drivers/gpio/Kconfig - kernel/msm-4.9 - Gitiles

 #
 # GPIO infrastructure and expanders
 #

 config ARCH_WANT_OPTIONAL_GPIOLIB
 	bool
 	help
 	  Select this config option from the architecture Kconfig, if
 	  it is possible to use gpiolib on the architecture, but let the
 	  user decide whether to actually build it or not.
 	  Select this instead of ARCH_REQUIRE_GPIOLIB, if your architecture does
 	  not depend on GPIOs being available, but rather let the user
 	  decide whether he needs it or not.

 config ARCH_REQUIRE_GPIOLIB
 	bool
 	select GPIOLIB
 	help
 	  Platforms select gpiolib if they use this infrastructure
 	  for all their GPIOs, usually starting with ones integrated
 	  into SOC processors.
 	  Selecting this from the architecture code will cause the gpiolib
 	  code to always get built in.


 menuconfig GPIOLIB
 	bool "GPIO Support"
 	depends on ARCH_WANT_OPTIONAL_GPIOLIB || ARCH_REQUIRE_GPIOLIB
 	select GENERIC_GPIO
 	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 expansion card drivers below.

 	  If unsure, say N.

 if GPIOLIB

 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 && EXPERIMENTAL
 	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.

 # put expanders in the right section, in alphabetical order

 config GPIO_MAX730X
 	tristate

 comment "Memory mapped GPIO expanders:"

 config GPIO_IT8761E
 	tristate "IT8761E GPIO support"
 	depends on GPIOLIB
 	help
 	  Say yes here to support GPIO functionality of IT8761E super I/O chip.

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

 config GPIO_XILINX
 	bool "Xilinx GPIO support"
 	depends on PPC_OF || MICROBLAZE
 	help
 	  Say yes here to support the Xilinx FPGA GPIO device

 config GPIO_VR41XX
 	tristate "NEC VR4100 series General-purpose I/O Uint support"
 	depends on CPU_VR41XX
 	help
 	  Say yes here to support the NEC VR4100 series General-purpose I/O Uint

 config GPIO_SCH
 	tristate "Intel SCH GPIO"
 	depends on GPIOLIB && PCI
 	select MFD_CORE
 	select LPC_SCH
 	help
 	  Say yes here to support GPIO interface on Intel Poulsbo SCH.
 	  The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
 	  powered by the core power rail and are turned off during sleep
 	  modes (S3 and higher). The remaining four GPIOs are powered by
 	  the Intel SCH suspend power supply. These GPIOs remain
 	  active during S3. The suspend powered GPIOs can be used to wake the
 	  system from the Suspend-to-RAM state.

 	  This driver can also be built as a module. If so, the module
 	  will be called sch-gpio.

 comment "I2C GPIO expanders:"

 config GPIO_MAX7300
 	tristate "Maxim MAX7300 GPIO expander"
 	depends on I2C
 	select GPIO_MAX730X
 	help
 	  GPIO driver for Maxim MAX7301 I2C-based GPIO expander.

 config GPIO_MAX732X
 	tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
 	depends on I2C
 	help
 	  Say yes here to support the MAX7319, MAX7320-7327 series of I2C
 	  Port Expanders. Each IO port on these chips has a fixed role of
 	  Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
 	  Input and Output (designed by 'P'). The combinations are listed
 	  below:

 	  8 bits:	max7319 (8I), max7320 (8O), max7321 (8P),
 		  	max7322 (4I4O), max7323 (4P4O)

 	  16 bits:	max7324 (8I8O), max7325 (8P8O),
 		  	max7326 (4I12O), max7327 (4P12O)

 	  Board setup code must specify the model to use, and the start
 	  number for these GPIOs.

 config GPIO_MAX732X_IRQ
 	bool "Interrupt controller support for MAX732x"
 	depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
 	help
 	  Say yes here to enable the max732x to be used as an interrupt
 	  controller. It requires the driver to be built in the kernel.

 config GPIO_PCA953X
 	tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
 	depends on I2C
 	help
 	  Say yes here to provide access to several register-oriented
 	  SMBus I/O expanders, made mostly by NXP or TI.  Compatible
 	  models include:

 	  4 bits:	pca9536, pca9537

 	  8 bits:	max7310, pca9534, pca9538, pca9554, pca9557,
 	  		tca6408

 	  16 bits:	pca9535, pca9539, pca9555, tca6416

 	  This driver can also be built as a module.  If so, the module
 	  will be called pca953x.

 config GPIO_PCA953X_IRQ
 	bool "Interrupt controller support for PCA953x"
 	depends on GPIO_PCA953X=y
 	help
 	  Say yes here to enable the pca953x to be used as an interrupt
 	  controller. It requires the driver to be built in the kernel.

 config GPIO_PCF857X
 	tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
 	depends on I2C
 	help
 	  Say yes here to provide access to most "quasi-bidirectional" I2C
 	  GPIO expanders used for additional digital outputs or inputs.
 	  Most of these parts are from NXP, though TI is a second source for
 	  some of them.  Compatible models include:

 	  8 bits:   pcf8574, pcf8574a, pca8574, pca8574a,
 	            pca9670, pca9672, pca9674, pca9674a,
 	  	    max7328, max7329

 	  16 bits:  pcf8575, pcf8575c, pca8575,
 	            pca9671, pca9673, pca9675

 	  Your board setup code will need to declare the expanders in
 	  use, and assign numbers to the GPIOs they expose.  Those GPIOs
 	  can then be used from drivers and other kernel code, just like
 	  other GPIOs, but only accessible from task contexts.

 	  This driver provides an in-kernel interface to those GPIOs using
 	  platform-neutral GPIO calls.

 config GPIO_TC35892
 	bool "TC35892 GPIOs"
 	depends on MFD_TC35892
 	help
 	  This enables support for the GPIOs found on the TC35892
 	  I/O Expander.

 config GPIO_TWL4030
 	tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
 	depends on TWL4030_CORE
 	help
 	  Say yes here to access the GPIO signals of various multi-function
 	  power management chips from Texas Instruments.

 config GPIO_WM831X
 	tristate "WM831x GPIOs"
 	depends on MFD_WM831X
 	help
 	  Say yes here to access the GPIO signals of WM831x power management
 	  chips from Wolfson Microelectronics.

 config GPIO_WM8350
 	tristate "WM8350 GPIOs"
 	depends on MFD_WM8350
 	help
 	  Say yes here to access the GPIO signals of WM8350 power management
 	  chips from Wolfson Microelectronics.

 config GPIO_WM8994
 	tristate "WM8994 GPIOs"
 	depends on MFD_WM8994
 	help
 	  Say yes here to access the GPIO signals of WM8994 audio hub
 	  CODECs from Wolfson Microelectronics.

 config GPIO_ADP5520
 	tristate "GPIO Support for ADP5520 PMIC"
 	depends on PMIC_ADP5520
 	help
 	  This option enables support for on-chip GPIO found
 	  on Analog Devices ADP5520 PMICs.

 	  To compile this driver as a module, choose M here: the module will
 	  be called adp5520-gpio.

 config GPIO_ADP5588
 	tristate "ADP5588 I2C GPIO expander"
 	depends on I2C
 	help
 	  This option enables support for 18 GPIOs found
 	  on Analog Devices ADP5588 GPIO Expanders.
 	  To compile this driver as a module, choose M here: the module will be
 	  called adp5588-gpio.

 comment "PCI GPIO expanders:"

 config GPIO_CS5535
 	tristate "AMD CS5535/CS5536 GPIO support"
 	depends on PCI && !CS5535_GPIO
 	help
 	  The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
 	  can be used for quite a number of things.  The CS5535/6 is found on
 	  AMD Geode and Lemote Yeeloong devices.

 	  If unsure, say N.

 config GPIO_BT8XX
 	tristate "BT8XX GPIO abuser"
 	depends on PCI && VIDEO_BT848=n
 	help
 	  The BT8xx frame grabber chip has 24 GPIO pins than can be abused
 	  as a cheap PCI GPIO card.

 	  This chip can be found on Miro, Hauppauge and STB TV-cards.

 	  The card needs to be physically altered for using it as a
 	  GPIO card. For more information on how to build a GPIO card
 	  from a BT8xx TV card, see the documentation file at
 	  Documentation/bt8xxgpio.txt

 	  If unsure, say N.

 config GPIO_LANGWELL
 	bool "Intel Langwell/Penwell GPIO support"
 	depends on PCI
 	help
 	  Say Y here to support Intel Langwell/Penwell GPIO.

 config GPIO_TIMBERDALE
 	bool "Support for timberdale GPIO IP"
 	depends on MFD_TIMBERDALE && GPIOLIB && HAS_IOMEM
 	---help---
 	Add support for the GPIO IP in the timberdale FPGA.

 config GPIO_RDC321X
 	tristate "RDC R-321x GPIO support"
 	depends on PCI && GPIOLIB
 	select MFD_CORE
 	select MFD_RDC321X
 	help
 	  Support for the RDC R321x SoC GPIOs over southbridge
 	  PCI configuration space.

 comment "SPI GPIO expanders:"

 config GPIO_MAX7301
 	tristate "Maxim MAX7301 GPIO expander"
 	depends on SPI_MASTER
 	select GPIO_MAX730X
 	help
 	  GPIO driver for Maxim MAX7301 SPI-based GPIO expander.

 config GPIO_MCP23S08
 	tristate "Microchip MCP23S08 I/O expander"
 	depends on SPI_MASTER
 	help
 	  SPI driver for Microchip MCP23S08 I/O expander.  This provides
 	  a GPIO interface supporting inputs and outputs.

 config GPIO_MC33880
 	tristate "Freescale MC33880 high-side/low-side switch"
 	depends on SPI_MASTER
 	help
 	  SPI driver for Freescale MC33880 high-side/low-side switch.
 	  This provides GPIO interface supporting inputs and outputs.

 comment "AC97 GPIO expanders:"

 config GPIO_UCB1400
 	bool "Philips UCB1400 GPIO"
 	depends on UCB1400_CORE
 	help
 	  This enables support for the Philips UCB1400 GPIO pins.
 	  The UCB1400 is an AC97 audio codec.

 	  To compile this driver as a module, choose M here: the
 	  module will be called ucb1400_gpio.

 comment "MODULbus GPIO expanders:"

 config GPIO_JANZ_TTL
 	tristate "Janz VMOD-TTL Digital IO Module"
 	depends on MFD_JANZ_CMODIO
 	help
 	  This enables support for the Janz VMOD-TTL Digital IO module.
 	  This driver provides support for driving the pins in output
 	  mode only. Input mode is not supported.

 endif
	#
	# GPIO infrastructure and expanders
	#

	config ARCH_WANT_OPTIONAL_GPIOLIB
	bool
	help
	Select this config option from the architecture Kconfig, if
	it is possible to use gpiolib on the architecture, but let the
	user decide whether to actually build it or not.
	Select this instead of ARCH_REQUIRE_GPIOLIB, if your architecture does
	not depend on GPIOs being available, but rather let the user
	decide whether he needs it or not.

	config ARCH_REQUIRE_GPIOLIB
	bool
	select GPIOLIB
	help
	Platforms select gpiolib if they use this infrastructure
	for all their GPIOs, usually starting with ones integrated
	into SOC processors.
	Selecting this from the architecture code will cause the gpiolib
	code to always get built in.



	menuconfig GPIOLIB
	bool "GPIO Support"
	depends on ARCH_WANT_OPTIONAL_GPIOLIB \|\| ARCH_REQUIRE_GPIOLIB
	select GENERIC_GPIO
	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 expansion card drivers below.

	If unsure, say N.

	if GPIOLIB

	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 && EXPERIMENTAL
	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.

	# put expanders in the right section, in alphabetical order

	config GPIO_MAX730X
	tristate

	comment "Memory mapped GPIO expanders:"

	config GPIO_IT8761E
	tristate "IT8761E GPIO support"
	depends on GPIOLIB
	help
	Say yes here to support GPIO functionality of IT8761E super I/O chip.

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

	config GPIO_XILINX
	bool "Xilinx GPIO support"
	depends on PPC_OF \|\| MICROBLAZE
	help
	Say yes here to support the Xilinx FPGA GPIO device

	config GPIO_VR41XX
	tristate "NEC VR4100 series General-purpose I/O Uint support"
	depends on CPU_VR41XX
	help
	Say yes here to support the NEC VR4100 series General-purpose I/O Uint

	config GPIO_SCH
	tristate "Intel SCH GPIO"
	depends on GPIOLIB && PCI
	select MFD_CORE
	select LPC_SCH
	help
	Say yes here to support GPIO interface on Intel Poulsbo SCH.
	The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
	powered by the core power rail and are turned off during sleep
	modes (S3 and higher). The remaining four GPIOs are powered by
	the Intel SCH suspend power supply. These GPIOs remain
	active during S3. The suspend powered GPIOs can be used to wake the
	system from the Suspend-to-RAM state.

	This driver can also be built as a module. If so, the module
	will be called sch-gpio.

	comment "I2C GPIO expanders:"

	config GPIO_MAX7300
	tristate "Maxim MAX7300 GPIO expander"
	depends on I2C
	select GPIO_MAX730X
	help
	GPIO driver for Maxim MAX7301 I2C-based GPIO expander.

	config GPIO_MAX732X
	tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
	depends on I2C
	help
	Say yes here to support the MAX7319, MAX7320-7327 series of I2C
	Port Expanders. Each IO port on these chips has a fixed role of
	Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
	Input and Output (designed by 'P'). The combinations are listed
	below:

	8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
	max7322 (4I4O), max7323 (4P4O)

	16 bits: max7324 (8I8O), max7325 (8P8O),
	max7326 (4I12O), max7327 (4P12O)

	Board setup code must specify the model to use, and the start
	number for these GPIOs.

	config GPIO_MAX732X_IRQ
	bool "Interrupt controller support for MAX732x"
	depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
	help
	Say yes here to enable the max732x to be used as an interrupt
	controller. It requires the driver to be built in the kernel.

	config GPIO_PCA953X
	tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
	depends on I2C
	help
	Say yes here to provide access to several register-oriented
	SMBus I/O expanders, made mostly by NXP or TI. Compatible
	models include:

	4 bits: pca9536, pca9537

	8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
	tca6408

	16 bits: pca9535, pca9539, pca9555, tca6416

	This driver can also be built as a module. If so, the module
	will be called pca953x.

	config GPIO_PCA953X_IRQ
	bool "Interrupt controller support for PCA953x"
	depends on GPIO_PCA953X=y
	help
	Say yes here to enable the pca953x to be used as an interrupt
	controller. It requires the driver to be built in the kernel.

	config GPIO_PCF857X
	tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
	depends on I2C
	help
	Say yes here to provide access to most "quasi-bidirectional" I2C
	GPIO expanders used for additional digital outputs or inputs.
	Most of these parts are from NXP, though TI is a second source for
	some of them. Compatible models include:

	8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
	pca9670, pca9672, pca9674, pca9674a,
	max7328, max7329

	16 bits: pcf8575, pcf8575c, pca8575,
	pca9671, pca9673, pca9675

	Your board setup code will need to declare the expanders in
	use, and assign numbers to the GPIOs they expose. Those GPIOs
	can then be used from drivers and other kernel code, just like
	other GPIOs, but only accessible from task contexts.

	This driver provides an in-kernel interface to those GPIOs using
	platform-neutral GPIO calls.

	config GPIO_TC35892
	bool "TC35892 GPIOs"
	depends on MFD_TC35892
	help
	This enables support for the GPIOs found on the TC35892
	I/O Expander.

	config GPIO_TWL4030
	tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
	depends on TWL4030_CORE
	help
	Say yes here to access the GPIO signals of various multi-function
	power management chips from Texas Instruments.

	config GPIO_WM831X
	tristate "WM831x GPIOs"
	depends on MFD_WM831X
	help
	Say yes here to access the GPIO signals of WM831x power management
	chips from Wolfson Microelectronics.

	config GPIO_WM8350
	tristate "WM8350 GPIOs"
	depends on MFD_WM8350
	help
	Say yes here to access the GPIO signals of WM8350 power management
	chips from Wolfson Microelectronics.

	config GPIO_WM8994
	tristate "WM8994 GPIOs"
	depends on MFD_WM8994
	help
	Say yes here to access the GPIO signals of WM8994 audio hub
	CODECs from Wolfson Microelectronics.

	config GPIO_ADP5520
	tristate "GPIO Support for ADP5520 PMIC"
	depends on PMIC_ADP5520
	help
	This option enables support for on-chip GPIO found
	on Analog Devices ADP5520 PMICs.

	To compile this driver as a module, choose M here: the module will
	be called adp5520-gpio.

	config GPIO_ADP5588
	tristate "ADP5588 I2C GPIO expander"
	depends on I2C
	help
	This option enables support for 18 GPIOs found
	on Analog Devices ADP5588 GPIO Expanders.
	To compile this driver as a module, choose M here: the module will be
	called adp5588-gpio.

	comment "PCI GPIO expanders:"

	config GPIO_CS5535
	tristate "AMD CS5535/CS5536 GPIO support"
	depends on PCI && !CS5535_GPIO
	help
	The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
	can be used for quite a number of things. The CS5535/6 is found on
	AMD Geode and Lemote Yeeloong devices.

	If unsure, say N.

	config GPIO_BT8XX
	tristate "BT8XX GPIO abuser"
	depends on PCI && VIDEO_BT848=n
	help
	The BT8xx frame grabber chip has 24 GPIO pins than can be abused
	as a cheap PCI GPIO card.

	This chip can be found on Miro, Hauppauge and STB TV-cards.

	The card needs to be physically altered for using it as a
	GPIO card. For more information on how to build a GPIO card
	from a BT8xx TV card, see the documentation file at
	Documentation/bt8xxgpio.txt

	If unsure, say N.

	config GPIO_LANGWELL
	bool "Intel Langwell/Penwell GPIO support"
	depends on PCI
	help
	Say Y here to support Intel Langwell/Penwell GPIO.

	config GPIO_TIMBERDALE
	bool "Support for timberdale GPIO IP"
	depends on MFD_TIMBERDALE && GPIOLIB && HAS_IOMEM
	---help---
	Add support for the GPIO IP in the timberdale FPGA.

	config GPIO_RDC321X
	tristate "RDC R-321x GPIO support"
	depends on PCI && GPIOLIB
	select MFD_CORE
	select MFD_RDC321X
	help
	Support for the RDC R321x SoC GPIOs over southbridge
	PCI configuration space.

	comment "SPI GPIO expanders:"

	config GPIO_MAX7301
	tristate "Maxim MAX7301 GPIO expander"
	depends on SPI_MASTER
	select GPIO_MAX730X
	help
	GPIO driver for Maxim MAX7301 SPI-based GPIO expander.

	config GPIO_MCP23S08
	tristate "Microchip MCP23S08 I/O expander"
	depends on SPI_MASTER
	help
	SPI driver for Microchip MCP23S08 I/O expander. This provides
	a GPIO interface supporting inputs and outputs.

	config GPIO_MC33880
	tristate "Freescale MC33880 high-side/low-side switch"
	depends on SPI_MASTER
	help
	SPI driver for Freescale MC33880 high-side/low-side switch.
	This provides GPIO interface supporting inputs and outputs.

	comment "AC97 GPIO expanders:"

	config GPIO_UCB1400
	bool "Philips UCB1400 GPIO"
	depends on UCB1400_CORE
	help
	This enables support for the Philips UCB1400 GPIO pins.
	The UCB1400 is an AC97 audio codec.

	To compile this driver as a module, choose M here: the
	module will be called ucb1400_gpio.

	comment "MODULbus GPIO expanders:"

	config GPIO_JANZ_TTL
	tristate "Janz VMOD-TTL Digital IO Module"
	depends on MFD_JANZ_CMODIO
	help
	This enables support for the Janz VMOD-TTL Digital IO module.
	This driver provides support for driving the pins in output
	mode only. Input mode is not supported.

	endif