE_TEST)
	help
	  Select this option to enable GPIO driver for
	  NXP LPC18XX/43XX devices.

config GPIO_LYNXPOINT
	tristate "Intel Lynxpoint GPIO support"
	depends on ACPI && X86
	select GPIOLIB_IRQCHIP
	help
	  driver for GPIO functionality on Intel Lynxpoint PCH chipset
	  Requires ACPI device enumeration code to set up a platform device.

config GPIO_MB86S7X
	tristate "GPIO support for Fujitsu MB86S7x Platforms"
	help
	  Say yes here to support the GPIO controller in Fujitsu MB86S70 SoCs.

config GPIO_MENZ127
	tristate "MEN 16Z127 GPIO support"
	depends on MCB
	select GPIO_GENERIC
	help
	 Say yes here to support the MEN 16Z127 GPIO Controller

config GPIO_MM_LANTIQ
	bool "Lantiq Memory mapped GPIOs"
	depends on LANTIQ && SOC_XWAY
	help
	  This enables support for memory mapped GPIOs on the External Bus Unit
	  (EBU) found on Lantiq SoCs. The gpios are output only as they are
	  created by attaching a 16bit latch to the bus.

config GPIO_MOCKUP
	tristate "GPIO Testing Driver"
	depends on GPIOLIB && SYSFS
	select GPIO_SYSFS
	select GPIOLIB_IRQCHIP
	select IRQ_SIM
	help
	  This enables GPIO Testing driver, which provides a way to test GPIO
	  subsystem through sysfs(or char device) and debugfs. GPIO_SYSFS
	  must be selected for this test.
	  User could use it through the script in
	  tools/testing/selftests/gpio/gpio-mockup.sh. Reference the usage in
	  it.

config GPIO_MPC5200
	def_bool y
	depends on PPC_MPC52xx

config GPIO_MPC8XXX
	bool "MPC512x/MPC8xxx/QorIQ GPIO support"
	depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \
		   FSL_SOC_BOOKE || PPC_86xx || ARCH_LAYERSCAPE || ARM || \
		   COMPILE_TEST
	select GPIO_GENERIC
	select IRQ_DOMAIN
	help
	  Say Y here if you're going to use hardware that connects to the
	  MPC512x/831x/834x/837x/8572/8610/QorIQ GPIOs.

config GPIO_MT7621
	bool "Mediatek MT7621 GPIO Support"
	depends on SOC_MT7620 || SOC_MT7621 || COMPILE_TEST
	depends on OF_GPIO
	select GPIO_GENERIC
	select GPIOLIB_IRQCHIP
	help
	  Say yes here to support the Mediatek MT7621 SoC GPIO device

config GPIO_MVEBU
	def_bool y
	depends on PLAT_ORION || ARCH_MVEBU
	depends on OF_GPIO
	select GENERIC_IRQ_CHIP
	select REGMAP_MMIO

config GPIO_MXC
	def_bool y
	depends on ARCH_MXC
	select GPIO_GENERIC
	select GENERIC_IRQ_CHIP

config GPIO_MXS
	def_bool y
	depends on ARCH_MXS
	select GPIO_GENERIC
	select GENERIC_IRQ_CHIP

config GPIO_OCTEON
	tristate "Cavium OCTEON GPIO"
	depends on GPIOLIB && CAVIUM_OCTEON_SOC
	default y
	help
	  Say yes here to support the on-chip GPIO lines on the OCTEON
	  family of SOCs.

config GPIO_OMAP
	tristate "TI OMAP GPIO support" if ARCH_OMAP2PLUS || COMPILE_TEST
	default y if ARCH_OMAP
	depends on ARM
	select GENERIC_IRQ_CHIP
	select GPIOLIB_IRQCHIP
	help
	  Say yes here to enable GPIO support for TI OMAP SoCs.

config GPIO_PL061
	bool "PrimeCell PL061 GPIO support"
	depends on ARM_AMBA
	select IRQ_DOMAIN
	select GPIOLIB_IRQCHIP
	help
	  Say yes here to support the PrimeCell PL061 GPIO device

config GPIO_PMIC_EIC_SPRD
	tristate "Spreadtrum PMIC EIC support"
	depends on MFD_SC27XX_PMIC || COMPILE_TEST
	depends on OF_GPIO
	select GPIOLIB_IRQCHIP
	help
	  Say yes here to support Spreadtrum PMIC EIC device.

config GPIO_PXA
	bool "PXA GPIO support"
	depends on ARCH_PXA || ARCH_MMP
	help
	  Say yes here to support the PXA GPIO device

config GPIO_RCAR
	tristate "Renesas R-Car GPIO"
	depends on ARCH_RENESAS || COMPILE_TEST
	select GPIOLIB_IRQCHIP
	help
	  Say yes here to support GPIO on Renesas R-Car SoCs.

config GPIO_REG
	bool
	help
	  A 32-bit single register GPIO fixed in/out implementation.  This
	  can be used to represent any register as a set of GPIO signals.

config GPIO_SIOX
	tristate "SIOX GPIO support"
	depends on SIOX
	select GPIOLIB_IRQCHIP
	help
	  Say yes here to support SIOX I/O devices. These are units connected
	  via a SIOX bus and have a number of fixed-direction I/O lines.

config GPIO_SNPS_CREG
	bool "Synopsys GPIO via CREG (Control REGisters) driver"
	depends on ARC ||