Current File : //usr/src/kernels/3.10.0-957.21.3.el7.centos.plus.x86_64/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.
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
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 GPIO_DEVRES
def_bool y
depends on HAS_IOMEM
config OF_GPIO
def_bool y
depends on OF
config GPIO_ACPI
def_bool y
depends on ACPI
config GPIOLIB_IRQCHIP
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
tristate
# put drivers in the right section, in alphabetical order
config GPIO_AMDPT
tristate "AMD Promontory GPIO support"
depends on ACPI
help
driver for GPIO functionality on Promontory IOHub
Require ACPI ASL code to enumerate as a platform device.
config GPIO_DA9052
tristate "Dialog DA9052 GPIO"
depends on PMIC_DA9052
help
Say yes here to enable the GPIO driver for the DA9052 chip.
config GPIO_DA9055
tristate "Dialog Semiconductor DA9055 GPIO"
depends on MFD_DA9055
help
Say yes here to enable the GPIO driver for the DA9055 chip.
The Dialog DA9055 PMIC chip has 3 GPIO pins that can be
be controller by this driver.
If driver is built as a module it will be called gpio-da9055.
config GPIO_MAX730X
tristate
comment "Memory mapped GPIO drivers:"
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_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_IT8761E
tristate "IT8761E GPIO support"
depends on X86 # unconditional access to IO space.
help
Say yes here to support GPIO functionality of IT8761E super I/O chip.
config GPIO_EM
tristate "Emma Mobile GPIO"
depends on ARM && 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
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_F7188X
tristate "F71882FG and F71889F GPIO support"
depends on X86
help
This option enables support for GPIOs found on Fintek Super-I/O
chips F71882FG and F71889F.
To compile this driver as a module, choose M here: the module will
be called f7188x-gpio.
config GPIO_MOXART
bool "MOXART GPIO support"
depends on ARCH_MOXART
help
Select this option to enable GPIO driver for
MOXA ART SoC devices.
config GPIO_MPC5200
def_bool y
depends on PPC_MPC52xx
config GPIO_MPC8XXX
bool "MPC512x/MPC8xxx GPIO support"
depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \
FSL_SOC_BOOKE || PPC_86xx
help
Say Y here if you're going to use hardware that connects to the
MPC512x/831x/834x/837x/8572/8610 GPIOs.
config GPIO_MSM_V1
tristate "Qualcomm MSM GPIO v1"
depends on GPIOLIB && ARCH_MSM && (ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50)
help
Say yes here to support the GPIO interface on ARM v6 based
Qualcomm MSM chips. Most of the pins on the MSM can be
selected for GPIO, and are controlled by this driver.
config GPIO_MSM_V2
tristate "Qualcomm MSM GPIO v2"
depends on GPIOLIB && OF && ARCH_MSM
help
Say yes here to support the GPIO interface on ARM v7 based
Qualcomm MSM chips. Most of the pins on the MSM can be
selected for GPIO, and are controlled by this driver.
config GPIO_MVEBU
def_bool y
depends on PLAT_ORION
depends on OF
select GPIO_GENERIC
select GENERIC_IRQ_CHIP
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_PL061
bool "PrimeCell PL061 GPIO support"
depends on ARM_AMBA
select GENERIC_IRQ_CHIP
help
Say yes here to support the PrimeCell PL061 GPIO 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 ARM
help
Say yes here to support GPIO on Renesas R-Car SoCs.
config GPIO_SAMSUNG
bool
depends on PLAT_SAMSUNG
help
Legacy GPIO support. Use only for platforms without support for
pinctrl.
config GPIO_SCH311X
tristate "SMSC SCH311x SuperI/O GPIO"
help
Driver to enable the GPIOs found on SMSC SMSC SCH3112, SCH3114 and
SCH3116 "Super I/O" chipsets.
To compile this driver as a module, choose M here: the module will
be called gpio-sch311x.
config GPIO_SPEAR_SPICS
bool "ST SPEAr13xx SPI Chip Select as GPIO support"
depends on PLAT_SPEAR
select GENERIC_IRQ_CHIP
help
Say yes here to support ST SPEAr SPI Chip Select as GPIO device
config GPIO_STA2X11
bool "STA2x11/ConneXt GPIO support"
depends on MFD_STA2X11
select GENERIC_IRQ_CHIP
help
Say yes here to support the STA2x11/ConneXt GPIO device.
The GPIO module has 128 GPIO pins with alternate functions.
config GPIO_TS5500
tristate "TS-5500 DIO blocks and compatibles"
help
This driver supports Digital I/O exposed by pin blocks found on some
Technologic Systems platforms. It includes, but is not limited to, 3
blocks of the TS-5500: DIO1, DIO2 and the LCD port, and the TS-5600
LCD port.
config GPIO_XILINX
bool "Xilinx GPIO support"
depends on PPC_OF || MICROBLAZE || ARCH_ZYNQ
help
Say yes here to support the Xilinx FPGA GPIO device
config GPIO_XTENSA
bool "Xtensa GPIO32 support"
depends on XTENSA
depends on !SMP
help
Say yes here to support the Xtensa internal GPIO32 IMPWIRE (input)
and EXPSTATE (output) ports
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/TunnelCreek/Centerton GPIO"
depends on PCI && X86
select MFD_CORE
select LPC_SCH
help
Say yes here to support GPIO interface on Intel Poulsbo SCH,
Intel Tunnel Creek processor or Intel Centerton processor.
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.
The Intel Tunnel Creek processor has 5 GPIOs powered by the
core power rail and 9 from suspend power supply.
The Intel Centerton processor has a total of 30 GPIO pins.
Twenty-one are powered by the core power rail and 9 from the
suspend power supply.
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 ARM && (ARCH_IOP32X || ARCH_IOP33X)
help
Say yes here to support the GPIO functionality of a number of Intel
IOP32X or IOP33X.
If unsure, say N.
config GPIO_VX855
tristate "VIA VX855/VX875 GPIO"
depends on PCI && GENERIC_HARDIRQS
select MFD_CORE
select MFD_VX855
help
Support access to the VX855/VX875 GPIO lines through the gpio library.
This driver provides common support for accessing the device,
additional drivers must be enabled in order to use the
functionality of the device.
config GPIO_GE_FPGA
bool "GE FPGA based GPIO"
depends on GE_FPGA
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_LYNXPOINT
tristate "Intel Lynxpoint GPIO support"
depends on ACPI && X86
select IRQ_DOMAIN
help
driver for GPIO functionality on Intel Lynxpoint PCH chipset
Requires ACPI device enumeration code to set up a platform device.
config GPIO_GRGPIO
tristate "Aeroflex Gaisler GRGPIO support"
depends on OF
select GPIO_GENERIC
select IRQ_DOMAIN
help
Select this to support Aeroflex Gaisler GRGPIO cores from the GRLIB
VHDL IP core library.
comment "I2C GPIO expanders:"
config GPIO_ARIZONA
tristate "Wolfson Microelectronics Arizona class devices"
depends on MFD_ARIZONA
help
Support for GPIOs on Wolfson Arizona class devices.
config GPIO_MAX7300
tristate "Maxim MAX7300 GPIO expander"
depends on I2C
select GPIO_MAX730X
help
GPIO driver for Maxim MAX7300 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_MC9S08DZ60
bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions"
depends on I2C=y && MACH_MX35_3DS
help
Select this to enable the MC9S08DZ60 GPIO driver
config GPIO_PCA953X
tristate "PCA953x, PCA955x, PCA957x, 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, max7315, pca6107, pca9534, pca9538, pca9554,
pca9556, pca9557, pca9574, tca6408
16 bits: max7312, max7313, pca9535, pca9539, pca9555, pca9575,
tca6416
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
select IRQ_DOMAIN
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_RC5T583
bool "RICOH RC5T583 GPIO"
depends on MFD_RC5T583
help
Select this option to enable GPIO driver for the Ricoh RC5T583
chip family.
This driver provides the support for driving/reading the gpio pins
of RC5T583 device through standard gpio library.
config GPIO_SX150X
bool "Semtech SX150x I2C GPIO expander"
depends on I2C=y
default n
help
Say yes here to provide support for Semtech SX150-series I2C
GPIO expanders. Compatible models include:
8 bits: sx1508q
16 bits: sx1509q
config GPIO_STMPE
bool "STMPE GPIOs"
depends on MFD_STMPE
help
This enables support for the GPIOs found on the STMPE I/O
Expanders.
config GPIO_STP_XWAY
bool "XWAY STP GPIOs"
depends on SOC_XWAY
help
This enables support for the Serial To Parallel (STP) unit found on
XWAY SoC. The STP allows the SoC to drive a shift registers cascade,
that can be up to 24 bit. This peripheral is aimed at driving leds.
Some of the gpios/leds can be auto updated by the soc with dsl and
phy status.
config GPIO_TC3589X
bool "TC3589X GPIOs"
depends on MFD_TC3589X
help
This enables support for the GPIOs found on the TC3589X
I/O Expander.
config GPIO_TPS65912
tristate "TI TPS65912 GPIO"
depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI)
help
This driver supports TPS65912 gpio chip
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_TWL6040
tristate "TWL6040 GPO"
depends on TWL6040_CORE
help
Say yes here to access the GPO signals of twl6040
audio chip 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.
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.
config GPIO_ADP5588_IRQ
bool "Interrupt controller support for ADP5588"
depends on GPIO_ADP5588=y
help
Say yes here to enable the adp5588 to be used as an interrupt
controller. It requires the driver to be built in the kernel.
config GPIO_ADNP
tristate "Avionic Design N-bit GPIO expander"
depends on I2C && OF_GPIO
help
This option enables support for N GPIOs found on Avionic Design
I2C GPIO expanders. The register space will be extended by powers
of two, so the controller will need to accommodate for that. For
example: if a controller provides 48 pins, 6 registers will be
enough to represent all pins, but the driver will assume a
register layout for 64 pins (8 registers).
comment "PCI GPIO expanders:"
config GPIO_CS5535
tristate "AMD CS5535/CS5536 GPIO support"
depends on PCI && X86 && MFD_CS5535
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_AMD8111
tristate "AMD 8111 GPIO driver"
depends on PCI
help
The AMD 8111 south bridge contains 32 GPIO pins which can be used.
Note, that usually system firmware/ACPI handles GPIO pins on their
own and users might easily break their systems with uncarefull usage
of this driver!
If unsure, say N
config GPIO_LANGWELL
bool "Intel Langwell/Penwell GPIO support"
depends on PCI && X86
select IRQ_DOMAIN
help
Say Y here to support Intel Langwell/Penwell GPIO.
config GPIO_PCH
tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO"
depends on PCI && X86
select GENERIC_IRQ_CHIP
help
This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
which is an IOH(Input/Output Hub) for x86 embedded processor.
This driver can access PCH GPIO device.
This driver also can be used for LAPIS Semiconductor IOH(Input/
Output Hub), ML7223 and ML7831.
ML7223 IOH is for MP(Media Phone) use.
ML7831 IOH is for general purpose use.
ML7223/ML7831 is companion chip for Intel Atom E6xx series.
ML7223/ML7831 is completely compatible for Intel EG20T PCH.
config GPIO_ML_IOH
tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
depends on PCI
select GENERIC_IRQ_CHIP
help
ML7213 is companion chip for Intel Atom E6xx series.
This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
Hub) which is for IVI(In-Vehicle Infotainment) use.
This driver can access the IOH's GPIO device.
config GPIO_SODAVILLE
bool "Intel Sodaville GPIO support"
depends on X86 && PCI && OF
select GPIO_GENERIC
select GENERIC_IRQ_CHIP
help
Say Y here to support Intel Sodaville GPIO.
config GPIO_TIMBERDALE
bool "Support for timberdale GPIO IP"
depends on MFD_TIMBERDALE && 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 && GENERIC_HARDIRQS
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 MCP23xxx I/O expander"
depends on (SPI_MASTER && !I2C) || I2C && OF_GPIO
help
SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
I/O expanders.
This provides a GPIO interface supporting inputs and outputs.
The I2C versions of the chips can be used as interrupt-controller.
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.
config GPIO_74X164
tristate "74x164 serial-in/parallel-out 8-bits shift register"
depends on SPI_MASTER
help
Platform driver for 74x164 compatible serial-in/parallel-out
8-outputs shift registers. This driver can be used to provide access
to more gpio outputs.
comment "AC97 GPIO expanders:"
config GPIO_UCB1400
tristate "Philips UCB1400 GPIO"
depends on UCB1400_CORE
help
This enables support for the Philips UCB1400 GPIO pins.
The UCB1400 is an AC97 audio codec.
comment "LPC GPIO expanders:"
config GPIO_KEMPLD
tristate "Kontron ETX / COMexpress GPIO"
depends on MFD_KEMPLD
help
This enables support for the PLD GPIO interface on some Kontron ETX
and COMexpress (ETXexpress) modules.
This driver can also be built as a module. If so, the module will be
called gpio-kempld.
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.
config GPIO_PALMAS
bool "TI PALMAS series PMICs GPIO"
depends on MFD_PALMAS
help
Select this option to enable GPIO driver for the TI PALMAS
series chip family.
config GPIO_TPS6586X
bool "TPS6586X GPIO"
depends on MFD_TPS6586X
help
Select this option to enable GPIO driver for the TPS6586X
chip family.
config GPIO_TPS65910
bool "TPS65910 GPIO"
depends on MFD_TPS65910
help
Select this option to enable GPIO driver for the TPS65910
chip family.
config GPIO_MSIC
bool "Intel MSIC mixed signal gpio support"
depends on MFD_INTEL_MSIC
help
Enable support for GPIO on intel MSIC controllers found in
intel MID devices
comment "USB GPIO expanders:"
config GPIO_VIPERBOARD
tristate "Viperboard GPIO a & b support"
depends on MFD_VIPERBOARD && USB
help
Say yes here to access the GPIO signals of Nano River
Technologies Viperboard. There are two GPIO chips on the
board: gpioa and gpiob.
See viperboard API specification and Nano
River Tech's viperboard.h for detailed meaning
of the module parameters.
endif
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