linux-imx

#

# GPIO infrastructure and drivers

#

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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